I need to add background sound (sound like "beep") to the call that taking place (in CUCM or CME) and the sound must be recorded when the calls are recording. The calls are from outside (from pstn). Is there anyway that I can do it.
In CM, you can use the Annuciator service (I think).
In CME, the B-ACD prompts.
It also depends on the call flow, at which point the announcement has to be played.
CME and CUMC will not do that.
The recording platform that I use, supports file digital watermarking to proof against tampering.
You should ask your recording platform vendor for the same.