SIM900 accepting a call, AT-commands HELP HELP HELP

Hi guys.

I'm working in a project that involves Arduino UNO + SIM900 to control few appliances like lights and fans by sending SMS and calling the SIM900.

MY question is:

Is it possible to use AT-commands to accept the call from only specific number and rejects any calls from another numbers?

in other words, I need the SIM900 to accept only my calls.

Please HELP me.

Thank you

unfortunately; you can only listen for a RING signal and reject numbers you do not know - no way of building a "filter" for incoming calls - however, you can block all incoming calls completely :)