AG215S module user guide / login information

I have an 5G+CV2X evaluation board. This setup has following components.
AG550Q, AG215, AF50T and Ethernet

Can anyone provide the user guide for AG215S-CN module. I am trying to login to system using DBG UART without much luck.

See ‘systemctl status init_audio.service’ for details.
[ OK ] Stopped Audio Init Service.
Starting Audio Init Service…
[ OK ] Started Audio Init Service.
[ OK ] Started diagrebootapp service.
[ OK ] Started powermanager-daemon Service.
[ OK ] Started udev Coldplug all Devices.
[ OK ] Started ethpwrmgr service.
[ OK ] Found device /dev/ttyMSM0.
[ OK ] Started Serial Getty on ttyMSM0.
[ OK ] Reached target Login Prompts.

auto 1647 sa515m ttyMSM0

sa515m login:

Any help?

sa515m login: root