Nitsuko 24i/28i/124i/384i Hardware Manual

1. Installing Cabinets
1-16
Connecting the Expansion Cabinet 5V Power
Cable (Figure 1-18)
Note:Remove the Main Cabinets AC power cord from the AC
receptacle.
1. Remove the back cover from the Main Cabinet.
2. Remove the back cover from the Expansion Cabinet.
3. Connect the red 9-conductor power cable to the top 9-pin
connector on the back of the Main Cabinet.
4. Connect the other end of the power cable to the lower 9-pin
connector on the back of the Expansion Cabinet.
Figurre 1-18  INSTALLING EXPANSION...

1. Installing Cabinets1-17
Installing a 90V Ring Generator (Figure 1-19)
When installing 8/16ASTU single line circuit PCBs to support the
installation of 2500-type analog devices, a 90 VAC ring generator
must be connected to the Main Cabinet.  The ring generator must
be mounted on the MDF within 4 feet of the Main Cabinet.
The ring generator cable (P/N 92111) is terminated with a 4-pin
molex connector on one end and has two unterminated leads
(RED/BLK) at the other end.
Note:When installing a ring...

1. Installing Cabinets
1-18
Installing a 90V Ring Generator (Cont’d)
4. Connect the cables Red lead to the +105V terminal of the
ring generator.
5. Install the ring generator cable to the CN5 connector on the
backplane of the Main Cabinet.  The pinch on the systems
ring generator cable connector faces the installers left.
6. Power up the ring generator.
7. Install PCBs to slots 6 and 7 of the Main Cabinet, if necessary.
Reinstalling the Top Cover (Figure 1-20)
1. Connect the top cover alarm cable.
2....

2. PCB Installation
and Startup2-1
Section 2, PCB INSTALLATION AND STARTUP
In this section . . .
Page
8ASTU/16ASTU Installation . . . . . . . . . . . . 2-11
8ATRU-LS1 Description. . . . . . . . . . . . . . . . 2-12
8ATRU-LS1 Installation . . . . . . . . . . . . . . . . 2-12
8GSAU Description . . . . . . . . . . . . . . . . . . . 2-13
8GSAU Installation . . . . . . . . . . . . . . . . . . . 2-13
4ATRU-LD1 Direct Inward Dial (DID)
PCB Description . . . . . . . . . . . . . . . . . . . . . 2-15
4ATRU-LD1...

Section 2, PCB INSTALLATION AND STARTUP (cont’d)2. PCB Installation
and Startup
2-2
In this section . . .
Page
PCB Startup  . . . . . . . . . . . . . . . . . . . . . . .2-20
Initial PCB Installation . . . . . . . . . . . . . . . . . 2-20
Initial Installation of Trunk PCBs . . . . . . . . . 2-21
Installing 4ATRU-EMI or 4ATRU-LD PCBs 2-21
Installing Filter Units  . . . . . . . . . . . . . . . .2-22
48FU Filter Unit Description . . . . . . . . . . . . 2-22
48FU Installation . . . . . . . . . . . . . . . . ....

2. PCB Installation
and Startup2-3
PCB LAYOUT
PCB Location (Figure 2-1)
Determine the slot position for each PCB.  In the Main Cabinet:

CPU slot - dedicated for the CPRU


Slot 1 - dedicated for a 16DSTU
The Main and Expansion Cabinets:


Slots 2-25 are universal (any type of PCB can be installed)
Use the table below to determine the PCB for each slot.
Order of Installing Extension PCBs
The order that 8ASTU/16ASTU and 16DSTU PCBs are
physically inserted determines the numbering plan.
For example, with a...

PCB LAYOUT
2. PCB Installation
and Startup
2-4
Order of Installing Trunk PCBs
The order that 8ATRU PCBs are physically inserted deter-
mines the line circuit numbering plan.
For example, if four 8ATRUs were installed in the Main
Cabinet in the following order, the numbering plan below
applies:
Order of Installing 4ATRU-EMI or 4ATRU-LD
PCBs
The order in which the 4ATRU-EMI or 4ATRU-LD1 PCBs
are installed determines the assigned line circuit number.
For example, if four 4ATRU-EMI or 4ATRU-LDs are...

2. PCB Installation
and Startup2-5
PCB LAYOUT
Figure 2-1  TYPICAL PCB LAYOUT9200 - 76 A
Station Block
B1CO Line Block
25-pair cable
25-pair cable
Main
cabinet CPRU
16 DSTU
CN3
16 DSTU
CN2
16 DSTU
CN1
4 PGDU
8 ATRU-LS1 (lines 1-8)
8 ATRU-LS1 (lines 9-16) CDTU-A CPRU
functionsTrunks
1-8
Stations
200-207Trunks
9-16
Stations
208-215
A1 24 FU-1 B4 B3 B2 B148 FU-148 FU-2typical filter cable
AC OUT
AC IN
AC OUT OFFONOUTPUT 

PCB INSTALLATION
2. PCB Installation
and Startup
2-6
Handling the PCBs
The PCBs are sensitive to static discharge. To minimize static
discharge, keep PCBs in static free bags when not installed.
Observe the following when installing or removing a PCB:

Ground Main Cabinet and Expansion Cabinets


Wear a grounded wrist strap to install/remove any PCBs


Do not touch PCB components.  Handle with white pulls.


All PCBs can be installed hot (except the CPRU)
Busying out Extension/Line PCBs
The run/block...

2. PCB Installation
and Startup2-7
PCB INSTALLATION
CPRU Description(Figure 2-2)
One CPRU PCB must be installed in the CPU slot in the Main
Cabinet.
The CPRU provides the following:

Eight diagnostic LEDs


Two DIP switches- one for data loading (RAM or disk)
- one not used


One relay for Night Mode Switch


One 10-pin connector (CN2) for CPRU to 48FU connection


One 3V lithium non-rechargeable battery - RAM backup


One 6-pin connector for terminal programming (future)


One MOH source S jumper...