ZyXEL Communications P-663H-51, Руководство пользователя, Страница: 25 / 206

P-663H-51 User’s Guide
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H A P T E R
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Introducing the ZyXEL Device
This chapter introduces the main applications and features of the ZyXEL Device. It also
introduces the ways you can manage the ZyXEL Device.
1.1 Overview
The ZyXEL Device is an ADSL2+ pair bonding gateway that allows super-fast Internet access
over analog (POTS) telephone lines. It bonds two ADSL2+ lines into a single logical
connection to provide increased throughput at longer distances.
In the ZyXEL Device product name, “H” denotes an integrated 4-port switch (hub).
See Chapter 25 on page 147 for a full list of features.
Model names ending in “1”, for example P-663H-51, denote a device that works over the
analog telephone system, POTS (Plain Old Telephone Service).
The DSL RJ-11 (ADSL over POTS models) connects to your ADSL-enabled telephone lines.
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Only use firmware for your ZyXEL Device’s specific model. Refer to the label
on the bottom of your ZyXEL Device.
The ZyXEL Device is the ideal high-speed Internet access solution. It supports the ADSL
standards listed in
Table 61 on page 147 .
The ZyXEL Device provides protection from attacks by Internet hackers. By default, the
firewall blocks all incoming traffic from the WAN.
A typical Internet access application is shown below
Figure 1 Protected Internet Access Applications