Voice Call

In ATCommander the following tab/UI is available for making voice calls:

Dialing a number:

ATD123456789;
OK

Note: you MUST type a ; character after the number.

Once the called number is answered, the device should establish a voice call. For a SIM900 shield, ensure to have a microphone and a headphone connect to the P2 jacks so you can really talk to the calling person!

To hangup the call, send the hang-up ATH command.

ATH

The voice call will be ended after the hang-up command is sent. The device will be go back to monitoring the network state.

Answer voice call:

If you need to find out the phone number of the device:

AT+CNUM
+CNUM: “Line 1?,”+1858#######?,145
OK

Call the phone number using another phone. The terminal should indicate the incoming call through the RING alert.

Answer the phone call by issuing the ATA command in the hyperterminal.

RING

RING

ATA
OK

To hangup the call, send the hang-up ATH command.

ATH