Glen! (1) and (2) together (filled with zeros) Definitely not (3), since V.2 is already deployed. Orit Levin RADVision Inc., 575 Corporate Drive - Suite 420 Mahwah, NJ 07430 Tel: 201-529-4300 (230) Fax: 201-529-3516

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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.