80000INS07
April 2001 (2106)
Hardware Manual
2. PCB Installation 3. Installing
Extensions and Trunks
4. Optional
Equipment
5. Maintenance
Options and SMDR
6. Specifications
and Parts
1. Installing the
Cabinet
Printed in U.S.A.
This manual has been developed by NEC America, Inc. It is intended for the use of its customers and service
personnel, and should be read in its entirety before attempting to install or program the system. Any comments or suggestions for improving this manual would be appreciated. Forward your remarks to:
NEC America, Inc., Corporate Networks Group
4 Forest Parkway
Shelton, CT 06484
cng.nec.com
Nothing contained in this manual shall be deemed to be, and this manual does not constitute, a warranty of,
or representation with respect to, any of the equipment covered. This manual is subject to change without
notice and NEC America, Inc. has no obligation to provide any updates or corrections to this manual.
Further, NEC America, Inc. also reserves the right, without prior notice, to make changes in equipment
design or components as it deems appropriate. No representation is made that this manual is complete or
accurate in all respects and NEC America, Inc. shall not be liable for any errors or omissions. In no event
shall NEC America, Inc. be liable for any incidental or consequential damages in connection with the use of
this manual. This document contains proprietary information that is protected by copyright. All rights are
reserved. No part of this document may be photocopied or reproduced without prior written consent of NEC
America, Inc.
©2001 by NEC America, Inc.. All Rights Reserved.
Printed in U.S.A.
1. Installing the
Cabinet
1-1
In this section . . . Page
RFI SuppressorAssemblies . . . . . . . . . . .1-14
Installing the RFI Suppressor Assemblies. . . 1-14
Power Supply Installation . . . . . . . . . . . .1-16
Installing the Power Supply . . . . . . . . . . . . . 1-16
System Configuration - U Slot . . . . . . . . .1-17
U Slot Configuration Guidelines. . . . . . . . . . 1-17
System Load Factor Calculations . . . . . . . . . 1-18
U Slot Default Settings. . . . . . . . . . . . . . . . . 1-19
System Configuration - Fixed Slot . . . . . .1-20
Fixed Slot Configuration Guidelines. . . . . . . 1-20
Fixed Slot Default Settings. . . . . . . . . . . . . . 1-20
In this section . . . Page
Installing the Cabinet . . . . . . . . . . . . . . . . .1-3
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Before Installing. . . . . . . . . . . . . . . . . . . . . . . 1-3
Site Requirements. . . . . . . . . . . . . . . . . . . . . . 1-3
Planning the Installation for a 4 Slot Main
Equipment Cabinet . . . . . . . . . . . . . . . . . . . 1-4
Planning the Installation for an 8 Slot Main
Equipment Cabinet . . . . . . . . . . . . . . . . . . . 1-5
Removing the Cover . . . . . . . . . . . . . . . . . . . . 1-7
Unpacking the Wall Mount Bracket . . . . . . . . 1-8
Mounting the Wall Mount Bracket . . . . . . . . . 1-8
Hanging the Cabinet. . . . . . . . . . . . . . . . . . . . 1-9
Grounding the Cabinet . . . . . . . . . . . . . . .1-11
Removing the Right Side Panel. . . . . . . . . . . 1-11
Attaching the Ground Wires . . . . . . . . . . . . . 1-13
Section 1, INSTALLING THE CABINET
1-2
— For Your Notes —
1. Installing the
Cabinet
1-3
Unpacking
Unpack the equipment and check it against your equipment lists.
Inspect for physical damage. If you are not sure about a component’s function, review the Product Description Manual. Contact
your Sales Representative if you have additional questions.
Have the appropriate tools for the job on hand, including: a test
set, a punch down tool and a digital voltmeter.
Before Installing
Make sure you have a building plan showing the location of
the common equipment, extensions, the telco demarcation and
earth ground. In addition, the installation site must meet the
requirements outlined in the Standard Practices Manual.
Site Requirements
The common equipment is contained in the wall-mounted Main
Equipment Cabinet. Choose a central location for the cabinet
that allows enough space for the equipment — and provides
enough room for you to comfortably work. The Installation
Layout (Figures 1-1 and 1-2) shows you about how much space
your system requires.
INSTALLING THE CABINET
1-4
Planning the Installation for a 4 Slot Main
Equipment Cabinet (Figure 1-1)
Before installing the common equipment, you should mount a
Main Distribution Frame (MDF) plywood backboard in a centrally located spot. A1/2 sheet of plywood (4’ x 4’) should be
more than adequate. Mount this backboard using suitable fasteners, taking care to adhere to standard installation practices
and local codes.
The equipment cabinet requires a three-prong, dedicated 110
VAC 60 Hz circuit (NEMA 5-15 receptacle) located within 7
feet of the AC receptacle.
Normally, you install the extension and trunk blocks to the right
of the Main Cabinet. Telco should also install the RJ21X to the
right of the Main Cabinet.
Figure 1-1 4 SLOT INSTALLATION LAYOUT
80000 - 15A
Plywood backboard
Dedicated
AC Outlet
Surge
Protector
To earth
ground
To telco
ground
Station
Blocks
Station
Blocks
Trunk
Blocks
4’
4’
INSTALLING THE CABINET
1. Installing the
Cabinet
1-5
Planning the Installation for an 8 Slot Main
Equipment Cabinet (Figure 1-2)
Before installing the common equipment, you should mount a
Main Distribution Frame (MDF) plywood backboard in a centrally located spot. Afull sheet of plywood (8’ x 4’) should be
more than adequate. Mount this backboard using suitable fasteners, taking care to adhere to standard installation practices
and local codes.
The equipment cabinet requires a three-prong, dedicated 110
VAC 60 Hz circuit (NEMA 5-15 receptacle) located within 7
feet of the AC receptacle.
Normally, you install the extension and trunk blocks to the right
of the Main Cabinet. Telco should also install the RJ21X to the
right of the Main Cabinet.
INSTALLING THE CABINET
1-6
INSTALLING THE CABINET
Figure 1-2 8 SLOT INSTALLATION LAYOUT
80000 - 61
8’ X 4’ Plywood backboard
Surge
Protector
To earth
ground
To telco
ground
Station
Blocks
Trunk
Blocks
Station
Blocks
Dedicated
AC Outlet
1. Installing the
Cabinet
1-7
Removing the Cover (Figure 1-3)
Before wall-mounting, remove the cover on the Main Equipment
Cabinet.
1. Unscrew the two captive screws on the front of the cabinet
cover.
2. Lift up slightly on the front of the cover — then gently slide
the cover back to remove it.
Figure 1-3 REMOVING THE COVER
INSTALLING THE CABINET
4 Slot Cabinet Shown
80000 - 12
1-8
Unpacking the Wall Mount Bracket (Figure 1-4)
The wall mount bracket and screws are taped to the packing material in the Main Equipment Cabinet box. Unpack the wall mount
bracket and mounting screws.
Figure 1-4 WALL MOUNT BRACKET
Mounting the Wall Mount Bracket (Figure 1-5)
Mount the wall mount bracket on the MDF in a convenient location, about 12” higher than where you want the bottom of the cabinet to line up.
Figure 1-5 MOUNTING THE WALL MOUNT BRACKET
80000 - 14
80000 - 11
INSTALLING THE CABINET
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 hanger 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 hanger, secure the cabinet to the plywood backboard.
Figure 1-6 HANGING THE 4 SLOT CABINET
80000 - 13
INSTALLING THE CABINET
1-10
INSTALLING THE CABINET
Figure 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
4 Slot Cabinet
Shown
80000 - 16
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
must connect 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. Remove the lug on the ground connection you want to connect.
2. Follow Figure 1-10 and run the ground wire(s) through the
RFI Suppressor Assembly as shown.
3. For Ear
th Ground:
Run a ground wire from the ETH lug to a known earth ground.
For PBX Gr
ound:
Run a ground wire from the PBXG lug to the telco ground.
4. Crimp ring terminals as required to the ground wires.
5. Reinstall and firmly tighten the lug(s) removed in step 1 above.
Do not plug in the power cord or reinstall the right side
panel until all PCB installation and cabling are complete.
Figure 1-9 ATTACHING THE GROUND WIRES
4 Slot Cabinet
Shown
80000 - 17
To earth ground
To telco ground
1-14
RFI SUPPRESSOR ASSEMBLIES
Installing RFI Suppressor Assemblies (Figure 1-10)
You must install RFI Suppressor Assemblies as follows. The
suppressors must be 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 Aand non-A PCBs, you only need to install
the assemblies on the non-A PCBs.
— RFI assemblies on station and trunk cables are not
required with 8 slot cabinets, since these cabinets use only
A PCBs.
● For Ground Wires
— You must install a separate RFI assembly for the ground
wire(s) in all systems.
— If your system has 2 ground wires, install them both in
the same assembly.
● For CPU Connections
— You must install a separate RFI assembly for the CPU
mod jack and RS-232 cables in all systems. Install both
cables in the same assembly.
he
RS-
f-
onal
able.
s
g.,
nly
0021.
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.
For Ground Wire(s)
● Required 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 SUPPLY
Figure 1-12 Installing the Power Supply
4 Slot Cabinet
Shown
80000 - 29
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 Calculations on page 1-18 when configuring your system. Also read U Slot Default Settings on page 1-19. You may
find that the default setup is adequate for your needs.
Also see Where to Install the PCBs in your U Slot System on
page 2-2.
Notes for U Slot Software
● U Slot (02.nn.nn) software is available with both 4 and 8 slot cabinets.
4 Slot Cabinets
● Do not install more than 2 16DSTU PCBs installed under any circumstances.
● The rst 16DSTU PCB you install must be in the rst slot.
● You can install up to 40 extensions maximum, as follows:
(2) 16DSTU PCBs = 32 digital extensions
(1) 8ASTU PCB = 8 analog extensions
Total = 40 extensions
● You can install up to 24 trunks maximum, as follows:
(3) 8ASTU PCBs = 24 analog trunks
● Maximum con guration is 48 ports.
● The total of all extensions and trunks cannot exceed 48.
● Always use the System Load Factor Table to check you system con guration.
8 Slot Cabinets
● Do not install more than 2 16DSTU PCBs for each power supply.
● The rst 16DSTU PCB you install must be in the rst slot (CN1).
● You can install up to 96 extensions maximum.
● You can install up to 48 trunks maximum.
● The total of all extensions and trunks installed cannot exceed 104.
● Maximum con guration is 104 ports.
● 8-slot cabinet require, A series PCBs, as follows:
CPU PCB P/N 80025A
Power Supply P/N 80005A
16DSTU Digital Station PCB P/N 80021A
8 ASTU 8 Port Analog Station PCB P/N 80041A
4ASTU 4 Port Analog Station PCB P/N 80040A
8ATRU 8 Port Analog Trunk PCB P/N 80011A
4ATRU 4 Port Analog Trunk PCB P/N 80010A
● Always use the System Load Factor Table to check your system con guration.
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 power supply. An 8slot cabinet can have up to 3 power supplies. You cannot have more than two 16DSTU PCBs per power supply, regardless of System Load Factor calculations.
Exceeding the System Load Factor will cause the system’s power supplies to automatically shut down.
5. Compare the entry in Item 2 to your entry in Item 1. Item 1
must always be equal to or less than the entry in Item 2.
Do not operate your system if the System Load Factor
total (Item 1) exceeds the allowable value (Item 2).
SYSTEM CONFIGURATION - U SLOT
System Load Factor Calculations
Description Load Factor Qty Total Load
16DSTU PCB 16
4ASTU PCB 8
8ASTU PCB 12
110-Button DSS Console 2
24-Button DSS Console 1
Total DSS Consoles installed cannot exceed 4.
2-OPX Module 3
Item 1: Total load for this con guration:
Item 2: If you have one power supply installed, enter 48.
If you have two power supplies installed, enter 80.
If you have three power supplies installed, enter 112.
(2 16DSTU PCBs maximum per power supply)
Note: An 8-Slot Cabinet can have up to 3 power supplies. You cannot have more than
two 16DSTU PCBs per power supply, regardless of System Load Factor calculations.
1. Installing the
Cabinet
1-19
SYSTEM CONFIGURATION - U SLOT
U Slot Default Settings
If you have a U Slot system (software version 02.**.**), following are the default configurations. If you have a fixed slot
system (software 01.**.**), turn to page 1-20.
● 4 Slot Cabinet with CPU P/N 80025
Default configuration: 16 trunks x 32 extensions
Slot CN1 = 16 DSTU PCB (Extensions 300-315)
Slot CN2 = 16 DSTU PCB (Extensions 316-331)
Slot CN3 = 8 ATRU PCB (Trunks 1-8)
Slot CN4 = 8 ATRU PCB (Trunks 9-16)
● 4 Slot Cabinet with CPU P/N 80025A
Default configuration: 0 trunks x 64 extensions
Slot CN1 = 16 DSTU PCB (Extensions 300-315)
Slot CN2 = 16 DSTU PCB (Extensions 316-331)
Slot CN3 = 16 DSTU PCB (Extensions 332-347)
Slot CN4 = 16 DSTU PCB (Extensions 348-363)
Notes on this configuration:
1. Slots CN5-CN8 are not available.
2. You cannot install this configuration as is; it has too many
16DSTU PCBs. You must use 9902: Slot Control to reconfigure your PCBs. See your system’s Release Notes or
Software Manual for more on using 9902: Slot Control.
● 8 Slot Cabinet with CPU P/N 80025A
Default configuration: 24 trunks x 80 extensions
Slot CN1 = 16 DSTU PCB (Extensions 300-315)
Slot CN2 = 16 DSTU PCB (Extensions 316-331)
Slot CN3 = 16 DSTU PCB (Extensions 332-347)
Slot CN4 = 16 DSTU PCB (Extensions 348-363)
Slot CN5 = 16 DSTU PCB (Extensions 364-379)
Slot CN6 = 8 ATRU PCB (Trunks 1-8)
Slot CN7 = 8 ATRU PCB (Trunks 9-16)
Slot CN8 = 8 ATRU PCB (Trunks 17-24)
Notes on this configuration:
1. This configuration requires 3 power supplies.
2. 8 Slot cabinets require A version PCBs.
1-20
SYSTEM CONFIGURATION - FIXED SLOT
Fixed Slot Configuration Guidelines
Fixed Slot systems use software version 01.**.**. The maximum configuration of your fixed slot system is 16 trunks and
32 extensions. Also see Where to Install the PCBs in your Fixed
Slot System on page 2-5.
Load factor in your fixed slot system is an issue only if you
have DSS Consoles and 2-OPX Modules installed (see the
System Load Factor Calculations chart on page 1-18).
Exceeding the load factor will cause your system’s
power supply to automatically shut down.
Fixed Slot Default Settings
If you have a Fixed Slot system (software version 01.**.**),
following is the default configuration. If you have a U Slot system (software 02.**.**), turn to page 1-17.
● 4 Slot Cabinet with Fixed Slot Software and
CPU P/N 80025
Default configuration: 16 trunks x 32 extensions
Slot CN1 = 16 DSTU PCB (Extensions 300-315)
Slot CN2 = 16 DSTU PCB (Extensions 316-331)
Slot CN3 = 8 ATRU PCB (Trunks 1-8)
Slot CN4 = 8 ATRU PCB (Trunks 9-16)
Notes on this configuration:
1. You can plug DSTU PCBs only into slots CN1 and CN2.
1. You can only plug an ASTU PCB only into slot CN2 (in
place of the second DSTU PCB).
2. Install ATRU PCBs only into slots CN3 and CN4.
Notes for Fixed Slot Software
● Fixed slot (01.nn.nn) software is only compatible with 4 slot cabinets.
● Fixed slot software is no longer available, but you may encounter it in existing installations.
● You can plug 16DSTU PCBs only into slots CN1 and CN2. Do not install more than 2
16DSTU PCBs under any circumstances.
● You can plug an ASTU PCB only into slot CN2 (in place of the second DSTU PCB).
● Install ATRU PCBs only into slots CN3 and CN4.
● System Load Factor in Fixed Slot systems is only an issue if you have DSS Consoles and 2-
OPX Modules installed. Note that you cannot install more than 4 DSS Consoles, regardless
of System Load Factor.
● The Release Notes that came with your system indicate if it uses Fixed Slot software.
● Check your system s Hardware Manual for more installation details.
● Maximum con guration for 4-slot cabinets with Fixed Slot software is 16 trunks, 32 exten-
sions
and 48 ports.
2. PCB Installation
2-1
Section 2, PCB INSTALLATION AND STARTUP
In this section . . . Page
Installing PCBs
(cont’d)
Analog Trunk (8ATRU and 4ATRU) PCB . . 2-11
8 Circuit Caller ID Daughter Board . . . . . . . 2-12
4 Circuit Caller ID Daughter Board . . . . . . . 2-14
Connecting Blocks . . . . . . . . . . . . . . . . . .2-16
Working with 8-Pin Jacks. . . . . . . . . . . . . . . 2-16
Punching Down the Cables. . . . . . . . . . . . . . 2-16
Making your own Cables . . . . . . . . . . . . . . . 2-16
In this section . . . Page
PCB Location - U Slot . . . . . . . . . . . . . . . .2-2
Where to Install the PCBs in your
U Slot System. . . . . . . . . . . . . . . . . . . . . . . 2-2
PCB Location - Fixed Slot . . . . . . . . . . . . .2-5
Where to Install the PCBs in your
Fixed Slot System . . . . . . . . . . . . . . . . . . . . 2-5
Installing PCBs . . . . . . . . . . . . . . . . . . . . . .2-7
Central Processing Unit (CPU) PCB. . . . . . . . 2-7
Installing the CPU . . . . . . . . . . . . . . . . . . . . . 2-8
Digital Station (16DSTU) PCB. . . . . . . . . . . . 2-9
Analog Station (8ASTU and 4ASTU) PCBs. 2-10
!! Important !!
Install telephones connected to DSTU and ASTU PCBs as
on-premise extensions only.
PCB LOCATION - U SLOT
2-2
Where to Install the PCBs in your U Slot System
(Figures 2-1 and 2-2)
Review System Configuration - U Slot on page 1-17 before
installing any PCBs.
● When installing PCBs in a U Slot 4 slot system, follow
Figure 2-1. You must install a 16DSTU in slot CN1.
● When Installing PCBs in a U Slot 8 slot system, follow
Figure 2-2. You must install a 16DSTU in slot CN1.
Item Description Location Max.
CPU Central Processing Unit CN0 1
16DSTU 16 Digital Stations CN1 1
All other PCBs CN2-CN8 7
Caution
Do not plug in the CPU PCB hot (i.e., with the
system power applied).
You can plug in ASTU and ATRU PCBs hot as
required.
You can plug in DSTU PCBs hot provided you
first disconnect the station cabling from the PCB.
2. PCB Installation
2-3
PCB LOCATION - U SLOT
Figure 2-1 4 SLOT PCB LOCATION
P/N 80005/A
P/N 80025A
P/N 80021/A
P/N 80005/A
P/N 80025
P/N 80021/A
P/N 80021/A
P/N 80011/A Ext. 401-408
P/N 80011/A Ext. 409-416
Default U Slot
setup with CPU
P/N 80025
Delete this slot!
Delete this slot!
Delete this slot!
Default U Slot
setup with CPU
P/N 80025
A
!! Important !!
2 16DSTU PCBs maximum
allowed in this configuration.
!! Important !!
2 16DSTU PCBs maximum
allowed in this configuration.
!! Important Note for 4 Slot Cabinets with CPU P/N 80025A !!
Your system slot assignments must be reprogrammed:
● Using 9902 - Slot Control, delete slots 2-8 and reprogram your slot assignments as required.
Even though your system has only 4 slots, slots 2-8 exist the data base and must be reprogrammed.
● Slot 1 is permanently assigned as the system
s first 16DSTU PCB and cannot be changed.
Defaults shown
80000 - 58
80000 - 58
Power Supply
CPU
16DSTU (300-315)
16DSTU (316-331)
16DSTU (332-347)
16DSTU (348-363)
Power Supply
CPU
16DSTU (300-315)
16DSTU (316-331)
8ATRU (1-8)
8ATRU (9-16)
PCB LOCATION - U SLOT
2-4
P/N 80005A
P/N 80005A
P/N 80005A
P/N 80025A
P/N 80021A
P/N 80021A
P/N 80021A
P/N 80021A
P/N 80021A
P/N 80011A
Ext. 401-408
Ext. 409-416
Ext. 415-424
P/N 80011A
P/N 80011A
!! Important !!
When plugging in PCBs:
● Use the default assignments shown in the illustration below.
OR
● Using 9902 - Slot Control, delete
slots 2-8 and reprogram your slot assignments as required.
● Slot 1 is permanently assigned as the system
s first 16DSTU PCB and cannot be changed.
Defaults shown
Figure 2-2 8 SLOT PCB LOCATION
80000 - 59
Power Supply (if required)
Power Supply (if required)
16DSTU PCB (300-315)
16DSTU PCB (316-331)
Power Supply
CPU
8ATRU PCB (17-24)
8ATRU PCB (9-16)
8ATRU PCB (1-8)
16DSTU PCB (364-379)
16DSTU PCB (348-363)
16DSTU PCB (332-347)
2. PCB Installation
2-5
PCB LOCATION - FIXED SLOT
Where to Install the PCBs in your Fixed Slot
System (Figure 2-3)
Maximum Configuration: 16 Trunks
32 Extensions
Follow the chart below and Figure 2-3 when installing PCBs.
Item Description Location Max.
CPU Central Processing Unit CN0 1
16DSTU 16 Digital Stations CN1 and CN2 2
ASTU 4 or 8 Analog Stations CN2 1
8ATRU 8 Analog Trunks CN3 and CN4 2
Figure 2-3 FIXED SLOT PCB LOCATION
Power Supply
CPU
16DSTU (300-315)
16DSTU (316-331)
4ASTU (316-319)
8ASTU (316-323)
8ATRU (1-8)
8ATRU (9-16)
80000 - 28
Caution
Do not plug in the CPU PCB hot (i.e., with the
system power applied).
You can plug in ASTU and ATRU PCBs hot as
required.
You can plug in DSTU PCBs hot provided you
first disconnect the station cabling from the PCB.
PCB LOCATION - FIXED SLOT
2-6
— For Your Notes —
2. PCB Installation
2-7
INSTALLING PCBs
Central Processing Unit (CPU) PCB (Figure 2-4)
The CPU provides:
● The system’s central processing, stored program and memory
for the customer’s site-specific data.
● PC Card interface.
● Conference circuits, DTMF receivers and DTMF generators.
● External music input and on-board synthesized music source.
● External paging output and associated relay.
● Real Time Clock
● Battery for short term (14 day) backup of the customer’s
site-specific data.
Figure 2-4 CPU PCB
INSTALLING PCBs
2-8
Installing the CPU (Figures 2-5 and 2-6)
CPU PCB installs in the CN0 slot in the Main Equipment Cabinet.
● To install the CPU PCB:
1. Slide the Mode Switch to
the RUN position (see
Figure 2-5).
2. Insert the battery into the
battery clips.
3. Plug the CPU into slot CN0
(see Figure 2-6).
Refer to Part 4, Installing
Optional Equipment for
instructions on connecting the
music source, External Paging
and the auxiliary relay.
Figure 2-5 Setting up the CPU
Figure 2-6 INSTALLING THE CPU
Battery
Mode Switch
4 Slot Cabinet
Shown
8
0
0
0
0
- 2
6
0
3
-
0
0
0
0
8
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