I looked at the Dev ID and Ven ID and found the correct driver on PCIdatabase.com and applied that driver to all of the devices (since they all had the same vendor and device IDs). It was a specific modem. Now, I have 8 modems listed in the device manager.
That's not even the worst part. One of them suddenly changed its Device ID and Vendor ID, twice! I checked the new IDs in PCIdatabase.com but there were no corresponding vendors or devices.
This is the device details of one of the ones I applied the modem driver to:
This is the one that changed:
Before the vendor ID was 0041 it was 0040, and before that, it was 14F1.
Before the device ID was 8290 it was 2702.
Edited by InuYasha, 22 April 2012 - 02:24 PM.