5. Cable installation

5-1 Cable selection

Use 2-conductor telephone or interphone cables for connection from the exchange to the station.

Be sure to use a multi-pair twisted cable such as an indoor cable and CCP-(A)P cable when the connection is

made via the external terminal board.

Select appropriate cables according to the following table that shows the relationship between cable diameter and transmission distance.

Core diameter

Service distance

0.5 mm

1.0km

(1.5km)

0.65mm

1.5km

(2.5km)

0.9 mm

2.5km

(3.5km)

Note

The figure in a parenthesis is the maximum cable length and shown at its left is the normal service distance. The

system supplied from the factory is pre-wired for the

normal service distance. To obtain the maximum cable length, replace the corresponding resistor R31, R39,

R51 or R59 (390k ohms) on the LM unit corresponding to

the line with that of 680k ohms. (See paragraph 6-10.)

5-2 Points to remember

The multi-pair cable used for wiring of the EXES-2000

 

system must not be jointly used as a power cable or

Not allowed

data transmitting cable for facsimile, etc.

 

Do not connect an unused cable to the exchange.

 

Do not connect an unused cable to a connection

 

cable between the exchange and the station.

Exchange

When utilizing multi-core cables already in use for

Station

wiring, confirm they are twisted paired cables. Unless

Not allowed

they are twisted cables, they may not be used due to

 

interference between lines.

 

5-3 Wiring examples

Multi-pair cable

Indoor

ExchangeterminalStations board

2-conductor interphone cables

Stations

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Image 10
ViewSonic EXES-2000 manual Cable installation, R51 or R59 390k ohms on the LM unit corresponding to, Exchange