Hi. I'm hoping someone can give me some advice. I am working with a firm that has a "call forwarding" service that they want to start. The service application is written on top of VoIP and SIP. What they would like to do is register a number of DIDs that they will provide to their subscribers. When the DID is called, they will forward the call to the user's "real" phone number based on a number of factors, time of day, etc.
The issue that I'm running into is this. In VoIP, this looks like 2 calls to the service providers that we're talking with. They want to charge us for the DIDs, the inbound call, and the outbound call. I know in SS7/ISUP you could do a call forward, and this would remain 1 call -- not 2 calls.
Does anyone have any suggestions as to the best way to get around this? Paying 2 call charges plus the DID for ALL CALLS is going to kill the business model.
Thanks,
William