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*** Resending note of 03/29/96 10:13
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Subject: VPs and VCs for mpt communication
>Either way, you don't end up with a single VC-the VPI/VCI combination is
>how switches tell one VC from another. Even if you could get all switch
makers to go along with such a scheme, it doesn't save that much on over-
>heads associated with using separate pt-pt VCs.
--
>Eric Gray
Eric, the benefit of using the VPs with different VCI per source are
1) no (fewer, depending) connection establishment (signaling) is needed
in the network, 2) allows multiplexing and demultiplexing at merging
points, 3) simple CAC at the source (in general).
The problem is to manage the VCIs per source, i.e., assign them
uniquely which needs to be done off line (currently, but ITU is working
on it so keep tuned). Any switch that supports VP can be used in
this approach so no interoperability problems. Raif
.
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