ATT System 25 Installation And Maintenance Manual

							MAINTENANCE
ERROR MESSAGE
AND DESCRIPTIONPOSSIBLE SOLUTION
DCFailTransientRecord:No action required; this error
Indicates a dc power failure.display is a record of the start
time of the failure.
DC Power Failed: Indicates theCheck the +5 V dc voltage level
absence of +5 V dc on a cabinet.on the power supply (see Figure
Each cabinet has its own power4-2).
supply; therefore, this may not
cause a warm start.
DC Power Restored:IndicatesIt is possible to produce this error
that +5 V dc has been restored.when a CP is inserted into a slot
The“DC Fail Check”log iswith power “On” (not a real
removed. This message keeps aProblem).
record of dc “hits.”
Down Link Buffer Overflow: TheRecoverable; no action required.
down-linkbuffer isreceiving
messages too fast.
DSP Insane:Service Circuit orIf a  DSP Sane  occurred, the
Tone Detector CP problem.
system will remove this error from
the permanent alarm table. If the
problempersists,check or
replace the faulty CP.
DSP Sane: DSP recovered fromRecoverable; no action required.
an insane condition.
Dual Port RAM Read-Back Failure:Check CP, and replace if required.
Service Circuit dual port RAM
problem.
WART Test Failed:PeripheralThis problem affects the tape,
port on CPU/Memory CP hasadministration,maintenance and
failed.
SMDR ports.If the problem
persists, replace the CPU/Memory
CP. 
						

							MAINTENANCE
ERROR MESSAGE
AND DESCRIPTIONPOSSIBLE SOLUTION
DXS Reset; The DXS console hasRecoverable; no action required.
been reset.
ElectronicPowerFeed Off,
Check the wiring for shorts from
Overcurrent:A Hybrid
Linethe backplane/SIP up to the
(ZTN79) port EPF chip shut down.phone jack. Check the ATL set at
Two ports are effected, for
the SIP. Try swapping ATL sets.
example, 1-2,3-4,5-6,7-8.
Error removed if Audit passed and
short removed. Audit runs every 4
minutes.
Electronic Power Feed Overload:Check the tie trunk pairs from the
A Tie Trunk (TN760B) port EPL
back of the cabinet through to the
chip went into overload.network for an external short (see
Figure 4-4). If the short is not
detected on the pairs, replace the
board.
Electronic PowerFeed Test
Check the E and M leads for
Overload: The “M” lead on a tieexternal shorts (see Figure 4-4). If
trunk has an external short circuit.the short is not on the pairs,
replace the board.
Empty CSMA Queue: (STAR LANIf the reset is not successful
Interface CP) This error resets thereseat board. If the reseat fails,
CP.
replace the CP.
Error Log Table Full: TransientCorrect indicated errors, and then
Error Log is full.remove entries from the Transient
Error Log to free-up space.
External RAM Failure: Port orReseat board. If problem persists,
CPU/Memory CP error whilecheck or replace appropriate CP.
runningbackgroundnon-
destructive external RAM tests.
4-36 
						

							MAINTENANCE
ERROR MESSAGE
AND DESCRIPTIONPOSSIBLE SOLUTION
External Stack Full: (STARLANIf the reset is not successful
Interface CP) This error resets thereseat board. If the reseat fails,
CP.
replace the board.
Fault onOutgoingSeizure:
Check trunk for slow dial tone;
ZTN76/TN747 CO ground was notmore than 10 seconds. Perform
detected within a predeterminedtrunktestcall
per“Trunk
time-frame.ZTN77/747loopTroubles”procedure in this
current was not detected within asection.If the problem persists,
predetermined time frame.see Figure 4-3.
Frame Length Error: (STAR LANRecoverable; no action required.
Interface CP) Packet length too
long for ZTN84.
.
Generator DSP Insane: ServiceIf a
“Generator DSP Sane”
Circuit problem.occurred, the system will remove
this error from the permanent
alarm table.If the problem
persists, check or replace the
faulty CP.
Generator DSP Sane:ServiceRecoverable; no action required.
Circuit recovered from insane
condition.
Ground But No Ringing: TheIncoming calls are okay. The
switch does not detect ringingproblem could exist at the CO,
from the CO within 5 seconds ofbad ringing generator or a bad
Tip ground on an incoming groundring detector on the board. The
start call.Tip lead could be getting ground
hits. Perform a trunk test call per
“Trunk Troubles”
procedure in
this section.
4-37 
						

							MAINTENANCE
ERROR MESSAGE
AND DESCRIPTIONPOSSIBLE SOLUTION
Illegal Instruction: This error isThe Problem could be with the
logged when an illegal instructionROM on the CPU/Memory CP. If
is encountered by the CPU.the problem persists, check or
replace CP.
Illegal Interrupt: CPU/Memory CPThe CP may still pass the power-
problem.up test for the ROM. Check or
replace the CPU/Memory CF.
Illegal Port Command: (STARLANRecoverable; no action required.
Interface CP) This error is an
isolated transient condition.
Illegal Port Interrupt: (STAR LANNormally, this is a isolated
Interface CP) This error is antransientcondition
thatis
isolated transient condition.recoverable; however, if problem
occurstoofrequently, a
permanentalarmwill be
generated.If problem persists,
check or replace CP.
Internal RAM Failure: Port CPCheck port CF.
error while running background
non-destructiveinternalRAM
tests.
InternalSanityTimeout:If the reset is not successful,
(STARLAN Interface CP) Thisreseat board. If the reseat fails,
error resets the CP.replace the CP.
Invalid Board Message: The portIf the problem persists, check or
CP sent an up-link message thatreplace the port CP.
is not in the expected message
set.
4-38 
						

							MAINTENANCE
ERROR MESSAGE
AND DESCRIPTION
POSSIBLE SOLUTION
Invalid Message Length: The portIf the problem persists, check or
CP sent an up-link message that
replace the port CP.
is not in the expected message
set.
Invalid Port Board:(Other thanRemove or replace CP with a
CPU or Memory) Port CP not
board that is supported by System
supported by system.25.
Invalid Port Message: The port
If problem persists, check or
CP sent an up-link message that
replace the port CP.
is not in the expected message
set.
LAN 
Protocol Error:(STARLANSystem will normally recover;
Interface CP) This error may behowever, if the problem persists,
caused by a defective endpoint on
a defective endpoint may exist on
the STARLAN NETWORK.
the STARLAN NETWORK (see
Figure 4-5).
Limited Default Cold Start: This isConnectSAT and
translate
a cold start after which only asystem.Perform
“Restore
limited
amount ofdefaultSystem” procedure listed in the
translations have been made. TheAdministration Manual.
CPU/Memory, Service Circuit, and
Tone Detector are the only CPs
initialized.
Memory Management Corruption:If problem persists, check or
Software audit determined andreplace CPU/Memory CP.
corrected memory management.
4-39 
						

							MAINTENANCE
ERROR MESSAGE
AND DESCRIPTIONPOSSIBLE SOLUTION
Memory Management Error: BusPossible
software
error.If
error that occurs while accessingproblem
persists,check or
the “other than protected” RAM.replace CPU/Memory CP. A
A warm start is logged after thiswarm start or retranslation of the
error.
system could be a possible fix for
this problem.
Memory ROM Checksum Error:If this problem persists, replace
Memory has failed the ROM test.CPU/Memory CP.
Message Corruption: (Other thanIf consistent error for particular
CPU/Memory)Down-link
port CP, check TDM bus drivers
message checksum error.on the CP. If error is associated
with many CPs, drivers on CPU
may be bad.Also check 1/O
cables and TDM bus terminator.
MessageFrom Non-TranslatedTranslate the CP and its port, or
Port: Untranslated port CP sentremove the CP from system.
an up-link message.
No External Release On PBXCheck associated trunk(see
Disconnect:CO did not releaseFigure 4-4). Error is cleared from
within 4-5 minutes on DID orlog when trunk release occurs
ground start trunk after System 25belatedly.
disconnected.Messagesent
every 4-5 minutes until release.
NoFreeBuffer:
(STARLANIf the reset is not successful,
Interface CP) This error resets thereseat board. If the reseat fails,
CP.replace CP.
No Loop Current On Incoming
Swap CP with similar CP. If
Call:CP does not detect dcproblem follows the boards,
current on answered incomingreplace CP. If problem persists,
call. Call will drop.
test the trunk per Figure 4-3. 
						

							MAINTENANCE
ERROR MESSAGE
AND DESCRIPTIONPOSSIBLE SOLUTION
On-HookBeforeReady To Receive
Digits: For a tie trunk with delay
dial or winkstart—after the
handshake is complete, a 50-ms
guard time must pass before
digits are received. If the far-end
goes on-hook before guard time
elapses, this message is logged.
On-Hook Before Wink: For a tie
trunk with delay dial or wink
start—if the far end goes on-hook
(possibly indicating the beginning
of a rotary dial digit) before the
wink handshake is completed, the
error is logged.A disconnect
sequence is started, and the call
may be dropped.
Recoverable; no action required.
If this problem persists, check the
tie trunk configuration (see Figure
4-6).
On-Hook During Wink: This error
indicates that digits are being sent
by the far end before the switch is
ready to receive them.The two switches are probably notcompatible.Checkthe
configuration of each switch.
PhysicalandLogicalType
Mismatch: (Other than CPU or
Memory) Port CP plugged into
wrong slot.
Port CP in Unadministered Slot:
(Other than CPU/Memory) Port CP
inserted into a slot that is not
translated or CP inserted into
wrong slot.Change translations to reflect the
new CP, or install the proper CP.
Translate slot, or remove CP. If
CP is in the wrong slot remove
and install CP into proper location.
4-41 
						

							MAINTENANCE
ERROR MESSAGE
AND DESCRIPTIONPOSSIBLE SOLUTION
Port CPMissingButCheck CP slot; reseat CP; change
“Administered:(OtherthanCP; orremoveCP
from
CPU/Memory) Translated port CPtranslations. If CP does not pass
that CPU cannot access.power-up, replace CP.
Port CP Out Of Service:
(OtherIf the CP has not been removed
thanCPU/Memory)Messageand the problem persists, check
occurs when a CP is removed
or replace the port CP.
from a cabinet. Error removed
when the CP passes power-up.
Port CP ROM Checksum Failure:Try reseating the CP. If this error
The port CP has found that thehappens again, then replace the
checksum on its firmware is bad.CP.
Port Buffer Full:
(STARLANIf the reset is not successful,
Interface CP) This error resets thereseat CP. If the reseat fails,
CP.replace the CP.
Port Fault: For an auxiliary trunk,Checkwiring of
external
this message is logged when aequipment (see Figure 4-7).
ground is expected from external
equipment and is not detected.
Port Queue Full:
(STARLANIf the reset is not successful,
Interface CP) This error resets thereseat CP. If the reseat fails,
CP.replace the CP.
Program
LogicInconsistent:Reseat CP. If problem persists,
(OtherthanCPU/Memory)replace it.
Possible hardware problem on
port CP.
RAM Test Failed: CPU/MemoryCheck CPU/Memory CP.
CP has failed the RAM test.
4-42 
						

							MAINTENANCE
ERROR MESSAGE
AND DESCRIPTIONPOSSIBLE SOLUTION
Received Incorrect Number of
DID Digits:
This error indicates
that the CO is set up to send a
number of DID digits different
from what the switch has been
administered to receive.Ensure that trunks are properlytranslated.Notify local CO to
verify the correct number of digits
to be sent. Test trunk per Figure
4-3.
RIMS Insane:Service Circuit or
Tone Detector CP problem.If an “RIMS Sane” occurred, the
system will remove this error from
the permanent alarm table. If the
problem
persists,check or
replace the faulty CP.
RIMS Sane: RIMS recovered fromRecoverable; no action required.
an insane condition.
ROM
ChecksumFailure:
CPU/Memory CP ROM checksum
test has failed.If the problem persists, check orreplace the CPU/Memory CP.
Ringing Without Ground: Ground
was not detected from CO within
5 seconds from the time ringing
starts.Check Tip/Ring for possible
reversal.
Service Circuit In Mismatched
slot:Service Circuit in slot
translated for other type CP; two
ServiceCircuitsmountedin
cabinet. Only one Service Circuit
(ZTN85 or ZTN131 [R3]) allowed
persystem.Additional
tone
detection available using Tone
Detector CP (TN748).Ensure that only one ZTN85 or
ZTN131 (R3) is in the system. If
there are others, remove them.
Also make sure that the ZTN85 or
ZTN131 (R3) is in it’s translated
slot.
4-43 
						

							MAINTENANCE
ERROR MESSAGE
AND DESCRIPTIONPOSSIBLE SOLUTION
ServiceCircuitTestFailed:
Check TDM bus terminator and
Service Circuit demand test failedcabinet interconnect cables. If the
on the DTMF receivers.problem persists, replace ZTN85
or ZTN131 (R3).
Signaling Lead Fault: AuxiliaryCheckwiring of
external
Trunk CP is expecting a groundequipment per Figure 4-7.
from external equipment but none
is detected.
SlotConfigurationError:This condition can be resolved by
(STARLAN Interface CP) Thismoving the ZTN84 port CP to
error means that another ZTN84another slot in the carrier.
port CP is on the STARLAN
NETWORK and has the same
physical address.
System Lock-Up: This error isUsually, noactionrequired;
logged by the task supervisor if,however if
problem persists,
during scheduling of tasks, noreplace CPU/Memory CP.
messages have been read for at
least 60 seconds. This causes a
restart of the system.
System Restart: System lockedCheck the power supply voltages
up in a software task. The “Portper Figure 4-2. If problem persist,
Number” entry in the log is thethe CPU/Memory CP could be
task at fault.defective.
Translation Memory Test Failed:Check if Cold Start error has
Memory translation checksum testoccurred.Reload
translations
failed.from tape per the procedure in
Administration Manual. If the
problempersists,
check or
replace CPU/Memory CP.