Klaus,
To me it seems that the SIP server also does some kind of NAT traversal:
it puts the Contact IP in to the RURI but it sends the request to the
IP:port from which the REGISTER was received (that's called NAT traversal).
So, either fix the SIP server (make sure it adds the port as in the
C
>> The contact usually is the IP address of the client. So, if you the SIP
>> server routes based on the contact header, it should send the INVITE
>> directly to the client not to the proxy. Somehow this all does not fit
>> together.
>
> Clarification : Both clients A and B have the proxy as an ou
Klaus,
Thanks for your continued help.
How? Does it change the Contact header?
Yes, the proxy changes the Contact header.
So the SIP server is the registrar?
Correct.
The contact usually is the IP address of the client. So, if you the SIP
server routes based on the contact header, it sh
Am 19.01.2011 18:21, schrieb Vikram Ragukumar:
Klaus, Alex,
Thank you for your replies.
Does the SIP server perform NAT traversal?
Does the SIP proxy perform NAT traversal?
The SIP proxy performs NAT traversal.
How? Does it change the Contact header?
How does the SIP server route th
Klaus, Alex,
Thank you for your replies.
Does the SIP server perform NAT traversal?
Does the SIP proxy perform NAT traversal?
The SIP proxy performs NAT traversal.
How does the SIP server route the INVITE requests? Does it route based
on registered Contact or does it route them statically
Am 18.01.2011 20:27, schrieb Vikram Ragukumar:
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.
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
wrote:
Hello,
Alex, Klaus thank yo
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 ser
When A places a call to B, an INVITE is proxied to the Sip Server from
A. The Sip Server now sends another INVITE to the proxy, however the
R-URI of this INVITE does not contain the port number that the INVITE is
supposed to be sent to. Hence the proxy sends the INVITE to the default
SIP port 5060
Vikram,
1. The port is not mandatory.
2. You can force the port in the RURI explicitly by manipulating the
mutable pseudovariable $rp prior to relay,
E.g.
$rp = 5067;
--
Alex Balashov - Principal
Evariste Systems LLC
260 Peachtree Street NW
Suite 2200
Atlanta, GA 30303
Tel: +1-678-954-06
Hello,
The diagram below shows the SIP message flow in our setup when Softphone
A places a call to Softphone B.
--- - -- - ---
|Softphone A|-<->-|Proxy|-<->-|Sip Server|-<->-|Proxy|-<->-|Softphone B|
--- - --
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