Snom 760

[Arne Larsen]

I have a snom 760 on my free 3cx, i can call it, but it will not call from it?
it is on another network, not intern

 

[Saqqara]

How have you provisioned the phone - check out https://www.3cx.com/sip-phones/snom-710-720-760/#h.kaj5m6i41no9

Have you opened the correct ports on your firewall as the phone is remote ? Does the firewall check pass ? - https://www.3cx.com/docs/manual/firewall-router-configuration/

 

[Arne Larsen]

i have 3 phones extern also

 

[IoannisM_3CX]

Hello @Arne Larsen,

Please tell me:

• How were the phones provisioned? STUN or behind an SBC
• Are two or more of these phones behind the same remote network?
• If as STUN, have you specified dedicated RTP and SIP ports for each one of these devices?

Please advice

You can check what's going on by taking a wireshark capture at the time you are trying to initiate an outbound call and see what is blocking your traffic

Since the issue is possibly that it's occurring at the phone's network, it's for better practice to take simultaneous captures,from the PBX side as well as from the phones' side

Guide on how to use wireshark: https://www.3cx.com/3cxacademy/videos/advanced/basic-troubleshooting/

How to provision Snom 760: https://www.3cx.com/sip-phones/snom-710-720-760/

 

[Arne Larsen]

now i get this error on the phone: No more media ports available

 

[YiannisH_3CX]

You need to provide us with some details regarding your installation and how the phones are provisioned to able to assist you. Please make sure that you provisioned the phones using the provided guides and let us know of the installation details requested

 

[Arne Larsen]

We found out that RTP Encryption:was on, but when it was set to off, it worked