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

							INSTALLING PCBs
2. PCB Installation
and Startup
2-28
E&M Tie Line (2EMTU) PCB(Figure 2-19)
The Tie Line (2EMTU) PCB supports system connections to 2-
wire Type 1 (four conductor), 2-wire Type 2 (6 conductor), or
4-wire (four conductor) E&M signaling tie lines. Each 2EMTU
PCB provides two 4-circuit tie line trunk interfaces and an on-
board power supply. The strapping option on the PCB allows
the use of either Type 1 or Type 2 signaling.
The Tie Line PCB requires the use of an EXCPRU daughter
board and a DTDU PCB installed in the first cabinet.
To install a Tie Line PCB:
1. Set the strapping options on the 2EMTU PCB as required
(see Figure 2-19).
2. Plug the 2EMTU PCB in slots 4-8 in any installed 124i 
cabinet (13 maximum).
3. Refer to Part 3: Installing Extensions and Trunksfor cabling
instructions.
Figure 2-19  TIE LINE (2EMTU) PCB
P/N 82492
1 2
1 2
1 2
1 2 
						

							2. PCB Installation
and Startup2-29
INSTALLING PCBs
DID (2DIDU) PCB(Figure 2-20)
The DID (2DIDU) PCB supports two Direct Inward Dialing
(DID) trunk circuits. The PCB has an on-board power supply
and an LED that shows when the PCB is in or out of service.
The DID PCB requires a DTDU PCB for DTMF receivers.
For the 28i system, please check with your Sales Representative
for availability of this feature.
To install a DID PCB:
1.28i:Plug DID PCBs into slots 2-5 in the KSU (4 trunk
PCBs maximum per system).
124i:Plug the 2DIDU PCB in slots 4-8 in any installed 
cabinet (13 maximum).
2. Refer to Part 3: Installing Extensions and Trunksfor cabling
instructions.
Figure 2-20  DID (2DIDU) PCB 
						

							INSTALLING PCBs
2. PCB Installation
and Startup
2-30
Page/Door Box (PGDU) PCB(Figure 2-21)
The Page/Door Box (PGDU) PCB provides:

DDK connectors for four External Paging Zones or Door
Boxes.


Selector switches to enable each port for External Paging or
Door Box. Each of the four PCB ports can be either an
External Paging port or a Door Box port - not both.


DDK connectors for four dry contact External Paging control
relays (one for each zone). These contacts can control a cus-
tomer-provided Paging amplifier or an entrance door strike.


Volume controls for each External Paging/Door Box circuit.


DDK connectors for four alarm/fax sensors.
To install a PGDU PCB:
1.28i:Plug PGDU PCBs into slots 2-5 in the KSU (2 PCBs
maximum per system).
124i:Plug PGDU PCBs into slots 4-8 in any installed 
cabinet (2 maximum).
2. Refer toPart 4: Installing Optional Equipmentfor more on
installing Door Boxes, External Paging equipment and
alarm/fax sensors.Figure 2-21  PAGE/DOOR BOX (PGDU) PCB
92001 - 35
Page/Door Box (PGDU) PCBMode Switches
for each circuit
Door Box / External Page
Volume Controls
DH
CN3
CN4
DHDHDH
PGPGPGPG
1 2 3 4VR1
Alarm 1Alarm 2Alarm 3Alarm 4Door Box 4 - External Page 4
Door Box 3 - External Page 3
Door Box 2 - External Page 2
Door Box 1 - External Page 1 Control Relay 4
Control Relay 3
Control Relay 2
Control Relay 1
VR2
VR3
VR4 
						

							2. PCB Installation
and Startup2-31 On initial power-up(with the CPRU performing a Cold Start),
the slot into which you plug a PGDU PCB determines its asso-
ciated External Paging and/or Door Box numbers. The system
scans the slots in order (Slots 2-5 in the 28i, Slots 4-8 in the
124i) for PGDU PCBs starting with the first cabinet (Main) and
ending with the last cabinet (Expansion # 2), if applicable. The
first PGDU PCB the system finds gets the lower-numbered
External Paging Zones/Door Boxes. For example, if configured
for Door Boxes, the first PCB would have Door Boxes 1-4,
while the second PCB would have Door Boxes 5-8.After initial power up(with the CPRU performing a Hot
Start), a new PGDU PCB you plug in automatically adds to
the top of your External Paging/Door Box list. For example, if
you already have Door Boxes 1-4, the new PCB you plug in
will start with Door Box 5. This is true regardless of the slot
number used.
INSTALLING PCBs 
						

							2. PCB Installation
and Startup
2-32
Tone Detector (DTDU) PCB(Figure 2-22)
The Tone Detector (DTDU) PCB provides outbound dial tone
detection for Off Premise Extensions and analog trunks. It also
provides DTMF receivers for certain types of inbound trunks.
These include:

DTMF DIDs


DTMF E&M Tie Lines


DISA


T1 DNIS


T1 DID


T1 Tie Lines
To install a DTDU PCBs:
1.28i:Plug DTDU PCBs into slots 2-5 in the KSU (2 trunk
PCBs maximum per system).
124i:Plug DTDU PCBs into slots 4-8 in any installed 
cabinet (2 maximum).Figure 2-22  TONE DETECTOR (DTDU) PCB
92001 - 34
Tone Detector (DTDU) PCB
Status LED
INSTALLING PCBs 
						

							2. PCB Installation
and Startup2-33
INSTALLING PCBs
28i Power-Up Sequence
Now that all the PCBs you need are installed, you can power-up
the system.
1. Install a surge protector in the AC outlet you intend to use
for system power.
2. Plug the AC power cord for the KSU into its surge protector.
System LEDs on Power-Up
PCB LED StatusCPRU Power-On Lights (green) when KSU
plugged in
Processor LED Flashes slowly (red) about
10 seconds after power-up
ASTU Status LED Flashes slowly (red) when
PCB activated (on-line)
The system is set up so that when powering up or resetting, the
system always performs a Hot Start (retains system programming).
To Cold Start the system (default the system), press and hold the
COLD switch down for approximately 10 seconds while either
turning on the power or pressing the reset switch on the CPRU. 
						

							2. PCB Installation
and Startup
2-34
INSTALLING PCBs
124i Power-Up Sequence
Now that all the PCBs you need are installed, you can power-up
the system.
1. Install surge protectors in the AC outlets you intend to use
for system power.
2. Plug the AC power cord for Expansion Cabinet # 2 into its
surge protector.
3. Plug the AC power cord for Expansion Cabinet # 1 into its
surge protector.
4. Plug the AC power cord for the Main Cabinet into its surge
protector.
System LEDs on Power-Up
PCB LED StatusCPRU Power-On Lights (green) when Main
Cabinet plugged in
Processor LED Flashes slowly (red) about
10 seconds after power-up
ASTU Status LED Flashes slowly (red) when
PCB activated (on-line)The power supply in the 124i cabinet uses two 4 amp fast-blow
fuses. If the system does not power up at this point, the problem
could be with the fuses. The fuses can be replaced by carefully
removing them from the holding clips.
Figure 2-23  FUSE REPLACEMENT
4 amp fast
blow fuses
926 - 81 
						

							2. PCB Installation
and Startup2-35
INSTALLING PCBs
Upgrading the Advanced Feature (EXCPRU)
Module Software Version for the 124i System(Figure 2-24 and 2-25)
The PC Card (P/N 92050xxx) is used to upgrade the 124i
EXCPRU. The following instructions should be followed care-
fully.
Note:To keep the customer’s information, set the mode switch
on the CPRU to the “HOT” position. Otherwise, the sys-
tem will default.
1.   Make sure the system is unplugged and the cover from the
main cabinet has been removed.
2.   Attach a grounded wrist strap to your wrist and a grounded
metal object (such as the CEU ground).
3.   Carefully install the PC card into the designated slot on the
EXCPRU.
Make sure the card is completely installed - it should
be flush with the Eject button (see Figure 2-24).4.   Set the switch on the EXCPRU to position 2 and reinstall
the CPRU.
5.   Power up the system.
6.   When the system reset is complete, carefully set the switch
on the EXCPRU back to position 1.
The system will briefly reset (approximately 15 seconds).
7.   Unplug the system again and remove the PC Card.
The CPRU will move and can slip out of it’s slot. Make
sure the CPRU is installed properly before proceeding.
8.   Replace the cover on the main cabinet and power up the
system.
9.   To make sure the upgrade was successful, enter the pro-
gramming mode by pressing CALL1  +  #*#*. The new
software version should appear on the upper right corner of
the display keyset.
10. Place the PC card back into it’s original case for storage. 
						

							INSTALLING PCBs
2. PCB Installation
and Startup
2-36 Figure 2-24  PC CARD
INSTALLATIONFigure 2-25  PC CARD AND EXCPRU LOCATION
92001 - 65
(EXCPRU) 92025
92001 - 64
Insert
92050** PC CardPosition 1
1
Position 2
1
Should
be flushPC Card
Eject Button 
						

							In this section  . . . . . . . . . . . . . .PageConnecting Blocks  . . . . . . . . . . . . . . . . . . .3-2
Working With DDK Connectors . . . . . . . . . . . 3-2
Punching Down a DDK Installation Cable . . . 3-2
Connecting Extensions  . . . . . . . . . . . . . . . .3-5
Digital Station (DSTU) Connections. . . . . . . . 3-5
Analog Station (ASTU) Connections . . . . . . . 3-7
Connecting Trunks  . . . . . . . . . . . . . . . . . . .3-9
Analog Trunk (ATRU) PCB Connections . . . . 3-9
Tie Line Trunk (2EMTU) PCB Connections . 3-11
DID Trunk (2DIDU) PCB Connections . . . . . 3-12
3. Installing
Extensions and Trunks
3-1
Section 3, INSTALLING EXTENSIONS AND TRUNKS