One way audio

[Tomer]

Hello,
Once i'm doing the calls between app's everything is working fine.
Once i'm trying to work with call to deskphone (GXP1615 Grandstream) from the app- there is no audio for incoming calls to the Grandsteam, outgoing calls are working and both sides can hear, but call is getting disconnected after every 30 seconds.
Please advise.

 

[JohnS_3CX]

Hi Tomer,

Please provide some more information first like described here:
https://www.3cx.com/community/threads/information-to-provide-when-requesting-help.67558/

 

[leejor]

Suspect several sets, using STUN, behind a router....which doesn't always work correctly, even if each set is assigned a unique local SIP port. Could try "PBX delivers audio" option, on each extension, or the use of an SBC at the site

 

[eddv123]

One way audio issues are mostly always a networking issue (firewall most likely) so first be aware of the ports that are required, and as @JohnS_3CX says provide more information in regards to setup.

https://www.3cx.com/docs/ports/