Android (and Iphone) apps register OK but outgoing calls drop and incoming have no audio

[sakkask]

Issue has started 2-3 weeks ago, maybe longer as we do not use the mobile apps a lot.

Self hosted 18.0.9.20 with Android app 20.0.0.32.

Ports all seem to be open OK, firewall checker returns green. IP phones and softphones work ok - internal LAN.

When making an outbound call from App we just hear a Line busy tone (few short tuts) and then the App shows "Disconnected" and ends the call.

 

[Gbot@Okam]

Hello @sakkask
Can you check if your 3CX server has an IPV6, and if that's the case, if all the rules you've made in the firewall for IPV4 have been done for IPV6 too ?

 

[sakkask]

Hello @sakkask
Can you check if your 3CX server has an IPV6, and if that's the case, if all the rules you've made in the firewall for IPV4 have been done for IPV6 too ?

No IPV6 in use. I'm slightly inclined to think it's a compatibility issue of V20 apps with V18 server instance, but I would have expected more people to be facing the same problem in that case.

 

[sakkask]

Indeed after updating to V20 the mobile apps work. Still V20 is causing other incompatibilities with "legacy" systems.