[SIPForum-discussion] Regarding registration

Paul Kyzivat pkyzivat at alum.mit.edu
Tue Aug 20 16:08:28 UTC 2013

On 8/17/13 7:01 AM, sip lipu wrote:
> Hi All
>   If  UAS will send the registration request to registration server
> with out "contact" header field then is the register server will send
> successful 200 OK ,if yes how can its possible because  registration
> server will bind  CONTACT  and TO  header field and keep it in the
> location server ..

The REGISTER request serves multiple purposes.

A REGISTER without a Contact simply returns a response containing all 
the contacts currently registered for the To URI.


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