Unable to come out of ppposInit() function

[GunashekarG]

OS: Ubuntu Mate(20.04)
MCU: ESP Wroom 32
ESP-IDF version: ESP-IDF v4.3-dev-2586-g526f68239
Example: ESP32 PPPOS example

Hello, I am connecting Cavli C10AM(LTE module) with ESP32 and trying to execute the pppos example code. After GSM initialization is done, the function ppposInit() is called from the main function. If everything is fine the return value from that function is supposed to be 1 and everything should be fine. But, for some reason I am getting 0 as the return value and not able to go further with my development. I had tried debugging the ppposInit() from the libGSM.c library, but no luck in finding out why I am not getting proper return response.

The connection is a typical UART connection and basic AT commands are sent and getting correct responses and LTE module is been initialised properly.

If you know why this thing is happening, please help me with the solution. Hoping to hear from you soon.

[theElementZero]

Supported modems are:
SIM80x series
BG9x series
SIM7x00 series