By default the transaction that gets a final reply is kept for another 5sec or so in memory to deal with retranmissions, etc ... There is a wait_timer parameter in tm module.

The ACK after 200ok is separate transaction and has no influence on INVITE transaction. For the ACK after 300+ reply, there should be some retransmissons of the reply in the INVITE transaction.

The dialog module is influenced by the missing ACK after 200ok.

Cheers,
Daniel

Sorry i didn't specify.

It is after the 200 Ok. Will it be different in a reply greater than 300?

Best regards

A segunda, 13/04/2020, 12:16, Daniel-Constantin Mierla <miconda@gmail.com> escreveu:

Hello,

is it about ACK after 200ok or the ACK after 300 or greater reply?

Cheers,
Daniel

On 13.04.20 13:04, Duarte Rocha wrote:

Greetings,

How much time will Kamailio keep a transaction active if the ACK to a INVITE is never received by Kamailio?

Best Regards,

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-- 
Daniel-Constantin Mierla -- www.asipto.com
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-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda