Dear All,

It has been mentioned that when a gatekeeper performs a re-route it would be good for the client to know about it. After much investigation, there seems to be no message in Q.931 that handles this case. In the text that I proposed in Sunriver I suggested that a Facility message with a H.450 ctComplete should be sent. However, this is not much use to an entity that does not support supplementary services. Therefore it might be useful to add can extra case to the H323-UU-PDU to cover this, e.g.:

H323-UU-PDU ::= SEQUENCE { h323-message-body CHOICE { setup Setup-UUIE, callProceeding CallProceeding-UUIE, connect Connect-UUIE, alerting Alerting-UUIE, userInformation UI-UUIE, releaseComplete ReleaseComplete-UUIE, facility Facility-UUIE, ..., progress Progress-UUIE, dummy NULL, reRouteIndication ReRouteIndication }, nonStandardData NonStandardParameter OPTIONAL, ..., h4501SupplementaryService SEQUENCE OF H4501SupplementaryService OPTIONAL }

ReRouteIndication ::= SEQUENCE { display IA5String (SIZE( 0..255) ), endpointInfo EndpointType, ... }

This could then be sent by a gatekeeper when a re-route has been done.

Any comments?

Pete ================================= Pete Cordell BT Labs E-Mail: pete.cordell@bt-sys.bt.co.uk Tel: +44 1473 646436 Fax: +44 1473 645499 =================================