I m using pic16f877a micro-controller to run a code to control GSM Sim900 Module.
the code has voice call commands.
My question is to avoid the recorded tone from the network provider when there is a situation occurs(caller is busy, switched off, not reachable etc...)
I m calling three different numbers sequentially.
So, I thought to set a default audio file to play on and to play off the file while the call is answered.
Can anyone guide me regarding this issue.
Please help me as soon as possible..
I m waiting for your kind reply....