FCC – Office of Engineering and Technology “Tutorial on Technical Challenges Associated with the Evolution to VoIP” Presented by: Susan Spradley – President, Wireline Networks Alan Stoddard – General Manager, Carrier Next Generation Networks FCC Office of Engineering and Technology September 22, 2003
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FCC – Office of Engineering and Technology
“Tutorial on Technical Challenges Associated with the Evolution to VoIP”
Presented by:Susan Spradley – President, Wireline Networks Alan Stoddard – General Manager, Carrier Next Generation Networks
FCC Office of Engineering and TechnologySeptember 22, 2003
• Accommodate access link speed (e.g., wireless)• Reduce bandwidth needed in core:
− trade off compression against cost
Concerns• Baseline voice quality will be lower for lower bit-rates• Increased end-to-end delay• Reduced performance with expected packet loss rates• Transcoding
− are there other compression codecs in the network?− how often will multiple transcodings occur in a complicated
path?− frequency of use for features requiring transcoding
Transport & handoff (IP,ATM, TDM, packet islands, TDM handoff)
Results Analysis & Processing
Implementation
FCC-OET 9/22/03 -- 17
ReliabilityMaintaining service during network failure events
• Design & Testing: Reliability Before Deployment─ Reliability Analysis: H/W+S/W Failure rate prediction─ System and network failure mode analysis─ Zero Downtime Upgrade and Maintenance by Design
• People & Processes: Responsiveness & Global Support─ Traffic assurance verification in Large Office test labs─ Large System Integration Centers in all market environments
Asia, NA, SA, Europe, Asia• Architecture: Engineered for Redundancy & Survivability
─ Self-Healing, Recovers in a Crisis─ Overload Controls incl. Priority Service to Essential Services ─ Lawful Intercept (CALEA)
"I find that the harder I work, the more luck I seem to have." - Thomas Jefferson
FCC-OET 9/22/03 -- 18
Control (OAM&P)
Signaling
Bearer/Data Public Network
Voice Network Traffic
Maintaining Security with VoIP
VoIP
Shared Channels
Network Security Hurdles:• Theft of Service• Service Disruption• Privacy
– Bearer - eavesdropping– Signaling – collect caller ID / information– Control - theft of subscriber info
Transition Models Overlay - Grow all new line and trunks on VoIP, Cap TDM
Evolve - Add IP interfaces to existing TDM infrastructure, new growth on VoIP
Rip & Replace - Replace existing TDM infrastructure with VoIP
Car
rier
Ente
rpris
e
TDM
PBX or Key System
Softswitch
IP PBX
Carrier Hosted VoIP
Hybrid Softswitch
Hybrid IP PBX
Softswitch
IP PBX
Carrier Hosted VoIP
Total Cost - $$ Total Cost - $ Total Cost - $$$
or
+
+
FCC-OET 9/22/03 -- 23
Enterprise Transition IP PBX
Remove Barriers to Profitability• Retail IP Phones provide cost and feature flexibility• Reduced cost IP connectivity to PSTN• Enhanced end user mobility (campus-wide) – increased productivity
Evolve - Hybrid IP PBX• Churn users as needed – growth or
service mobility • Leverage existing CPE
Ovrelay (New) / Replace - IP PBX• New offices or branch sites • Minimize in-building wiring by
using data only connection
Over 25% of the US PBX base expected to be IP-enabled by year end 2005
FCC-OET 9/22/03 -- 24
•Converged links – local, LD, data•Simple mgmt, efficient b/w use •Improved access for remote users
Enterprise Transition Separate Interconnect to VoIP VPN
•Separate voice & data links •Separate local PSTN & LD connectivity•Complex mgmt, inefficient b/w use
Key System
Sites
PBXSites Centrex
Sites
HQ Site 1
HQ Site 2
VoIP VPNProvider
IP CentrexSites
IP PBXSites
DataProvider
LDProvider
LocalProvider
IP CentrexSites
Key SystemSites
IP PBXSites
PBXSites Centrex
Sites
HQ Site 1
HQ Site 2
Remove Barriers to Outsourced Private Networking Drive New Carrier Revenue / Customer Retention
FCC-OET 9/22/03 -- 25
Enterprise Transition Hosted VoIP (IP Centrex)
Remove Barriers to Outsourced Voice – Save up to 35% over IP PBX• Retail IP Phones provide cost and feature flexibility• Outsource but retain control with improved end user management tools
and simplified moves, add, changes • Avoid Long Distance charges • Enhanced user mobility and feature transparency – campus-wide, at
home, remote offices, on the road – for improved productivity
Drive High Margin Carrier Revenue Stream - Differentiated Service Bundle
Evolve – Hybrid IP Centrex • Churn users as needed – growth or
service mobility • Leverage existing CPE
Overlay (New) / Replace - IP Centrex• New offices or branch sites • Minimize in-building wiring by
using data only connection
FCC-OET 9/22/03 -- 26
Long Distance Transition
Remove Barriers to Carrier Expansion & Service Introduction • Improved Capacity - Relieves CPU Exhaust• Fewer Trunk Groups, Muxes, X-Connects & Simplified Trunk Rearrangement• 15-25% Reduction of Interconnect Ports between Switches• Ability to Address New Markets at Low Cost
Provide up to 20% Carrier Cash Flow Improvement and Packet Infrastructure to Speed IP Services Delivery
Overlay • Add additional switching nodes • Groom trunks to new VoIP nodes • Interconnect inefficiencies
Remove Barriers to Carrier Expansion & Service Introduction• Eliminate Tandems, X-Connects, Trunking between Switch Nodes• Reduce Switch Nodes by 50-85%, Equipment by 60-80%, B/W use up to 30%• Expand Out of Territory at Low Cost • Retain / Grow Centrex - National Centrex, Centrex IP, Churn PBX to Hosted IP
Provide 10-20% Carrier Cash Flow Improvement and Packet Infrastructure to Speed IP Services Delivery
Overlay • Add additional switching nodes • Groom trunks to new VoIP nodes • Interconnect inefficiencies
Evolve - Converged Desktop • Traditional voice services maintained with new multimedia add-ons
• Existing desktop retained - new phone upgrades at end user driven pace
• Utilizes existing TDM SIMRING or IN• Enables ubiquitous service delivery
Multimedia Existing Phone
Remove Barriers to New Service Introduction•Simplify communications – Personal Communications Mgr, Unified Messaging •Enhance productivity – Video Calling & Conferencing, Web-Push / Co-Browsing
Provide New Carrier Revenue Stream & Differentiate Service Set
Overlay (New) / Replace • IP phone required • Softclient flexibility – PDAs and PCs become phones
• Voice becomes a subset of data services bundle – delivered over DSL or data connection