1. Intro to TDMoIP2.ppt Slide 1 TDMoIP Eitan Schwartz Vice President and General Manager, TDMoIP Technologies RAD Data Communications Inc. Email: eitan@radusa.comPh: 201-529-1100 x 241 Web: http://www.rad.comFax: 201-529-5777 CONCEPT & TRENDS

2. Intro to TDMoIP2.ppt Slide 2 Contents Trends The opportunity and problem Solution – Circuit Extension over IP TDMoIP architecture and RAD’s Implementation Comparing TDMoIP with ATM and VoIP Benefits of TDMoIP Service Provider Solutions Enterprise Solutions Summary

3. Intro to TDMoIP2.ppt Slide 3 Packet over TDM  Today, Voice and data traffic traverse the TDM, circuit switched network IP, FR, & ATM carried across PSTN, T1, T3 and SONET Highways

4. Intro to TDMoIP2.ppt Slide 4 Trend: TDM Voice & Data over Packet  Tomorrow, TDM based voice and data will be carried across packet networks Cable DWDM Wireless Gigabit Ethernet Because IP services are Fast (GbE rates) Cheap (low $/Mbps) Reliable (QoS) Scalable (up to 10Gbps) Ubiquitous

5. Intro to TDMoIP2.ppt Slide 5 Trends Carriers installing more IP and Gigabit Ethernet Packet-based networks are scalable and cost less than traditional T1 and T3 leased lines Powerful Ethernet switches are dominating the enterprise because they are cheap and simple Enterprises consider migrating their legacy voice networks over IP, but are concerned that voice quality, service reliability and existing features may be compromised Service providers are looking to provide additional services over cost-effective IP Simple, low cost solutions continue to beat complex, expensive alternatives

6. Intro to TDMoIP2.ppt Slide 6 The Opportunity and Problem Opportunity –Convergence of voice and data reduces redundant administration, cabling and hardware costs Problem –Connecting PBXs and TDM equipment over IP is problematic due to signaling, timing and specialized features –Most solutions are complex and expensive; they usually compromise quality and functionality Feature transparency is often compromised

7. Intro to TDMoIP2.ppt Slide 7 Solution: TDMoIP Gateways Circuit Extension over IP Transparent extension of T1/E1 circuits over IP –The synchronous bit stream is chopped into packets –IP headers are added –Packets are forwarded to destination over the IP network –At destination, the original bit stream is reconstructed by removing IP headers, concatenating the packets, and regenerating the clock This technology is called TDMoIP

8. Intro to TDMoIP2.ppt Slide 8 Reversing the Approach Classic approach: IP over... IP ATM/FR TDM/SONET Fiber IP Reverse approach: … over IP Ethernet Fiber TDM So now TDM simply becomes the legacy migration application running over an IP infrastructure

9. Intro to TDMoIP2.ppt Slide 9 TDMoIP Architecture Circuit Extension over IP User Interface Standards based (e.g.T1, E1) Unframed or framed/channelized Transparent to protocol - Any data (BSC, FR,..) - Any voice (PCM, ADPCM,..) - Any signaling (PRI, DPNSS, SS7,..) Network Interface Low cost (e.g. 10/100BaseT) Configurable QoS options: - VLAN for layer 2 priority (802.1p&q) - ToS for IP level priority - known UDP Ports for layer 4 priority Compensate packet delay variation External / adaptive clock regeneration Low processing delay Scalability, redundancy, management & diagnostics TDMoIP Traditional Circuits Packet Networks

10. Intro to TDMoIP2.ppt Slide 10 IPmux Family 1, 4 or 16 T1/E1 ports over Ethernet uplink TDM payload configurable from 48 to 384 octets Overhead as low as 7% Low processing delay (under 1ms) QoS support for 802.1p&q, ToS & IANA UDP ports SNMP management with graphic interface Performance monitoring for T1/E1 and LAN ports Back Panel IPmux-1 IPmux-4 IPmux-16

11. Intro to TDMoIP2.ppt Slide 11 TDMoIP Architecture Challenge Redundant power supply and uplink High availability Scalable through Ethernet switch Easily scalable Clock recovered through network Support for cross network clock regeneration Jitter buffer compensates for up to 32ms delay variation (300ms on IPmux-1) Support packet delay variation Low processing delay (under 1ms). Low delay Supports 802.1p&q (layer2), IP ToS (layer3) & IANA UDP ports (layer 4) Complete support for QoS facilities Physical layer extension over IP Transparent to Protocol 10/100BaseT Ethernet High speed, low cost network interface Standard Framed & Unframed E1/T1 supported Standard Interface supports full and Fractional services

12. Intro to TDMoIP2.ppt Slide 12 Price Comparison: IP vs. TDM $/Mbps time T1, T3 circuit costs T1/T3 circuit costs using IPmux IP costs Conclusion: Price of IP bandwidth decreasing at a much faster rate than that of T1 or T3

13. Intro to TDMoIP2.ppt Slide 13 TDMoIP vs. ATM TDMoIP provides similar benefits to ATM: –low end-to-end delay –maintaining integrity of framed or unframed T1/E1 In contrast to ATM, TDMoIP: –is simpler and less expensive –has configurable packet size for optimizing overhead/delay trade off –is carried over ubiquitous IP and Ethernet networks

14. Intro to TDMoIP2.ppt Slide 14 TDMoIP vs. VoIP TDMoIP and VoIP both offer convergence over IP In contrast to VoIP, TDMoIP: –is transparent to protocols and signaling –is simpler and less expensive –supports installed PBXs with no loss of functionality –supports all modem and fax rates –is suitable for sync/async data protocols –maintains integrity of framed and unframed T1/E1 circuits

15. Intro to TDMoIP2.ppt Slide 15 TDMoIP and VoIP TDMoIP (Telephony over IP) Simple & evolutionary –uses standard, mature, and well known protocols: T1, IP –low cost of ownership Maintain installed PBXs –significant cost savings –little disruption to business No loss of PBX functionality Low delay –transparent to signaling and protocols Configurable packet size –low delay –configurable overhead Data & voice circuit extension DS0 level bundling & X-connect VoIP (IP Telephony) Complex & revolutionary –new evolving protocols such as H.323, MGCP, and SIP –complexity requires retraining IT Fork lift upgrade (reinvent the telephone switch) –compatibility issues Limited today, new features possible Long call setup times –translation between signaling formats (SS7, ISDN,..) Packets depend on codec samples –delays as sample is recorded –overhead on each voice session Primarily voice Voice switching per call Have same goals - convergence,...but a few critical differences:

16. Intro to TDMoIP2.ppt Slide 16 Alternatives for Migrating Legacy PBX’s to IP Networks “If you’re happy with your telephony features, but you wish to migrate to IP networking without fork lift upgrades and lost functionality” “If current telephony features are insufficient and you’re ready to take on the challenges of new and evolving protocols” Simple, Low cost of ownership Complex, Expensive TDMoIP VoIP An inexpensive migration strategy to IP: The alternative for customers who have fully depreciated their telephony equipment:

17. Intro to TDMoIP2.ppt Slide 17 Benefits for End-Users and Integrators End User –Simple, low cost voice/data convergence solution over IP and Ethernet –Protect investments in PBX and TDM equipment with no fork lift upgrades and no loss of functionality Integrators –Tie the circuit switched world into the IP economy –Help build reliable enterprise and institutional networks –Address enterprise business concerns by providing evolutionary rather than revolutionary solutions

18. Intro to TDMoIP2.ppt Slide 18 Benefits for Vendors: Complimentary Solutions PBX vendors –PBXs with proprietary signaling and unique feature sets are now fully supported over IP Ethernet switch and router vendors –Now are empowered with traditional TDM voice, video & data capabilities Wireless radio and laser equipment vendors –Systems designed for LAN extension can now deliver leased line services to remote buildings

19. Intro to TDMoIP2.ppt Slide 19 Benefits for Competitive Carriers Compete with ILEC by providing voice and leased line services over Ethernet or IP infrastructure Expand market share quickly into tier 4 towns with scalable solution that reduces risk Efficiently groom T1/E1 circuits onto optical and wireless networks (DS0 granularity) Provide access to ATM, Frame Relay, ISDN and X.25 over IP networks

20. Intro to TDMoIP2.ppt Slide 20 Circuit Extension over IP - Generic Carrier Application m x T1/E1 Service POP Regional POP n x T1/E1 Circuits extended to customers Multi-tenant Unit (MTU) Basic Transport Enhanced Services IP Customers IPmux Gigabit Ethernet Switch Wireless Ethernet Modem IP Router DSLAM TDM Synchronous link (e.g T1) Packet (e.g 10/100BaseT) KEY 3rd party service offerings PSTN Centrex Clearinghouse VoIP ATM Frame Relay etc.

21. Intro to TDMoIP2.ppt Slide 21 Service Provider Solutions Circuit Extension over IP - Generic carrier application –Wireless and optical local loop –Voice and data services to multi-tenant buildings –Expand market Share using ILEC for local loop –Connecting cellular networks over IP –Grooming DS0 channels onto T1/E1 and Ethernet –Bundled services: PSTN, VoIP and Internet

22. Intro to TDMoIP2.ppt Slide 22 Circuit Extension over IP - Generic Enterprise Application IP Gigabit Ethernet Switch 10/100BaseT Ethernet Switch Wireless Ethernet Modem IP Router TDM Mux LAN Location A Location B PBX LAN Video IPmux DXC-30 LAN Location C PBX IPmux DXC-30 TDM Mux TDM Synchronous link (e.g T1) Packet (e.g 10/100BaseT) KEY T1/E1s

23. Intro to TDMoIP2.ppt Slide 23 Enterprise Applications Circuit Extension over IP - Generic application –Centralized Voice Services –Voice and Video across Campus LAN –Metro Area networks: Adding Voice to Optical Packet Networks –Building a Wireless Campus: Voice and Data integration over Ethernet –Adding Voice to Wireless LAN Networks –Drop-and-Insert over Fiber (Max 500 T1) –Adding Voice to LAN over ATM Networks –PSTN Bypass –Secure Government / Military Networking over IP Legacy TDM Multiplexing over IP - Generic Application –Extending Analog or ISDN Telephones over Ethernet or IP networks –Channelized T3/E3 & High-Speed Serial Data over Ethernet or IP –SCADA: System Control and Data Acquisition

24. Intro to TDMoIP2.ppt Slide 24 Simple, inexpensive migration path to IP without compromising current telephony features Transparent to all signaling and protocols Protects investment in PBX and TDM equipment with no fork lift upgrades Circuit Extension over IP provides the benefits of IP networks without the dangers of a new technology Supports legacy telephony services over IP with no loss of functionality Empowers IP networks with leased line capabilities for Voice, ATM, Frame Relay, SNA, etc.Summary