DTMF issues with Snom (again)

[denko2k]

Hello!

A few days ago I posted this issue:
https://www.3cx.com/community/threads/dtmf-issues-with-snom.55196/#post-228225
With firmware 8.9.3.87 for our Snom phones the DTMF issue was solved.

Now, a new firmware is out: 8.9.3.88 and we have similar issues again.
(Snom D715, D725, D765)

DTMF works but it is delayed. If I press a button, the DTMF signal is delayed for about 10 to 15 seconds. If I press DTMF keys several times in succession, you will not hear anything at first (no sound will be sent). Then suddenly all sounds are sent at once.

Sometimes it works still fine. Sometimes with delay.

Please help!

 

[leejor]

Have you approached Snom, given that it would appear to be firmware version related?

 

[denko2k]

Yes. For Snom is 8.9.3.80 the stable release. But 3CX ships 8.9.3.88

 

[Eric Jan]

I can confirm, since the upgrade to 8.9.3.88 through 3CX our Snom D305 no longer send DTMF Sounds. After rebooting the phone the sound is audible, but seems not to be recognized at the other end.