[Asterisk-Users] Call dies in 180 seconds exactly

[Me]

I have been seeing some strange problems with our in-house Asterisk system. 
Each of them have slightly different circumstances but I want to focus on 
one in particular.

Here is how the call flowed:

1- Came in via iax.cc from our DID with them to our Asterisk system
2- The caller dialed Zero for an operator
3- Operator answered and transferred the call to one of our internal 
extensions 106
4- Person at 106 answered and started the conversation, voice quality was 
well then after just a few minutes (3 I think) the call hung up!

Person called back, hit Zero again then was transferred to 106 again. Same 
thing call dies after 3 minutes or so.

I looked at the CDR entries for these two calls and two fields/columns of 
the entries got me pretty curious. For BOTH calls under the "billsec" and 
"callduration" fields the value was exactly 180 seconds.

This leads me to believe that somewhere in our system or with iax.cc (our 
origination for the DID) there is some sort of 180 timer set that killed the 
calls.

Any ideas? Any help would be appreciated!

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