ATT System 25 Installation And Maintenance Manual

							NSTALLATION
Prepare Carrier Loading Labels
As you connect the port CPs in each cabinet to the SIP, list the connections
on the Carrier Loading label. This label is mounted on the inside of the front
cover of the cabinet. (See Figure 2-29.) Keep track of –48 volt power usage
so that the power supply is not overloaded.
1.
2.
3.
4.
Enter, the CP type under the appropriate slot number.
For each port, enter the terminal type and the unit load, referring to
the Unit Load by Station Set Type label attached near the Carrier
Loading label. (This information is also contained in Appendix C of
this manual.) No port can have a unit load greater than 2.
When you have made entries for all- the ports of a CP, calculate the
total unit load for that CP and enter the calculation in the
appropriately marked square.
When you have made and documented all the connections for a
cabinet, check the total unit load to make sure that it does not
exceed the maximum of 80. (See Appendix C for more information
on evaluating unit load.)
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							INSTALLATION
2-68 
						

							INSTALLATION
Modify Octopus Cables if Required
If flag--type cable ties are shipped loose, they must be installed on the early
production octopus cables. The flag-type cable tie location depends on the
type of SIP arrangement (Figures 2-16 and 2-17). Also, if the alternate SIP
arrangement is used, later production octopus cables must be modified.
1.Check the octopus cables, if they have flag-type cable ties, go to
Step 3. Otherwise, go to step 2.
2. Install flag-type cable tie so that the eight free ends of the octopus
cable are 65 inches long for the standard SIP arrangement or 77
inches long for the alternate SIP arrangement.
3. If the alternate SIP arrangement (Figure 2-17) is used, clip off the last
flag-type cable tie so that the eight free ends of the octopus cable
are 77 inches long (Figure 2-30).
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							INSTALLATION
TO SWITCH 
TO SWITCH 
DISTRIBUTION RINGFLATTEN OCTOPUS CABLE
BEFORE FEEDING
INTO THE
50A FANNING STRIP
ION THE FLAG
MOD PLUG ENDS TO
FAN OUT TO
(D-RINGS) AS REQ’DADAPTERS ON SIPTIE WRAP IN FRONT
OF THE WIRE FORM
SIP
 FLAG TIE WRAP
WITH OCTOPUS CABLE
IDENTIFICATION LABEL
Figure 2-30.Standard and Modified Octopus Cables
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							INSTALLATION
Make SIP Connection for CPU/Memory
In all cases, the CPU/Memory is connected to the SIP via an octopus cable.
Since there are four ports on the CPU/Memory (port 1 for the SAT, port 2 for
SMDR, port 3 for the DTU, and port 4 [reserved]), plugs 1 through 3 on the
octopus cable are used to connect the peripheral equipment. (Plugs 7 and 8
connect to the ETU; plugs 4, 5, and 6 are not used.) Plugs 1, 2, 3, 7, and 8
plug into a designated adapter on the SIP.
1.
2.
.
3.
4.
5.
6.
7.
Before installing the octopus cable for the CPU/Memory CP, label
the 25-pair connector and flag-type tie wrap with a CAB 1 SLOT1
label from the cable label sheets (Figure 2-7). Position the label on
the back of the hood of the 25-pair connector.
Label the octopus cable legs, close to the modular plugs, as follows:
LegLabel
1SYSTEM ADMIN. TERM
2SMDR
3DIGITAL TAPE UNIT
7ETU 1 SWITCH (CPU)
8ETU 2 SWITCH (CPU)
Connect the cable to Cabinet 1, slot 1, and run the cable horizontally
through the D-rings to the 50A Fanning Strip.
Mount the cable in the fanning strip (Figure 2-31).
Insert the octopus modular plugs into the Z210A2 Adapter jacks on
the SIP per the Voice and Data Station Records Form (Figure 2-26).
If an ETU is provided, connect modular plug 7 to
on the ETU.
If a second ETU is provided, connect modular
(cpu) jack on second ETU.SWITCH (cpu) jack
plug 8 to SWITCH
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							INSTALLATION
FLAG-TYPE
CABLE TIESSTANDARD CABLE
I
MODIFIED CABLE FOR
(FLAG TIE
ALTERNATE SIP ARRANGEMENT
AT 65” REMOVED)
Figure 2-31.Mounting Octopus Cable on Fanning Strip
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							INSTALLATION
Make SIP Connections to Cabinet for 7300H Series Terminals
1.
2.
3.
4.
5.
6.
7.
8.
9.
Select the cable label sheet (Figure 2-7) that identifies the cabinet
(blue for #1, orange for #2, and green for #3).
On an octopus cable, attach an appropriate label (CAB1 SLOT8, for
example) on the last flag-type cable tie and on the back of the hood
of the 25-pair connector.
Connect the 25-pair connector end of the octopus cable to an
appropriate receptacle (ZTN79) on the switch cabinet.
Run the octopus cable horizontally through the D-rings and mount it
on the 50A Fanning Strip as shown in Figure 2-31.
Repeat the previous steps for each ZTN79 receptacle, so that all
octopus cables linking 7300H Series terminals to the cabinet are
labeled and run to the 50A Fanning Strip.
Check the Voice and Data Station Records Form to see which SIP
adapter jacks are connected to 7300H Series terminals.
Connect port 1 of the first ZTN79 to the primary attendant console.
Connect port 2 of the same CP to the primary attendant’s Direct
Extension Selector (DXS) console (if present).
Connect the remaining plugs on the octopus cable to other 7300H
Series terminal SIP jacks. Connect other ZTN79 CPs to other 7300H
Series terminal adapters. Distribute the 34-button Deluxe and BIS
terminals equally among all ZTN79 circuit packs.
Fill in the port ID of each station on the Voice and Data Station
Records Form (Figure 2-26).
November 1995
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							INSTALLATION
Make 
SIP Connections to Cabinet for MET Sets
Follow the same procedure as for 7300H Series terminals to connect MET set
SIP appearances to the appropriate CPs as outlined below:
l
l
l
l
l
Note:
Connect the 25-pair connector to a TN735 CP
Attach a cable label to the octopus cable 25-pair connector and flag-
type tie wrap
Run the cable 10 the 50A Fanning Strip
Plug cable ends into the appropriate SIP adapters
Complete the Voice and Data Station Records Form.
Each TN735 CP supports only four MET sets. Therefore, only the first
four modular plugs on each octopus cable should be connected to the
SIP adapters.
Make SIP Connections to Cabinet for Single-Line Sets
Follow the same procedure as for 7300H Series terminals to conned single-line
voice terminal SIP appearances to the appropriate CPs as outlined below:
l Connect the 25-pair connector of the octopus cable to a ZTN78 CP
lAttach a cable label to the octopus cable 25-pair connector and flagtype
tie wrap
lRun the cable to the 50A Fanning Strip
lPlug the cable ends into the appropriate
Voice and Data Station Records Form.
For extended, off-premises, and out of-buildingadapters, and complete the
stations, follow the same
procedure as above, except connect the octopus cable to a TN742/TN746 CP.
For Connection to a TN746 CP, follow the procedure outlined below.
lAttach the connector marked “0’ of the 853B adapter to a TN746 CP
(0)
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November 1995 
						

							INSTALLATION
lAttach cable labels to the two octopus cable 25-pair connectors and
flag-type tie wrap.
lAttach octopus cables to the 853B adapter
lRun the cables to the 50A Fanning Strip.
lPlug the cable ends into the appropriate adapters, and complete the
Voice and Data Station Records Form.
November 1995
2-74a 
						

							INSTALLATION
Make SIP Connections for Data Terminals and Computers
Any RS-232C compatible data terminal, personal computer host computer, or
a STAR LAN NETWORK workstation can be connected in one of four ways:
lIf the terminal has a modem, it should be connected to a ZTN78 CP
in the same way as a single-line voice terminal.
l The terminal’s RS-232C port may be connected to an Asynchronous
Data Unit (ADU) and then to the SIP over standard building wiring.
Use an octopus cable to connect the SIP appearance to a TN726
CP.
l The terminal may be linked to a voice terminal at the workstation via
an ADU and connected to the SIP using the same cable run as the
associated voice terminal. (See Note below.)
lA STARLAN NETWORK workstation equipped with a Network
Access Unit (NAU) may be linked to a voice terminal and connected
to the SIP using the same cable run as the associated voice
terminal.This arrangement is described under Install STARLAN
NETWORK Interface. (see Note.)
Note:MET sets cannot share the cable run with an ADU. Use
separate 4-pair cable runs for the MET set and ADU. The
7300H Series voice terminals that share a cable run with an
ADU require local power.
The installation procedure for the last two types of connections listed is as
follows:
1.Determine the type of connection required for each data terminal and
computer from the Voice and Data Station Records Form (Figure 2-
26).
2. At the SIP, identify all wiring for voice/data connections. Remove the
octopus cable plug (if already inserted for a voice terminal). Insert a
WP90851, L1 Y adapter into each of the adapter jacks. Re-insert the
(voice circuit) octopus cable plug into the voice side of the Y adapter.
3. For STARLAN NETWORK workstations, connect the data side of the
Y adapters to IN jacks on a STARLAN NETWORK Network
Extension Unit (NEU). For all other terminals, connect TN726 CP
ports to the data side of the Y adapters (or to standard SIP adapter
jacks for data-only connections) with an appropriately labeled
octopus cable.
2-75