[Kamailio-Users] Maximum retries exceeded on transmission

[Jon Farmer]

Hi

I am getting this dreaded error on a asterisk box when call from one
UA to another using Asterisk as a media relay and openser as a SBC and
proxy.

chan_sip.c:3779 retrans_pkt: Maximum retries exceeded on transmission
1310650592 at 10.100.0.101

 If I make a call from a UA to the PSTN through Asterisk all is
fine. This only happens when calling from one UA to another on the
same LAN.

I have posted an example sip trace here http://pastebin.com/m2262b0ef

My openser.cfg is here http://pastebin.com/d5e84aaf7

I realise this is a issue with Asterisk but I have not been able to
find a fix. Therefore I figure there might be something I can do on
openser. The problem seems to be with a ACK not being returned but my
SIP knowledge is not good enough to know how to fix it. Any help is
greatly appreciated.

Regards

Jon
-- 
Jon Farmer
Tel: 07795 118140
Email: viperdudeuk at gmail.com
Twitter: @viperdudeuk