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DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-1278TBRI-BD (TN2185 ISDN Trunk-Side BRI)
10
j. Error Type (2305, 3330): A critical failure in the Circuit Pack’s Packet Bus
interface. Possible causes include either a Packet Bus fault or an
on-board fault, for example, the board received a bad CRC or invalid
DLCI. If the Packet Bus is alarmed, refer to the “
Maintenance Manual
”
section for Packet Bus fault location and recommended repair
procedures. The number of ISDN circuit packs displaying this error
increases the probability of errors due to Packet Bus problems.
If there are no Packet Bus alarms, reset the circuit pack with the busyout
board PCSS and reset board PCSS commands. If the Circuit Pack
Restart Test (#594) passes, then the on-board circuitry is healthy. Retire
the alarm with the test board PCSS long clear command. If the Circuit
Pack Restart Test (#594) fails, replace the circuit pack.
k. The SPE software detects an excessive number of up-link messages from
the TN2185 board within a certain time period. To prevent the faulty board
from flooding the switch with data, the switch software takes the board out
of service and alarms it. The switch software also tells the Archangel to
ignore up-link messages from the board.
When the board is alarmed due to this error, the switch software
periodically puts the board back in service and tells the Archangel to
process up-link messages from the board. If the problem still exists, the
software takes the circuit pack out of service again. If the circuit pack
does not exhibit the problem for a certain time period, then maintenance
software resolves the alarm and the circuit pack is left in service.
l. The circuit pack received an inconsistent down-link message (a bad
header, port number, data, subqualifier, or logical link) over the Control
Channel.
m. The board is receiving data from the bus faster than it can distribute the
data to its endpoints, causing the FIFO RAM buffer to overflow. This error
can occur occasionally due to the statistical sizing of the buffers. If it
1794 Packet Bus transmit buffers overflow.
1795 Circuit pack cannot find end of frame when transmitting to
Packet Bus. Clear the alarm with: busyout board PCSS,
reset board PCSS, test board PCSS long clear, release
board PCSS. If the error recurs within 10 minutes, replace
the circuit pack.
2306 Error in a received frame from the Packet Bus, most likely
caused by a packet bus problem, but may be due to a
circuit pack fault. An invalid Link Access Procedure Data
(LAPD) frame error occurs if the frame contains a bad
Cyclical Redundancy Check (CRC). If bus parity errors
occur, run the LAN Receive Parity Error Counter Test (#595)
to determine if the condition has cleared. Refer to the
maintenance documentation to determine if the problem is
isolated to this circuit pack or is caused by Packet Bus
faults.