On Tue, Oct 9, 2018, at 9:11 AM, Abhay Gupta wrote:
> Hi,
> 
> We are having problem with Airtel service provider in India .
> 
> Asterisk sends SIP 200OK —> Airtel responds with ACK but asterisk does 
> not recognises the same . Though the same works with chan_sip 

I see no problem with this. It's not a retransmission, those are two separate 
calls. You can tell based on the Call-ID being different. The first is 
"[email protected]" the second is 
"[email protected]". It appears as 
though the ACKs were handled appropriately. If there is something else then 
you'd need to be more specific about what is happening.

-- 
Joshua Colp
Digium - A Sangoma Company | Senior Software Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - US
Check us out at: www.digium.com & www.asterisk.org

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