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

							1. Installing
Cabinets1-9
CONNECTING EXPANSION CABINETS
92001 - 30a
AC Cord
AC CordExpansion CEU #2
Expansion CEU #1
Main CEU
Ferrite FiltersEXIFU-S1 PCB EXIFU-S1 PCB
Figure 1-6  CONNECTING EXPANSION CABINETS 
						

							1. Installing
Cabinets
1-10
Connecting the Ground Wires on the 28i System
(Figure 1-7)
The 28i cabinet has two ground connections: ETH (Earth
Ground) and PBXG (PBX Ground).
1. Using 12 AWG stranded copper wire, wind three turns of the
ground wire around the core.
2. Loosen the lugs on both ground connections.
3. Using 12 AWG stranded copper wire, run a short jumper
between the ETH and PBXG lugs.
4. Using the piece of 12 AWG stranded copper wire that is
wrapped around the core, connect the PBXG connection to a
known earth ground.
5. Firmly tighten both the ETH and PBXG connections.
6. Using the plastic strap located at the base of the cabinet,
secure the core to the cabinet.
DO NOT PLUG IN THE CABINET POWER CORD WITHOUTFIRST INSTALLING THE PCBS.
Figure 1-7  GROUNDING A CABINET
92700 - 04
To earth ground
To telco ground
GROUNDING THE CABINETS 
						

							1. Installing
Cabinets1-11
Connecting the Ground Wires on the 124i
System (Figure 1-8)
Each 124i cabinet has two ground connections: ETH (Earth
Ground) and PBXG (PBX Ground).
1. Loosen the lugs on both ground connections.
2. Using 12 AWG stranded copper wire, run a short jumper
between the ETH and PBXG lugs.
3. Using another piece of 12 AWG stranded copper wire, con-
nect the PBXG connection to a known earth ground.
4. Firmly tighten both the ETH and PBXG connections.
DO NOT PLUG IN THE CABINET POWER CORDS WITH-OUT FIRST INSTALLING THE PCBS.ONCE ALL THE PCB’S HAVE BEEN INSTALLED AND THE
CONNECTIONS MADE, YOU MUST REPLACE THE KSU’S
COVER IN ORDER TO KEEP THE PCB’S IN PLACE AND TOPREVENT INTERMITTENT RESETS FROM A LOOSE PCB.Figure 1-8  GROUNDING A CABINET
Now that your cabinets are installed and grounded, go toPart
2: PCB Installation and Startup. 
To Verified
Earth Ground
926 - 43
ETHJumper
PBXG
GROUNDING THE CABINETS 
						

							2. PCB Installation
and Startup2-1
Section 2, PCB INSTALLATION AND STARTUP
Caution
Do not plug in PCBs with the power applied.
Always unplug the cabinet’s AC power cord before inserting or removing PCBs.
In this section  . . . . . . . . . . . . . .PageInstalling PCBs (cont.)
BRI (BRIU) Interface PCB . . . . . . . . . . . . . . 2-20
Analog Station (ASTU) PCB . . . . . . . . . . . . 2-22
Analog Trunk (ATRU) PCB . . . . . . . . . . . . . 2-24
Caller ID (4CIDU) Daughter Board . . . . . . . 2-25
Ground Start (4GSAU) Daughter Board . . . . 2-26
E&M Tie Line (2EMTU) PCB . . . . . . . . . . . 2-28
DID (2DIDU) PCB . . . . . . . . . . . . . . . . . . . . 2-29
Page/Door Box (PGDU) PCB . . . . . . . . . . . . 2-30
Tone Detector (DTDU) PCB. . . . . . . . . . . . . 2-32
28i System: Power-Up Sequence . . . . . . . . . 2-33
124i System: Power-Up Sequence . . . . . . . . 2-34
Upgrading the Advanced Feature (EXCPRU)
Module Software Version for the 124i . . . 2-35
In this section  . . . . . . . . . . . . . .Page28i Hardware Information  . . . . . . . . . . . . .2-2
System Load Factors . . . . . . . . . . . . . . . . . . . 2-2
PCB Location  . . . . . . . . . . . . . . . . . . . . . . .2-3
Where to Install the PCBs in a 28i System . . . 2-3
Where to Install the PCBs in a 124i System . . 2-4
Installing PCBs  . . . . . . . . . . . . . . . . . . . . . .2-4
Advanced Feature (EXCPRU) Module . . . . . . 2-6
Remote Programming (LAPBU) Module . . . . 2-6
28i System: Central Processing Unit (CPRU) . 2-9
124i System: Central Processing Unit (CPRU) 2-11
Upgrading CPRU Firmware . . . . . . . . . . . 2-13
Digital Station (DSTU) PCB. . . . . . . . . . . . . 2-15
T1/PRI (PRIU) Interface PCB . . . . . . . . . . . . 2-16
T1 to T1 Cable Pin Out . . . . . . . . . . . . . . 2-19 
						

							28i Hardware Information
2. PCB Installation
and Startup
2-2 The 28i system uses software comparable to the 124i basesys-
tem. This means that any features that are available in the 124i
base system are available in the 28i system as long as the soft-
ware level is the same. Check with your sales representative for
the availability of DID and BRI trunks.
System Load Factors
When connecting equipment to the 28i system, always consider
the Load Factor Table. This table shows the relative power
requirements for each device that you can connect. The following
PCB’s have noload factor: 24CPRU, 4CIDU, 4DTDU, 4PGDU,
4ATRU, 8DSTU, and LAPB. In order not to exceed the load
factor, the system should not exceed a maximum of two station
PCBs (either 8DSTU or 4ASTU).
To use the Load Factor Table:
1.  Multiply the number of devices (column 4) by their load factor
(column 3).
For example, 16 key telephones plus 1 ASTU have a
load factor of 23.
2.  Enter the result from step 1 in column 5 (Total Device Load).
3.  Add up all the entries in column 5. Total cabinet load can-
not exceed 23.Load Factor Table
Total
Connected Part Load Number Device
Device Number Factor Installed Load
All Key Telephones ---- 1DSS Console 92555 TBDDoor Box 88540 TBD2DIDU PCB 92016 8
4ASTU PCB 92040 7(includes 4 SLT’s)VAU Module (3 port) 92136 2
VAU Module and92136 +Expansion (6 port) 92137 2.52-OPX Module 92177 4ACI Module 92259 .5
DCI-A/B92266 or
92267 .5
3-DCI Module 92258 2
Total Cabinet Load (23 max.): 
						

							2. PCB Installation
and Startup2-3
PCB LOCATION
Where to Install the PCBs in a 28i System (Figure 2-1)Maximum 16 Trunks
Configuration: 20 Extensions (16 digital/8 analog)
(All configurations are not available at the same time.)The system’s universal architecture gives you flexibility when
installing PCBs. You can install a PCB in any slot, provided
you follow the guidelines in the chart below and keep within
the limits of the load factor. The number of extensions must be
limited to 20 due to the load factor for the system.
Item Description Location Max.24CPRU Central Processing Unit CPRU in Slot 1 1
8DSTU 8 Digital Stations Slot 2 1
4ASTU 4 Analog Stations Slots 2-5 2 *
*Due to Load Factors, the 4ASTU PCB maximum is limited to 2.
4ATRU 4 Analog Trunks Slots  2-5 4
2DIDU 2 DID Trunks Slots 2-5 42BRIU 2 BRI Circuits Slots 2-5 4
4PGDU 4 Page/Door Box Slots 2-5 2
4DTDU Dial Tone Detection Slots 2-5 2
LAPBU LAPBU Unit Installs on CPRU PCB 14CIDU Caller ID Installs on 4ATRU PCB 4
4GSAU Ground Start Installs on 4ATRU PCB 4Figure 2-1  PCB LOCATION
1
25 4 3
4 PDGU (Page/Door Box)
or
4 DTDU (Dial Tone Det.)
or
2 DIDU (DID) 4 ASTU (Analog Station)
or
4 ATRU (Analog Trunk)
or CPRU with optional
    LAPB PCB
or 8 DSTU (Digital Station)
4 ATRU (Analog Trunk)
4 PDGU (Page/Door Box)
4 DTDU (Dial Tone Det.)
2 DIDU (DID)or 4 ASTU (Analog Station)
92700 - 01
or
ororor
2 BRIU (BRI Trunk)or
2 BRIU (BRI Trunk) 
						

							PCB LOCATION
2. PCB Installation
and Startup
2-4
Where to Install the PCBs in a 124i System
(Figure 2-2)
Maximum Configuration: 52 Trunks
72 Extensions
The system’s universal architecture gives you great flexibility
when installing PCBs. You can install a PCB in any slot, provid-
ed you follow the guidelines in Figure 2-2 and the chart below.
Item Description Location Max.
32CPRU Central Processing CPRU slot  in Main 1
Unit
8DSTU 8 Digital Stations Slots 1-3 in any 3 per cabinet
cabinet 9 per system
PRIU 24 T1/PRI Trunks/ Slot 3 in any cabinet 1 per cabinet
Channels 2 per system
BRIU 2 Two-Channel Slots 4-8 in any 5 per cabinet
BRI Circuits cabinet 13 per system
4ASTU 4 Analog Stations Slots 1-8 in any 8 per cabinet
cabinet 15 (with DSTU) 
per system
16 (without DSTU)
per system4ATRU 4 Analog Trunks Slots 1-8 in any 8 per cabinet
cabinet 13 per system
2EMTU 2 Tie Line Trunks Slots 4-8 in any 5 per cabinet
cabinet 13 per system
4PGDU 4 Page/Door Box Slots 4-8 in any 2 per system
cabinet
4DTDU Dial Tone Detection Slots 4-8 in any 2 per system
cabinet
2DIDU 2 DID Trunks Slots 4-8 in any 5 per cabinet
cabinet 13 per system
EXIFU Expansion Interface CPRU slot in 1 per cabinetExpansion Cabinet 2 per system
EXCPRU CPRU Memory Exp. Installs on CPRU PCB 1 per system
LAPBU LAPBU UnitInstalls on CPRU PCB 1 per system
4CIDU Caller ID Daughter Installs on 4ATRU 8 per cabinet
Board PCB 13 per system
OR
4GSAU Ground Start Installs on 4ATRU 8 per cabinet
Daughter Board PCB 13 per system 
						

							2. PCB Installation
and Startup2-5
PCB LOCATION
Figure 2-2  PCB LOCATION
926 - 42
EXIFU-S1 PCB
8
7
6
5
4
3
2
1
8DSTU (Digital Station)
or
4ASTU (Analog Station)
or
4ATRU (Analog Trunk)
32CPRU
or
EXIFU (Expansion Interface) 4ASTU (Analog Station)
or
4ATRU (Analog Trunk)
or
4PGDU (Page/Door Box)2EMTU (Tie line)
or
2DIDU (DID Trunk)
or
or
4DTDU (Dial Tone Det.)
or
BRIU (BRI Interface)
or
PRIU (TI/PRI)EXIFU Ribbon Cables 
						

							INSTALLING PCBs
2. PCB Installation
and Startup
2-6
Advanced Feature (EXCPRU) (Figure 2-3)
The Advanced Feature (EXCPRU) Module is available only
for the 124i system. It provides the system with:

Automatic Call Distribution (ACD)


ISDN Capability


E&M Tie Lines


T1
To install the Advanced Feature (EXCPRU) Module:
1. Plug the Advanced Feature Module into the headers on the
right side of the CPRU PCB as shown in Figure 2-3.
2. Set the switch on the EXCPRU to position 1.
To upgrade the EXCPRU software, refer to page 2-35.
Remote Programming (LAPBU) Modules 
(Figure 2-3 and 2-4)
You’ll need the Remote Programming Module if you want to
use the PC Program with your system.
Figure 2-3  124i EXCPRU AND LAPBU MODULES
92001 - 40
Advanced Feature
Module (EXCPRU)
Remote 
Programming
Module (LAPBU)
Central Processor (CPRU) PCB 
						

							2. PCB Installation
and Startup2-7
INSTALLING PCBs
28i System (Figure 2-4)
The default settings for this card are: 9600 bps, Start bit=1,
Stop bit=1, Parity=No, Character=8 bit. The software requires
the baud rate be set to 9600 bps, so this item is fixed and can
not be changed.
To install the Remote Programming (LAPBU) Module:
1. Plug the Remote Programming Module into the header on the
CPRU PCB. The connector labeled CPRU on the LAPBU
module plugs into the LAPBU connector on the CPRU.
2. Connect the DIN-to-9 pin RS-232 cable (P/N 92707) to the
28i’s LAPB card. Refer to Figure 2-4.
This card provides an 8-pin connector for the cable.
3. The opposite end of the cable is connected to the COM port
on your PC.
Note that for the 28i PC Program, the modem initialize com-
mand must be entered asATD#*#*(The 124i system
requires an entry of ATDT#*#*.).Figure 2-4  28i LAPBU MODULE
92700 - 02
RSCN
CPRUDIN Connector for RS-232 Cable
    (Used for PC Programming)
Baud Rate Setting
Note:  Baud rate must
           be set at 9600.