Nitsuko Portrait 824 Hardware Manual

							Section 3
Installing Extensions and Trunks
In this section. . . Page
Connecting Blocks  . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Working With DDK Connectors  . . . . . . . . . . . . . . . . . . .3-3
Making Additional DDK Connectors  . . . . . . . . . . . . . . .3-3
Punching Down a DDK Installation Cable  . . . . . . . . . . .3-4
Connecting Extensions . . . . . . . . . . . . . . . . . . . . . . . .3-7
Station Connections  . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
Connecting Trunks  . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
Trunk Connections  . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
3-1
3. INSTALLING EXTENSIONS AND TRUNKS
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							3-2
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							Working With DDK Connectors
The system uses DDK-type connectors for extensions, trunks and
optional equipment. Using the optional DDK Installation Cables (4-
pin station cable=P/N 82490, 2-pin power failure cable=82491, and
2-pin C.O. line cable=82492) makes it easy to connect the PCBs to
standard 66M1-50 connecting blocks. The cables available for the
system are for CO lines (one-pair), keysets (2-pair), and Power
Failure Jumpers/auxiliary options (one-pair). If desired, separate
DDK connectors without cable can be purchased. In general, each
cabinet needs:
lTwo 66M1-50 block and DDK Installation Cable for extensions.
lOne 66M1-50 block and DDK Installation Cable for optional
equipment
lOne to eight (depending on your requirements) RJ11C modular
jacks and one DDK Installation Cable for trunks.
Making Additional DDK Connectors
(Figure 3-1)
To make DDKconnectors, using 22 or 24 gauge solid 2-pair twisted
wire for keysets or 22 or 24 gauge solid 1-pair twisted wire for CO
lines, single line telephones, Power Failure Jumpers, or auxiliary
functions, do the following:
1.Do not strip the wires. Insert the wires into the top piece (clear
plastic) of the connector. Following the standard color code:
#1=White/Blue, #2=Blue/White,
#3=White/Orange, #4=Orange/White
(Ignore #3 and #4 if only using 1-pair twisted wire)
Refer to Figure 3-4 for additional help with the color code. Make
sure that the wire ends do not protrude beyond the back of the
connector.
2.Place the top half of the connector over the lower half and press
down or use pliers to snap together. Verify that the connector
will not come apart and that all the wires are secure. Once
together, these connectors will not separate without breaking.
CONNECTING BLOCKS
3-3
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							CONNECTING BLOCKS
Figure 3-1  MAKING DDK CONNECTORS
Punching Down a DDK Installation Cable
The DDK Installation Cables have 4-pin DDK connectors installed
on one end and are unterminated on the other. 
1.For each 66M1-50 block, punch down the DDK Installation
Cable in standard color-code order.
Refer to Figure 3-3 if you need help with the color code.
2.After you have punched down your cables, route them through
the bottom of the cabinet and secure them with the strain relief
bar (Figure 3-2).
3-4
Upper Half
82400 - 30
Approx. 5/16
Lower Half DDK Connector Two pair twisted
telephone wire
WHT/BLU
BLU/WHT
WHT/ORN
ORN/WHT1 (T)
  2 (R)
    3 (H)
     4 (L)
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							CONNECTING BLOCKS
Figure 3-2  SECURING THE CABLES
3-5
82400 - 29
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							3-6
CONNECTING BLOCKS
Figure 3-3  CONNECTING BLOCK
- Only CPUNo Connection
- With one
expansion PCB
- With two
expansion PCBsT
R
H
L= Tip
= Ring
= High
= Low
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							3-7
Station Connections (Figure 3-4)
The CPU has 4-pin DDK connectors for eight stations. Each
Expansion (2CO/8STA) PCB provides for an additional eight sta-
tions. Two Expansion PCBÕs are allowed per system providing a
total of twenty-four stations per system.
Refer to Part 4: Installing Optional Equipment for instruc-
tions on connecting a power failure telephone.
Figure 3-4  STATION CONNECTIONS
1.Following the conventional color code, insert the DDK connec-
tors into the PCB. For example, the first eight stations in the sys-
tem would have these connections:
Ext./PortDDK Connector Pair
10WHT-BLU / BLU-WHT / WHT-ORN / ORN-WHT
11WHT-GRN / GRN-WHT / WHT-BRN / BRN WHT
12WHT-SLT / SLT-WHT / RED-BLU / BLU-RED
13RED-ORN / ORN-RED / RED-GRN / GRN-RED
14RED-BRN / BRN-RED / RED-SLT / SLT-RED
15BLK-BLU / BLU-BLK / BLK-ORN / ORN-BLK
16BLK-GRN / GRN-BLK / BLK-BRN / BRN-BLK
17BLK-SLT / SLT-BLK / YEL-BLU / BLU-YEL
Note that single line telephones only use one-pair wire
(T/R). When installing a single line set, the second pair is
not used (H/L).
2.Install a modular jack for each extension within six feet of the
telephoneÕs location. See Figure 3-5.
STCN
STCN CPU 2CO/8STA PCBTEL9/17
TEL1 10/18
TEL2 11/19
TEL3 12/20
TEL4 13/21
TEL5 14/22
TEL6 15/23
TEL7 16/24
TEL882400 - 25
CONNECTING EXTENSIONS
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							3-8
CONNECTING EXTENSIONS
3.For each keyset, run two-pair 24 AWG station cable from the
cross-connect block to the modular jack. For each single line
phone, run one-pair 24 AWGstation cable from the cross-con-
nect block to the modular jack.
4.Terminate the station cable to the module jack lugs:
WHT-BLU to GREEN lug
BLU-WHTto RED lug
WHT-ORN to BLACK lug  *
ORN-WHTto YELLOWlug  *
*  Lug not used when installing a single line phone.
5.Back at the MDF, run two pairs of cross-connect wires (or one
pair of cross-connect wires for single line phones) between the
pins on the B block and cross-connect block to complete the
connection.
6.Install bridging clips as required.
7.After completing step 6, you should be able to place and answer
calls at the extension.
Figure 3-5  CONNECTING KEYSET TELEPHONES
625
Modular
Jack
DDK Installation Cable
BLK YEL
RED
GRN BLU-WHTORN-WHTWHT-ORN
WHT-BLU
Cross
Connect
Block Two Pair
Cross Connect
B
Block
82400 - 5
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							3-9
CONNECTING EXTENSIONS
Figure 3-6  CONNECTING SINGLE LINE TELEPHONES
625
Modular
Jack
Single Line 
Telephone
BLK YEL
REDGRN BLU-WHT
WHT-BLU
One-Pair Cross-Connect
DDK 
Connector
25-Pair DDK
Installation CableB BlockCross
Connect
Block
82400 - 48
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							3-10
CONNECTING TRUNKS
Trunk Connections (Figure 3-7)
The CPU has 2-pin DDK connectors for four loop start COtrunks.
Each Expansion (2CO/8STA) PCB provides an additional two CO
trunk connections. Two Expansion PCBÕs are allowed per system
providing a total of eight trunks per system.
Refer to Part 4: Installing Optional Equipment for instruc-
tions on connecting a power failure telephone.
Figure 3-7  TRUNK CONNECTIONS
1.Following the conventional color code, insert the DDK connec-
tors into the PCB. For example, the CPU would have these con-
nections:
TrunkDDK Connector Pair
1WHT-BLU / BLU-WHT
2WHT-ORN / ORN-WHT
3WHT-GRN / GRN-WHT
4WHT-BRN / BRN WHT
2.For each trunk, run one pair of wires from the DDK connection
to a 625 modular jack, which then connects to the telcoÕs RJ11C
jacks using a standard line cord (Figure 3-8 on the following
page).
3.After completing step 2, you should be able to place and answer
calls over the connected trunk.
82400 - 24
CO6/8COCNCO5/7
2CO/8STA PCB
CO/PBX Line 6 or 8
CO/PBX Line 5 or 7
82400 - 26CO2CO3CO4COCNCO1
CPU
CO/PBX Line 4
CO/PBX Line 2 CO/PBX Line 3
CO/PBX Line 1
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