voicecall via LTE internal modem

[Eri <enricocas@gmail.com>]

I'm using Debian Bullseye on a Thinkpad T490s with FIBOCOM L830-EB-00 WWAN modem.

I would like to know if it is possible to make voice calls with that modem.

I was able to make a phone call with AT COMMANDS

ATD + NUMBER;

or answer

ATA

Tha user manual of the modem says that voice calls are allowed, but I can not find a way to have audio.

Using mmcli with

mmcli -m 0 --voice-status

I get:

error: modem has no voice capability

Anyone has better experience?

Thanks,

Enrico Maria Casarotti