Technical information

Installation

DS1 Formatter Card Line Equalizer Switches

Set the line equalizer switches S1 and S2 as follows:

Note: The DS1 interface meets the AT&T DSX-1 specification for distances up to 655

feet (200 m) if 22 AWG (22 IWG) shielded cable is used. The interface can

operate at up to 750 feet (229 m), but compliance with the AT&T DSX-1 specifi-

cation is not guaranteed at this distance. For greater distances, a repeater must

be used.

CEPT Interface Assembly Jumpers

Jumper positions J06 to J09 allow you to ground the shields

of the coaxial cable connectors. Jumper positions J10 to J13

provide locations to affix the jumpers when they are not in

grounding positions. Jumpers J06, J07, J09, J011, and J12

are located beneath the side of the CEPT interface

assembly faceplate.

Note: Default settings are shown in bold.

Table 8: Line Equalizer Settings

Line Length Switch Cells

(feet) (meters)1234567

0 - 150 0 - 45.8 close open open open open open open

150 - 450 45.8 - 137.4 open close open open close open close

450 - 750 137.4 - 229 open open close close open close open

Table 9: CEPT Interface Assembly Connector Shield Grounding

Circuit 0

Circuit 1

RX grounded jumper across J06 RX grounded jumper across J08

RX not grounded no jumper across J06 RX not grounded no jumper across J08

TX grounded jumper across J07 TX grounded jumper across J09

TX not grounded no jumper across J07 TX not grounded no jumper across J09