Call drop after 15 minutes

[GiannisA]

Hello all,

When i have an inbound call for more than 15 minutes, it's getting dropped. The license we have for 3CX is Professional Perpetual 16.0.619.
SIP inspection is disabled in FirePower.
I have seen in old posts that the server sends an INVITE and the Session-Expires field is configured for 15 minutes.

Can you please let me know how to extend the Session-Expires field?

I can provide, if necessary, a capture from a call that was dropped after 15 minutes and a Firewall check from 3CX.

Thank you in advance

 

[GiannisA]

After we upgraded the 3CX to Professional Perpetual 16.0.1078 , the issue with the dropped calls, it has been resolved. The SIP ALG error remains, but now the calls are fine.

 

[NickD_3CX]

Quite frankly I don't see how upgrading 3CX to Pro would solve this problem, but I am happy to hear that you are no longer facing it!