DTMF not working internally on T84s

[busch]

Hi I have a T84S that does not work on the internal IVR. (i wonder if external callers may have the same issues)
I can hear the Touch tones for the numbers pressed but 3cx ignores them (IVR does not react).
For external calls DTMF seems to work fine
The same works fine with a t46G on the same network
No Custom templates are used and the phone is at the latest Firmware 66.86.0.5 3cx it at 18.0 (Build 450)

The t46 and t48 have seem to have the same configuration parameters in in the extension settings.

Thanks your your help

 

[leejor]

Have you checked to see if the DTMF type is the same on the working and non-working models?

https://www.3cx.com/community/threads/dtmf-issue-with-yealink.86567/

 

[JohnS_3CX]

Hello,

First your should factory reset the phone and reprovision it on the existing extension. If that works, then all good!


If it doesn't work, then try a more basic approach:

1. Delete the phone from the current extension
2. Create a brand new extension, but make sure you leave all the settings default - don't change anything
3. Factory reset your phone, then reprovision it as per the 3CX guide
https://www.3cx.com/sip-phones/yealink-t4-series/

See if the