Comdial Dxp Plus Instructions Manual

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 DID Line Board IMI89–191
Installing The DID Line Board – 5 

2.2 Installing DID Line Boards
1. Normally you should first disconnect the optional battery back-up assembly from the main cabinet power
supply and then disconnect the AC power cord from the AC outlet; however, when necessary, you can install
a DID 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 6, you will connect the other end of this coil
cord to the precharge jack on the line...

Installing The DID Line Board
Static Discharge Wrist StrapPower Supply
Pre-charge Port
DID Line Board Pre-charge
Port Pre-charge
Cable For
DID Board
Installation
During
Power Up
PLUS021
Installing The DID Line Board IMI89–191
Installing The DID Line Board – 7 

3.0 Connecting The DID Lines
The FCC specified jack configuration for DID line connection to the switched network is a universal service order
code (USOC) RJ21X type and the facility interface code for DID is02RV2-T. This specified connection is
typically a type 66M-nn connector block.
CAUTION
When connecting the lines for DID applications, be sure that you do not reverse the tip and ring leads.
A 50-pin connector on the DID line board provides its line terminations. You can cable connect the DID board...

Viewing Typical DID Line Connections
NOTE: Wiring for the 8 line board is shown. Wiring for the 4 line board uses only pairs 1 through 4.
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2
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50
CLIP TERMINALS
50
26
1 25
{{ { {
{{ { {
Connector Block
Typical Earth GroundNo. 6 Solid
Copper WireGrounding
Terminal
Ferrite
Collar Male 50-pin
ConnectorDID
Line Board Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8...

3.1 Understanding The DXP Plus Logical Numbering
Because there are no dedicated station or line ports in the DXPPlus, 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...

3.2 Understanding The DID Line Connections
25-Pair Connections Wire-Pair
ConnectionsLine Designations
Wire Color Pair Pin
No.Clip
Term.Wire Name Line Number CO Line
Number
White-Blue 1 26 1 Tip
1
Blue-White 1 2 Ring
White-Orange 2 27 3 Tip
2
Orange-White 2 4 Ring
White-Green 3 28 5 Tip
3
Green-White 3 6 Ring
White-Brown 4 29 7 Tip
4
Brown-White 4 8 Ring
White-Slate 5 30 9 Tip
5
Slate-White 5 10 Ring
Red-Blue 6 31 11 Tip
6
Blue-Red 6 12 Ring
Red-Orange 7 32 13 Tip
7
Orange-Red 7 14 Ring
Red-Green 8 33 15...

4.0 Understanding The Federal Communications
Requirements Concerning DID Lines
The Federal Communications Commission (FCC) requires that you inform the central office (CO) that the DXP
Plusis configured as an MF (multipurpose) registered device if you connect it to ground start DID lines. Also,
FCC rules, part 68, require customer premise equipment (CPE) to return answer supervision signalling to the CO
for DID calls. Allowing the DXPPlusto be operated in a manner that does not provide answer supervision...

Party Lines And Coin Lines
Local telephone company regulations may not permit connections to party lines and coin lines by anyone except
the telephone operating company.
Troubleshooting
If a service problem occurs, first try to determine if the trouble is in the on-site system or in the telephone
company equipment.  Disconnect all equipment not owned by the telephone company.
If this corrects the problem, the faulty equipment must not be reconnected to the telephone line until the problem
has been...

Installing The Multipurpose Line Board
In The DXP Plus Digital Communications System
1.0 Understanding The Multipurpose Line Board
The Multipurpose line board for the DXP Plus digital communications system provides system interface for
ground start lines, loop start lines, and E&M (tie) lines.  These are typically the three different line types that the
central office (CO) makes available for connection to the public switched network. The multipurpose line board is
fully programmable for each type of...