Hi,

Why is the remoteExtensionAddress field in SETUP and FACILITY messages of H.225 specified as AliasAddress whereas the same field in ACF, LCF has been specified as SEQUENCE OF AliasAddress?

The flexibility given by the ACF message has been taken away in the subsequent H.225 messages. For example, the sequence of the AliasAddress fields for a remote endpoint may include its E.164 address and its TransportAddress. However, when sending the SETUP message, the originating terminal can send only one of these. Now, when the intermediate Gateway (proxy or similar application) receives this message, either it would not know to whom to connect to (if the TransportAddress has not been specified) or its CDRs would not have the complete information (they require the E.164 address). Also, an additional overhead would be incurred in re-resolving the Alias!

Is this an oversight or was it intentional? Could somebody let me know why such a decision had been taken?

Regards, Aparna.