User`s guide

INSTALLATION
Page 20 User’s guide ref 9018809-01 XSRING+ SHDSL switch
11 Line cable
Twisted pair
The XSRING+ shdsl switch is designed to be connected to one or several telephone grade twisted
pairs.
The conductor diameter must be included between 0.4 mm and 1 mm.
Shielded cable
It is better to use a shielded cable.
The shield must be connected to the earth at one of its ends.
The shield decreases the influence of the electromagnetic ambient noise on the shdsl signal.
Moreover, the shield protects the XSRING+ shdsl switch against lightning.
Electrical power cable
Two power conductors can be used instead of a twisted pair to set an shdsl connection.
However, because the two wires are not twisted, the ambient electrical noise may disturb the
transmission.
Compared to the transmission over a twisted pair, the maximum distance between two SHDSL
switches is decreased.
Cross talk
If the cable is made of several pairs, each pair can be used to transmit a particular shdsl connection ;
however the shdsl signal transmitted in one pair may disturb the shdsl signal transmitted in another
one, and, in some cases, may decrease the effective data rate of both shdsl connections.