No voice from my ip phone

[ashwingorityala]

I've successfully registered and Provisioned the phone, but there is no voice on both sides

Phone: yealink T31G

 

[Saqqara]

Please provide info on the setup - https://www.3cx.com/community/threads/information-to-provide-when-requesting-help.67558/

Any network vlans involved

 

[ashwingorityala]

• 3CX Version, 18.0 (Build 315)
• Server OS, WIN 10
• Is the 3CX Server Hosted and where? On-premises
• IP Phone Make/Model/Firmware version, e.g. Yealink T31G version 124.86.0.40
• Provisioning Method: STUN
• Trunk Provider or VoIP Gateway Make/Model, SIP-Trunk
• Has the Firewall Checker passed: YES
• Are custom Phone Templates being used: NO
• No VLAN configured

Account gets registered on the IP Phone, calls are working fine, but to voice

 

[Saqqara]

See your issue, you have configure the phones as stun , as the phones are on the same network as the 3cx server you need to use local

Delete the phone configuration within 3cx , under users , provisoioning - select the phone and delete

factory default them and follow the steps from 3 in https://www.3cx.com/sip-phones/yealink-t32g-t38g-t42g-t46g/

Make sure the phones are running the correct firmware, links in the url posted above

 

[ashwingorityala]

I'm trying to config telephone outside the network

 

[Saqqara]

You need to configure the phones using the 3cx supported way

Each phone requires a block of 12 rtp ports -look at limitations https://www.3cx.com/sip-phones/yealink-t32g-t38g-t42g-t46g/

If you have a number of phones at the same location, save yourself a lot of hassle and install a sbc server https://www.3cx.com/docs/3cx-tunnel-session-border-controller/

 

[JohnS_3CX]

If you do not have control over the firewall on both the PBX side, and the phones side, don't waste time on STUN.

Just install an SBC as mentioned above and it will make your life a lot easier.