18 Jan
2011
18 Jan
'11
9:46 p.m.
It is assumed 5060 by default.
--
Alex Balashov - Principal
Evariste Systems LLC
260 Peachtree Street NW
Suite 2200
Atlanta, GA 30303
Tel: +1-678-954-0670
Fax: +1-404-961-1892
Web: http://www.evaristesys.com/
On Jan 18, 2011, at 2:27 PM, Vikram Ragukumar
<vragukumar(a)signalogic.com> wrote:
Hello,
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,
Vikram.