On 2/27/12 11:06 PM, MohitSoni wrote:
> Hi Friends,
>
> Is the SUBSCRIBE message without SIP ID in Request URI valid?
>
> Actually, i have encountered with a SIP UA which sends SUBSCRIBE for
> Voice Mail notifications where it sends only IP Address in the Request
> URI and not sending the SIP ID for which it requires notifications.
>
> Is such SUBSCRIBE valid?
From a sip protocol perspective it is valid.
It may or may not be valid for any particular event server.
I suspect that for most event servers it would not be.
It depends on whether that URI identifies a "resource" at the receiving
event server. An example where it might be valid would be when
subscribing to the dialog event at basic sip phone.
For an event server that supports a number of different users,
distinguished by the value of the user part of the URI, then it probably
would not be valid.
Thanks,
Paul
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