Seeking Modem Pool Dial-out Solution on Windows Server

I have a customer who has 300+ devices that have standard dialup modems connected to them.  They dial in to each of them for 5-10 minutes to collect some data from a central location, which consists of an old windows NT server with a Digi PCI card that provides 16 serial COM ports, which are then connected to 16 external US robotics modems.

Surely there is a better way to do this?

They need to replace the old Windows NT server with something running windows 2003 server.  The application has been tested on Windows 2000-2003, and works.  

Is there a PCI card that has ... like a T1 interface that could be used instead of 16 pots lines and 16 external modems?  I have had no luck in searching, but it's very possible I just don't understand all the acronyms on many hardware vendor sites.  I'm not sure what to search FOR even.

Any suggestions on how to better solve this is what I am looking for.  They do eventually plan to go to IP to the 300+ devices, but for right now, they need a solution that uses the existing pots dialup lines at the 300+ sites.
mrmystery44Asked:
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meko72Connect With a Mentor Commented:
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mrmystery44Author Commented:
The solution we used was a Diva board made by Dialogic.  Did exactly what we needed.
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