In italy we use PPPoA with vpi/vci (8,35) with every ISP. In DSLAM the ATM switch change these values? or how is it possible to demultiplex traffic between every user? Thanks in advance.
Dario
vpi/vci question...
Aug 04, 2006
2 Replies
Yes, the DSLAM changes the VPI/VCI value. Think of the DSLAM as a big ATM switch that maps in and out various VPI/VCI values. While all the ports have 8,35 facing out to the CPE, back to the network, they'll get mapped into something else, (ie. 32/32 for port 0/1, 32/33 for port 0/1, etc. etc.). Just part of the config setup of the DSLAM.
thanks a lot. I had an exam called broadband cable systems at my university but never explained it :) Dario
"Doug Mc>>In italy we use PPPoA with vpi/vci (8,35) with every ISP. In DSLAM the ATM
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