[LukasCX]

I have an interesting situation in which the tone dialing does not work, here are some example scenarios:
it happens at the moment of connection to the Gateway Grandstream GXV4108 and when calls are recorded.


Scenario 1
- I start recording conversations on the internal number 555
- Calling from this number on which the recording was included on a hotline where you'll be able to use tone dialing, for example tp.sa (to connect to the department that select "2", with another department, select "3")
- Dial tone is not working

Scenario 2
- Disables call recording on the internal number 555
- Calling from this number on which the recording was included on a hotline where you'll be able to use tone dialing, for example tp.sa (to connect to the department that select "2", with another department, select "3")
- Tone works


LOG:
(only when the conversation is being recorded)

11:34:42.418 [MS211000] C:127.1: 192.168.77.33:16384 is delivering DTMF using RTP payload (RFC2833). In-Band DTMF tone detection is disabled for this call segment.

[LukasCX]

OK, problem solved
In the phone configuration, tab Ext1,
I changed the setting DTMF Tx Method to "InBand",
and then the tones are transmitted