Hi all,
I have some list of queries on sip ,
1) Please state a real time scenario where multiple contact headers will be
present in a REGISTER request ?
2) Why Register does not establish a dialog & subscribe establish a dialog ?
3) As per rfc 3261, it has been said that contact header is not mandatory in
REGISTER request but without contact header in REGISTER request our app is
generating 400 Bad Request, whether it is right or wrong ?
4) Why ACK should be considered as a transaction ?
5) What's the logical reason behind the "The Contact header field MUST
contain exactly one SIP
or SIPS URI in any request that can result in the establishment of a
dialog" ?
Thanks & Regards,
Karthik V
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