SNOM 320 Call Issue

[JCubio]

Hi Experts,

I recently added snom devices to the server. But it's not working properly. Sometimes it works but mostly not.

Setup Details
Server V16 - Hosted on the cloud
Snom devices are provisioned via SBC
Snom Firmware - 8.7.5.48

Known behavior

1. When calling the extension, calls disconnect with the error display disconnected network failure
2. When calling the extension, no rings but get transferred to voicemail.

 

[JohnS_3CX]

Hi @JCubio

The phone says "network failure" so the LAN link is probably dropping.

Find a phone that works without problems, and swap it with the Snom.

If the other phone works ok in the snoms place and LAN cable, but the Snom does not work OK in the good phone's place and LAN cable you can at least isolate the issue being the device

 

[JCubio]

Hi Sir,
Yes, I already tried isolating the issue but it seems the error is random in each device.

 

[JCubio]

Hi,
I think I got it working now. I removed some of the codecs in the snom and left only what's listed in the extension
But still under observation.

 

[JohnS_3CX]

Hi Sir,
Yes, I already tried isolating the issue but it seems the error is random in each device.

If it is random in each device then this is more of an indication that you are facing network issues.

We have no valid reasons to think that the codecs would affect the network connectivity of the phone. Worse case you would get calls and simply have no audio.

What firewall type are you using at the phones site?

 

[JCubio]

Hi Sir,
We're using pfsense.
How can I isolate the network issue properly sir if phones are working fine in terms of ping tests and extensions are successfully registered to the phones?