"Satyarth Negi" <[EMAIL PROTECTED]> asks:
> Can i have different phone numbers in Contact-Header and From-Header
> fields of a REGISTER .
>
> For example :
> Can we have a REGISTER request as described below :
>
> REGISTER
> ....
> >From : <sip:1234@<IP>:<PORT>
> ....
> Contact : <sip:5678@<IP>:<PORT>
> ....
>
> So here phone numbers ( 1234 and 5678 ) in From and Contact headers
> are different ?
> Can we have REGISTER request like this ?
Yes, if sip:1234@<IP>:<PORT> has the authority to perform a third-party
registration.
RFC 3261, section 10.2:
10.2 Constructing the REGISTER Request
REGISTER requests add, remove, and query bindings. A REGISTER
request can add a new binding between an address-of-record and one or
more contact addresses. Registration on behalf of a particular
address-of-record can be performed by a suitably authorized third
party. A client can also remove previous bindings or query to
determine which bindings are currently in place for an address-of-
record.
<snip>
From: The From header field contains the address-of-record of the
person responsible for the registration. The value is the
same as the To header field unless the request is a third-
party registration.
frank
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