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Detect incoming calls

I would like to detect incoming calls in a gsm modem.

I am developing an application in VB and I am interested in detect them.

I have a Nokia 22 modem connected with my pc and I am using Hyperterminal to connect with it.
What I want to do exactly is that when the modem will be receiving a call, hyperterminal show me something to indicate me that the modem is ringing.
I want too, to detect when a called is missed.Are there any list where I can check them?

The modem is well-connected because I can send and receive messages, but when I receive a voice call the modem doesn't attend anything.

2 Solutions
When u receive a voice call,RING appears on the hyperterminal,I suppose u r familiar with it, bu then u have to answer the calll using the ATA command, then u can receive the voice call.

as far as receiving the ring in a program u can create a seperate thread and wait on the com port for the ring or any incoming sms
The modem is probably configured to detect/accept data calls only. Try chanding the call mode. More details can be found in the AT commands guide at http://nds1.nokia.com/phones/files/guides/22_list_of_at-commands_en.pdf

Good Luck!
Based on your settings you will get the message:
- Ring data
- Ring voice
- Ring fax
The ring indicator will start to toggle by voice, data or fax call. From my side to have a look on the messages that comes in is the better way.

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