I am assuming that you have a Analog FXO card where the calls are coming in. If that is the case, then you cna use connection plar under the voice port to send the call to a destination number as soon as it comes in.Taimoor
You can use the same applicaiton on the pots o on the voip peer. Only catch is if its on the voip peer, the audio files need to be encoded in the same format as the codec of the call.
Make sure the file music-on-hold.au is in the flash and that it is encoded correctly. It needs to be a PCM 8 bit khz stream. When you say you need to configure IVR on the ITS gateway, you mean you need to invoke a tcl applicaiton on the inbound calls...