I have a similar issue.
Basically, I want to be able to call into the system using a VoIP line. This then gets picked up (recognises my mobile number, for instance) and allows me to make another international outgoing call using much cheaper VoIP rates for international calls than the ones provided by my mobile phone operator.
An additional plus would be the option of instead of ending the external VoIP call by hanging up to be able to press some keys and have a new dial tone for a new international call.
Can IVM support this functionality? If so, what's the best option?
Is anyone else using this kind of system? Thanks for your thoughts. 