With V.42bis compression, speeds up to 460,800 bps can be achieved. The Duo supports standard AT commands, so it works with virtually any PC communications software. It requires only one PC slot and one COM port. No additional hardware is required. Both products include ZoomGuard TM , which provides lightning protection superior to the varistor protection found on many similar products.
Lightning is the number one cause of modem failure.
Zoom Telephonics designs, produces, and markets products that link people and their personal computers through the world's largest network, the international telephone network, and connected networks including the Internet and corporate local area networks. Zoom products are distributed worldwide.