Yealink T48G - 3CX - Call From Queue

[Headon_Support]

Hello,

we have a little Problem at a customer’s place.
We’re using the newest 3CX Version together with yealink T48G Phones on the 3CX recommended Firmware.

The Problem is the following:

When a call from external comes to the 3CX and rings in a call queue to about 7 phones, the have a massive interupt in the Audio for about 1,5 seconds.

When a call from external directly to the phone, everything is fine with the audio.

We traced that case and saw, that the phones send the audio to a completly wrong IP Adress (192.168.173.2).
The internal IP Range is the following:

10.1.13.150 3CX
10.1.13.151 Beronet ISDN Gateway
10.1.13.90 Yealink Phone from the trace

We don't know where this IP Address is coming from.
We tested the same case with a snom phone, everything works perfect.

Do you have any ideas, what the problem is?
Traces attached (Beronet Trace is in the folger, tcpdump, you can open it with wireshark too.

Thank you very much in Advance.

BR
Daniel

[CWR]

does you r 3cx server have 2 nic cards?

[tsukraw]

I don't see the attached trace.
Could you re-post it?

[Headon_Support]

Sorry , forgot to Upload the attachment.

The ISDN Card is a PCI-e Card. This Card gets found as Network Device in the Windows.
But we have this configuration working with about 50 3CX PBX's

Thank you very much for your help!