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TDM in TDM out


I have a Cisco VoIP gateway from my carrier which I can't manage, and requires me to provide only TDM interface from a PBX. I provide two stage dialing from my PBX to my subs.

I was wondering if there is a way that I can use a Cisco based solution for providing Pre (or Post) paid calling card solution with the same carrier.

In other words I want a Cisco Gateway with VWIC cards one connected to the CO and other connected to the Carrier VoIP gateway. It is little odd, but reason I have to use this because I can't control the VoIP gateway which I know could do this thing by itself.

Are there any other PBXs which provide this service, we are currently using one from Altigen, which is kind of limited in its capabilities.

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