-----Original Message----- From: Callaghan, Robert [SMTP:Robert.Callaghan@ICN.SIEMENS.COM] Sent: Monday, April 26, 1999 5:12 PM [[TomT]] snip

However, one major problem is only touched. You stated the multi-DS0s may be established using multi-link procedure. To the network, these appear as individual calls. The network will route the call such that it reaches the specified endpoint. The network has no concept of routing multiple independent calls by the same path. Since the gateway is only part of network, by what means can it be determined that the interworking of H.320 to H.323 will have all of the applicable DS0 connection at the same gateway? If they do not use the same gateway, how do the endpoints and gateways handle the connection?

[[TomT]] I agree that this is mysterious, but people must solve it now. Thoughts of ISDN and wideband service go through my mind. If it helps any, I'll point out that we're really talking about an MCU rather than a Gateway at this point.

Another problem was not discussed. If a H.320 connection arrives at the gateway, how does the gateway know that H.320 to H.323 interworking is required as opposed to the simple transport of the signal to another egress gateway? As a corollary, how does the gateway know that the signal is not voice, and should be transported as 64Kbps clear?

[[TomT]] That's where the V.140 negotiation comes in.

Bob

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Robert Callaghan Siemens Information & Communication Networks Tel: +1.561.997.3756 Fax: +1.561.997.3403 Email: Robert.Callaghan@ICN.Siemens.com

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