A couple clarifications may be needed regarding the IRQ message in H.225.0. Item 1: The definition of callReferenceValue currently states "If zero, this message is interpreted as a request for an IRR for each call the terminal is active on." The IRR defines perCallInfo as a SEQUENCE OF SEQUENCE and I seem to recall that the original intent was to be able to pass information about multiple calls within a single IRR message. So, I'd suggest changing the definition to "If zero, this message is interpreted as a request for perCallInfo for every call that is active at the endpoint, and which may be sent in one or more IRRs". Item 2: The callIdentifier field is not currently optional in the IRQ. I see these possibilities for callIdentifier in the case of a request for information about all calls: 1) state that if callReferenceValue is 0, this field is to be ignored but filled with some data 2) state that callIdentifier should be set to some dummy value, such as all zeros 3) change the ASN.1 definition so that callIdentifier is OPTIONAL, and add appropriate text regarding its use in the field definition Since callIdentifier is defined as a SEQUENCE to allow possible future expansion, I'd suggest option 1. Please comment. Glen Freundlich ggf@lucent.com Lucent Technologies office: +1 303 538 2899 11900 N. Pecos fax: +1 303 538 3907 Westminster, Colorado 80234 USA