i’ve followed the Quectel_EC2x_EG9x_Voice_Over_USB_and_UAC_Application_Not_V1.0.pdf to enable UAC on my RM502Q-GL (fw version: RM502QGLAAR11A02M4G).
Using AirScreen tool, on the DIAG port I can see that VoLTE is successfully registered, but if i’m trying an inbound call I got:
SIP Invite
SIP 100 - Trying
SIP 486 - Busy Here
So looks like that the module itself doens’t permit to answer the call. I’ve also tried to put it in WCDMA mode, and still no way to get a call. Trying an outgoing call with ATD command give me “NO CARRIER” error (both LTE/CS mode).
Interesting part is that and incoming call (both LTE/CS mode) doesn’t generate “RING” urc on AT port.
May i’m missing something special, or is a problem of the firmware that i’m running?
Dear @stich86
Do you install the driver? Please don’t follow the steps of LTE module. They have different AT command. Interesting part is that and incoming call (both LTE/CS mode) doesn’t generate “RING” urc on AT port.
=>For this, you need to check the urc port via AT+QURCCFG=“urcport”.
Your firmware didn’t the latest firmware, please contact with your provider and get the latest one.
i want to start experiment again with this module and Voice.
Do you have update documents to enable it? Because you said that commands are different from LTE variant.
So… just to understand and have an official reply from Quectel: Does these modules support voice?
IMS is registering, UAC can be enabled, but module refuses to receive/make calls…
so after I got RM502QGLAAR11A02M4G_01.200.01.200 from a friend, the module now generate the correct output but… when an incoming call is received (over VoLTE) ATA command doesn’t work.
If i switch voice domain over CS Only with the command AT+QNWPREFCFG="voice_domain",0 it will respond…
and UAC is not working as expected, no audio is coming from the NMEA port