Click the Connect button. If successful, you’ll see a message indicating the port is open.

Some modems have voice capabilities disabled by default in firmware.

If you've specifically mentioned huawei modem terminal.exe , it's likely a software tool provided by Huawei for managing their modems. Here are some steps:

You can use these commands directly in the terminal to manage your device: AT Command Expected Result AT OK Check SIM Status AT+CPIN? +CPIN: READY Network Registration AT+CREG? +CREG: 0,1 (Registered) Check Signal Strength AT+CSQ Displays signal level (0-31) Set SMS Text Mode AT+CMGF=1 OK Send SMS AT+CMGS="phoneNumber" Followed by message text and Ctrl+Z Read All SMS AT+CMGL="ALL" Lists all stored messages Troubleshooting & Advanced Tools