VIEWSONIC EXES-2000 - Manual (Page 10)

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.
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
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.
When utilizing multi-core cables already in use for
wiring, confirm they are twisted paired cables. Unless
they are twisted cables, they may not be used due to
interference between lines.
5. Cable installation
5-1 Cable selection
Core diameter
0.5 mm
0.65mm
0.9 mm
Service distance
1.0km (1.5km)
1.5km (2.5km)
2.5km (3.5km)
Not allowed
Exchange
Not allowed
Station
5-3 Wiring examples
Multi-pair cable
Exchange
Indoor
terminal
board Stations
2-conductor interphone cables
Stations
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