paulb@mlacus.oz (Paul Bandler) (02/08/90)
I've recently been studying the current developments of Additional Packet Mode Bearer Services, particularly Frame Relaying, that are occuring within the CCITT and probably other national standards bodies. It seems that it is envisaged that packet switching services of the future over ISDN such as Frame Relaying are expected to support OSI CONS by the user using an enhanced version of LAPD, LAPD+, in conjuntion with out of band call setup with Q.931. This will provide a lean and mean OSI WAN CONS. Now for LAN/WAN OSI CONS relays today you have to run X.25 over both the LAN and the WAN connection. Now if in the future we're going to see WAN CONS provided over LAPD+ then it would seem a bit strange to me to have to go 'up' to a full X.25/LLC[2|1] stack to get the CONS across the LAN. So the question for the group then is, does anyone know if there is any work being done, or is planned, to look at supporting LAN CONS across a similarly enhanced LLC2+? Paul Bandler - Australian Centre for Unisys Software.