
P-661H/HW Series User’s Guide
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CHAPTER 1
Getting To Know Your ZyXEL
Device
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, secure Internet access over
analog (POTS) or digital (ISDN) telephone lines (depending on your model).
The ZyXEL Device is compatible with the ADSL/ADSL2/ADSL2+ standards. Maximum data
rates attainable for each standard are shown in the next table.
" If your ZyXEL Device does not support Annex M, the maximum ADSL2/2+
upstream data rate is 1.2 Mbps. ZyXEL Devices which work over ISDN do not
support Annex M.
" 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.
The ZyXEL Device is a Triple Play gateway, capable of simultaneously transferring data,
voice and video over the Internet. The gateway possesses advanced Quality of Service (QoS)
features to provide a high standard of Triple Play delivery.
Table 1 ADSL Standards
DATA RATE STANDARD UPSTREAM DOWNSTREAM
ADSL
832 kbps 8Mbps
ADSL2
3.5Mbps 12Mbps
ADSL2+
3.5Mbps 24Mbps
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