Cadant C4 CMTSCable Modem Termination System
C4 CMTS User Documentation
Documentation Set Release 4.2, Standard July 2005
ARRIS PROPRIETARY This document contains proprietary information
of ARRIS, Inc. and is not to be disclosed or used except in
accordance with applicable agreements. 2005 ARRIS All Rights
Reserved 07/05/05
Copyright and Trademark InformationCadant C4 G2 IMS FlexCAM
ARRIS and Arris International are trademarks of ARRIS
International, Inc. Cadant C4 CMTS is a registered trademark of
ARRIS International, Inc. All other trademarks and registered
trademarks are the property of their respective holders. Every
attempt has been made to capitalize and spell correctly the
trademarked and service marked terms used in this manual. ARRIS
does not attest to the accuracy of these terms and their usage. Any
misspelling or misuse of a term should not be construed as
affecting the validity of its trademark or service mark. All
information contained in this document is subject to change without
notice. ARRIS reserves the right to make changes to equipment
design or program components, as progress in engineering,
manufacturing methods, or other circumstances may warrant. The G2
IMS product contains copyright material licensed from AdventNet,
Inc. http://www.adventnet.com. All rights to such copyrighted
material rest with AdventNet. The ARRIS Cadant C4 Cable Modem
Termination System (CMTS) has been qualified by CableLabs for
DOCSIS1.1 and by tComLabs for Euro-DOCSIS 1.1. In June, 2004,
CableLabs announced that the C4 CMTS qualified for DOCSIS 2.0.
PacketCable is a trademark of Cable Television Laboratories, Inc.
Broadcom is a registered trademark of the Broadcom Corporation,
http://broadcom.com.
Patent InformationThe ARRIS Cadant C4 Cable Modem Termination
System (CMTS) is protected by U.S. and international patents
including: 6,457,978 6,662,368 6,449,249 6,636,482 6,637,033
Additional ARRIS International, Inc. patents pending: 6,457,978;
6,769,132; 6,662,368; 6449,249; 6,636,482; 6,637,033;
6,898,182;
2005 ARRIS All rights reserved.
CADANT C4 CMTS LIMITED WARRANTY1. SOFTWARE WARRANTY ARRlS
International, Inc. ("ARRIS") Warrants that for a period of ninety
(90) days from delivery of the Software (the "Software Warranty
Period), the Software will perform in substantial conformance with
the technical specifications for such Software set forth in the
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reasonable efforts to correct any reproducible errors identified by
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with functionally equivalent Software or (iii) to accept return of
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that the Software will work in combination with any hardware or
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operation of the Software will be uninterrupted or error free, or
that all defects in the Software can be corrected. ARRIS shall not
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(Software Warranty) for any errors or any defects in the Software
upon expiration of the Software Warranty Period. 2. HARDWARE
WARRANTY ARRIS warrants to Purchaser that under normal use and
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reproducible Hardware errors identified by Purchaser in writing
during the Hardware Warranty Period which renders the Hardware
non-conforming, (ii) to replace the Hardware or (iii) accept return
of the Hardware from Purchaser. ARRIS shall not be responsible for
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or memory data contained in, stored on, or integrated with any
Hardware Products returned to ARRIS pursuant to any Warranty
provided under this Agreement. 3. OBTAINING WARRANTY SERVICE To
make a return under the Warranty above, the Purchaser must notify
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A SEPARATE WRITING BETWEEN THE PARTIES, THIS WARRANTY IS IN LIEU OF
ALL OTHER WARRANTIES WITH RESPECT TO HARDWARE OR SOFTWARE DELIVERED
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OTHER THIRD PARTY ON THE DATE HEREOF. NO WAIVER, ALTERATION, OR
MODIFICATION OF THIS WARRANTY SHALL BE BINDING AGAINST THE ARRIS
UNLESS IN WRITING AS A SEPARATE AMENDMENT HERETO AND SIGNED BY TWO
(2) AUTHORIZED EXECUTIVE OFFICERS OF ARRIS. 2005 ARRIS All rights
reserved.
5. WARRANTY LIMITATIONS. ARRIS shall be relieved of all
obligations and liability under the Warranty provisions set forth
herein, if: a The Hardware or Software is operated with, or the
error or defect is due to, any accessory, equipment, software or
part not approved by ARRIS; b The Hardware or Software shall not
have been installed, operated and maintained in accordance with
ARRlS's instructions and Documentation; c The Hardware or Software
has been repaired, altered or modified by someone other than ARRlS;
d Purchaser does not notify ARRlS in writing of the error or defect
within the applicable Warranty Period with sufficient information
for ARRIS to identify and reproduce such error or defect or fails
to return the defective Hardware or Software in accordance with the
terms of this Agreement; or e ARRIS can demonstrate that the
alleged error or defect in the Software or Hardware does not exist
or was caused by Purchaser's or any third party's misuse, neglect,
improper installation or testing, or negligent repair or any other
cause beyond the range of the intended use, or by accident, fire,
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LIMITED REMEDIES, WARRANTY DISCLAIMER AND LIMITED LIABILITY ARE
FUNDAMENTAL ELEMENTS OF THE BASIS OF THE BARGAIN BETWEEN ARRIS AND
CUSTOMER. ARRIS WOULD NOT BE ABLE TO PROVIDE THE PRODUCT WITHOUT
SUCH LIMITATIONS.
Cadant C4 CMTS - Software License AgreementEXCEPT AS SET FORTH
IN THE WRITTEN SIGNED AGREEMENT ENTERED INTO BY ARRIS
INTERNATIONAL, INC. ("ARRIS") AND PURCHASER ("PURCHASER"), USE OF
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FULL REFUND. USE OF THE SOFTWARE CONSTITUTES ACCEPTANCE OF THE
TERMS HEREOF. 1. LICENSE TERMS Subject to the terms of this License
Agreement, ARRIS International, Inc. (ARRIS) grants to Purchaser a
perpetual, royalty-free, non-exclusive, non-transferable (except as
set forth in Section 9.2) non-sub-licensable right and license to
use the Cadant C4 CMTS Software (the Software) in connection with
the Cadant family of products (the System), in binary object code
form only. Purchaser may use any third party software products or
modules supplied by ARRIS solely with the Software, unless the
licensing terms of the third party software products or modules
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Software performance benchmarks to any third party without ARRIS'
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specifically granted to Purchaser herein are retained by ARRIS. 2.
RESTRICTIONS Purchaser shall not, and shall not authorize any third
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ARRIS; (iv) export the Software or any of its underlying technology
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regulations or (v) use the Software other than in connection with
the System.
2005 ARRIS All rights reserved.
3. USE The right to use the Software, or any individual feature
thereof, may be restricted by a measure of usage of applications
based upon the number of devices, subscribers, or some similar
measure. An expansion beyond a commercially reasonable usage level
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EVEN IF ARRIS AND/OR ITS LICENSORS HAVE BEEN ADVISED OF THE
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LIABILITY TO PURCHASER ARISING OUT OF OR PURSUANT TO THIS LICENSE
AGREEMENT EXCEED THE AMOUNT PAID BY PURCHASER TO ARRIS FOR THE
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this License Agreement upon fifteen (15) days prior written notice
based on Purchaser material breach of this License Agreement if
such breach is not cured within such fifteen (15) day period.
Notwithstanding the foregoing, this License Agreement shall
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licensors. 9. MISCELLANEOUS. 9.1 If any term, condition, or
provision in this License Agreement is found to be invalid,
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conditions and provisions will continue to be valid and enforceable
to the fullest extent permitted by law. 9.2 Neither this License
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Agreement
2005 ARRIS All rights reserved.
will be binding upon and will inure to the benefit of the
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License Agreement (including any addenda hereto signed by both
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hereby agree and submit to the personal jurisdiction and venue
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2005 ARRIS All rights reserved.
Table of Contents
1
About This ManualIntended Audience Prerequisite Skill and
Knowledge Purpose Conventions Used in this Document Admonishments
Textual Conventions How to Contact Us 1-1 1-2 1-2 1-2 1-2 1-3
1-4
2
C4 CMTS FeaturesDOCSIS 2.0 Compliance Fault Detection and
Recovery Interfaces and Protocols Security Features IP Filtering
Options C4 CMTS Feature Descriptions by Software Release Feature
Descriptions 2-1 2-2 2-3 2-3 2-3 2-4 2-8
3
C4 CMTS SpecificationsNetwork Diagram C4 CMTS Specifications RF
Electrical Specifications Maximum Density Scalability 3-3 3-4 3-6
3-7 3-7
Release 4.2, Standard
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C4 CMTS
VoIP Call Capacities
3-8
4
C4 CMTS Power RequirementsComponents of the Power System Power
Protection Description 4-1 4-3
5
Installation RequirementsSafety Precautions Lifting Safety
Electrical Equipment Guidelines Electrostatic Discharge (ESD)
Preventing Electrostatic Discharge Damage Installation Checklist
Tools Required Items Not Supplied Unpacking the C4 CMTS Module
Protection Installation Considerations Rack Mounting Chassis
Placement Power Requirements Cooling Requirements 5-2 5-2 5-3 5-3
5-3 5-4 5-4 5-5 5-6 5-7 5-7 5-7 5-7 5-8 5-8
6
Installing Modules and System Bring-upIntroduction Main Hardware
Components Module Types and Chassis SlotsFront View Chassis Rear
View Recommended Order for Installing Chassis Components
Recommended Chassis Unloading Order Grounding the Chassis Rack
Mounting the C4 CMTS Power Conditioning Module (PCM) and Cabling
6-2 6-2 6-3 6-4 6-6 6-7 6-7 6-8 6-9
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Table of Contents
Power Protection Description Fan Modules and Cooling Air Filter
Installing Modules in the C4 CMTS System Control Module (SCM)
Fabric Control Module (FCM) Overview Fast Ethernet Network Access
Module (NAM) Overview Gigabit Ethernet Network Access Module
Overview Cable Access Module (1Dx8U CAM) Overview Cable Access
Module (2Dx12U CAM) Overview Initial System Configuration Overview
How to Set the SCM IP Address Using a Terminal Emulator
6-10 6-12 6-17 6-17 6-21 6-28 6-29 6-31 6-32 6-34 6-35 6-41 6-42
6-46 6-47 6-51 6-51 6-52
7 8
Clock Synchronization Protocol Host Names, User IDs, and
Password RecoveryHow to Administer the Host Name and User IDs How
to Add and Delete Users Password Recovery 8-1 8-2 8-4
9
NAM ConfigurationFast Ethernet Network Access Module (NAM)
Configuration Gigabit Ethernet Network Access Module (GigE NAM)
Configuration NAM-Side IP Interface Bundling 9-2 9-4 9-7
10
Basic CAM Configuration1Dx8U CAM 10-2
Release 4.2, Standard
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C4 CMTS
2Dx12U CAM Rules and Restrictions for 2Dx12U CAM Configuration
Basic Command Set for Bringing Up a 2Dx12U Migration from 1Dx8U
CAMs to 2Dx12U CAMs Measuring SNR in the 2Dx12U CAM Clone Group
Configuration Clone Group Configuration Recommendations Clone Group
Operation Details Sample Clone Group Configurations
Inter-MAC-Domain Clone Groups Modulation Profiles Adjusting Channel
Settings in Response to Increased CM Scaling FlexCAM Hitless CAM
Sparing Overview Configure Sparing Groups Example Interface
Bundling
10-4 10-4 10-7 10-13 10-23 10-27 10-28 10-29 10-30 10-31 10-32
10-40 10-41 10-41 10-43 10-47
11 12
Control Complex Redundancy Configuring Router
FunctionalityInterface Configuration Common Interface Configuring
Commands Monitoring Interfaces Subinterfaces (Multiple VRIs per
VRF) Routing Information Protocol, version 2 (RIP2) Open Shortest
Path First (OSPF) OSPF Graceful Restart Loopback Interfaces for
Routing Protocols Dynamic Route Redundancy Configuring IP Routes
Route Redistribution Multicast Operations in the C4 CMTS IGMP
Implementation 12-1 12-1 12-3 12-5 12-9 12-15 12-19 12-21 12-25
12-26 12-27 12-28 12-30
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Table of Contents
13
IP Packet Filtering, Throttling, and CAROverview of IP Packet
Filtering Subscriber Filters Setting Default Filter Groups Debug IP
Packet Capture Packet Throttling Committed Access Rate Global Rate
Smoothing for TCP Traffic Feature 13-2 13-5 13-10 13-15 13-17 13-19
13-23
14 15
Service Class Names Authentication, Authorization, and
Accounting (AAA)AAA Feature Servers and Server Groups Secure Shell
Protocol (SSH2) In-Band Management with ACLs Routing to a Null
Interface Source Verification of Cable-side IP Addresses Upstream
Load Balancing (ULB) DSx DQoS VoIP on the C4 CMTS C4 CMTS Advanced
CM Configuration File Verification 15-2 15-5 15-14 15-22 15-24
15-25 15-27 15-29 15-31
16
PacketCable ServicesPacketCable 1.x Overview PacketCable
Multimedia Overview Configuration Procedures IKE and IPSec
Configuration PacketCable Settings PC1.x Electronic Surveillance
Electronic Surveillance Configuration Electronic Surveillance
Logging Messages Running in a non-PacketCable Compliant Voice
Environment 16-1 16-5 16-9 16-10 16-21 16-32 16-33 16-34 16-35
Release 4.2, Standard
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C4 CMTS
Working with non-ARRIS MTAs in a non-PacketCable Compliant Voice
System Working with ARRIS MTAs in a non-PC1.x Compliant System
Converged Services
16-35 16-36 16-38
17
Baseline Privacy Interface (BPI)Baseline Privacy Overview
Baseline Privacy Operational Overview Baseline Privacy Setup
Initial CMTS Base Table Setup BPI Initialized State Configuration
Settings. Encrypted Multicast Setup Digital Certificates (BPI+
Only) Provisioning BPI X.509 Certificates Using Import/Export
Commands Provisioning BPI X.509 Certificates Using CLI Commands
Baseline Privacy Debugging Explanation of BPI Trap Codes CLI
Commands for Baseline Privacy Configure Cable Command Show Cable
Command Configure Interface Cable Command Show Interface Cable
Command 17-1 17-2 17-4 17-4 17-9 17-10 17-14 17-15 17-17 17-20
17-24 17-28 17-28 17-29 17-30 17-32
18
DOCSIS Set-top Gateway (DSG) ConfigurationOverview and
Definitions Configuration Procedures Initial Configuration DSG
Configuration Advanced DSG Configuration DS Cable Interface DSG
Tunnel DSG Classifier DSG Configuration Scenarios Initial Setup for
DSG 18-2 18-4 18-5 18-7 18-9 18-11 18-14 18-18 18-18 18-18
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DSG Configuration Only Multicast Destination IP to RFC1112 DSG
Tunnel MAC Multicast Destination IP to non-RFC1112 DSG Tunnel MAC
Unicast Destination IP
18-20 18-20 18-23 18-25
19 20
Downstream Cable Parameters Upstream Modulation Parameters and
ProfilesDifferences Between the 1Dx8U and 2Dx12U Default Modulation
Profiles Modulation Profiles: Default and User-defined 20-10
20-11
21 22
SNMP Configuration with CLI Flash Disk DescriptionOverview
Virtual System Controller File System Administration File Transfers
Hitless Reload/Upgrade Feature 22-1 22-4 22-5 22-7 22-9
23
Logging and the C4 CMTSEvent Messages How Event Messages Are
Routed Event Management Subsystems Event Message Throttling Show
Logging Commands Configuring Event Throttling Configuring Event
Routing Generating Events and Traps SNMP Trap Examples Routing
Events to Local Volatile and Non-Volatile Logs Displaying Events on
the System Console Routing Events to the Monitor Routing Events to
the History Log 23-1 23-2 23-3 23-4 23-5 23-9 23-11 23-15 23-16
23-17 23-18 23-19 23-20
Release 4.2, Standard
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C4 CMTS
Logging OSPF Event Messages
23-21
24
DiagnosticsDiagnostic User Interfaces 24-2
25
CLI OverviewAccess Levels and Modes CLI Command Modes CLI Syntax
Conventions Designating MAC addresses and IP addresses Keyboard
Shortcuts CLI Command Features CLI Help Feature CLI Filtering How
to Use CLI Filtering 25-2 25-2 25-5 25-6 25-6 25-7 25-8 25-15
25-15
26 27
CLI Command Descriptions Standard and Cadant Enterprise MIBsCMTS
SNMP MIB Variable Descriptions Enterprise MIBs 27-2 27-3
8
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List of Features and Fixes for 4.2
Advanced CM Configuration File Verification (TFTP Enforce)
Associate ACL with SNMP Community String CLI - clear crypto sa CLI
- configure cable dsg client-id-list CLI - configure cable dsg
tunnel CLI - configure cable dsg ds-frequency-list CLI - configure
cable dsg timer-list CLI - configure cable dsg tunnel classifier
CLI - configure cable dsg vsp-list CLI - configure cable filter
group index log CLI - configure crypto dynamic-map
15-31 21-1 26-21 26-71 26-77 26-73 26-75 26-78 26-80 26-82
26-131
CLI - configure crypto dynamic-map ipsec-isakmp match address
26-132 CLI - configure crypto dynamic-map set peer 26-133
CLI - configure crypto dynamic-map set security-association
lifetime 26-134 CLI - configure crypto dynamic-map set
transform-set 26-135 CLI - configure crypto ipsec
security-association lifetime seconds CLI - configure crypto ipsec
transform-set CLI - configure crypto ipsec transform-set
authentication CLI - configure crypto ipsec transform-set
encryption CLI - configure crypto ipsec transform-set mode 26-145
26-137 26-138 26-139 26-140
Release 4.2, Standard
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List of Features and Fixes for 4.2
C4 CMTS
CLI - configure crypto isakmp enable CLI - configure crypto
isakmp key CLI - configure crypto isakmp local-address CLI -
configure crypto isakmp policy CLI - configure crypto key export
CLI - configure crypto key generate CLI - configure crypto key
import CLI - configure crypto key zeroize CLI - configure crypto
map ipsec-isakmp CLI - configure crypto map ipsec-isakmp dynamic
CLI - configure crypto map ipsec-isakmp match address CLI -
configure crypto map ipsec-isakmp set peer
26-141 26-142 26-143 26-144 26-145 26-146 26-147 26-148 26-149
26-150 26-151 26-152
CLI - configure crypto map ipsec-isakmp set security-association
lifetime seconds 26-153 CLI - configure crypto map ipsec-isakmp set
transform-set CLI - configure interface cable / cable downstream
dsg dcd-enable CLI - configure interface cable / cable downstream
dsg ds-frequency-list CLI - configure interface cable / cable
downstream dsg no CLI - configure interface cable / cable
downstream dsg timer-list CLI - configure interface cable / cable
downstream dsg vsp-list 26-154 26-176 26-178 26-179 26-180
26-183
CLI - configure interface cable / cable dynamic-secret 26-209
CLI - configure interface cable / cable tftp-enforce 26-231
CLI - configure interface fastethernet / ip access-group 26-319
CLI - configure interface gigabitethernet / ip access-group 26-363
CLI - configure ip filter group index log CLI - configure ip ssh
ciphers CLI - configure ip ssh idle-timeout 26-424 26-433
26-434
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List of Features and Fixes for 4.2
CLI - configure ip ssh login CLI - configure ip ssh
max-auth-fail CLI - configure ip ssh password-auth CLI - configure
ip ssh password-auth-req CLI - configure ip ssh port CLI -
configure ip ssh port-forwarding CLI - configure ip ssh
public-key-auth CLI - configure ip ssh public-key-auth-first CLI -
configure ip ssh public-key-auth-req CLI - configure ip ssh restart
CLI - configure ip ssh shutdown CLI - configure packetcable CLI -
configure packetcable dqos shutdown CLI - configure packetcable
dqos timer CLI - configure packetcable pcmm shutdown CLI -
configure packetcable pcmm timer t1 CLI - configure packetcable
throttle CLI - configure snmp-server community CLI - reload hitless
CLI - show cable dsg CLI - show cable dsg client-id-list CLI - show
cable dsg ds-frequency-list CLI - show cable dsg timer-list CLI -
show cable dsg tunnel CLI - show cable dsg tunnel classifier CLI -
show cable dsg tunnel-group CLI - show cable dsg vsp-list CLI -
show crypto dynamic-map [tag ] CLI - show crypto ipsec sa
26-435 26-436 26-437 26-438 26-439 26-440 26-441 26-442 26-443
26-444 26-445 26-480 26-481 26-482 26-489 26-490 26-491 26-553
26-620 26-642 26-646 26-648 26-650 26-653 26-654 26-652 26-655
26-727 26-728
Release 4.2, Standard
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List of Features and Fixes for 4.2
C4 CMTS
CLI - show crypto ipsec security-association lifetime CLI - show
crypto ipsec transform-set [tag ] CLI - show crypto isakmp CLI -
show crypto isakmp policy CLI - show crypto isakmp sa CLI - show
crypto map [tag ] CLI - show interface cable / cable downstream dsg
dcd CLI - show interface cable [/] cable downstream dsg CLI - show
interface cable [/] cable downstream dsg verbose CLI - show
interface fastethernet / access-group CLI - show interface
gigabitethernet / access-group CLI - show ip ospf interface [brief]
(PROD 70427) CLI - show ip ssh CLI - show ip ssh config CLI - show
packetcable global CLI - show packetcable global dqos CLI - show
packetcable global pcmm CLI - show packetcable transactions CLI -
show snmp community CLI - show ssh host public-key CLI - trace
logging packetcable Configuration File for Combined Voice and Data
on the Same Upstream Debug IP Packet Capture DOCSIS Set-top Gateway
Measuring SNR in the 2Dx12U CAM PacketCable Multimedia Overview
Power levels for upstream channels on the same physical CAM
connector.
26-732 26-733 26-734 26-735 26-736 26-738 26-761 26-758 26-760
26-785 26-786 26-817 26-829 26-830 26-864 26-866 26-867 26-868
26-896 26-831 26-965 16-38 13-15 18-1 10-23 16-5 10-4
PROD 60544 Sample output of "show cable modem detail" command
updated to show CM capability and operation. Needed for DOCSIS 2.0.
17-21
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C4 CMTS
List of Features and Fixes for 4.2
PROD 64234 Power levels for upstream channels on the same
physical CAM connector. PROD 65114 PacketCable Compliance Updated
PROD 65842 DCDs configured on a per-interface basis, not for entire
cable bundle PROD 66221 Problem with SCN params and DSG tunnels
10-4 16-4 18-5 18-15
Release 4.2, Standard
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List of Features and Fixes for 4.2
C4 CMTS
vi
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List of Figures
3
C4 CMTS SpecificationsFigure 3-1: Figure 3-2: The C4 CMTS (front
view) Typical Cable Data Network Architecture 3-2 3-3
4
C4 CMTS Power RequirementsFigure 4-1: Figure 4-2: Figure 4-3:
Figure 4-4: Figure 4-5: C4 CMTS Front Access Panels LED and Power
Bus Switches C4 CMTS Power Feeds (chassis rear) Second Level -
Internal Branch Fusing Power Control Button 4-2 4-3 4-4 4-5 4-6
5
Installation RequirementsFigure 5-1: Internal Air Flow (side
view) 5-9
6
Installing Modules and System Bring-upFigure 6-1: Figure 6-2:
Figure 6-3: Figure 6-4: Figure 6-5: Figure 6-6: Figure 6-7: Front
View of C4 CMTS C4 CMTS Chassis (rear view) Example of Old and New
Front Filler Panels Location of Grounding Terminals Installing the
Power Control Module (PCM) Cabling the PCM Example of Normal Speed
Fan Module 6-3 6-5 6-6 6-8 6-10 6-11 6-13
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Figure 6-8: Figure 6-9:
Example of High Speed Fan Module Installing the Fan Module
6-14 6-15 6-16 6-18 6-19 6-21 6-26 6-27 6-28 6-31 6-34 6-37 6-38
6-41 6-46 6-52 6-55
Figure 6-10: Air Flow Through the Chassis Figure 6-11:
Installing the System Control Module Figure 6-12: Release Locking
Latches in Order to Remove Module Figure 6-13: System Control
Module (SCM) and PIC Figure 6-14: View of Pin-out of Rollover Cable
Figure 6-15: Connecting the Console Port to a PC Figure 6-16:
Fabric Control Module (FCM) and Filler Panel Figure 6-17: FastE NAM
and PIC Figure 6-18: GigabitEthernet Network Access Module (GigE
NAM) and PIC Figure 6-19: Gigabit Interface Converters (GBICs)
Figure 6-20: Installing the GBIC Figure 6-21: 1Dx8U Cable Access
Module (CAM) and PICs Figure 6-22: 2D12U Cable Access Module (CAM)
and PIC Figure 6-23: Opening a Terminal Session on the C4 CMTS
Figure 6-24: Sample Bootloader Dialog
79
NAM ConfigurationFigure 9-1: Block Diagram of NAM-Side IP
Interface Bundling 9-7
10
Basic CAM ConfigurationFigure 10-1: One Way to Migrate Two 1Dx6
CAMs onto One 2Dx12U (example) 10-15
Figure 10-2: Migration Example: from 12 Upstreams on Two 1D/6U
CAMs to One 2Dx12U 10-16 Figure 10-3: Two Examples of Slot
Configuration after Migrating to 2Dx12U CAMs Figure 10-4: Network
Example Each CM Sees Multiple Downstreams Figure 10-5: Example of
CAM Sparing Groups 10-17 10-31 10-43
12
Configuring Router FunctionalityFigure 12-1: Example of Packet
Flow Using Loopback Interface 12-23
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List of Figures
115
Authentication, Authorization, and Accounting (AAA)Figure 15-1:
AAA Security Model 15-3
16
PacketCable ServicesFigure 16-1: PacketCable Network Reference
Architecture Figure 16-2: Foundations of PCMM Architecture Figure
16-3: Network Diagram of PCMM Implementation 16-3 16-6 16-8
Figure 16-4: An Example of Classification for PacketCable 1.x In
a Combined Voice and Data Environment 16-40
17
Baseline Privacy Interface (BPI)Figure 17-1: Example of Baseline
Privacy Base Table 17-5
18
DOCSIS Set-top Gateway (DSG) ConfigurationFigure 18-1: Logical
devices in a DSG system Figure 18-2: Block Diagram of an Advanced
DSG Configuration 18-2 18-10
22
Flash Disk DescriptionFigure 22-1: Flash Disk Partition
Structure 22-2
23
Logging and the C4 CMTSFigure 23-1: Event Management Subsystems
on the C4 CMTS Figure 23-2: Show Logging Output Example Figure
23-3: Show Logging Throttle Output Example Figure 23-4: Show
Logging History Output Example Figure 23-5: Show Logging History
Last 10 Output Example Figure 23-6: Help Configure Logging Trap
Output Example Figure 23-7: Show Logging Local Output Example 23-3
23-7 23-8 23-8 23-9 23-16 23-18
24
DiagnosticsFigure 24-1: C4 CMTS Diagnostic Software 24-3
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Figure 24-2: CLI Output for Diagnostics Figure 24-3: Show
Logging History Output Example (partial) Figure 24-4: Example of
System Output for a Module that Failed Diagnostics
24-12 24-13 24-14
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List of Procedures
6
Installing Modules and System Bring-upProcedure 6-1 Procedure
6-2 Procedure 6-3 Procedure 6-4 Procedure 6-5 Procedure 6-6
Procedure 6-7 Procedure 6-8 Procedure 6-9 How to Rack Mount the C4
CMTS How to Install the Power Conditioning Modules (PCMs) How to
Cable the PCM How to Install the Fan Modules How to Install the SCM
How to Install the SCM Physical Interface Card (PIC) How to Cable
the SCM How to Install the FastE NAM How to Install the GigE NAM
6-8 6-10 6-11 6-15 6-24 6-24 6-26 6-33 6-35 6-35 6-38 6-39 6-44
6-44 6-52 6-54
Procedure 6-10 How to Install the GigE NAM Physical Interface
Card (PIC) Procedure 6-11 How to Install the GBICs Procedure 6-12
How to Remove a GBIC Procedure 6-13 How to Install the CAM
Procedure 6-14 How to Install the CAM Physical Interface Card (PIC)
Procedure 6-15 How to Open the Terminal Emulator Session Procedure
6-16 How to Modify Boot Parameters
7
Clock Synchronization ProtocolProcedure 7-1 Procedure 7-2 How to
Configure a Time of Day (TOD) Clock Protocol How to Choose Network
Time Protocol (NTP) for C4 CMTS 7-1 7-2
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List of Procedures
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8
Host Names, User IDs, and Password RecoveryProcedure 8-1
Procedure 8-2 Procedure 8-3 How to Configure a Host Name and
Logging Host IP Address How to Configure Privilege Levels and
Authentication How to Enable Password Recovery Using Application
Dialog 8-1 8-2 8-4
9
NAM ConfigurationProcedure 9-1 Procedure 9-2 Procedure 9-3
Procedure 9-4 How to Configure a Network Access Module How to Take
a NAM Out of Service and Delete Its Slot How to Configure a Gigabit
Ethernet Network Access Module How to Take a GigE NAM Out of
Service and Delete Its Slot 9-3 9-4 9-5 9-6
10
Basic CAM ConfigurationProcedure 10-1 How to Create and Enable a
1Dx8U CAM Procedure 10-2 Example of Growing and Enabling a 2Dx12U
CAM with Logical Channels Procedure 10-3 Migrating from a 1Dx8U
Chassis to a 2Dx12U Chassis Procedure 10-4 How to Align IM
Opportunities for Clone Groups Procedure 10-5 How to Create and
Apply a Modulation Profile to an US Port Procedure 10-6 How to
Configure an Upstream (US) Channel Procedure 10-7 How to Activate a
CAM Procedure 10-8 How to Take a CAM Out of Service and Delete Its
Slot Procedure 10-9 Configuring the Two Sparing Groups Shown in the
Example Procedure 10-10How to Fail Back Manually Procedure 10-11How
to Delete a CAM Sparing Group Procedure 10-12How to Create
Interface Bundles Procedure 10-13How to Remove Interface Bundles
10-3 10-9 10-18 10-29 10-33 10-34 10-39 10-39 10-43 10-45 10-46
10-47 10-48
11
Control Complex RedundancyProcedure 11-1 How to Add a Control
Complex (Change from Simplex to Duplex) Procedure 11-2 How to
Change a Control Complex from Duplex to Simplex 11-2 11-3
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List of Procedures
12
Configuring Router FunctionalityProcedure 12-1 How to Monitor
Interfaces Procedure 12-2 How to Enable Single Key Authentication
Procedure 12-3 How to Enable Multiple Key Authentication (i.e., Key
Chains) Procedure 12-4 How to Enable OSPF Procedure 12-5 How to
Disable OSPF for an Interface Procedure 12-6 How to Disable OSPF
(Globally) on the C4 CMTS Procedure 12-7 How to Add/Delete/View a
Static IP Route to the C4 CMTS Procedure 12-8 How to Enable
Multicast on a Cable Interface 12-3 12-13 12-14 12-16 12-18 12-18
12-26 12-31
13
IP Packet Filtering, Throttling, and CARProcedure 13-1 How to
Add Filters to the CMTS 13-6
15
Authentication, Authorization, and Accounting (AAA)Procedure
15-1 Setting up SSH on the C4 CMTS Procedure 15-2 PuTTY, SSH,
Public Key Authentication 15-17 15-17
23
Logging and the C4 CMTSProcedure 23-1 How to Route Events to the
Console Procedure 23-2 How to Route Events to the Monitor Procedure
23-3 How to Configure the History Log 23-18 23-19 23-20
24
DiagnosticsProcedure 24-1 How to Restore Modules into Service
24-4
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1. About This Manual
TopicsIntended Audience Prerequisite Skill and Knowledge Purpose
Conventions Used in this Document How to Contact Us
Page1 2 2 2 4
In response to emerging IP-based data and voice services, ARRIS
brings to market a next-generation, carrier-class Cable Data
Network Solution the Cadant C4 Cable Modem Termination System
(CMTS). As of April 2005, there were more than 700 C4 CMTSs on four
continents supporting 3.7 million subscribers. The C4 CMTS has been
designed to meet the needs of the Multiple System Operator (MSO) in
terms of system density, wire-speed performance, and reliability.
The C4 CMTS enables MSOs to bundle high-speed data, voice,
full-motion video, and other multimedia content to residential and
business customers.
Intended AudienceThis document is intended for MSO technical
support personnel who are responsible for integrating, operating,
and maintaining the C4 CMTS.
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1 About This Manual
Prerequisite Skill and KnowledgeThis document serves as an
introduction to the C4 CMTS for all administrators and users of
cable modem termination systems. Ideally, users of this
documentation and equipment should have a basic knowledge of the
following: RF measuring equipment Provisioning servers Command Line
Interface (CLI) RF cable plant and operating methods
PurposeThis document provides a comprehensive view of the C4
CMTS including reference and procedural information required to
manage and control the C4 CMTS.
Conventions Used in this DocumentThis section presents the
textual conventions used in this documentation set.
AdmonishmentsThere are three levels of admonishments used in
this documentation. The first is a simple note. NOTE Notes are
intended to highlight additional references or general information
related to a procedure, product, or system. The international
symbols, Caution and Warning, appear in this book when you must
perform procedures involving risk.
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CAUTION
Cautions indicate risk of dropping traffic, losing data, or
damaging equipment. Read the accompanying instructions and proceed
with caution.
WARNINGThe warning symbol represents a risk of bodily injury or
serious damage to the equipment. Before you work on any equipment,
be aware of the hazards involved with electrical circuitry and
fiber optics and follow standard procedures for preventing
accidents and serious damage.
Textual ConventionsThe conventions used in this guide are shown
in the following table: Table 1-1: Examples of Textual Conventions
Type of text CLI commands and other user input Names of chapters
and manuals Menu selections System responses and screen display
Description Monospaced bold (courier) Example configure slot type
NAM chapter 1, AboutThis Manual From the File>Set-up menu choose
Time since the CMTS was last booted: 12 days, 2: 8: 14
Italicized textPlain-faced text Monospaced font (courier)
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1 About This Manual
How to Contact UsProduct Information and Support If you have
questions about the ARRIS C4 CMTS, G2 IMS software, installation
procedures, or this guide, pleases contact your ARRIS account
representative. The Technical Support Contact information is
summarized in the following table: Table 1-2: Product Technical
Support Contacts C4 CMTS Support Information NORTH AMERICA E-mail
Toll Free Phone Worldwide Phone Hours LATIN AMERICA E-mail Phone
Hours EUROPE E-mail Phone Hours ASIA (except Japan) E-mail Phone
Hours E-mail Phone Hours E-mail Phone Hours JAPAN - Fukuoka Office
[email protected] +81 92 473.2671 9:30 am to 6 pm (09:30
to 18:00) Fukuoka local time JAPAN - Tokyo Office
[email protected] +81 (0) 3 5371.4142 9 am to 5 pm
(09:00 to 17:00) Tokyo local time [email protected] +81
(0) 3 5371.4142 9 am to 5 pm (09:00 to 17:00) Tokyo local time
[email protected] +31 23.554.3880 (English, Spanish,
French) 08:30 to 17:30 pm CET [email protected]
+56.2.369.5628 9 am to 6 pm (09:00 to 18:00)
[email protected] 1+.888.221.9797 (North America Only)
1+678.473.5656 8 am to 8 pm (08:00 to 20:00) Eastern Standard
Time
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Emergency support is available after normal business hours by
calling the same numbers listed above. Additional contact
information can be obtained from the ARRIS web page at
http://www.arrisi.com and clicking on the link to the Customer
Center. Training Information ARRIS Training is the authorized
organization for training on voice, data, and provisioning
products. Web-based, instructor-led, and customized courses are
available at our U.S. training center in Atlanta. On-site training
is available.To obtain pricing for on-site training and other
training information, visit our web site: http://www.arrisi.com
Comments on this Document Our goal has been to create a document
that best fits your needs. We are interested in your suggestions
for improving this document. You may address comments or questions
regarding this documentation directly to the Documentation and
Training Manager: Jim Morgan ARRIS Customer Documentation and
Training Manager PH: 770-622-8760 FX: 678-473-5218
[email protected]
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1 About This Manual
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2. C4 CMTS Features
TopicsC4 CMTS Feature Descriptions by Software Release Feature
Descriptions
Page4 8
This chapter introduces the C4 CMTS and its features,
functionality, and components. This chapter contains the following
topics: Descriptive and reference information Features list
DOCSIS 2.0 ComplianceIn December, 2004, the Cadant C4 Cable
Modem Termination System (CMTS) received DOCSIS 2.0 requalification
by CableLabs with the new software upgrade designed to support
DOCSIS Set-top Gateway (DSG) technology. With this qualification,
the Cadant C4 CMTS, configured with the higher density 2Dx12U CAM
provides the most reliable and scalable CMTS solution currently
available. Using it, MSOs can provide their customers with advanced
voice and high-speed data solutions.
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2 C4 CMTS Features
The Cadant C4 CMTS supports DOCSIS Set-Top Gateway (DSG),
allowing operators to transition the signaling, provisioning and
control of advanced set-top boxes from proprietary to
standards-based protocols. This transition of all services to
IP-based standards is expected to streamline operations and lower
capital costs for cable operators. The DOCSIS 2.0 standard greatly
improves performance in the upstream path of the cable network. The
growing demand for peer-to-peer file sharing, interactive gaming,
and voice over IP telephony increases the need for upstream
bandwidth. The following enhancements are available to CMTSs and
CMs that comply with the 2.0 standard while maintaining all the
DOCSIS 1.1 and 1.0 functionality: Enhanced upstream capacity
Greater maximum upstream throughput up to 30.72 mbps per channel
Greater upstream channel width up to 6.4 Mhz New upstream channel
modulation rates: 8QAM, 32QAM, and 64QAM Longer preamble to
facilitate synchronization up to 1536 bits Higher powered preamble
QPSK-1 Enhanced noise cancellation and error correction
Synchronous-Code-Division Multiple Access (SCDMA) operation along
with the standard TDMA and ATDMA techniques for combining CM
signals onto a given upstream channel.
Fault Detection and RecoveryThe C4 CMTS employs: Advanced
data-path integrity checks (parity, CRC, loopbacks, pings)
Continuous system audits Multiple levels of error detection.
Fault recovery on the C4 CMTS: Rapidly isolates faults Decreases
diagnostic and repair time Reduces the probability of fault
propagation Minimizes impact on subscriber services.
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Interfaces and ProtocolsOpen interfaces and protocols allow
seamless integration with existing network management
infrastructures. The primary protocols supported by the C4 CMTS
include the following: Simple Network Management Protocol (SNMP)
v1, v2c, and v3 DOCSIS 1.1, DOCSIS 2.0 and Cadant MIBS Command Line
Interface (CLI) File Transfer Protocol (FTP) Telnet Routing
Information Protocol (RIPv2) Open Shortest Path First (OSPFv2)
Security FeaturesUnique security measures ensure plant and
subscriber integrity through: DOCSIS 1.1 BPI+ encryption
Administrative isolation by means of a separate physical interface
Packet filtering Proxy ARP Password and key authentication for RIP
and OSPF Authentication using RADIUS Secure Shell (SSH) Access
Control Lists (ACLs) Multi-stage Denial of Service throttling
mechanisms in hardware and software TACACS+ Protocol throttling
IP Filtering OptionsThe IP filtering feature is dependent on the
subscriber management MIB.1
1. For information on the applicable standards, see the
appropriate draft documents of the Internet Engineering Task Force
at www.ietf.org. Look for the latest version of DOCSIS Subscriber
Management MIB.
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C4 CMTS Feature Descriptions by Software ReleaseThe ARRIS C4
CMTS Release 4.2 aggregated Feature Set is comprised of the
Baseline Feature Set, plus the features of software Releases 3.0,
3.3, 4.0, 4.1, and 4.2. Baseline Features The ARRIS C4 CMTS feature
set includes: Complete DOCSIS 1.1 support Maximum cable interface
density per rack unit High scalability Guaranteed Service Level
Agreements (SLAs) support IGMPv2 & Multicast Flow Support
Carrier-class availability and operation Static Layer 3 Routing
Layer 3 Router Functionality including
Release 3.0 Features
Router Information Protocol (RIPv2) Open Shortest Path First
(OSPFv2) Equal Cost Multipath Load Balancing (ECMP)
FlexCAM Technology for CAM sparing (hitless operation for
sparing groups up to 7+1) Dynamic Route Redundancy Control Complex
Redundancy
The following features were added with Release 3.0: GigE Network
Access Module (Gig-E NAM) Authentication using RADIUS Secure Shell
(SSH) In-Band Management and Access Control Lists (ACLs) Upstream
Load Balancing (ULB) Multiple syslog servers
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Release 3.3 Features
The following features or improvements have been added for
release 3.3: PacketCable Qualification Increased subscriber limits
per chassis: 24K CM Increased VoIP Call Capacities Improved
Password Recovery Loopback Interface Multiple Subinterfaces per VRF
Loopback Interfaces for routing protocols Number of filters in
group increased to 31 Support for Authentication, Authorization,
and Accounting (AAA) [RADIUS & TACACS+] In-Band Management:
Access to the SCM via the loopback IP address Support for Packet
Cable Automatic System Backup during Upgrade Improved Baseline
Privacy Interface (BPI) Domain Name System (DNS) Support for
Telnet, Traceroute, and Ping
CLI Improvements: Extended ping command show ip interface brief
show temperature reset all CMs traceroute CLI command configure
authorization COS and 1.0 Modems configure logging priority
configure privilege exec level
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2 C4 CMTS Features
Release 4.0 Features
The following features or improvements have been added for
release 4.0: 2Dx12U CAM full DOCSIS 2.0 (A-TDMA and S-CDMA)
Proprietary automatic ingress noise cancellation Flash disk
re-partitioning Graceful restart with OSPFv2 Real-time FFT of
upstream (compatible with C3 CMTS MIBs) NAM IP interface bundling
Increased subscriber limits per chassis: 32,000 CMs per chassis,
and 3,000 CMs per downstream (500 per upstream in 1x6 operation)
Preemption of normal calls by new emergency calls when BW is
limited Additional audits: FCM, file system, 2Dx12U CM reset clear
trap Flap List enhancements:
percent of station maintenance ranging opportunities that
receive a range request - number of power adjustments exceeding a
threshold Number of CRC errors per CM (2D only) Number of bytes
dropped per CM (congestion and policing) Virtual System Controller
CLI Improvements:
-
show/copy running-config show cable qos profile assign and
display in output name/description for each interface
To look up syntax and parameters for individual CLI commands,
see Chapter 26, CLI Command Descriptions. Each entry in the
alphabetical list of commands is a hyperlink to the appropriate
page in the manual. Automatic fan speed control Encrypt the MD5
shared secret for routing protocols in CLI output Disable ICMP
Unreachables OSPF "point-to-point" interface support Increased
AC/DC power solution Voice call requirements:
-
At least 1,000 MTAs per downstream At least 5,000 BHCAs with
completion rate of 99.5% At least 260 half-calls per downstream
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NOTE The voice call requirements are reduced by one-half in a
mixed voice and data environment. Release 4.1 Features The
following features or improvements have been added for release 4.1:
Release 4.2 Features Committed Access Rate Global Traffic Shaping
for TCP Traffic Remote Query of Cable Modems
The following features or improvements have been added for
release 4.2: DOCSIS Set-top Gateway (DSG) Agent Associate ACL with
SNMP Community String Advanced CM Config File Verification
Scalability 52K CMs per chassis Modify overload control to ensure
"older" CMs range/register in reasonable time through overload
conditions (chassis reboot, CAM insertion, etc.) "Debug" IP Filter
Packet Capture capability (ability to capture packet headers that
match IP filters or similar functionality) PacketCable Multimedia
Network side ACLs Support for 16 telnet sessions Clear the IP
filter counters through the CLI Hitless software update PacketCable
1.x Voice call requirements
-
MTAs /downstream (1D) 1000 MTAs/downstream (2D) 1500 MTAs/C4
20000 - Lines/downstream 1800 Lines/C4 24000 - BHCA/downstream 5000
BHCA/C4 66600 - Simultaneous half calls/downstream 260 Programmable
unicast request opportunity polling interval
NOTE The voice call requirements specifically assume that only
GNAMs are used. If the system contains any FastENAMs, the
per-chassis line and MTA limits must be reduced to 1000.
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2 C4 CMTS Features
Certain features may impact software upgrade procedures. For
more information related to upgrades or for non-conformance issues,
see the Cadant C4 CMTS Software Upgrade Notes. This file is
included on the software CD.
Feature DescriptionsIn addition to the previously described
features and functionality, the following section describes the C4
CMTS feature set. This includes: Layer 3 Router Functionality
including
Router Information Protocol (RIPv2) Open Shortest Path First
(OSPFv2) Equal Cost Multipath Load Balancing (ECMP) FlexCAM
Technology for hitless CAM sparing (hitless operation for sparing
groups up to 7+1) Dynamic Route Redundancy Control Complex
Redundancy Secure Shell In-band Management with ACLs Upstream Load
Balancing Multiple Syslog Servers
Each feature is explained in the following sections. RIPv2 RIP
is a distance vector routing protocol that learns routes
dynamically without provisioning. RIP requires little overhead and
is easy to implement. The C4 CMTS implements RIPv2. Unlike the
original version of RIP, this version supports subnet masks and
Message Digest 5 (MD5) authentication. For more information on the
standard, see Request For Comments (RFCs) 2453 and 1058. OSPFv2
OSPF is a dynamic link-state routing protocol developed by the
Internet Engineering Task Force and is published as RFC 2328.
Rather than counting the number of hops as a metric, OSPF bases its
path descriptions on link states that take into account additional
network information. OSPF also lets the user assign cost metrics to
each interface so that some paths are given preference. Equal Cost
Multipath The Equal Cost Multipath (ECMP) feature allows an
administrator to route designated traffic across multiple routes
while balancing traffic across up to four equal cost routes. If
more than four equal cost routes are learned
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by the C4, then the extra routes are not active. Each IP
datagram is examined to determine its route according to the
Destination IP address. If multiple equal cost routes are found,
the route chosen is based on the source IP address of the packet.
Assuming an even distribution of source IP addresses, the load
through the equal cost routes is balanced. FlexCAM Sparing Hitless
CAM sparing is an important element of system reliability and
greatly reduces subscriber impact and loss of traffic in the event
of CAM failure. Hitless sparing occurs when an active CAM goes down
and a spare CAM becomes active. The CMs remain on-line and do not
have to re-range and re-register. The C4 CMTS supports CAM sparing
groups up to 7+1 in size (seven active CAMs backed up by one
spare). The Dynamic Route Redundancy feature allows the C4 CMTS to
dynamically update a specific route in hardware based on a change
in the network topology. The update will only occur if a redundant
route for a specific IP prefix exists in software. A Control
Complex consists of one SCM and one FCM. In a fully equipped
chassis there are two Control Complexes, one active and one
standby. Control Complex Redundancy (CCR) ensures high reliability
for systemwide OAM&P, switching, and routing. The control
complex redundancy feature provides 1+1 active/standby redundancy
between two pairs of SCM/FCM modules. The failure of an active
SCM/FCM pair immediately causes a failover to the standby SCM/FCM
pair. Secure Shell The C4 CMTS Secure Shell protocol version 2
(SSH2) feature provides enhanced privacy and security, including:
In-Band Management with ACLs Secure encrypted connection
capabilities using an SSH2 server User authentication by internal
password External RADIUS password or user digital signatures
(public keys) Secure connections to the C4 CMTS CLI and file
systems Secure FTP (SFTP)
Dynamic Route Redundancy
Control Complex Redundancy
The C4 CMTS offers enhanced network management with controlled
access to the SCM via standard Access Control Lists (ACLs) for CMTS
administrators. This feature provides: IP connectivity to the SCM
through the client cards (NAM, GigE NAM, and CAMs), and The ability
to permit or deny access to the SCM via the client cards from
specified subnet or host addresses.
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2 C4 CMTS Features
Upstream Load Balancing
The Upstream Load Balancing (ULB) feature provides upstream load
balancing on registering CMs among upstream channels to which those
CMs are physically attached. The automatic decision to load balance
is based on a comparison of the cumulative reserved bandwidth of
upstream channels at the time a new CM is attempting to perform
initial maintenance ranging. The ULB feature is provisionable per
cable group, (i.e. a downstream channel and all associated upstream
channels that occupy the same physical cable). NOTE This feature
should not be activated for cable groups with CMs that are already
configured to connect to specific upstream channels.
Multiple Syslog Servers
The C4 CMTS has the ability to configure and send logging
messages to up to eight syslog servers (hosts).
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3. C4 CMTS Specifications
TopicsNetwork Diagram C4 CMTS Specifications RF Electrical
Specifications Maximum Density Scalability VoIP Call Capacities
Page3 4 6 7 7 8
This chapter introduces the C4 CMTS and its features and
functionality. This chapter contains the following topics:
Descriptive and reference information Physical design information
Power and electrical requirements
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3 C4 CMTS Specifications
Figure 3-1 illustrates the front view of the C4 CMTS. There are
a total of twenty-one slots for modules. There are four main types
of modules used to equip the slots in the front. These are
sometimes referred to as front cards. Smaller modules, called
Physical Interface Cards, or PICs, are inserted in each slot from
the rear of the chassis. The PICs provide physical connectors for
terminating cables from the subscriber and Internet networks.
Between the front and back slots is the midplane of the chassis.
Three C4 CMTS chassis can be mounted in a single 19-inch wide,
sevenfoot standard rack.
Figure 3-1: The C4 CMTS (front view)
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Network DiagramA cable data network system consists of cable
modems (CMs) at subscriber premises, a CMTS at the cable plant
operations area, a data-over-cable management software suite
integrated with the operator's other management systems, and the
HFC cabling that connects it all. DOCSIS defines the standard for
communication among these elements. The C4 CMTS provides data
switching functions as well as the radio frequency (RF) interface
to and from the cable plant. It also provides ethernet interfaces
to the Internet Service Provider(s). The data-over-cable management
system provides both the end-to-end network management solution and
the support for subscriber provisioning. Figure 3-2 shows a typical
cable data network architecture.
TFTP Server
TOD Server
DHCP Server
10/100 Ethernet Switch
Router
Internet
AC DC Power Converter
CMTS
CATV Network HFC Plant
Cable Modem
CPE
Figure 3-2: Typical Cable Data Network Architecture
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3 C4 CMTS Specifications
C4 CMTS SpecificationsThis section is a summary of the C4 CMTS
physical characteristics and operating specifications, and
information on compliance with regulatory standards. Physical
Mounting: Dimensions: 19- or 23-inch rack, or stand-alone Height
Width Depth 24.5" 17.4" 20.0" (622 mm) (442 mm) (508 mm) (75.5
Kg)
Power
Chassis Weight (fully equipped): 166 pounds
Operating voltage: nominal -48 VDC, range -44 to -72VDC Note:
Once powered up the C4 CMTS will continue to operate if within this
voltage range. Start-up voltage range: -44 to -67.5VDC Note: If
powered down, the C4 CMTS will not restart successfully if the
voltage is not in the range of -44 to -67.5VDC. This offset from
the operating range provides a cushion against multiple possible
power cycles. Attempted start-ups at the voltage extremes are
subject to power fluctuations that could result in multiple power
cycles and damage to the equipment. Chassis Power Consumption:
2800W maximum The -44V guaranteed operating limit translates to a
maximum current draw of 64A at 2800W.
Safety
The C4 CMTS meets the following safety standards: UL60950 (1999)
Third Edition CAN/CSA-C22.2, No. 950-95 IEC60950-1 (2001), First
Edition
Electromagnetic Compatibility
The C4 CMTS meets the following: GR-1089-CORE, Issue 3 (FCC -
Part 15, Class A) EN 300 386 v1.3.1 (CISPR 22, Class A)
Network Interfaces
The C4 CMTS is equipped with the following interfaces: 10 Base-T
(SCM Maintenance Port) 10/100 Base-T (FastE or GigabitE NAM) 1000
Base-TX, 1000 Base-SX, 1000 Base-LLX, 1000 Base-LX (GigabitE
NAM)
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Environmental
Thermal The C4 CMTS meets the following environmental standards:
NEBS GR-63-CORE, ETS 300 019
Operating temperature: Short term: -5 to +55C Long term: +5 to
+40C Non-operating temperature: -40 to +70C Operating humidity
Short term: 5 to 90%, non-condensing Long term: 5 to 85%
Non-operating humidity: 5 to 95%, non-condensing
Mechanical NEBS GR-63-CORE ETS 300 019
In-use (Class3.1E) Storage (Class 1.2) Transportation (Class
2.3)
Other NEBS Level 3 Criteria (SR-3580) Acoustic Noise
Criteria:
NEBS (GR-63-CORE) ETSI (ETS 300 753) Altitude Criteria (NEBS
GR-63-CORE) Illumination Criteria (NEBS GR-63-CORE)
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3 C4 CMTS Specifications
RF Electrical SpecificationsThe following table lists the
downstream RF electrical specifications. Table 3-1: Downstream RF
Electrical Specifications Center frequency range: North America
Europe Frequency step size Modulation types Annex B symbol rates in
Msym/sec Annex A symbol rate in Msym/sec Raw bit rate: Annex B
64QAM 256QAM) Raw bit rate: Annex A 64QAM 256QAM) Output signal
range Return loss Transmit output power accuracy Output impedance
91 - 857 MHz 112 - 858 MHz 250 kHz 64QAM, 256QAM 64QAM: 256QAM:
64QAM or 256QAM: 30.342 Mbps 42.884 Mbps 41.712 Mbps 55.616 Mbps
50-61 dBmV < 14 dB in-band Adjustable to within +/-.5 dB 75
5.056941 5.360537 6.952
The following table lists the upstream RF electrical
specifications. Table 3-2: Upstream RF Electrical Specifications
Upstream frequency band: North America Europe Japan RF channel
spacing Modulation types Raw bit rate Forward error correction 5 -
42 MHz 5 - 65 MHz 5 - 55 MHz < 1 kHz Type 4 TLVa: QPSK, 16QAM
Type 5 TLV: QPSK, 8QAM, 16QAM, 32QAM, and 64QAM 30.72 Mbps max
Reed-Solomon (T = 1-16)
a. Type-Length-Value (TLV) 4 or 5 are codes used in UCD messages
to indicate DOCSIS 1.x or 2.0 compatibility, respectively.
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The following is a list of receiving input levels for upstream
channels: Table 3-3: Receiving Input Levels for Upstream Channels
Channel Width (kHz) 200 400 800 1600 3200 6400 Symbol Rate
(ksm/sec) 160 320 640 1280 2560 5120 Maximum Range (dBmV) -16 to
+14 -13 to +17 -10 to +20 -7 to +23 -4 to +26 -1 to +29
Maximum DensityThe C4 CMTS supports both small and large scale
subscriber deployments. The C4 CMTS chassis supports up to 32
downstream channels and 192 upstream channels. Up to three chassis
can be installed in a standard 7-foot high, 19-inch wide frame. A
fully configured rack supports a maximum of 96 downstream and 576
upstream channels. Operating ratios of downstream to upstream
channels range from 1:1 to 1:12, assuming use of the 2Dx12U Cable
Access Module.
ScalabilityARRIS offers a number of combinations of downstream
to upstream channel ratios to improve scalability. With the ability
to accommodate many configurations, the CMTS can grow to meet
evolving subscriber traffic considerations along with reducing
inter-shelf cabling. This leads to lower cost for installation,
operations, and maintenance. Using multiple NAM ports within one
CMTS chassis enables use of dynamic route redundancy. This allows
an MSO to set multiple routes to a single destination. These routes
can be provisioned on different NAM ports with different weights,
thus providing a NAM redundancy strategy.
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3 C4 CMTS Specifications
A fully equipped C4 CMTS chassis offering basic service will
provide reasonable performance up to the following suggested
subscriber limits: 52,000 CMs per chassis 128,000 ARP cache entries
128,000 Destination IP entries (using GigE NAM) 3,000
CMs/downstream (whether 1Dx8U or 2Dx12U CAM) Up to 500 CMs for each
upstream of a 2Dx12U CAM configured for 1Dx6U service.
VoIP Call CapacitiesThe following Voice over Internet Protocol
hardware and call limits apply to C4 CMTSs configured for DSx/DQoS
VoIP or PacketCable voice. The Multimedia Terminal Adapter (MTA) is
a telephony modem: MTAs per downstream (1D): MTAs per downstream
(2D): MTAs per C4 CMTS: Lines per downstream Lines per C4 CMTS:
1,000 1,500 20,000 1,800 24,000
Busy Hour Call Attempts (peak 60-minute call loads supported)
BHCA per downstream: BHCA per C4 CMTS: Simultaneous
half-calls/downstream The assumptions for the call load are: Lines
per sub.: Centi-Calls per Second (CCS) per line: Hold time: Call
Completion Rate: 1.2 5 180 seconds 99.5% 5,000 66,600 260
These limits specifically assume that only GigE NAMs are used.
If the system contains any FastE NAMs, the per-chassis line and MTA
limits must be reduced to 10,000. These limits also depend on the
following: MTAs/lines are distributed evenly across 4 upstreams per
downstream 256QAM downstream 16QAM upstream 3.2 MHz upstream
channel width Upstreams 0-5 on MAC domain 0; upstreams 6-11 on MAC
domain 1
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4. C4 CMTS Power Requirements
TopicsComponents of the Power System Power Protection
Description
Page1 3
The C4 CMTS requires two -48V power feeds, named A and B. The
source can be an external battery plant or independent AC/DC power
supplies. In the event the A or B feed fails or is removed from
service for maintenance, the other feed continues to supply power
to the C4 CMTS with no interruption in service. NOTE Review the
total current consumption of all equipment on the same line before
supplying power to the C4 CMTS. Avoid sharing a power source that
requires large currents.
Components of the Power SystemPower is filtered and conditioned
by a Power Conditioning Module (PCM) for each feed. The PCM
contains the power input connector, main breaker, and all active
circuitry for power distribution over a power bus.
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4 C4 CMTS Power Requirements
The PCM: Soft starts the chassis on power up Filters noise and
power disturbances from the power feeds Monitors the power draw of
the chassis and shuts down a branch circuit in the event of a power
fault
Each PCM is removable and can be replaced without interrupting
power to the C4 CMTS in a duplex power configuration.
Front Panel Access
Protective panels mounted on the front of the chassis flip open,
as illustrated in Figure 4-1. The top single panel flips up to
reveal the power panel and power LEDs. The mid and lower matching
panels flip open to allow access to the ejector clips for the front
modules. Another small panel is found beneath the lower matching
pane. The chassis slot numbers are printed on it; it flips down to
allow access to the air filter.
Access to Power Panel
Power Panel
Access to Modules Modules
Air Filter Fan Modules
Figure 4-1: C4 CMTS Front Access Panels
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Figure 4-2 shows the LEDs and power switches for Buses A and B.
The system alarm and power indicator LEDs are in the middle of this
panel.SYSTEM ALARMS
CRITICAL
ON OFF/ FAIL A B C D
MAJOR
ON OFF/ FAIL A B C D
MINOR
POWER
Figure 4-2: LED and Power Bus Switches
Power Protection DescriptionThe C4 CMTS chassis power
configuration consists of three levels of protection: A and B power
feeds controlled by circuit breaker in the PCM Internal chassis
branch fuses located in the PCM Fuses located on the front modules
(These fuses are not field replaceable)
The C4 CMTS must be installed only by trained service personnel
who are familiar with the precautions required when working in a
48V DC power delivery environment. Power requirements are listed in
C4 CMTS Specifications on page 3-4.
A and B Power Feeds
Power is supplied to the C4 CMTS via A and B feeds located at
the rear of the unit. The power feeds are protected by two 70-amp
breakers located on the rear of the chassis, shown in Figure 4-3.
This is the first level of protection.
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4 C4 CMTS Power Requirements
They also serve as the master disconnect switch for the unit.
The breakers protect the high current-carrying cables within the C4
CMTS and the power connectors located at the rear of the unit.
POWER CABLE B
POWER CABLE A
Breaker switch for Power Module B
Breaker switch for Power Module A
Figure 4-3: C4 CMTS Power Feeds (chassis rear)
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Internal Branch Protection
Each A and B power feed is further divided into four internal
chassis distribution branches, A through D. Each of these branches
is protected by a 20-amp fuse located in the PCM. These fuses
constitute the second level of protection. They are not field
replaceable, nor can they be reset. These feeds supply power to the
C4 CMTS midplane and to all circuit modules. Power is distributed
to the twenty-one slots by the four branches as shown in Figure
4-4.SYSTEM ALARMSCRITICAL
ON OFF/ FAIL A B C D
MAJOR
ON OFF/ FAIL A B C D
MINOR
POWER
Network Access Module (NAM)
Network Access Module (NAM)
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20
Figure 4-4: Second Level - Internal Branch Fusing If, for
example, a damaged module or bent pin causes an electrical short,
the fuses protect the power distribution wiring and midplane
circuitry from damage. The entire feed for a side is turned on and
off by pressing the power control button on the power panel. Each
push of the button toggles the power from that feed (one push turns
it off, the next push turns it on).
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System Control Module (SCM)
System Control Module (SCM)
Fabric Control Module (FCM)
Cable Access Module (CAM)
Cable Access Module (CAM)
Cable Access Module (CAM)
Cable Access Module (CAM)
Cable Access Module (CAM)
Cable Access Module (CAM)
Cable Access Module (CAM)
Cable Access Module (CAM)
Cable Access Module (CAM)
Cable Access Module (CAM)
Cable Access Module (CAM)
Cable Access Module (CAM)
Cable Access Module (CAM)
Cable Access Module (CAM)
Cable Access Module (CAM)
Fabric Control Module (FCM)
4 C4 CMTS Power Requirements
In the event of a power fault on a branch: The electronic
breaker for that branch detects the failure and removes power from
that branch. A system power alarm is generated. The green power OK
LED for that branch is turned off and the corresponding red branch
power fault LED is turned on.SYSTEM ALARMS
CRITICAL
ON OFF/ FAIL A B C D
MAJOR
ON OFF/ FAIL A B C D
MINOR
POWER
Figure 4-5: Power Control Button Module (Board-level) Fuses The
third level of protection is at the module level. Each front module
(CAM, NAM, FCM, or SCM) has two fuses that protect its internal
circuitry. One fuse is located on the circuit powered by the A bus;
and the other on the circuit powered by the B bus. These on-board
module fuses are not field replaceable: if the fuse blows the
module must be returned for repair.
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5. Installation Requirements
TopicsSafety Precautions Electrostatic Discharge (ESD)
Installation Checklist Unpacking the C4 CMTS Installation
Considerations
Page2 3 4 6 7
This chapter provides the operating precautions and installation
requirements for the C4 CMTS. NOTE Do not make any mechanical or
electrical modifications to the CMTS equipment. If modified, the C4
CMTS may not meet regulatory compliance.
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5 Installation Requirements
Safety PrecautionsThis section provides safety precautions for
installing the C4 CMTS. When setting up the equipment, please
observe the following: The C4 CMTS is intended to be installed only
in restricted access areas for reasons of security and safety.
Follow all warnings and instructions marked on the equipment.
Ensure that the voltage and frequency of your power source meets or
exceeds the voltage and frequency listed on the equipments
electrical rating label. Never force objects of any kind through
openings in the equipment because dangerous voltages may be
present. Foreign objects may produce a short circuit resulting in
fire, electric shock, or damage to the C4 CMTS and other
equipment.
Lifting SafetyA fully-equipped C4 CMTS weighs approximately 166
lbs. The chassis is not intended to be moved frequently. Before
installing the C4 CMTS, ensure that your site is properly prepared.
When lifting the chassis or any heavy object, follow these
guidelines: Always disconnect all external cables before lifting or
moving the chassis. Do not attempt to lift the chassis by yourself:
have at least one other person assist you. Ensure that your footing
is solid and balance the weight of the object between your feet.
Lift the chassis slowly. Never move suddenly or twist your body as
you lift. Keep your back straight and lift with your legs, not your
back. If you must bend down to lift the chassis, bend at the knees,
not at the waist, to reduce the strain on your lower back muscles.
Lift the chassis from the bottom, grasping the underside of the
chassis exterior with both hands.
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Electrical Equipment GuidelinesFollow these basic guidelines
when working with any electrical equipment: Know where the
emergency power-off switch is located for the room in which you are
working. Disconnect all power and external cables before moving the
chassis. Do not work alone if potentially hazardous conditions
exist. Never assume that power has been disconnected; always check.
Do not perform any action that makes the equipment unsafe or might
create a potential danger to people. Examine your work area for
possible hazards such as ungrounded power extension cables, missing
safety grounds, or wet floors. CAUTION
Be sure to connect the chassis to ground before applying power
or inserting modules. An ungrounded chassis may damage
components.
Electrostatic Discharge (ESD)The C4 CMTS is designed to operate
in an area that is between 5 to 95 percent relative humidity,
non-condensing.
Preventing Electrostatic Discharge DamageElectrostatic Discharge
(ESD) can damage equipment and impair electrical circuitry. ESD
occurs when printed circuit modules are improperly handled. It may
result in module failure or intermittent problems. The C4 CMTS
contains replaceable, printed circuit modules. Modules are equipped
with a metal faceplate that features Electromagnetic Interference
(EMI) shielding and lever-action latches. Handle the modules by
their latches and avoid touching the printed circuit board and
connector pins. Although the metal faceplate helps to protect the
printed circuit modules from ESD, wear an antistatic wrist or ankle
strap whenever handling the modules or port adapters. Ensure that
the anti-ESD device makes good skin contact. The chassis is
equipped with four sockets in which you can ground plug-in wrist
straps.
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5 Installation Requirements
Installation ChecklistInstallation involves mounting the unit in
a rack, populating with client Modules and Physical Interface Cards
(PICs), attaching cables, and configuring software. Follow the
instructions in this section when installing the C4 CMTS for the
first time. Table 5-1: Installation Checklist Completed ( ) Task
Description Become familiar with component descriptions Unpack the
CMTS according to the instructions in
Unpacking the C4 CMTS on page 6
Obtain any necessary items not supplied to install the CMTS in
your configuration Prepare the site for installation in accordance
with placement and electrical considerations Install C4 CMTS in
rack Attach the grounding cable. Install the three fan modules
Install the two Power Conditioning Modules Install the Physical
Interface Modules (PICs) Install the client Modules Attach to DC
power (See Chapter 2) Attach cables Attach to an operator console
Power up the CMTS Configure the CMTS according to the instructions
in
Initial System Configuration, page 6-51.
Tools RequiredThe following tools are required for installation:
#3 Phillips screwdriver for large bolts used for attaching to frame
#2 Phillips screwdriver Digital volt meter
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Items
Not SuppliedThe following items are not included with the C4
CMTS. Obtain these items before installation: Appropriate network
cables Operator console or PC with asynchronous terminal emulation
built in Duplex filter Splitters Coax cables 48 Vdc power
supply
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5 Installation Requirements
Unpacking the C4 CMTSWhen unpacking the C4 CMTS, use the
following steps and checklist: Inspect the shipping crate before
removing the unit. If there is evidence of damage to the crate upon
receipt, request an agent of the carrier to be present before
removing the C4 CMTS. Installation is minimally a two-person
operation. Ensure the crate is right side up. Open crate and
carefully remove the packaged unit inside. Then remove the
protective foam from the unit. Remove the remaining contents of the
crate. Front modules are shipped in separate cartons. Check the
packing slip and verify its contents. If an entire C4 CMTS is
ordered, it typically ships with the following items. Use the
checklist provided below to verify that the required items are
present.
Table 5-2: Hardware Shipment Checklist ( ) One C4 CMTS chassis
One (1) chassis ground cable (green, 4 gauge, approx. 24 inches)
Two Power Conditioning Modules Two (2) power cables: one each for
power feeds A (red, 6 gauge, approx. 50 ft) and B (blue, 6 gauge,
approx. 50 ft) Modules for basic configuration (minimal
requirement): One System Control Module (SCM) and associated
physical interface card (PIC) One Fabric Control Module (FCM) One
Network Access Module (FastE NAM) or one Gigabit Ethernet Network
Access Module (GigE NAM) and associated PIC One Cable Access Module
(either a 1Dx8U or 2Dx12U CAM) and associated PIC Required
Items
Seventeen (17) front filler panels Eighteen (18) rear filler
panels (there is no PIC for the FCM) Three (3) fan modules One (1)
air filter (installed) One (1) hardware installation kit One (1)
ESD Wrist Strap One (1) rollover cable and adapter for console
connection to SCM serial port
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( ) Documentation:
Required Items (Continued) CD-ROM (standard) Paper (if
ordered)
Module ProtectionAll spare modules are shipped in reusable
anti-static shielding bags. If modules are not immediately
installed, keep them in these antistatic bags. Do not remove
modules from the antistatic bags unless properly grounded. Do not
place these bags on exposed electrical contacts or else the modules
may short circuit.
Installation ConsiderationsRack MountingThe C4 CMTS is designed
to be mounted in a standard 7-foot by 19-inch equipment rack,
compliant with EIA RS-310. A total of three chassis can be
installed in this equipment rack. Uneven mechanical loading of an
equipment rack can be hazardous. Plan the installation so that the
weight of the equipment is evenly distributed across the vertical
height of the rack. Depending on the number of modules supported,
some C4 CMTS configurations are heavier than others. Place the
heaviest units toward the bottom of the rack.
Chassis PlacementInstallation Area Select an appropriate
installation area that is dry, relatively dust free,
wellventilated, and air conditioned. Be sure the floor is capable
of supporting the combined weight of the rack with the installed
equipment.
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5 Installation Requirements
CAUTION
The C4 CMTS generates a significant amount of heat. It is
important to provide a balanced environment so the C4 CMTS performs
properly. Allow enough space around the C4 CMTS for adequate
ventilation and do not block the air vents. Inadequate ventilation
could cause the system to overheat.Clearance Allow sufficient
clearance around the rack for maintenance. If the rack is mobile,
place the C4 CMTS near a wall or cabinet for normal operation and
pull it out for maintenance (installing or moving port adapters,
connecting cables, and replacing or upgrading components). Be sure
there is enough cable length available to pull the C4 CMTS out for
repairs or adjustments if necessary.
Power RequirementsThe C4 CMTS uses dual redundant -48V power
feeds to supply electrical power to the system. The system is
capable of operating from a single feed in case one of the feeds
fails. The system consumes a maximum of 2800W of power when
equipped with the maximum number (16) of 2Dx12U CAMs. The supply
voltage should be a nominal -48V. The operating range is -44 to
-72V. The system will shut down if the voltage exceeds these
limits. The -44V guaranteed operating limit translates to a maximum
current draw of 64A at 2800W. Circuit breakers on the power feeds
should be sized accordingly. The Power Conditioning Modules in the
C4 CMTS will limit the startup current to prevent false tripping of
the circuit breakers.
Cooling RequirementsThe C4 CMTS should be installed in a
location with adequate ventilation. It is designed for long-term
operation at ambient air temperatures ranging from 5-40C. To
determine cooling requirements, assume 2800W for worst-case power
dissipation when using 2Dx12U CAMs. These values assume the
worstcase cooling requirements when the maximum number of CAMs (16)
are used. The C4 CMTS draws cooling air in through the front,
sides, and back at the bottom of the unit and expels it out the
sides and back at the top of the unit. Clear airflow must be
maintained in these areas to ensure adequate ventilation. If the C4
CMTS is installed in a closed or multi-unit rack
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assembly, the inlet air temperature could exceed the room
ambient air temperature and/or the air flow may be reduced. In
these cases the C4 CMTS requires a reduced maximum operating
ambient air temperature. CAUTION
As with all electrical equipment, operation at excessive
temperature accelerates the deterioration of components and
adversely effects performance. Prevent excessive heat buildup in
the rack.Fan Module Description As shown in Figure 1-1, the fan
modules: Draw in air through the intake vent at the bottom of the
chassis Moves the air across the internal components in order to
cool them Moves air out the exhaust vent on the top rear of the
chassis
Front of Chassis
Rear of Chassis
Figure 5-1: Internal Air Flow (side view)
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5 Installation Requirements
NOTE To ensure the proper air flow, make sure blank filler
panels are installed in unoccupied chassis slots. It is also
important to change the fan filter at least every two to three
months, depending on the air quality on site.
CAUTION
Care should be taken when dressing RF cables that they do not
obstruct the grillwork at the top rear of the chassis. This grill
is the primary heat vent for the chassis. Blocking it can cause
overheating and card failure. ARRIS recommends a minimum 6-inch
clearance around the top side and rear exhaust grillwork.
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6. Installing Modules and System Bring-up
TopicsMain Hardware Components Recommended Order for Installing
Chassis Components Rack Mounting the C4 CMTS Power Conditioning
Module (PCM) and Cabling Installing Modules in the C4 CMTS System
Control Module (SCM) Fabric Control Module (FCM) Fast Ethernet
Network Access Module (NAM) Gigabit Ethernet Network Access Module
Cable Access Module (1Dx8U CAM) Cable Access Module (2Dx12U CAM)
Initial System Configuration
Page2 6 8 9 17 21 28 31 34 41 46 51
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6 Installing Modules and System Bring-up
IntroductionThe following section lists the recommended order of
installation for rack mounting the C4 CMTS and installing the
various modules and components. Please read through this chapter
and become familiar with the order of operation before you begin.
This chapter also includes procedures necessary for a minimal
system configuration and bring-up. The minimal configuration
consists of one SCM, one FCM, one FastEthernet NAM or
GigabitEthernet NAM, and one 1Dx8U CAM or 2Dx12U CAM.
Main Hardware ComponentsThe C4 CMTS base system contains the
following components: Chassis Configuration CMTS chassis Two Power
Conditioning Modules (PCMs) Power Feed A & Power Feed B Cable
Access Module (1Dx8U or 2Dx12U) and associated Physical Interface
Card (PIC) Network Access Module (FastE or GigE) and associated PIC
Fabric Control Module (there is no FCM PIC) System Control Module
and associated PIC Three fan modules (numbered 0, 1, and 2). Each
fan module contains two fans, marked front and rear Air filter
(factory installed)
There are various ways to equip a chassis. CAM configurations
are dependent on the configuration of the cable plant of the
subscriber network. The module faceplate in each slot includes a
label stating the module type and multiple LEDs to indicate the
modules status. When operational, the Power On LED is lit, shows a
steady green, and the OOS display is off. When out-of-service, the
Out-of-Service LED is lit. The OOS LED glows a steady red to
indicate failure and flashes red to indicate self-test, diagnostics
in progress, or downloading software.
LED Description
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Module Types and Chassis SlotsFront ViewThe C4 CMTS chassis
contains twenty-one vertical slots labeled 0-20. These slots are
equipped for the following modules (or sometimes referred to as
front cards): One or two System Control Modules One or two Fabric
Control Modules One to four Fast Ethernet Network Access Modules or
one or two Gigabit Ethernet Network Access Modules One to sixteen
Cable Access Modules (1Dx8U or 2Dx12U)
Following is an illustration of the front of the chassis.
Figure 6-1: Front View of C4 CMTS
Release 4.2, Standard
ARRIS PROPRIETARY All Right