I’m using an EG25-G for data, SMS, and Voice with the voice over USB.
The only document I can find near that topic is the UC20 Voice over USB Application Note and of course the EC2x AT commands reference.
I am using the NMEA port for voice/usb and it works but not reliably.
Most of the time it takes about 9 seconds for audio from the modem to be recognized by the remote usb end
About half the time by USB receiver gets nothing but static.
Occasionally it works perfectly.
- Is there an EG25-G voice over USB document? If not maybe for the EC25?
- Is it better to use the NMEA port or the debug UART?
- If there is no documentation can you tell me how I should configure the remote USB device port? e.g. baudrate?
- Do you have any idea what might be causing this?