Re: [Serusers] How SER communicate to other SIP server - sr-users

9 Jul 2007

Hi, Szasz!

I found that both UAC are only sending out packets but didn't receive any
packets from either party. For instance, softphone A only send packets to
serverA whereas softphone B only send packets to serverB. 

Is there any other settings that I need configure as well? Which firewall
settings that I need to check (server/client)?

Thanks.

Roa Yu

-----Original Message-----
From: Szasz Szabolcs [mailto:sszasz@digicomm.ro] 
Sent: Monday, July 09, 2007 4:40 PM
To: roayu
Cc: serusers(a)lists.iptel.org
Subject: Re: [Serusers] How SER communicate to other SIP server

Hi!

See your firewall settings, probably you don't allow to forward the RTP 
packets.

Szasz Szabolcs

----- Original Message ----- 
From: "roayu" &lt;roayu(a)ctisys.net&gt;
To: "Olaf Bergmann" &lt;Olaf.Bergmann(a)freenet-ag.de&gt;
Cc: &lt;serusers(a)lists.iptel.org&gt;
Sent: Monday, July 09, 2007 11:12 AM
Subject: Re: [Serusers] How SER communicate to other SIP server

...
  Hi, Olaf!

 I managed to call to the other SIP server. Unfortunately, both sides can't
 hear anything. What could be the problem? Could it be the NAT issue? If 
 so,
 where should I allocate them to use the mediaproxy(before/after
 rewritehostport())?

 Thanks.

 Best regards,
 Roa Yu

 -----Original Message-----
 From: Olaf Bergmann [mailto:Olaf.Bergmann@freenet-ag.de]
 Sent: Wednesday, July 04, 2007 2:14 PM
 To: roayu
 Cc: serusers(a)lists.iptel.org
 Subject: Re: [Serusers] How SER communicate to other SIP server

 roayu wrote:
  Hi, Olaf!

 From what I understand about forward() is that it
will forward the 
request  to the given destination statelessly. Whereas for t_relay(), it will 
 relay  a
  message to the destination stated in current URI
statefully. How do I get
 the URI to point to the other SIP server by using t_relay() as I couldn't
 assign any IP address for t_relay(). I managed to assign an IP address by
 using forward().

 I tried to use both. Unfortunately, I still failed to forward the message  to
  the another SIP server to establish the call. Is
there any functions I  need
  to use before using either those 2 functions?
FYI, I will only call them
 when it starts to INVITE. 
 482 Loop Detected

 The function you are looking for is called rewritehostport (or
 rewritehost, if you like). But you could also use
 t_relay_to_{udp,tcp} to specify a literal transport address where
 you want your request being routed to.
 <http://www.iptel.org/ser/doc/search> gives more information on
 these functions.

 Regards,
 Olaf
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