ATT System 25 Installation And Maintenance Manual

							INSTALLATION
MICROWAVE
INTERFACEMICROWAVE
INTERFACE
LIGHT-GUIDE
INTERFACELIGHT-GUIDE
INTERFACE
INFRARED
INTERFACEINFRARED
INTERFACE
655 FEET
MAXIMUM
ANY DS1
INTERFACE655 FEET
MAXIMUM ANY DS1
INTERFACE
Install
*DSX-1 REFERS
Figure 2-24.DS1
Customer Service
TO A PHYSICAL CROSS-CONNECT FOR DS1 SIGNALS
Connections—Non Metallic Connections
Unit (CSU)
The CSU may either be rack mounted or mounted as a standalone unit. It
can be equipped with several different plug in units, the Signal Monitor Unit,
T1 Office Repeater, and a Fault Location Filter.
Install the Plug In Units
Refer to the documentation provided with the CSU for the information for
setting the options and installing the plug in units.
Mount the CSU
The CSU may either be rackmounted or mounted as a standalone unit. If the
CSU is to be rack mounted, insert the unit and attach it to the cabinet
uprights using four screws.If the unit is a standalone unit, place it in the
designated location.The CSU should be mounted as close to the network
interface as possible.
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							INSTALLATION
Connect the CSU
The CSU can be powered by the line or from a locally provided -48 V dc
power supply. Figure 2-25 shows the connections for connecting the CSU.
The 48 V and GRD leads are optional according to how the CSU is powered.
H600 307 ,02
CONNECTOR
CABLE (NOTE)
NOTE : FOR DISTANCES OVER 50 FEET ( 15.2 M)
USE C6E CONNECTOR CABLE(S) BETWEEN
H600 307,02 CONNECTOR CABLE AND DS1
TRUNK CIRCUIT PACK .TO LOCALLY
PROVIDED -48V
POWER SUPPLY
Figure 2-25.CSU Connections
Line Compensation/Equalization
Determine the cable distance of the line, either to the line termination or
“phantom”midpoint of a direct connection.
Refer to the System 25
Administration Manual (555-540-650) for instructions on setting the line
equalization.
Connect Coupled Bonding Conductor (CBC)
Each network interface (RJ48X) is associated with a service entrance
(protector block) ground. A CBC should be connected to this ground. If the
local telephone company has not run a CBC up to the network interface, you
should run it yourself. Use #12, #14, or #16 AWG wire. Start the CBC at
the protector block ground, and run it as close as possible to the facilities
cable. If possible, tie wrap the CBC to the facilities cable. Do not use spare
pairs in the telephone company cable for this purpose.
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							INSTALLATION
Consideration should be given to installing secondary protection on each
out-of-building facility connected to the TAE if any of the following conditions
exist:
l The service entrance (protector block) ground is not properly
installed (bonded to building ground, for example).
l The local telephone company does not permit access to the
protector block.
lHigh-voltage surge protection is not provided.
Install the CBC as follows:
1.Connect one end of the CBC to the ground point at the network
interface.
2. Wrap the CBC loosely around the cable from the network interface
to the TAE and then around a splitter cable to the cabinet. If
possible, tie wrap the CBC to the cables.
3. Connect the end of the CBC to the ground block on Cabinet 1. See
Figure 2-13.
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							INSTALLATION
INSTALL EQUIPMENT ROOM STATION CABLING
System 25 is connected to the building (station) wiring in two stages. First,
the building wiring is connected to the Station Interconnect Panel (SIP).
Then, the octopus cables from the back of the cabinets are connected to the
SIP.
Accurate documentation during installation is essential to the performance
and maintenance of System 25 and will make initialization and administration
much easier to perform.The Voice and Data Station Records Form (Figure
2-26) traces the connection from the workstation where the voice or data
terminal is located to the SIP. Obtain this form from the Implementation
forms that the TC or TCSS has prepared for system initialization. When you
install the station wiring, enter the jack number and SIP number for each
terminal to identify each end of the cable run. Number and label the station
jacks per local practice.
As the octopus cables
each station should beare connected to the SIP, the port assignment for
added to the Voice and Data Station Records Form.
Port assignments are identified by cabinet number (1, 2, or 3), circuit pack
slot number (1 through 12), and port number (1 through 8). For example
1-10-06 or 11006 identifies port number 6 in the circuit pack located in slot
number 10 of Cabinet 1. The port number is the same as the octopus cable
leg number.
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							INSTALLATION
.
2-61 
						

							INSTALLATION
Connect Building Wiring to SIP
The type of building wiring termination determines what types of adapters are
used. Two types are supported: 4-pair cable (cut down) and modular jack.
Any combination of adapters may be mounted on a 617A Panel. Cluster the
connection on the SIP by voice terminal type: single-line, 7300H Series*,
Multibutton Electronic Telephone (MET), and voice/data.
Modular Plug Termination
Each 4-pair modular plug supports one station (Figure 2-27). It connects to a
modular jack in a Z210A2 Adapter.
1.
2.
3.
4.
5.
6.
7.
Run the 4-pair cable through the rings at the top of the 617A Panels.
Connect the plug to any Z210A2 Adapter.
Feed the cable into the two purse lock clips at the adapter.
Using a felt-tipped pen, record the building wiring destination on the
adapter’s grey modular jack.
Repeat the process until all of the 4-pair building cables are
connected to the SIP. Some spare adapters should be left on the SIP
to accommodate growth.
Twist the purse lock clips closed.
Document the connections you have made on the Voice and Data
Station Records Form (Figure 2-26).
lThese terminals are also used in a MERLIN communications system.
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							INSTALLATION
Z21OA1
ADAPTER
(MODULAR TO
MODULAR)PURSELOCK CLIP
/
( TYPICAL)
Figure 2-27.Modular Plug Terminations Connected to the SIP
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							INSTALLATION
4-Pair Cable Terminations
Each 4-pair cable supports one station (Figure 2-28). It connects to a wiring
block on a 858A Adapter.
1.
2.
3.
4.
5.
6.
Run the 4-pair cable through the rings at the top of the 617A Panels.
Cut down the leads starting with Pin 1 of the wiring block located
beside the modular jack (Figure 2-28).
Wiring BlockDIW Cable
Pin No.Color Code
1W-BL
2BL-W
3W-O
4O-W
5W-G
6G-W
7W-BR
8BR-W
Using a felt-tipped pen, record the building wiring destination on the
wiring block caps.
Repeat the process until all of the 4-pair building cables are
connected to the SIP. Some spare adapters should be left on the
SIP to accommodate growth.
Feed the six cables for each adapter into the two purse lock clips at
the adapter. Twist the clips closed.
Document the connections you have made on the Voice and Data
Station Records Form (Figure 2-26).
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							INSTALLATION
ZZ1OA1
ADAPTER
(MODULAR TO
MODULAR)
PURSE
LOCK CLIP
(TYPICAL)
Figure 2-28.Cut Down Terminations Connected to the SIP
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							INSTALLATION
Connect Cabinets to SIP
Table 2-E shows the type of terminals that can be connected to each CP type
and the maximum allowable cabling distances to the system cabinets. Refer to
the Voice and Data Station Records Form for the terminal types assigned to each
workstation.
Caution:Connecting a terminal to the wrong type of CP can
damage the pack.
Table 2-E.Circuit Pack Versus Terminal Type
Circuit PackTerminal TypeDistance (in feet) From Cabinets
Using 24 AWG Wire
ZTN797300H Series and ATL2,000 (See Note 1 )
TN762Cordless Telephone
TN735
MET (4 Ports)1,000 (in-Building Only)
ZTN78Single-Line2,000 (in-Building Only,
Non-Bridged)
TN742Single-Line24,000 (or Class COPS)
TN746B
(Out-of-Building,
extended, or
off-premises)(Note 2)
TN726Data Terminals and2,000 (in-BuiIding Only,
Computers(Note 3)
TN767
I
Single-Line Off655 (Note 4)
Premises
Note 1:
/Vote 2:
Note 3:
Note 4:
Local (set) power is required for distances beyond
1,000 feet.
Only five sets can be bridged, and only two can be
off-hook at the same time.
This distance is for 19.2 Kbps data rate. At lower
speeds, the distance is greater. Also, this distance
can be limited by the terminal type. See the
Reference Manual(555-540-200) for details.
DS1 signaling for off-premises station. The
distance from the cabinet to the CSU is 655 feet.
2-66