If your Kamailio setup is close to vanilla, it should do it by default. But Kamailio is a very powerfull tool, it can easily be setup to stop passing over ACKs :) 

To attempt to answer what explicitly sends along the ACKs, that will most likely be the t_relay function, together with the logic which went before it… 

A good old tcpdump will most likely enlighten us. 

Op 12-aug.-2014, om 14:39 heeft Rahul MathuR <rahul.ultimate@gmail.com> het volgende geschreven:

Hello Davy,
 
Thanks for writing back..
 
Tonight I'll take the tcpdump on Kamailio box and share the file.
 
Please note that Kamailio and Freeswitch are both on public IP & at Freeswitch param, enable_timer=false is set.
 
Is there any explicit way wherein ACKs can be transmitted to FS ?
 
 
Thanks in advance !


On Tue, Aug 12, 2014 at 1:15 PM, davy van de moere <davy.van.de.moere@gmail.com> wrote:
Are you sure you're getting the ACK correctly to FS?

FS typically has this behavior when it did not correctly receive a confirmation of an answer, and after 30 seconds disconnects, as for FS the call has failed.

Do you have a trace of the packets?

grtz,
Davy Van De Moere


2014-08-12 13:37 GMT+02:00 Rahul MathuR <rahul.ultimate@gmail.com>:
Hello,
 
I have an iPhone/Android/Windows 8 based UAC, proxy server Kamailio and Sip server FreeSwitch.
Whenever I call directly from UAC to Sip server, the call gets established for as long as I want, however when I use the proxy in between, it gets disconnected within 30 seconds. It seems that FS sends a BYE within 30 seconds.
 
I would really appreciate if anybody please guide me where I am going wrong in this case ?

--
Warm Regds.
MathuRahul

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--
Warm Regds.
MathuRahul
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