Fanvil X4U-V2 DTMF Issues

[teetotal_mike]

All of our Fanvil X4U-V2 and X210-V2s are showing firmware version 2.12.26.4 as an available update from the current version 2.12.25.6.

I rolled this update out to a few handsets to test, but it appears to stop DTMF working.

All settings appear to be the same as other phones on the older firmware (type RFC2833, payload 101 etc.).

The issue persists after reboot/factory reset and a forced reprovision.

Has anyone else experienced this?

 

[NikosT_3CX]

@teetotal_mike if you make a call from these phones which are extensions to the PBX, to an internal IVR and
select an option do you have the same issue ?
Or this occurs only to external calls ?

 

[teetotal_mike]

It's all calls.

The issue was highlighted when a user couldn't access their voicemails, as the PIN wasn't being "entered".

We tested this with an internal IVR and an external also, with the same results.

We manually rolled back the firmware on these devices, and they are working as expected again.

 

[JohnS_3CX]

Hi Mike,

I have an X4U-V2 here running 2.12.26.4 and when making calls to voicemail, or an IVR, or conference,the digits are recognized and do work fine in my case (all digits possible).

Could upgrade one of them again, then factory reset and reprovision? (in this order)
Just to make sure the default settings of the phone are set correctly.
Make sure you are using the default template, not a custom one.

 

[TimH_CBM]

This problem seems to be related to G.722 codec. I recreated it with the X4U-V2 default template, but then adjusted G.722 as the priority #1 codec and the problem showed.

 

[JohnS_3CX]

Thanks Tim and Mike, that's the one. We have escalated this issue to the manufacturer but in the meantime, best switch to G.711 to maintain DTMF functionality.