If you're just wanting to move the analog phones off of the predictive dialer onto VoIP phones, you could get something like a 2821 with some VIC2-4FXO or EM-HDA-6FXO cards. Then, you could use CME to register some IP phones and point those the FXO ports towards each of the IP phones.
For reference, the ports coming out of the dialer are FXS, and we would need FXO ports to match it. A normal analog phone is equivalent to a FXO port.
There aren't any real high density FXO solutions, so you would probably want to stack a bunch of the VIC2-4FXO or the HDA cards in a 2800. You could then use the 2800 to send those analog calls anywhere on the IP network with a CME box. This would all be one box.
To draw it out:
PRI---Dialer---(Sets of FXS ports)---telephony wiring----(Sets of FXO ports)CME---SCCP---IP phone
You could mix this up if you wanted. If you wanted to put 24 analog phones in India so you don't pay for the IP phones, you could do this:
PRI--Dialer---CME----SCCP over IP to India--VG224--(FXSport)--telephony wiring--- Analog phone
The analog phones on the VG224 would register to the CME that's connected to the dialer.
It would be very simple to map a certain port on the dialer to either an IP phone or analog port on something like a VG224. You can use a 'connection trunk' command to simulate what the users already do.
