ATT System 25 Installation And Maintenance Manual

							INSTALLATION
4.Complete the Voice and Data Station Records Form (Figure 2-26).
Make SIP Connections to Cabinet for ATL Cordless Telephones
Follow the same procedure as for 7300H Series terminals to connect ATL
Cordless Telephone SIP appearances to the appropriate CPs as outlined
below:
l Connect the 25-pair connector to a ZTN79 CP
l Attach a cable label to the octopus cable 25-pair connector and
flag-type tie wrap
lRun the cable to the
lPlug cable ends into50A Fanning Stripthe appropriate SIP adapters
l Complete the Voice and Data Station Records Form.
Perform SIP Housekeeping
Before continuing, make the SIP wiring neat:
1.
2.
3.
4.
5.
Make sure that the cables connecting the SIP to building wiring run
neatly through the rings at the top of the SIP. Check that all building
wiring cables connected to an adapter are run through the two
adjoining purse-lock clips and that the clips are twisted closed.
Bundle and tie by circuit type all octopus cable ends not connected
to the SIP. Place unused octopus ends for each cable in a plastic
bag and tie the bagged ends to one of the cables connected to the
SIP.
Make sure that octopus cables hang between the two cable
management posts at the bottom of each column of adapters.
Check that the octopus cables are properly dressed through the
fanning strips (Figure 2-31 ) and that the cables hang neatly between
the fanning strip and 617A Panels. Do not bundle and tie wrap
octopus cables between the fanning strip and SIP unless they are
unused.
Check that all octopus cables are run through the D-rings between
the fanning strips and the cabinet.
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6. Check that all cables are labeled.
INSTALL EMERGENCY TRANSFER UNITS
(ETUs)
The 106 Emergency Transfer Unit (ETU) (Figure 2-32) supports up to five
Power Failure Transfer (PFT) sets and a DID make-busy function. Up to four
ETUs can be supported for a maximum of 20 PFT sets. The sets can be
connected to selected loop-start or ground start trunks. PFT sets must be
FCC registered single-line sets.If ground start trunks are used, a ground
start button must be provided at each PFT set.
IMPORTANT: Only 2500MMGB, 2500MMGT, or 500MM sets may be
used as PFT sets. Only loop-start and ground start trunks can be used
for PFT service (no DID or tie trunks). Also, voice terminals that share
a cable with an ADU may not be used as PFT sets.
If power fails (switch has lost power or a major fault has occurred), a contact
closure is provided to the Central Office (CO) over a dedicated pair of wires.
The CO then makes all DID trunks busy. When power is restored, the
closure is removed and the CO restores DID service. External alarm contacts
areprovided on the front of the ETU for use as required.
Note:It is recommended that customers with DID service make
provisions with their CO to provide this arrangement.
The ETUs are mounted on the cross-connect backboard. Connections are
through 25-pair receptacle-ended (CO and SIP) and plug-ended (switch line
and trunk) connectors.Modular jacks are provided for the -48 V control
signal from the CPU/Memory and for additional ETUs. Screw terminals are
provided for the connection of external alarms.
Figure 2-33 shows a single-line voice terminal that has been connected as a
Power Failure Transfer station. In normal operation, the CPU/Memory CP
supplies -48 Vdc to the ETU. The voice terminal is connected through the
ETU to the station port CP and can support all calling activities. The trunk
connection through the ETU to the trunk port supports normal trunk calls.
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							INSTALLATION
Figure 2-32.10B Emergency Transfer Unit
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							INSTALLATION
Figure 2-33.Emergency Transfer Unit Connections
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							INSTALLATION
Make Emergency Transfer Connections
Note:The following procedure assumes that the network interfaces
1.
2.
3.
4.
5.
6.
7.
are connected to the 700A jacks and connector 0 of the 3:1
splitter cables has been connected to the jack. See Install
Equipment Room Trunk Cabling in this part.
Connect Trunk Lines From Cabinet to ETU
Using the cable label sheets provided (Figure 2-7), label both ends of
a B25A cable.Use a cabinet number and slot number (CAB1
SLOT8, for example) and the label SWITCH (TRUNK) on each end.
Position the labels on the rear hood of the connectors.
Connect the female end of the B25A cable to the connector marked
SWITCH (TRUNK) and the male end to the appropriate CO trunk CP
(ZTN76 or ZTN77) on the rear of the system cabinet.
Connect Port Lines From Cabinet to ETU
Label both ends of a B25A cable. Use a cabinet number and slot
number (CAB1 SLOT8, for example) and the label SWITCH (LINE) on
each end. Position the labels on the rear hood of the connectors.
Connect the female end of the B25A cable to the connector marked
SWITCH (LINE) and the male end to the appropriate station CP
(TN742 or ZTN78) on the rear of the system cabinet.
Connect 3:1 Splitter Cable to ETU
Label both ends of a 3:1 splitter cable. Use the label that identifies
the ETU number (ETU1 CO, for example) on connector O end and on
one leg of the cable (leg 3 contains the DID make-busy pair, if
provided). Position the Iabels on the rear hood of the connectors.
Connect the appropriate leg (1, 2, or 3) of the splitter cable to the CO
receptacle on the ETU.
Connect ETU to SIP
Label the flag tie-wrap and 25-pair connector of an octopus cable.
Use Iabel that identifies ETU number (ETU1 SIP, for example) on the
connector. Position the label on the rear hood of the connector.
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							INSTALLATION
8.
9.
10.
11.
12.
13.
Connect a 25-pair plug on octopus cable to the SIP receptacle on
the ETU.
Mount the octopus cable on the 50A Fanning Strip (Figure 2-31).
Connect all eight legs of the octopus cable to adapters (port side) at
the SIP. The first five stations (legs 1 through 5) are the Power
Failure Transfer stations.
Document the connections on the Voice and Data Station Record
Form (Figure 2-26).
Connect ETUs (Optional)
For systems having three or four ETUs connect ETU 1 to ETU 3
using a D8W-87 cord. Plug one end into the modular jack labeled
ADDITIONAL ETU on ETU 1 and the other end into the modular jack
labeled SWITCH (cpu) on ETU 3. Connect ETUs2 and 4 the same
way.
Connect External Alarm (Optional)
Connect the external alarm (if required) to the two screw
terminations labeled EXTERNAL ALARM on the upper right of the
ETU.
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							INSTALLATION
Install Ground-Start Key
If trunks are ground start (ZTN76 used), a ground-start key must be installed
on the Power Failure Transfer voice terminals. This key can only be installed
on voice terminals that have modular jacks.
1.Unplug modular line cord from voice terminal.
2.Plug KS23566, L1 key into voice terminal line cord jack.
3. Plug line cord into KS23566, L1 key.
KS23566 , L1 KEY
Figure 2-34.Ground Start Key Installation
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							INSTALLATION
INSTALL ATTENDANT CONSOLE
Most systems will have one or two attendant consoles. Release 2 Version 1
and Release 3 systems support direct trunk attendant consoles (DTAC) or
switched loop attendant consoles (SLAC). The system can support either
one or two of the DTAC or SLAC consoles but not a combination of DTACs
and SLACs. The installation procedures for the DTAC and SLAC are the
same.
The primary (or first) attendant console is a DTAC and is located (by default
translation) at the first port on the first ZTN79. (This can be changed to an
SLAC console using the SAT.)
In some cases, a DXS console (Figure 2-35) may also be used. The DXS is
the same for the DTAC and SLAC. The DXS is translated by default at the
second port of the same ZTN79. Its port number can also be changed using
the SAT.
1.
2.
3.
Unpack the attendant console and DXS console (if supplied) and
examine for damage.
Take the attendant console and a telephone line cord (D8W-87) with
modular plugs on both ends (or two cords if a DXS is supplied) to
the workstation where the attendant console will be used. The DXS
also requires a KS-22911, L1 power supply for local power, a 400B2
Adapter, and a D6AP-87 Cord (all included with the DXS).
Insert one end of the D8W-87 Cord into the designated modular jack
on the attendant console and the other end into a modular wall jack.
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Figure 2-35.Attendant Console With DXS Console
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							INSTALLATION
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
lf a DXS is supplied, place it beside the attendant console. For
locally powered DXS, do Steps 5 through 8. For remotely powered
DXS, do Steps 9 through 13.
Locally Powered DXS
Plug the 400B2 Adapter into the wall jack.
Plug one end of the D6AP-87 Cord into the 6-conductor modular jack
of the 400B2 Adapter; plug the other end into the KS-22911, L1
power supply.
Plug one end
of the 400B2
the bottom ofof the second
Adapter; plugthe DXS.
D8W-87 Cord
the other end
into the
into the8-conductor jack
modular jack on
Plug the power supply into an AC outlet.
Remotely Powered DXS (Figure 2-35)
At the SIP, locate the DXS appearance and disconnect the octopus
cable plug.
Insert one end of a D8W-87 Cord into the SIP adapter jack; plug the
other end into the 8-conductor modular jack on the 40062 Adapter.
Insert one end of the D6AP Cord into the 6-conductor modular jack
on the 400B2 Adapter; plug the other end into one of the modular
jacks on the 346A Power Unit.
Connect the modular plug on the
modular jacks on the 451A Adapter.
Connect the octopus cable plug to
451A Adapter.
400B2 Adapter to one of the
the other modular jack on the
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