1. 1 Why PWE3 Should Adopt TDMoIP Shahram Davari Product Research Group PMC-Sierra Shahram_davari@pmc-sierra.com

2. 2 PMC-Sierra Some Applications of TDMoIP l Leased line services over IP/MPLS -Between a customer site and a PoP l Private line service over IP/MPLS -Between two customer sites (PSTN bypass) l Toll bypass -Between two Central Offices (CO) l Cellular backhaul over IP/MPLS -Between BTS and BSC l Carrier’s carrier

3. 3 PMC-Sierra Reuse of Existing Technologies l AAL1 is designed for circuit and loop emulation l AAL1 is a proven technologies with off-the- shelf or available HW/SW l AAL1 has a number of desirable features -Clock recovery mechanism -Structure pointer (for multi-frame recovery) -Support for CAS -Support for structured and unstructured TDM -Support for Nx64 Kbit/sec -Optional error correction (FEC)

4. 4 PMC-Sierra Need for Interworking with ATM l Interworking with ATM is often required. -Carriers currently use ATM for circuit/loop emulation IP/MPLS T1/E1 RADview SNMP Manager ATM TDMoIPATM CES T1/E1 ATM SAR T1/E1 TDMoIP ATM CES SAR << TDMoIP + ATMCES Complex and costly Simple and inexpensive

5. 5 PMC-Sierra Ease of Interworking between ATM CES and TDMoIP/MPLS AAL1 PDU AAL1 SAR ATM IP/MPLS AAL1 PDUIP/MPLS ATM … TDMoIP/MPLS ATM CES SAR

6. 6 PMC-Sierra ASAP Reuse l Any Service Any Port is an important architecture -It supports any service using a single card -It reduces inventory for network operators -It reduces the vendor’s development cost l Current ASAPs support AAL1 -They can easily be SW upgraded to support TDMoIP -Providers don’t need to acquire new cards, they can re-use existing cards. -Any other method requires new HW and major change of ASAP architecture

7. 7 PMC-Sierra Easy Upgrade to IP/MPLS CES from Current ASAP SONET/SDH Framer T1/J1/E1 Framers TU/VT Mappers M13 Muxes T3 Framers optics AAL1 SAR/CES Structured & Unstructured Preserve existing Layer 2 ATM Infrastructure NP TM & Policing IP/MPLS Inteworking Software Upgrade to IP/MPLS Infrastructure TDM Framer Sonet Framer HDLC Engine IMA Engine AAL1 Engine

8. 8 PMC-Sierra Conclusion l TDMoIP is based on proven AAL1 technology -  no risk l TDMoIP is based on off-the-shelf or available AAL1 HW/SW -  fast time to market l TDMoIP Interworks seamlessly with ATM -  easier and less expensive Interworking l PWE3 should adopt TDMoIP for TDM emulation over IP/MPLS