ZyXEL Communications Prestige 642 Betriebsanweisung PDF herunterladen (Seite 21)

Prestige 642 ADSL Internet Access Router

xxi

What is xDSL ?

The G.Lite version of ADSL is a subset of ADSL service. Its key goal was to develop a technology that

could be easily installed by end users. G.Lite allows telcos to provision DSL and customers to set up

G.LITE DSL connections on their own - without the delay and expense of a telco service visit. A telephone

technician wouldn’t have to install a POTS splitter as a necessary piece of customer premises equipment.

With this version of service, the G.Lite modem and the POTS operate together on the same internal home

wiring system, allowing the customer to plug both a telephone and a computer modem into a standard wall

telephone outlet.

This contrasts with the original concept where ADSL service is provided over separate home wiring fed

from a centralized POTS splitter, located on the telephone line where it enters the home, usually in a NID

(network interface device) – see the following drawing. This would also require a new wire from the NID to

the ADSL modem.

Drawing 1

For G.Lite, the telephone and ADSL service are carried on a common in-house wire to the computer – see

the following drawing.

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