Comdial Dxp Plus Instructions Manual

9.0 Understanding FCC Rules And Regulations
This DXP Plus digital communications system complies with Federal Communications Commission (FCC)
Rules, Part 68. The FCC registration label on the equipment cabinet contains the FCC registration number, the
ringer equivalence number, the model number, and the serial number or production date of the system.
Notification To Telephone Company
Unless a telephone operating company provides and installs the system, the telephone operating company which
provides the...

Radio Frequency Interference
The DXP Plus system contains incidental radio frequency generating circuitry and, if not installed and used
properly, may cause interference to radio and television reception. This equipment has been tested and found to
comply with the limits for a Class A computing device pursuant to Subpart J of Part 15 of FCC Rules. These
limits are designed to provide reasonable protection against such interference when operated in a commercial
environment. Operation of this equipment in...

Installing The DXP Plus
Expansion Common Equipment Cabinet
1.0 Installing The Expansion Common Equipment Cabinet
1.1 Considering The Mounting Parameters
Mount the first expansion cabinet above the main common equipment cabinet and mount the second expansion
cabinet below the main common equipment cabinet.
Insure that the expansion cabinet is within four feet of it own dedicated 117VAC, 15 AMP electrical outlet. (The
expansion cabinet requires its own dedicated 117VAC 15 AMP circuit, with a third-wire...

1.4 Mounting The Expansion Common Equipment Cabinet
1. Unpack and carefully inspect all equipment for shipping damage.  Notify the shipper immediately of any
damages found. Verify that the packages contain all parts and accessories needed for proper installation and
operation.
2. Expansion cabinet one mounts above the main cabinet and expansion cabinet two mounts below the main
cabinet. After you determine where you will mount the expansion cabinet, remove the plates covering the
appropriate interface...

Mounting The Common Equipment Cabinet
22 5/16
Expansion
Cabinet 1
Panel
Retaining
Screws
Panel
Retaining
Screws
Panel
Retaining
Screws Typical Backboard
48 X 96 3/4 Plywood Sheet
Main
Cabinet
Expansion
Cabinet 2 12 3/4
10 1/2
10 1/2
10 1/2
10 1/2
10 1/2
10 1/24 3/4
4 3/4 48
PLUS024
Installing The DXP Plus Expansion Cabinet IMI66–106
Installing The DXP Plus Expansion Cabinet – 3 

1.5 Understanding System Grounding Requirements
Transient voltage spikes, if induced onto CO or CENTREX lines, can travel through the cable and into the
common equipment. The telephone company offers basic protection against this condition but it is usually
designed to protect the central office circuits. While it will also provide some protection to the common
equipment, you should not rely upon it for total protection. To help ensure that external over-voltage surges do not
damage the system, you...

Grounding The Expansion Cabinets
Typical Earth
Ground No. 10 or 12 Solid Copper Wire
(Cabinet-to-Cabinet)
No. 10 or 12 Solid Copper Wire
(Cabinet-to-Cabinet) Grounding Terminal
Grounding TerminalTwo Grounding Terminals
No. 6 Solid Copper Wire
(Cabinet-to-Earth Ground)
PLUS039
Installing The DXP Plus Expansion Cabinet IMI66–106
Installing The DXP Plus Expansion Cabinet – 5 

2.0 Installing The Power Supply
NOTE: The common equipment cabinet employs an electronic switching power supply. During operation, power
supplies of this type generate an audible sound from their switching regulators. This sound is normal and
is not an indication that the power supply is operating improperly.
Install the power supply assembly in the expansion cabinet per the following discussion and illustration.
1. Be sure to ground the common equipment cabinet per the instructions in the previous...

PLUS075
Typical Common Equipment Cabinet
Power
Supply
Assembly
Machine Screw
(4 Places)
Installing The Power Supply Assembly
Installing The DXP Plus Expansion Cabinet IMI66–106
Installing The DXP Plus Expansion Cabinet – 7 

2.1 Making The AC Power Connection
·For the expansion cabinet’s AC power connection, employ a dedicated 117VAC 15 AMP circuit, with a
third-wire ground, supplied to a standard electrical outlet (NEMA 5-15R) for the AC power connection.
Remember, this electrical outlet must be located within four feet of the common equipment expansion cabinet.
Remember also, this dedicated electrical outlet is in addition to the one that you provide for the main cabinet’s
AC power needs.
CAUTION
This dedicated AC circuit...