ATT System 25 Installation And Maintenance Manual

							MAINTENANCE
Messages displayed on the SAT indicate which restart is being performed. The
same type of information is displayed for a cold and a warm restart. This
information consists of a listing of the version of the firmware loaded in the
CPU/Memory CP and a configuration
The CPU/Memory CP is not listed in
be located in slot 1 of Cabinet 1.
Table 4 A provides a listing of SAT
cold or warm restart. The displayed
and port translations.
listing of all CPs recognized by the system.
the configuration listing; however, it should
messages
message isthat may be displayed during a
a result of CP occupancy, type,
Displayed SAT Messages During Cold or Warm Start
CP IN SLOT
PORT
DISPLAYED
TRANSLATEDMESSAGE
NoYesMissing †.L
YesNoCP Type Listed #
YesYesCP Type Listed
YesYes (doesn’t matchCP Type Listed *
physical CP)
Yes (UnsupportedYes or No
Illegal
CP Type)
† Warm Start Only.
# Mark indicating that the CP is unused.
*Mark indicating that the CP is mismatched.
November 19954-25 
						

							MAINTENANCE
The SAT message for a cold restart appears after the system has performed
all self-tests and reading of its configuration. The time required for a cold
start depends on the number of CPs in the system but is generally several
minutes.
A typical Release 2 cold restart SAT message is as follows:
RESTART
TS ROM pair
FC ROM pair
FC ROM pair
FC ROM pair
C0LD START
SLOT
1
2
3
4
5
6
7
8
9
10
11
12
1: version 3.5 *
1: version 3.13 *
2: version 3.13 *
3: version 3.13 *
CABINET 1
ZTN85 06
ZTN79 03
ZTN79 03
ZTN79 03
ZTN79 03
ZTN78 02
ZTN78 02
ZTN78 02 
TN747 03
TN747 03
TN748 06CABINET 2
CABINET 3
TN753 04
TN760B 05
TN760B 05
TN760B 05
TN760B 05
l This is important information that should be noted in trouble reports.
After the restart message has been displayed, enter . The
system will respond with the following administration prompt:
SYSTEM 25 ADMINISTRATION
(CPU/Memory release information)
Enter password -->
4-26November 1995 
						

							MAINTENANCE
ERROR LOG
When a system maintenance object fails periodic testing, the system
automatically generates an error record.Depending on severity, the record is
stored in one of three tables in the Error Log. The Error Log contains the
following three error tables:
l Permanent System Alarms:These are failures that cause
degradation of service and require immediate attention. These
alarms will light the Alarm LED on the Attendant Console and are
stored in the Error Log Permanent System Alarm table. This type of
alarm also lights a red LED on an ‘associated CP. A red lighted LED
is a visual signal that service is required.
l Transient System Errors:These are potential failures that may
cause degradation of service, although they do not light the Alarm
LED on the Attendant Console. Transient System Errors have not
yet been verified by system self-tests, and/or have not reached the
level of a Permanent System Alarm.
If a transient system error is verified or reaches a certain level of
severity, it is reclassified as a Permanent System Alarm, and the
Alarm LED on the Attendant Console lights. Transient system errors
are stored in the Transient System Error table. The system stores up
to 40 Permanent System Alarms and Transient System Errors in
their respective tables in the Error Log.
l Most Recent System Errors: These are the ten most recent errors
recorded by the system, regardless of their severity. They do not
light the Alarm LED on the Attendant Console unless they escalate
to a Permanent System Alarm.
The Error Log is accessible through the SAT. Each error record is reported
as one line on the SAT (80 characters or fewer). Permanent System Alarms
and Transient System Errors tables use the same format. These error
records provide the location of the error (by port and CP type), the date and
time of the first occurrence and last occurrence of the error, the number of
times the error has occurred, and a description of the error.
4-27 
						

							MAINTENANCE
A typical error record from the Permanent System Alarms and Transient
System Errors table is as follows:
PERMANENT SYSTEM ALARMS
PORTBOARD FIRSTLASTCOUNT NAME
NUMBER CODEOCCURRED OCCURRED
10400ZTN130 23/12:30
Interpret this record as follows:
l“Port Number” 10400
specifying the location30/01:56
1Port Board missing
But Administered
is the 5-digit port identification number
of the error.The first digit indicates the
cabinet
(01-12),
the slot
l“Board(1-3), the next two digits indicate the slot within the cabinet
and the last two digits indicate the port number on the CP in
(01-08).
Code” ZTN130 is the CP on which the error occurred (or
that is associated with the error if this is an off-board error).
l“First Occurred”23/12:30 is the date and time of the first
occurrence of this error. The date is assumed to be the current year
and month. A 24-hour clock is used.
l“Last Occurred” 30/01:56, is the date and time of the last
of this error. The date is assumed to be the current year
A 24-hour clock is used.
l“Count” 1 is the number of times this particular error has
occurrence
and month.
occurred.
l“Name” Port Board Missing But Administered is a description of the
nature of the error. Descriptions are self-explanatory.
4-28 
						

							MAINTENANCE
Error records in the Most Recent System Errors table have a slightly different
format. A typical error record from the Most Recent System Errors table is
MOST RECENT SYSTEM ERRORS
PORTBOARD DATETIMENAME
NUMBER CODEOCCURRED OCCURRED
30300ZTN131 03/12/852:01:56
Port Board Missing
But Administered
Interpret this record as follows:
l“Port Number” 30300 is the 5-digit port identification number.
l“Board Code” ZTN131 is the circuit pack on which the error
occurred (or that is associated with the error if this is an off-board
error).
l“Date Occurred”03/1 2/85 is the date this error occurred. A
conventional calendar designation is used.
l“Time Occurred” 12:01:56 is the time this error occurred. A 24-hour
clock is used.
l“Name” Port Board Missing But Administered is a description of the
nature of the error.
A combined total of 40” (R1V1 ) or 50” (RIV2, R2V1, R3) error records for
Permanent System Alarms and Transient System Errors is stored by the
system. Ten error records are stored in the Most Recent System Errors
table. Errors are displayed in the order that they occurred.
lTwo or more instances of the same error result in only two entries in the log (that is, the first
and last occurrence).
4-29 
						

							MAINTENANCE
The Error Log is under the control of internal background maintenance
software that automatically escalates an error to a more serious category or
retires it. The system tests itself after a repair has been made. If the error
condition is corrected, the error may be removed from the Error Log.
Although some errors are automatically retired from the Error Log, they can
also be manually retired by entering commands at the SAT. Alarms,
conditions that light the alarm LED on the attendant console, can also be
manually retired in the same way.
Accessing the Error Log From the SAT
Follow these steps to read any of the tables in the Error Log from the SAT:
1.Confirm that the SAT is properly connected to the CPU/Memory CP
administration port.
2. If the SAT has a selectable baud rate, set it to 1200 baud.
3. Be sure that transmission parity is set to none, with the parity bit set
to space (0).
Note:For the AT&T Model 703 SAT, four pencil switches
under the paper compartment cover are set as
follows: switches 1 and 3 to “Off;” switches 2 and 4
to “On.”
4.Turn on the terminal, and press the carriage return key once or
twice. On most terminals, this key is  or .
5.After communication with the system’ is established, a prompt is
displayed:
Enter Password ->
6. Obtain the password from the system administrator. Enter the
password, and press .The main menu is displayed with
the prompt: Make one selection from menu ->.
7.Enter 8 (for the SEARCH selection), and press .
8. The SAT displays:
When search is defined type c to search >Action=
4-30 
						

							MAINTENANCE
9.
10.
11.
12.
.
If youEnter 1 and press .
The SAT displays:
SEARCHES: ACTlON=1 DATA=
Enter D.
The system completes the word Data followed by the = sign.
After Data= enter one of the following numbers, depending on
which error table you wish to see:
l 30 to see Permanent System Alarms
l 31 to see Transient System Errors
l 32 to see Most Recent System Errors.
select 30, for example, the system responds with: SEARCHES:
Action=1 Data= 30.
Now, enter the letter c to begin the search of this table. The c must be
entered repeatedly to access each line.
To remove a record from the Permanent System Alarms or Transient System
Errors table, enter the letter r.
If you enter a letter incorrectly, press the backspace key or CTRL H for the
Model 703 terminal. Each time you press this key, one character is erased.
If the message “P16; END OF LIST” is displayed. All errors in this list have
been displayed.
When you finish viewing one of the tables and want to view another error log
table, enter D. The system completes the word Data followed by the = sign.
Now enter the appropriate number for the table you want to view. (See
preceding Steps 11 and 12.)
If you want to return to the main menu at any point, type M and .
To log off, simply turn off the terminal.
4-31 
						

							MAINTENANCE
ERROR MESSAGES
Error messages,
along with the alarm indicators, are the most likely
indicators that an error has occurred in the system. When a maintenance
object fails periodic testing, the system automatically generates an error
record. The error record (log) is accessible through the SAT. The following
table lists and describes error messages that can be displayed on the SAT.
The table also includes possible solutions for some of the errors that are
encountered.
If the recommended solution includes CP replacement and, if repeated
replacement of hardware does not fix problems or similar problems seem to
be happening at many locations, suspect software problems. Contact the
Local FAST if this problem persists.
When the procedure indicates CP replacement, inspect each CP for the
following:
l Bent pins
l Damaged components (ICs, resistors, etc.)
l Correct firmware vintage (call local FAST for assistance).
After the inspection is complete, reseat the circuit pack and if the problem
persists, replace the circuit pack. When returning a defective board to MLO,
include the associated Error Log entries on the trouble ticket.
4-32 
						

							MAINTENANCE
ERROR MESSAGE
AND DESCRIPTION
POSSIBLE SOLUTION
AC Power Failure: An indicationCheck plug at wall receptacle. If
that ac power has been lost (forthis error occurs more often than
example, plug removed from athe building power outages, check
wall receptacle, building power
connection to wall.
down for more than a quarter of a
second, etc.). If power is lost from
the first cabinet, the ETU will be
triggered.
Alarm Log Overflow: The errorCorrect indicated errors, and then
logs are full and no more errorsremove entries from the Transient
can be written to them. This errorError Log to free-up space.
is kept, however, to alert you of
the fact.
ArchAngelInsaneRestart:Make sure ZTN85 or ZTN131 (R3)
Clocks may be missing from thecircuit pack (CP) is installed.
TDM bus.Check the inter-cabinet cables,
bus terminator and back plane for
bent pins. Reseat a port CP that
is in the same cabinet as ZTN85
or ZTN131 (R3). If it does not
power up,
replaceZTN85 or
ZTN131 (R3). If it does but
problem
persists,replace
CPU/Memory CP.
Arch Angel Interrupt Restart:
Possible software problem. If this
Systemrestarted
due toerror occurs frequently, check the
CPU/Memory problem.CPU/Memory CP.
Bad Oat Device:
(STARLANRecoverable; no action required.
Interface CP) This error is an
isolated transient condition.
4-33 
						

							MAINTENANCE
ERROR MESSAGE
AND DESCRIPTIONPOSSIBLE SOLUTION
Bad Port: (STARLAN InterfaceRecoverable; no action required.
CP) This error is an isolated
transient condition.
Bad Ringing Supply: ProblemsCheck ring voltage on associated
detected with ringing portion ofpower supply (see Figure 4-2).
power supply.
Belated External Release: 
SeeNormally, no action required;
“No External Release on PBXhowever ifproblem persists,
Disconnect. ”check for faulty trunk (see Figure
4-3).
BufferDeallocationFailure:If reset is not successful, reseat
(STARLAN Interface CP) Thisboard. If the reseat fails, replace
error resets the CP.the CP.
Bus Error Test Failed: Bus errorIf this problem persists, replace
circuitry failure.CPU/Memory CP.
Cold Start: System was restartedCheck the CPU/Memory CP to
and initialized to the default
see if the cold start strap was
translations. This error is loggedremoved. Strap is located at the
after a user forced cold start.bottom left quarter between pins
El and E2. An error message will
be displayed on the SAT during
system initialization if a cold strap
is installed.If the strap is
installed,removeit.If the
CPU/Memory CP was removed
while in use, the system may
performa cold start due to
corruption in translations. Restore
systemas described in the
Administration Manual.
CPU ROM Checksum Error: CPUIf this problem persists, replace
has failed the ROM test.the CPU/Memory CP.
4-34