Model: CreditCard Ethernet+Modem Adapter 28.8 Cellular
Operating System: Not Specified (Note: might work with other versions of this os.)
"Models covered CM28, CEM2, CEM28 (US and Canada).
Does NOT Support International CEM28, original CreditCard Ethernet+Modem Adapter
This self-extracting archive file contains a Cellular flash upgrade for the product.
YOU MUST PURCHASE THE CELLULAR KIT FROM XIRCOM SALES (part no. CCK-MOT) AT 800-438-4526. IT INCLUDES A CABLE WHICH IS REQUIRED FOR CELLULAR SUPPORT.
Please read README.TXT for IMPORTANT information regarding programming of your cellular phone!"