ZyXEL Communications P-661HW User Manual

P-661H/HW Series User’s Guide

Chapter 1 Getting To Know Your ZyXEL Device

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This chapter describes the key features and applications of your ZyXEL Device

.

The ZyXEL Device is an ADSL2+ gateway that allows super-fast, secure Internet access over 
analog (POTS) or digital (ISDN) telephone lines (depending on your model). 

In the ZyXEL Device product name, “H” denotes an integrated 4-port switch (hub) and “W” 
denotes an included wireless LAN card that provides wireless connectivity. 

Models ending in “1”, for example P-661H-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.

The DSL RJ-11 (ADSL over POTS models) or RJ-45 (ADSL over ISDN models) connects to 
your ADSL-enabled telephone line. The ZyXEL Device is compatible with the ADSL/
ADSL2/ADSL2+ standards. Maximum data rates attainable by the ZyXEL Device for each 
standard are shown in the next table.

Note: The standard your ISP supports determines the maximum upstream and 

downstream speeds attainable. Actual speeds attained also depend on the 
distance from your ISP, line quality, etc.

Table 1   ADSL Standards

832 kbps

8Mbps

3.5Mbps

12Mbps

3.5Mbps

24Mbps