Hi, while testing with various vendor SIP entities we noted the following grammar discrepencies. Mostly stacks are lenient towards such incoming mistakes, but small as they may be, it might be worthwhile for the respective vendors to fix their code. 1. Some vendors still use UTC format in the Date: header. SIP mandates it to be GMT. Therefore a construct like Date: Sat, 01 Jan 2000 06:32:29 UTC is wrong. 2. Supported header is defined as 1#(option-tag) where option-tag is a token. Therefore constructs such as Supported:aa bb cc is wrong. It should be separated by "," not " " Regds Arjun
