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Quick Installation Sheet | CMA-607-AEN | Page 1Corning Optical
Communications
1. ITEMS REQUIRED FOR IFB INSTALLATIONThe following kits and
included items are required for installing the IFB. If any of the
listed items are missing, contact your Corning representative.
Item Qty ImageIFB (P/N: AK-ONE-HE-GX-INTBOX) 1
DC Terminal Block; two pole with screw for wire (Manufacturing
PN: Dinkle MP/N 2ESDV-02P)
Note: The DC terminal blocks are pre-inserted into the units’ DC
connectors.
1
QMA 50 Ohm RF load terminations (RF connections are
preterminated)
25
ERFCv2-OCH — RF Cables used for interfacing between headend
(i.e., HEU/IHU) RF extender module (RIX) and IFB; includes three
pairs of UL/DL QMA cables and one QMA cable 10 MHz sync cable;
Length = 2 m
1
GENERAL INFORMATION• The IFB is a combiner/splitter unit that
combines services from two HEUs/IHUs and interfaces between the
headend units
and GX remotes via the optical central hubs (OCHs).
• The IFB includes an integrated clock unit (pilot) required for
the TDD band supported by the GX dual-band WCS/2.5 GHz TDD
remote.
• The unit is installed in a 19-in rack with the headend and OCH
units.
• Number of supported OCH optical modules per service group —
six OCH-4-WDMs or three OCH-8-WDMs.
This document describes how to install the IFB and perform the
connections towards the headend unit(s) and the OCHs.
Table 1. IFB Kit Items
CMA-607-AEN
Headend Unit-to-GX Interface Box (IFB)Assembly Quick
Installation Sheet
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Quick Installation Sheet | CMA-607-AEN | Page 2Corning Optical
Communications
2. ADDITIONAL REQUIRED ITEMS The IFB includes 12 QMA output
ports which interface to the OCHs. QMA/QMA cables are not provided
with the IFB.
Corning QMA/QMA cable accessory kits are available and can be
ordered separately.
Cable Accessory Kits
AK-RIU4-OCH-CABLES – Cable Accessory Kit; includes four
QMA-to-QMA R/A cables; Length = 1 m
AK-RIU12-OCH-CABLES – Cable Accessory Kit; includes four
QMA-to-QMA R/A cables; Length = 1 m
Table 2. Cable Accessory Kits
Figure 1. Example of Location of Units in 19-in Rack
3. MOUNT IFB IN 19-IN RACK
Step 1: Determine the location of the unit in the rack. Note:
Keep in mind the length of the ERFCv2-OCH
cables and the QMA/QMA cables connecting to the OCH rear panel
input ports. See Figure 1 for example of rack configuration.
Step 2: Install the IFB (1U) into the 19-in rack and, using the
preassembled rack brackets, secure the unit in place with
appropriate rack screws (two for each bracket).
4. GROUNDING
The grounding connection is performed via two screws located on
the IFB rear panel.
Required tools and components
The following additional (not supplied) tools and components are
required for connecting the system ground:
• Grounding wire and two-hole lug. The grounding wire should be
sized according to local and national installation requirements.
The size of the provided grounding screws is 1/4-in supporting 18
AWG cable. Note: The length of the grounding wire depends on the
proximity of the switch to proper grounding facilities.
• Wire-stripping tool to remove the insulation from the
grounding wire
Step 1: Use a wire-stripping tool to remove approximately 0.4 in
(10.9 mm) of the covering from the end of the grounding wire.
Step 2: Insert the stripped end of the grounding wire into the
open end of the grounding lug.
Step 3: Crimp the grounding wire in the barrel of the grounding
lug. Verify that the ground wire is securely attached to the ground
lug by holding the ground lug and gently pulling on the ground
wire.
Step 4: Prepare the other end of the grounding wire and connect
it to an appropriate grounding point at the site to ensure adequate
earth ground.
Figure 2. IFB Side Panel with Rack Bracket
Figure 3. IFB Rear Panel — Grounding Screws
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Quick Installation Sheet | CMA-607-AEN | Page 3Corning Optical
Communications
Figure 4. DC Wiring Connections
5. DC WIRING CONNECTIONS
Power input voltage: -40 V to -58 V
• Maximum current: 0.3 A
• Consumption power: 12 W
Step 1: Identify the positive and negative terminals on the feed
positions as indicated on the”Main Power” connector. The wiring
sequence is positive to positive and negative to negative as shown
in Figure 4.
Step 2: Open the terminal block screw above the negative feed
position and then insert the exposed black wire (negative feed)
into the terminal block.
Step 3: Torque the terminal block captive screw (above the
installed wire lead) using a ratcheting torque screwdriver.
Recommended torque is 0.51 N•m.
CAUTION! Secure the wires coming in from the terminal block so
that they cannot be disturbed by casual contact. For example, use
tie wraps to secure the wires to the rack.
Step 4: Connect the DC wiring to the DC power source.
6. IFB-TO-HEU/IHU CONNECTIONS
Refer to Figure 5 and connect the HEU(s) to the IFB using the
ERFCv2-OCH cable as follows:
Note: Each ERFCv2-OCH cable supports UL/DL connections to up to
three service group input connections and one 10 MHz reference
clock connection.
Step 1: Connect the 9-pin connector side of the ERFCv2-OCH cable
to an available HEU/IHU RIX port and secure the connector in
place.
Step 2: UL/DL QMA connections — connect a pair of UL/DL QMA
cables to each of the IFB UL/DL service group input ports (i.e.,
SG1, SG2, and SG3).
Step 3: Connect the single QMA connection cable to the IFB 10
MHz QMA port.
Step 4: Perform Steps 1-2 above for second HEU if installed
(only one 10 MHz clock reference connection to the IFB is
required).
Step 5: Make sure that any unused ports are terminated with the
QMA 50 Ohm RF load terminations.
Figure 5. Example of Connections between IFB and Two HEUs via
ERFCv2 Cables
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Corning Optical Communications LLC • PO Box 489 • Hickory, NC
28603-0489 USA800-743-2675 • FAX: 828-325-5060 • International:
+1-828-901-5000 • www.corning.com/opcommCorning Optical
Communications reserves the right to improve, enhance, and modify
the features and specifications of Corning Optical Communications
products without prior notification. A complete listing of the
trademarks of Corning Optical Communications is available at
www.corning.com/opcomm/trademarks. All other trademarks are the
properties of their respective owners. Corning Optical
Communications is ISO 9001 certified. © 2017 Corning Optical
Communications. All rights reserved. CMA-607-AEN / December
2017
P/N 709C022001 Rev A00
7. IFB-TO-OCH CONNECTIONS
Notes: • The IFB output connections to the OCH are performed
using QMA/QMA cables (not provided with unit).
• Each IFB supports two optical modules (i.e., one OCH-8 or two
OCH-4 units) per service group.
Refer to Figure 6 and connect the IFB to the OCH as follows:
UL/DL QMA connections — connect a pair of QMA/QMA cables from
each of the service group UL and DL output ports to the OCH optical
module UL and DL link ports. IFB supports connections to two
optical modules per service group.
IMPORTANT! Make sure that any unused ports are terminated with
the QMA 50 Ohm RF load terminations.
8. VERIFY NORMAL OPERATION
Refer to IFB LEDs and verify normal operation.
Figure 6. Connections Between IFB and Three OCH-8 Units
LED Description
ALM LED Green — TDD sync lockedRed — TDD sync unlocked
PWR LED Green — power input detectedOff — no power
Table 3. IFB LED Descriptions