DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-1670TBRI-BD (TN2185 ISDN Trunk-Side BRI)
9
j. Error Type (2305, 3330): A critical failure in the Circuit Pack’s Packet Bus
interface. Possible causes inc lude either a Packet Bus fault or an
on-board fault, for example, the b oard received a b ad CRC or invalid
DLCI. If the Packet Bus is alarmed, refer to the “
Maintenance Manual
”
section for Packet Bus fault location and recommended rep air
procedures. The number of ISDN circ uit packs disp laying this error
increases the probab ility of errors due to Packet Bus prob lems.
If there are no Packet Bus alarms, reset the circuit pac k with the busyout
board UUCSS and reset board UUCSS command s. If the Circuit Pack
Restart Test (#594) passes, then the on-board circuitry is h ealthy. Retire
the alarm with the test board UUCSS long clear command. If the Circuit
Pack Restart Test (#594) fails, replace the circuit pac k.
k. The SPE sof tware d etec ts an exce ssive numb er of up -lin k mess ages from
the TN2185 board within a certain time p eriod. To prevent the faulty board
from flooding the switch with data, the switch software takes the b oard out
of service and alarms it. The switch sof tware also tells the Archangel to
ignore up-link messages from the board.
When the board is alarmed d ue 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 pac k out of service again. If the c ircuit pack
does not exhibit the prob lem for a certain time period , then maintenance
software resolves the alarm and the circ uit pack is left in servic e.
l. The circuit pack received an inconsistent down-link message (a bad
header, port number, d ata, subqualifier, or log ical link) over the Control
Channel.
m. The board is receiving data from the bus fa ster than it can distribute the
data to its endpoints, c ausing the FIFO RAM buffer to overflow. This error
can occur oc casionally due to the statistic al sizing of the buffers. If it
1794 Packet Bus transmit buffers overflow.
1795 Circuit pack c annot find end of frame when transmitting to
Packet Bus. Clear the alarm with: busyout board UUCSS,
reset board UUCSS, test board UUCSS long clear,
release board UUCSS. If the error recurs within 10 minutes,
replace the circ uit 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 pac k fault. An invalid Link Acc ess Procedure Data
(LAPD) frame error occurs if the frame contai ns 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 ha s cleared. Refer to the
maintenance documentatio n to determine if the problem is
isolated to this circuit p ack or is caused b y Packet Bus
faults.