[SR-Users] Proxying INVITE message without port information in R-URI
abalashov at evaristesys.com
Tue Jan 18 20:46:20 CET 2011
It is assumed 5060 by default.
Alex Balashov - Principal
Evariste Systems LLC
260 Peachtree Street NW
Atlanta, GA 30303
On Jan 18, 2011, at 2:27 PM, Vikram Ragukumar
<vragukumar at signalogic.com> wrote:
> Alex, Klaus thank you for your replies.
>> Usually the softphones register to the proxy or SIP server. Thus, the
>> proxy or SIP server knows under which IP:port (The IP:port from which
>> the REGISTER was received) it can contact the sofpthone.
> Yes, the softphones are registered to the SIP server, and hence the
> SIP server has the IP:port information required to contact the
> softphone. However, the SIP server does not include the port number
> in the R-URI of the INVITE that it generates.
> This port number is dynamically assigned by the firewall and is not
> fixed, so manipulating the pseudo variable $rp by assigning it a
> fixed number will not work.
> If it is not mandatory to include the port number in the R-URI, how
> does the proxy determine the port to which the SIP message must be
> forwarded ?
> Thanks and Regards,
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