Unable to hear audio of caller after v16 upgrade

[techies]

Just upgrade a school system to v16. or incoming and outgoing calls we have the same issue. The person you can hear the person but they cannot hear you. I got RM who is the ISP to open all the ports 9000-10999 incmimg and outgoing. The FW checker passes on the ports but fails on SIP ALG but they insist that it is off?

 

[techies]

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03/04/2020 08:48:06 - [CM503003]: Call(C:3): Call to <sip:[email protected]:0> has failed; Cause: 487 Request Cancelled/INVITE from 10.72.240.144:5060
03/04/2020 08:48:06 - [CM503003]: Call(C:3): Call to <sip:[email protected]:0> has failed; Cause: 487 Request Cancelled/INVITE from 10.72.240.148:5060
03/04/2020 08:48:06 - [CM503003]: Call(C:3): Call to <sip:[email protected]:0> has failed; Cause: 487 Request Cancelled/INVITE from 10.72.240.147:5060

 

[JohnS_3CX]

Hi,

We need to disable SIP ALG first as it may be interfering with the audio IPs.

Are internal calls Ok?