Installing the DX-80
44 Comdial October, ‘03
2.5 KSU Wiring
The 408M/E, APM4, COM4, and DPM8 are equipped with RJ-11 modular jacks for each of the inter-
faced ports. This connection scheme allows for two methods of installation. The first method (tradi-
tional “MDF”) is recommended whenever possible to allow for maximum serviceability.
2.5.1 MDF
Whenever you extend the various ports of the DX-80 to the MDF, you must extend modular-ended
cables from the KSU module port to the MDF connection block. You have many choices when com
-
pleting these connections; it is left to the your discretion to use the most suitable industry-standard
wiring practice for the particular installation.
Many third-party vendor products are available to aid in this installation procedure. The following
examples are readily available at communications equipment / accessories supply houses. Although
this example denotes product of The Siemon Company®, you are urged to investigate the various
products available and make decisions for use based on your own assessment. Comdial is not respon
-
sible for the performance of any product provided by a third-party (outside) vendor.
The examples in the following chart are 25 pair (UTP), USOC, 24 AWG cables pre-fitted with modular
connectors on one end of the cable, and a male or female AMP® type connectors on the other end for
termination on a specially equipped, 66-block with mating AMP® type connector.
The Siemon Company® Hydra Cable Assemblies
Product
Number
Length
(feet)
Wiring Scheme -
End 1
HYD-F-24U1-03 3 25-Pair, Female
HYD-F-24U1-07 7 25-Pair, Female
HYD-F-24U1-10 10 25-Pair, Female
HYD-M-24U1-03 3 25-Pair, Male
HYD-M-24U1-07 7 25-Pair, Male
HYD-M-24U1-10 10 25-Pair, Male
WARNING
System power must be OFF before you plug in the station cable or
while servicing port connections at the punch-down block (66M1-50).
Although each port is over-current protected, unnecessary shorting should be avoided.
CAUTION
Use a quality crimping tool to fasten the modular connector to the
cable pair when using field-crimped modular connectors. Use of an
inferior crimping tool can lead to bad connections.
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