ZyXEL Communications P-660R-D Series - Manual (Page 25)

P-660R-D Series User’s Guide
Chapter 1 Getting To Know Your ZyXEL Device 24
C
H A P T E R
1
Getting To Know Your
Z
Y
XEL
D
E V I C E
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 “D” denotes a chip
set standard.
Your ZyXEL Device product name ends with a number. Models ending in “1”, for example P-
660R-D1, 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.