AT Command interface Telnet

You can enable AT command interface on port 23-telnet by calling

client.device.mode(ModeEnum.ENABLE_TELNET)

Then you can connect to port 23 using command

telnet 192.168.8.1 23

What will you get is AT command interface here you can run commands like ATI:

ATI

Manufacturer: huawei
Model: B310s-22
Revision: 21.311.06.03.55
IMEI: XXXXXXXXXXXXXX
+GCAP: +CGSM,+DS,+ES
OK