Manoj,

the call-ID is the real means to tie together all messages related to the same call.

Regarding your specific questions:

For a GK routed call, the GK "knows" about the call even in the case of pre-granted admission, and can of course send BRQ/IRQ. The CRV used for these RAS messages can be the same as in SETUP.

For a directly routed call with pre-granted admission, the GK is not immediately aware of the call (periodic IRQs for all calls is one way to obtain this knowledge eventually). However, the endpoint can always send RAS messages, e.g. BRQ or IRR. For these RAS messages it will use an arbitrary locally unique CRV and, more important, the same globally unique call-ID.

Ernst Horvath Siemens AG

-----Ursprüngliche Nachricht----- Von: Paul, Manoj [mailto:mpaul@TRILLIUM.COM] Gesendet am: Dienstag, 17. Juli 2001 01:39 An: ITU-SG16@mailbag.cps.INTEL.COM Betreff: CRV Blues

Hi All,

I have a couple of question related to the use of RAS CRV. Consider an endpoint EP1 has pre-granted admission and sends SETUP with 225CRV1 to GK. If GK subsequently sends a BRQ/IRQ for this call, what RASCRV is uses in these messages. Would RASCRV be same as 225CRV1 ? Secondly, is it expected that GK can potentially send BRQ/IRQ for a call for which it gave pre-granted admission to an endpoint? Any pointers are appreciated.

regards Manoj Paul.

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