Comdial Dxp Plus Instructions Manual

3.0 Connecting The Stations
Connections between the telephone stations and the common equipment station boards are typically via type
66M-xx connector blocks that are cable connected to 50-pin male connectors on the station boards.
The maximum distance allowed from the common equipment to the industry-standard telephone varies with the
gauge of wire that you use to make the connection. Refer to the following chart for complete details.
Station Type Wire Gauge
20 AWG 22 AWG 24 AWG
Industry-Standard...

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CLIP TERMINALS
50
26
1 25
Typical Station
Connector Block
Ferrite
Collar Female 50-pin
Cable Connector
J1 (Male 50-pin
Connector) Typical Industry-Stand
a
Station Board
J2 (Male 50-pin
Connector)
PLUS027
Connecting Telephones To The IST Station Board
Installing The IST Station Board IMI89–184
Installing The IST Station Board – 9 

3.2 Detailing The Station Connections For J1
25-Pair Connections Two-Wire Connections Station Connections
Wire Color Pair Pin
No.Clip
Term.Pair Wire Color Station Location
White-Blue 1 26 1 Tip Lead Green1Blue-White 1 2 Ring Lead Red
White-Orange 2 27 3
No connectionOrange-White 2 4
White-Green 3 28 5
Green-White 3 6
White-Brown 4 29 7 Tip Lead Green
2Brown-White 4 8 Ring Lead Red
White-Slate 5 30 9
No connectionSlate-White 5 10
Red-Blue 6 31 11
Blue-Red 6 12
Red-Orange 7 32 13 Tip Lead Green
3Orange-Red...

3.3 Detailing The Station Connections For J2
25-Pair Connections Two-Wire Connections Station Connections
Wire Color Pair Pin
No.Clip
Term.Pair Wire Color Station Location
White-Blue 1 26 1 Tip Lead Green9Blue-White 1 2 Ring Lead Red
White-Orange 2 27 3
No connectionOrange-White 2 4
White-Green 3 28 5
Green-White 3 6
White-Brown 4 29 7 Tip Lead Green
10Brown-White 4 8 Ring Lead Red
White-Slate 5 30 9
No connectionSlate-White 5 10
Red-Blue 6 31 11
Blue-Red 6 12
Red-Orange 7 32 13 Tip Lead Green...

3.4 Understanding The DXP Plus Logical Numbering
Because there are no dedicated station or line ports in the DXP Plus, the system uses an automatic
configuration method to logically number its stations and lines. Automatic configuration occurs after you
perform a master clear on the system.
How automatic configuration works
With automatic configuration, the system does a search for all installed station and line boards in the main and
expansion cabinets, and assigns a logical number for each provided...

4.0 Checking Out The Installation And Isolating Failures
Check the telephone installation for proper operation by performing the following voltage measurements.
4.1 Voltage Check
Make the following voltage measurements at the station connector blocks under the following conditions:
·Common equipment connected to station connector blocks.
·Stations wired and wiring punched down on blocks.
·Bridging clips installed
·AC power connected to the common equipment
Measure the DC voltage across the Tip and Ring...

Installing The Loop Start Line Board
In The DXP Plus Digital Communications System
1.0 Introducing The Loop Start Line Board
1.1 Defining Loop Start
The line board signals for the host system to complete a line connection by sending a supervisory signal to the
host system. Typically this signal is the hookflash that occurs when a user takes a telephone off hook on the line.
The line board transmits this signal to the host system by placing a resistance across the line’s tip and ring leads to
complete a...

2.0 Installing Circuit Boards In The Equipment Cabinet
CAUTION
Circuit boards are susceptible to damage caused by electrostatic discharge, and you must keep this fact in
mind as you handle the circuit boards. Refer to the Comdial publication IMI01-005,Handling Of
Electrostatically Sensitive Components, for general information. Specific handling precautions are also
included in this installation instruction.
2.1 Creating A Static Safe Work Area
When servicing the common equipment cabinet at the...

Typical Earth
Ground
Static
Wrist
Strap
ESD Protective
Mat ESD Protective
Mat
ESD Protective
Worksurface
Static 2
Common Point Ground
Creating A Static Safe Work Area
Expansion
Cabinet
Expansion
Cabinet
Earth
Ground 1 Meg Ohm
Resister Conductive
MatStatic Discharge
Wrist Stap Common
Equipment
Cabinet
PLUS035
Providing Static Protection At The Cabinet Mounting Location
Installing The Loop Start Line Board IMI89–172
Installing The Loop Start Line Board – 3 

2.2 Installing Loop Start Line Boards
1. Normally you should disconnect the AC power cord from the AC outlet and disconnect the optional battery
back-up assembly from the main cabinet power supply; however, when necessary, you can install a line board
in an operating system. If you must do this, connect one end of a standard telephone handset coil cord to the
precharge port on the power supply. During step 5, you will connect the other end of this coil cord to the
precharge jack on the line board.
2....