NEC Ds2000 Hardware Manual Instructions Manual

1. Installing the
Cabinet
1-9
Hanging the Cabinet(Figures 1-6 and 1-7)
1. Hang the Main Equipment Cabinet on the wall mount hang-
er as shown:

See Figure 1-6 when hanging a 4 slot cabinet.

See Figure 1-7 when hanging an 8 slot cabinet.
2. Using the remaining screws that were packed with the hang-
er, secure the cabinet to the plywood backboard.
Figure 1-6  HANGING THE 4 SLOT CABINET
80000 - 13
INSTALLING THE CABINET 

1-10
INSTALLING THE CABINETFigure 1-7  HANGING THE 8 SLOT CABINET
80000 - 60 

1. Installing the
Cabinet
1-11
GROUNDING THE CABINET
Removing the Right Side Panel (Figure 1-8)
Remove the cabinet right side panel to gain easy access to the
ground lugs and system cabling. The cabinet has two ground
connections: ETH (Earth Ground) and PBXG (PBX Ground).
1. Remove the two screws that secure the right side panel to
the cabinet.
2. Carefully slide the right side panel down until it swings clear
of the cabinet.
Figure 1-8  REMOVING THE SIDE PANELS
80000 - 16
4 Slot Cabinet
Shown 

1-12
GROUNDING THE CABINET
— For Your Notes — 

1. Installing the
Cabinet
1-13
GROUNDING THE CABINET
Attaching the Ground Wires (Figure 1-9)
The system provides two ground terminations. Each ground
connects from the system to the ground termination using 12
AWG stranded copper wire (see Figure 1-9).
Use the ETH (Earth Ground) for safety/system ground. You
mustconnect ETH to a known earth ground.

Use the PBXG (PBX Ground) if you have trunks that require
telco ground (such as ground start trunks). This ground is not
required for loop start trunks.
1....

1-14
RFI SUPPRESSOR ASSEMBLIES
Installing RFI Suppressor Assemblies (Figure 1-10)
You must install RFI Suppressor Assemblies as follows. The
suppressors mustbe mounted inside the cabinet and as close to
the appropriate PCB as possible.
For Station and Trunk Cables— Only install these assemblies if you are installing non-A
station and trunk PCBs in a 4 slot cabinet. If you have a
mixture of A and non-A PCBs, you only need to install
the assemblies on the non-A PCBs.
— RFI assemblies on station and trunk...

1. Installing the
Cabinet
1-15
RFI SUPPRESSOR ASSEMBLIES
80000 - 67
Figure 1-10  INSTALLING RFI SUPPRESSOR ASSEMBLIES For Station and Trunk Cables

Required only when using non-A
sta-
tion and trunk PCBs in 4 slot cabinets:
—16DSTU PCB P/N 80021
—8ASTU PCB P/N 80041
—4ASTU PCB P/N 80040
—4ATRU PCB P/N 80010
—8ATRU PCB P/N 80011

Not required for 8 slot cabinets. All 8
slot cabinets must use A
station and
trunk PCBs.For CPU Connections

Required on CPU mod jack and
RS-232 cables for all installations....

1-16
POWER SUPPLY INSTALLATION
Installing the Power Supply (Figures 1-11 and 1-12)
The power supply provides the
DC power sources required to
operate the system:
1. Slide the power supply into the
CN101 slot as shown at right.
2. Using a long-shaft phillips
head screwdriver, tighten the
two screws that secure the
power supply.
An 8 slot cabinet may require up
to 3 power supplies, using slots
CN101, CN102 and CN103.
Refer to System Configuration
on page 1-17 for more.
Figure 1-11  POWER SUPPLYFigure 1-12...

1. Installing the
Cabinet
1-17
SYSTEM CONFIGURATION - U SLOT
U Slot Configuration Guidelines
U Slot systems use software version 02.**.** or higher.
The total number of components you can install and connect
depends on power supply capacity and the System Load Factor.
Review the Configuration Guidelines at right and System Load
Factor Calculationson page 1-18 when configuring your sys-
tem. Also  read U Slot Default Settingson page 1-19. You may
find that the default setup is adequate for your needs....

1-18
System Load Factor Calculations
To check your system configuration:
1. In the table at right, indicate the quantity for each item
installed in the 
Qty
column.
2. For each item, multiply the 
Qty
times the Load Factor and
enter the value in the 
Total Load
column.
3. Add all the values in the 
Total Load
column and enter the
value in 
Item 1
.
4. Determine the System Load Factor capacity of the power
supplies installed in your system and enter the total in 
Item 2
.
A 4-slot cabinet can have only 1...