Why PWE3 Should Adopt TDMoIP

1
Why PWE3 Should Adopt TDMoIP

• Shahram Davari
• Product Research Group
• PMC-Sierra
• Shahram_davari_at_pmc-sierra.com

2
Some Applications of TDMoIP

• Leased line services over IP/MPLS
• Between a customer site and a PoP
• Private line service over IP/MPLS
• Between two customer sites (PSTN bypass)
• Toll bypass
• Between two Central Offices (CO)
• Cellular backhaul over IP/MPLS
• Between BTS and BSC
• Carriers carrier

3
Reuse of Existing Technologies

• AAL1 is designed for circuit and loop emulation
• AAL1 is a proven technologies with off-the-shelf
  or available HW/SW
• 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
Need for Interworking with ATM

• Interworking with ATM is often required.
• Carriers currently use ATM for circuit/loop
  emulation

Simple and inexpensive
RADview SNMP Manager
T1/E1
T1/E1
ATM SAR
TDMoIP
ATM CES
IP/MPLS
ATM
TDMoIP
ATM CES
T1/E1
Complex and costly
SAR ltlt TDMoIP ATMCES
5
Ease of Interworking between ATM CES and
TDMoIP/MPLS
AAL1 PDU
AAL1 SAR
IP/MPLS
ATM
AAL1 PDU
IP/MPLS
TDMoIP/MPLS
SAR

ATM
ATM
ATM
ATM CES
6
ASAP Reuse

• 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 vendors development cost
• Current ASAPs support AAL1
• They can easily be SW upgraded to support TDMoIP
• Providers dont need to acquire new cards,
• they can re-use existing cards.
• Any other method requires new HW and major change
  of ASAP architecture

7
Easy Upgrade to IP/MPLS CES from Current ASAP
8
Conclusion

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