way to call through Huawei Modem in 14.04 E303
I have a huawei e303 u modem, I followed a guide from this link. Everything is working except calling features.
Call goes to other end but no voice OR vice versa.
I mean , when somebody calls me, it shows on the dashboard. When I receive, no sound from either end. I mean, balance deducts, timer shows call duration on dashboard. But no sound from either receiving or transmitting end.
Solution 1:
This is how i made phone call from my Huawei modem K3772 on Ubuntu zesty using AT commands.Voice is working and i can also recieve call. I assume that your modem has voice capabilities and could make call on Mobile Partner in Windows
- insert your dongle into pc and should be detected by Network manager applet
2.Find out the various ports of the modem:
ls /dev/ttyU*
usually, the dialogue port (ie 1st port) is /dev/ttyUSB0, audio port (ie 2nd port) is /dev/ttyUSB1 and sms & internet aka data port (ie 3rd port) is /dev/ttyUSB3
- install picocom:
sudo apt install picocom
- start picocom on the dialogue port:
sudo picocom -c /dev/ttyUSB0
the -c means local echo on, making AT commands visible as you type
find the audio sample formats supported by your modem:
AT^CVOICE?
A reponse of 0,8000,16,10 means the rate is 8000hz
open another terminal and enable audio:
sudo cat /dev/ttyUSB1 | aplay -f S16_LE
open another terminal and enable microphone:
sudo arecord -f S16_LE /dev/ttyUSB1
the audio sampleformat, S16_LE is 'Signed 16 bit Little Endian', Rate 8000 Hz, Mono it depends on the response from AT^CVOICE? other modems may require S16_BE
go back to the first terminal and dial the number:
ATDxxxxxxxxxx;
eg: ATD024698xxxx; OR ATD100;
from the same dialogue terminal he route audio:
AT^DDSETEX=2
you should now hear sound from your speakers and you can also speak into the mic
after you are done with your call, you can hangup with:
AT+CHUP
if you want to keep you modem online so you can recieve calls, then keep both terminals open You can recieve call with
ATA
followed by AT^DDSETEX=2 to enable sound
To stop picocom:
ctrl+a followed by ctrl+x
The mmcli developers are trying to implement it in ModemManager.I think work is still on going. maybe modem-manager-gui might also implement voice someday
tIP:-if you hear scratcy sound instead of human voice, change S16_LE to S16_BE.This is the sample format. other sample formats can be gotten from aplay --help
reference: mmcli Huawei voice