P-660R-F1 Series User’s Guide 19
CHAPTER 1
Getting To Know Your ZYXEL
D
EVICE
This chapter describes the key features and applications of your ZyXEL Device.
1.1 Introducing the ZyXEL Device
The ZyXEL Device is an ADSL2+ gateway that allows super-fast Internet access over analog (POTS)
or digital (ISDN) telephone lines (depending on your model).
In the ZyXEL Device product name, “R” denotes an integrated router and “F” denotes a chip set
standard.
Your ZyXEL Device product name ends with a number. Models ending in “1”, for example P-660R-F1,
denote a device that works over the analog telephone system, POTS (Plain Old Telephone Service).
Models ending in “3” denote a device that works over ISDN (Integrated Services Digital Network).
Models ending in “7” denote a device that works over T-ISDN (UR-2).
Note: Only use firmware for your ZyXEL Device’s specific model. Refer to the label on the
bottom of your ZyXEL Device.
