RE: [AVT] I-D ACTION:draft-ietf-avt-tcrtp-08.txt

["Yaakov Stein" <yaakov_s at rad.com>]

> ATM's multiplexing only helps significantly if you can take 
> advantage of it, which requires chosing a codec and 
> packetization interval the fit into the user payload, and 
> requires multiple streams terminating on the same VPI/VCI.

ITU Y.1414 uses AAL2 directly over MPLS.
Similarly draft-ietf-pwe3-tdmoip uses AAL2 directly over UDP/IP.

The format is :
  PSN (MPLS or IP) headers
  first connection : mini-header + payload
  second connection :  miniheader + payload
  ...
  last connection : miniheader + payload

The only payload size restrictions are maximums due to the 
size of the AAL2 length field in the miniheader.

> We needed a compression technique that saved bandwidth even 
> in the absence of multiplexing -- such as a branch office 
> doing VoIP with a single user.

In that case you only need a robust header compression method.

Y(J)S


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