ZyXEL Communications Prestige 642 Betriebsanweisung PDF herunterladen (Seite 22)

Prestige 642 ADSL Internet Access Router

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What is xDSL

Drawing 2

It is the sharing of the telephone and ADSL signals on the same in-house wiring that seemed to be the

greatest potential for difficulty with G.Lite. Noise generated from a telephone in the same frequency range

as the ADSL signal can be disruptive to the ADSL signal. In addition the impedance of a telephone when

off-hook may be so low that it essentially shunts the strength of the ADSL signal. When a POTS splitter is

installed at the entry point where the line comes into the home, it will filter the telephone signals before

combining the ADSL and telephone signals transmitted and received. The issues of noise and impedance

are eliminated with a single POTS splitter installation. A solution for G.Lite is to install an in-line

microfilter (low-pass filter) between the wall jack and the telephone, thus eliminating the disturbance

problem.

By reducing the complexity of on-site installation and minimizing the need for new wiring at the user's

home, the G.Lite version of ADSL will make it possible to increase bandwidth for the customer on a more

cost-effective basis. The G.Lite version of ADSL is still 8 to 10 times faster than the ISDN services offered

for Internet access, capable of providing 1.536 Mbps downstream and 512 Kbps upstream. Moreover plug-

and-play ability opens the door to putting G.Lite modems into computers at the retail level and selling the

modems in standard outlets.

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ZyXEL Communications Prestige 642 Betriebsanweisung Seite 22