ATT System 25 Installation And Maintenance Manual

							INSTALLATION
4.Connect the cable to a protection device at the System 25 location.
5. Connect the second protection device to an 858A Adapter on the617A
Panel, using 4-pair inside wiring cable.
6. Connect the 858A Adapter to a port on a TN742 circuit pack using an
octopus cable.
Out-of-Building Voice Terminals (ZTN79)
Transmission facilities (voice pairs) that extend out-of-building and are not
included in the interface may be installed by the telephone company or through
other means (e.g., the building and/or property owner). These facilities, aerial or
buried, must be protected with voltage limiting devices and sneak current fuses.
The only exception to this rule is buried cable that is enclosed in a continuous
metallic conduit from one building entrance to the other. In this case, the conduit
must be connected to an approved building ground at each end.
If single-line terminals are extended out-of-building, standard protection devices
fcr voice pairs should be used. If 7300 H-type voice terminals are extended out-
of-building, the facilities must be protected with an In-Range Out-Of-Building
(I ROB) Unit Tll Model-343, PEC 32918, Comcode 406-106-583 at each end.
Terminals J1-3 and J1-6 of the IROB Unit should not be connected. Maximum
distance between a 7300H voice terminal and the system 25 cabinets is 2000
feet. There is no limit on how much of the 2000 feet may be locally powered
using the DS181 522 Kit-of-Parts, Comcode 105-105-514. (Only ZTN79 CP
supports 7300 H-type voice terminals. Secondary wiring protectors are listed in
Table 2-B.)
Off-Premises-DS1 Interface
The TN767 DS1 Interface can support up to 24 analog off-premises stations
through the use of a D4 channel bank.
Make the connections shown in Figure 2-41 at the S25. The CSU can be
powered by the line or from a locally provided -48 V dc power supply. The -48 V
and GRD leads are optional according to how the CSU is powered. For the
connections at the D4, refer to the D4 installation document (555-170-102).
Secondary wiring protectors are listed in Table 2-B.
2-96 
						

							INSTALLATION
H600 307 .G2
CONNECTOR
CABLE (NOTE)
TO D4
CHANNEL
BANK
NOTE; FOR DISTANCES OVER 50 FEET (15.2 M)
USE C6E CONNECTOR CABLE(S) BETWEEN
H600 307 .G2 CONNECTOR CABLE AND DS1
TRUNK CIRCUIT PACK.TO LOCALLY
PROVIDED -48V
POWER SUPPLY
Figure 2-41.
DS1 to D4 Connections for Off-Premises Stations
2-97 
						

							INSTALLATION
Stand-Alone Data Terminals
Data terminals and computers may be connected to the system through
ADUs or a Multiple Asynchronous Data Unit (MADU) without being linked to a
voice terminal. Depending on the data terminal that they connect to, some
ADUs may need supplementary power for proper operation. See Figures
2-42 and 2-43.
ADU Connections
1.
2.
3.
Unpack the ADU and examine for damage.
At the workstation, connect the ADU connector to the RS-232C
receptacle of the terminal or computer. Always tighten the screws
or other fasteners on this connection. If these connections are not
properly fastened, the Data Line CP port may be falsely busied out.
Connect a modular cord between the ADU Wall jack and the modular
wall jack.
2-98 
						

							INSTALLATION
LEGEND :
.
B1 -TYPICAL -103A CONNECTING BLOCK
C1 –MODULAR CORD (D8W-87)
C7–MODULAR POWER CORD (D6AP-87)
W1-4-PAIR INSIDE BUILDING WIRING CABLE
248B ADAPTER-ALLOWS MODULAR JACK CONNECTION FROM
2012D TRANSFORMER
400B2 ADAPTER-POWER ADAPTER
2012D TRANSFORMER -
15-18V AC TRANSFORMER
Z3A1 ADU -EQUIPPED WITH A 3 FOOT PLUG-ENDED EIA CORD
Z3A4 ADU -EQUIPPED WITH A 3 FOOT RECEPTACLE-ENDED EIA CORD
Figure 2-42.Local Powering of an ADU
2-99 
						

							INSTALLATION
LEGEND :
TN726 -DATA LINE CP
B1- TYPICAL -103A CONNECTING BLOCK
Cl-MODULAR CORD (D8W-87)
C7-MODULAR CORD (D6AP-87)
P2-MODULAR BULK POWER SUPPLY
POWER UNIT (346A)
POWER PANEL (346A-1)
W1-4-PAIR INSIDE WIRING CABLE
Z3A1 ADU -EQUIPPED WITH A 3 FOOT PLUG-ENDED EIA CORD
Z3A4 ADU -EQUIPPED WITH A 3 FOOT RECEPTACLE-ENDED
EIA CORD
Figure 2-43.Remote Powering of an ADU (Optional)
2-100 
						

							INSTALLATION
MADU Connections
The MADU provides a direct connection to a host computer or a large group
of data terminals (64 maximum). See Figure 2-44. The MADU has eight port
connectors; each port is equivalent to a single ADU. Complete installation
instructions for the MADU are contained in the MADU Product Guide (999-
700-525).
SYSTEM 25
CABINET
LEGEND :
TN726 - DATA LINE CP
MADU - MULTIPLE ASYNCHRONOUS DATA UNIT
SINGLE UNIT ASSEMBLY (8 ADU PORTS)
W2 - BUILDING WIRING ( 25-PAIR CABLE)
C10 - 25-PAIR CENTERFEED-TO-ENDFEED CABLE
(ALWAYS REQUIRED)
C11-M48C OCTOPUS CABLE (7-FOOT CORD WITH
EIGHT 6-INCH ARMS FOR “DTE” HOST INTERFACE)
C12-R48G OCTOPUS CABLE (7-FOOT CORD WITH
EIGHT 6-INCH ARMS FOR “DCE” HOST INTERFACE)
Figure 2-44.MADU to Host Computer or Terminals Connections
2-101 
						

							INSTALLATION
INSTALL CUSTOMER’S SAT
The SAT can be connected through the SIP to the CPU/Memory CP by any
one of the following methods:
l On-premises nonswitched connection (no ADU required if the SAT is
plugged into the system AC outlet)
l On-premises switched connection
l Off-premises nonswitched connection
l Off-premises switched connection.
SMDR equipment can also be connected by any of the four methods listed
above.The DTU can be connected only by the on-premises nonswitched
connection.
Nonswitched Connection of Equipment Plugged Into System
AC Outlet
See Figure 2-45.
1.Connect the RS-232C plug on the peripheral equipment to the RS-
232C receptacle on a 355AF Adapter (an extension cable may be
used).
2. Using a D8W-87 modular cord, connect the 355AF Adapter to the
appropriate SIP adapter jack.
2-102 
						

							INSTALLATION
LEGEND :
ZTN129-CPU/MEMORY CP
C1-MODULAR CORD (D8W-87)
C2 -OCTOPUS CABLE (WP90780)
355A ADAPTER -RS-232 PLUG TO MODULAR JACK
355AF ADAPTER -RS-232 RECEPTACLE TO MODULAR JACK
* PERIPHERAL EQUIPMENT
l SYSTEM ADMINISTRATION TERMINAL (LEG 1 OF OCTOPUS CABLE)
l DIGITAL TAPE UNIT (LEG 3 OF OCTOPUS CABLE)
l SMDR OUTPUT DEVICE (LEG 2 OF OCTOPUS CABLE)
Figure 2-45.Nonswitched Connection of Peripheral Equipment Plugged
into System AC Outlet
2-103 
						

							Nonswitched
See Figure 2-46.
Connection of Equipment
Note:Figure 2-46 shows an Z210A1 SIP Adapter to provide the
building wiring termination.An 858A Adapter can also be
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
used.
Connect the RS-232C plug on the peripheral
232C port on a Z3A1 or Z3A4 ADU. 
Always
other fasteners on this connection.equipment to the RS-
tighten the screws or
Connect the ADU to the building wiring with a D8W-87 modular
telephone cord.
At the SIP, connect the building wiring termination to an Z210A1
Adapter.
Locate the Z210A1 Adapter connected to the desired call processor
port. Connect a D8W-87 modular telephone cord to a Z210A1
Adapter jack.
Connect the other end of the modular cord to a 355AF Adapter.
Connect an M7U-87 Cord to the 355AF Adapter.
Connect the other end of the M7U cord to the RS-232C jack on a
Z3A4 ADU. Always tighten the screws or other fasteners on this
connection.
Connect the ADU to a 400B2 Adapter with two series connected
modular cords, D8W-87 and D8AM-87, as shown in Figure 2-46.
Connect the 400B2 Adapter to a 2012D supplementary power unit
with a D6AP Cord, as shown.
Plug the 400B2 Adapter into the SIP appearance (858A Adapter jack)
of the peripheral equipment.
2-104 
						

							INSTALLATION
LEGEND :
B1–TYPICAL -103A CONNECTING BLOCK
C1-MODULAR CORD (D8W-87)
C2 -OCTOPUS CABLE (WP90780)
C3-EIA CROSSOVER CABLE (P17U-87)
C4 -MODULAR RECEPTACLE TO MODULAR PLUG ADU CROSSOVER (D8AM-87)
C7-MODULAR POWER CORD (D6AP-87)
W1-INSIDE BUILDING WIRING CABLE
248B ADAPTER-ALLOWS MODULAR JACK CONNECTION FROM 2012D TRANSFORMER
355AF ADAPTER RS-232 RECEPTACLE TO MODULAR JACK
2012D TRANSFORMER -
15-18V AC TRANSFORMER
Z3A1 ADU -EQUIPPED WITH A 3-FOOT PLUG-ENDED EIA CORD
Z3A4 ADU -EQUIPPED WITH A 3-FOOT RECEPTACLE-ENDED EIA CORD
* PERIPHERAL EQUIPMENT
l SYSTEM ADMINISTRATION TERMINAL (LEG 1 OF OCTOPUS CABLE)
l DIGITAL TAPE UNIT (LEG 3 OF OCTOPUS CABLE)
l SMDR OUTPUT DEVICE (LEG 2 OF OCTOPUS CABLE)
NOTE :
DEPENDING ON EQUIPMENT, ADU MAY REQUIRE AUXILIARY POWER.
Figure 2-46.Nonswitched Connection of Peripheral Equipment Greater
Than 50 Feet and/or Not Sharing Same AC Outlet
2-105