Specifications

3.9

Connecting The

Stations

1 Station connections, like line connections, are typically through

66M-xx

connector blocks. The station boards, like many of the line

~ boards, are also connected through

25pair

male

amphenol

connectors.

While the station boards have protection against shorts, it’s better to

~ punch down the wiring with the power off.

Both IST devices and digital stations are two-wire connections, but

you should skip space on the IST block to avoid crosstalk. With digital

signals, crosstalk isn’t a problem. The polarity on the wires isn’t

important for either the digital or IST stations.

If your station cables must cross over fluorescent lights, the cables

should cross the lights at a

go-degree

angle to diminish the effect of

the magnetic field that builds up around the lights. You should also

make sure that the wires are elevated at least two feet above the light.

If the telephone wire runs near a light that is fluttering, you may

encounter some interference, so make sure any such light is replaced

before you continue.

Station Wiring

Use the same approach to station connections as you did with your

lines; connect each station board to a 66-block, again using both sides

of the block. Then cross connect that 66-block to another 66-block

that will be connected to the house wiring. This dual connection

makes moving any of your stations much easier since you don’t have

to change any of the wiring to the station boards or to the house

wiring. If you are running any station wire outside the building, be

sure to provide extra surge protection on the station cables.

The maximum total distance allowed from the common equipment to

the stations is 1500 feet for multiline telephones, using # 24 gauge

twisted pair cable, and 3000 feet for industry standard telephones

using

24 gauge, twisted pair cable (see section 1.8 of this manual for

more cabling information). If you have any spare conductors on the

cables between the 66-blocks and the station jacks, it is a good

practice to connect them to earth ground to help prevent them from

inducing radio frequency and

or AC interference into the system.

lnstaiiing The DXP 3