Wrong! Wrong! And wrong yet again! (Props to Bobby KKK Byrd!)
My what an interesting bunch of hoo hah...

(Watch out when in the cow pasture that you don't step in the hoo hah.)
We have found out from several that this OD modem is based on the CX-06827-11 just the same as two of the other external serial modems I have here. ALL external serial (RS-232) modems are full hardware modems as there is (at the usual 11.52kBytes/sec max) just not the bandwidth on a standard serial port to operate as a softmodem/ Winmodem.
. ALL USB external modems ARE softmodems or Winmodems as there is the bandwidth on USB for it to work - but they are to be avoided as they tend to load down the CPU overmuch.
. The reason that the Windows requirement is listed on the box is just what I said in my last previous post. The drivers and software included (such as terminal/fax software like Bitware) is all for Windows. All of my CX-06827 based modems work fine with DOS, Linux, OS/2, even with the Windows generic driver, etc. And I didn't pay much over $20. for any of them - I haven't spent over $30. on an external serial modem in at least 5 years. I'm hoping against hope that the OD one will be a better implementation of the Conexant design.
. How far the once-decent BestData has fallen that it's modem doesn't work better than the Cendyne branded Amigo generic with the same chip.
. Perhaps I'll complete the grand slam and add the Diamond Supra (now part of BestData) to my collection as this is probably the last generation of RS-232 serial fax/modems. And at $14. you know you can't stop at just one...

. The tide is definitely to broadband and they are even doing away with the legacy serial and parallel ports on the mobos. A big mistake IMO, as they are still very useful for real-time data collection applications.
.bh.
(user of external serial modems since before
300 baud was considered the HOT ticket!)
And just for completeness, MOH does NOT require CID (Caller ID) but it may require what is called "Enhanced Call Waiting" in some service areas. The only time CID is required is if the the software that comes with your modem does CID and you actually want to use that software. But that particular feature is usially only found on PCI soft/win modems.
Most external serial modems are hardwired to ignore the CID packets. .bh.