ATT System 25 Installation And Maintenance Manual

							INSTALLATION
Cold and warm starts both display the same type of information on the SAT. This
consists of a listing of the version of the firmware loaded in the CPU/Memory
CP, followed by a configuration listing of all CPs recognized by the system. The
CPU/Memory CP is not in the configuration listing; however, it is located in slot 1
of Cabinet 1.
Table 2-C provides a listing of SAT messages
cool or warm start. The displayed message is
and port translations.
that may be displayed during a
a result of CP occupancy, type,
Table 2-C. Displayed SAT Messages During Cold or Warm Restart
Circuit Pack (CP)Port Translated
Displayed
in Slot
Message
NoYesMissing †
YesNoCP Type Listed #
Yes
YesCP Type Listed
YesYes (doesn’t matchCP Type Listed*
physical CP)
Yes (UnsupportedYes or No
Illegal
CP Type)
† Warm restart only.
# Mark indicating that the CP is unused.
* Mark indicating that the CP is mismatched.
November 19952-37 
						

							INSTALLATION
The SAT message for a cold or warm start appears after the system has
performed all self-tests and reading of its configuration. Typical cold start SAT
message is as follows. The example is for a 2-cabinet system.
Typical Release 3 Version 3 Cold Start Message
RESTART
TS ROM pair
1:version 3.5 *
FC ROM pair
1:version 3.13 l
FC ROM pair
2:version 3.13’
FC ROM pair
3:version 3.13 *
COLD START
Default Password in Effect
SLOT
1
2
3
4
5
6
7
8
9
10
11
12
CABINET 1
CABINET 2 CABINET 3
ZTN85 06
TN75304
ZTN79 03
TN760B 05
ZTN79 03
TN760B 05
ZTN79 03
TN760B 05
ZTN79 03
TN760B 05
ZTN78 02
ZTN78 02
ZTN78 02
TN74703
TN74703
TN748 06
* This is important information that should be noted in trouble reports.
Message: Type  for prompt.
Enter . The system will respond with the administration prompt:
SYSTEM 25 ADMINISTRATION
(CPU/Memory release information)
AT&T Copyright 1988
Enter password -->
2-38
November 1995 
						

							INSTALLATION
Check Performance of Cabinet Components
Each CP has three colored LEDs on the front panel that indicate whether it is
functioning properly or not.When a cold start is performed, the system
undergoes a series of self-tests and loads default translations.
Upon initial power application, each CP tests itself. The red LED on the CP
lights to indicate that the test is in progress. Once the CP passes its initial
tests, the red LED goes off. Then, after the main processor recognizes the
CP and can communicate with it, the green LED lights. When all green LEDs
are lighted, the testing and loading process is complete. This process takes
about 3 minutes.
1.Make sure that both fans in each cabinet are on and operating.
2. Make sure that the green LED on the power unit behind the fan
assembly is lighted.
3. Check the CP LEDs. Table 2-D lists the LED status of each type of
CP.
2-39 
						

							INSTALLATION
Table 2-D.
Circuit Pack LED Status Indications
Circuit Pack TypeLEDs if NormalLEDs if Failed
Service Circuit (ZTN85Steady Green andSteady Red or
or ZTN131 [R3])Flashing orAmber Off
Steady Amber
CPU/Memory (ZTN129Flashing GreenSteady Green
or ZTN130 [R3])
or Off
All OtherSteady GreenSteady Red
(Amber Also lighted
(see Note below)
when CP in use)
Note:The red and green LEDs can both be lighted at the same
time. In normal operation, a lighted red LED indicates that
an alarm has been recorded for that CP. If the green LED is
also lighted, the main processor can communicate with the
CP. A lighted amber LED indicates that a resource on the
CP is being used.A lighted red LED and a dark green LED
indicates that the CP diagnosed itself to be so bad that it has
removed itself from the system.
2-40 
						

							INSTALLATION
If all the CPs are operating properly, only the green LED on the CPU/Memory CP
and the amber LED on the Service Circuit should be flashing. If any other CP
has a no-lighted LED, the CP may need to be reseated. All port CPs green LED
remains dark until at least one port on the CP has been translated.
Except for the CPU/Memory CP and Service Circuit CPs, power can be left on
while a CP is reseated. To reseat a CP, do the following:
1.
2.
3.
4.
5.
6.
7.
See CAUTION. Make sure your hands are clean and dry. Put on a wrist
grounding strap, and clip it to the grounding block at the rear of the
cabinet.
Caution: Static electricity can damage a CP.
With your thumb, pull up on the latch pin of the removal lever. (See
Figure 2-15.)
When the latch pin is up, pull the removal lever down until it stops, at an
angle of about 30 degrees to the floor.
Tugging hard, pull the CP out a few inches. Leave it out for at least 30
seconds, and then push it back firmly into its slot. When it is almost back
in place, you’ll feel resistance. The removal lever will start to return to its
vertical position.
Push the lever all the way to vertical until it catches on the latch pin.
After the power-up, repeat this process for each CP with dark LEDs
(except for ZTN129 orZTN130 [R3] and TN763s).
Recheck the LEDs on all CPs. (If a CP’s LEDs are not lighted, the CPs
are considered “unadministered” by the CPU. ) A lighted red LED on any
CP indicated that it is faulty.
November 19952-41 
						

							INSTALLATION
Figure 2-15.Typical System 25 Port Circuit Pack
Report Problems
Follow local procedures to report faulty or damaged equipment.
2-42November 1995 
						

							INSTALLATION
Initialize System
Instructions
for initializing the system(based on the completed
implementationforms) are provided in the Administration Manual
(555-540-500).
Note:Before trunks using DS1 Signaling are administered, all link
level parameters such as signaling and framing and all link
level alarms must be cleared. If this is not possible, PBXs at
each end will not work.If this condition exists, clear a
maintenance busy condition that exists at each end.
INSTALL CROSS-CONNECT EQUIPMENT
Before starting, familiarize yourself with the following equipment described in
CROSS-CONNECT EQUIPMENT DESCRIPTION:
l Trunk Access Equipment (TAE)
l Station700 A-110-B1 -25 or 700A-66-B1-25 Wiring Jacks
10B Emergency Transfer Units
Interconnect Panel (SIP)
617A Panels
858A or Z210A2 Adapters
50A Fanning Strips.
Figure 2-16 shows a typical SIP and TAE backboard layout. Figure 2-17
shows an alternate layout that can be used when horizontal wall space is
limited. These layouts can be reversed when the switch cabinet(s) must be
installed to the right of the backboard.
2-43 
						

							INSTALLATION
Install TAE, 617A Panels, and Fanning Strips
To install this equipment, proceed as follows:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
For each RJ21X, RJ2GX, and RJ48X
700A Jack 1/2-inch from the edge of
switch cabinet(s).
Mount the first 617A Panel.
network interface, install one
the backboard closest to the
Position and mount the first 50A Fanning Strip next to the 617A
Panel. The edges should overlap so that the same screws will go
through the overlapping key slots in the 50A Fanning Strip and the
617A Panel. The bottoms of the fanning strip and panel are flush.
If required, mount a second 50A Fanning Strip above the first.
Mount the first 10B Emergency Transfer Unit (ETU) in the position
shown in Figure 2-16 or Figure 2-17. Overlap the edges of the ETU
and the panel so that the same screws will go through the
overlapped key slots.
Mount the remaining 617A Panels. Overlap the panels to conserve
space and to reduce the number of screws required; however, do
not mount more than three panels on either side of the 50A Fanning
Strip.
If required, install the second ETU above the first.
If additional ETUs are required, install them close to the 700A Jacks
(Figure 2-1 6). If the alternate SIP arrangement (Figure
install additional ETUs above the second ETU.
Using a felt-tipped pen, letter the adapter columns (A
the 617A Panels, starting with the left side. For
arrangement, start with the left side on the lower row.
Using a #12 AWG ground wire, connect the ground
2-17) is used,
through J) on
the alternate
points on the
ETUs (screw terminal on the upper left side) and link them to the
single-point ground.
Install D rings as required below the 700A Jacks and 617A Panels.
2-44 
						

							INSTALLATION
FIRST
108 ETUPLYWOOD
BACKBOARD
1/2
ADDL 700A
BLOCK
ADDL
ETUADDL 700A
BLOCK
ADDL 700A
BLOCK
ADDL
617A
PANELADDL
617A
PANELADDL
617A
PANELADDL
617A
PANELADDL 700A
BLOCKADDL
ETU
700A
BLOCKADDL
ETU700A
BLOCK
TO SWITCH
CABINET
D-RINGS AS REQD
FIRST
617APANEL FIRST 50A
FANNING
STRIPFLOORFREE HANGING OCTOPUS
CABLE WITH 65 FREE LENGTH
Figure 2-16.SIP and TAE Backboard Layout
2-45 
						

							INSTALLATION
NOTE: GREATER
THAN 48 FOR
5-PANEL
ARRANGEMENT
FIRST
108
ETU
Figure 2-17.Alternate SIP and TAE Backboard Layout
2-46