Dear Sir or Madam,

let me please put a question concerning the H.323/H.225 call signalling and RAS parameters.

Going on the assumption that the gatekeeper routed call model is chosen, we would like to know how to interpret "destCallSignalAddress" and "srcCallSignalAddress". We focus on following configuration: endpoint A <-> gatekeeper <-> endpoint B, where endpoint A is the initiator of a call.

1. Is it correct that the CallSignalAddress of the gatekeeper is to be used as the destCallSignalAddress for messages sent from endpoint A or endpoint B? 2. Is it correct that the CallSignalAddress of the gatekeeper is to be used as the srcCallSignalAddress for messages sent from the gatekeeper to endpoint A or endpoint B? 3. Is it correct that the CallSignalAddress of endpoint B is to be used as the srcCallSignalAddress for messages sent from endpoint B to the gatekeeper (e.g. ARQ message) although endpoint B is the called party and not the calling one?

Maybe there is a generic definition for "source" and "destination" for multi-station-calls.

Thanks a lot in advance for your help.

Regards, Wolfgang Bandow