DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-1153PDATA-PT (Packet Data Line Port)
9
c. These three counters are incremented for errors which may or may not b e
caused by the PDATA port itself. For example, the Invalid LAPD Frame
counter (error type 513) could exceed threshold due to a large number of
"bad CRC" errors. The errors could be caused by packets arriving from the
"other end" which have a bad CRC, in which case the PDATA port is
behaving prope rly and should not be alarmed . On the other hand, the
error could be ca used by faulty CRC-checking hardware on the PDATA
board, in which c ase the PDATA board should b e alarmed.
Since these error counters do not necess arily indicate problems with the
PDATA port itself, no alarms are raised when the counters exceed
threshold. Instead, testing esc alates to the LAPD Connectivity Test. If the
LAPD Connectivity test fails repeatedly, then the PDATA port is the source
of the problem and will be alarmed. More exhaustive tests can be run with
the reset board UUCSS command.
d. This error occurs if the switch has troub le in writing the translation data into
memory. A MINOR alarm is raised if this error occ urs. This alarm indicates
the failure of either the Angel hardware or the RAM on the board . If the
Angel is the cause of the failure, simila r alarms should be raised ag ainst
all other ports on the board. If the RAM is the cause of the failure, then only
the port is affected-other p orts may function normally.
No associated test can retire this alar m. The repair procedure for this
alarm is as follows. First, reset the circuit pac k (i.e. use
busyout board
UUCSS
and
reset board UUCSS
commands). If the circ uit pack comes
back into service after the reset (the red LED on the circuit pack is off),
then execute the
test port UUCSSpp long clear
command to clear the
alarm. If the PDATA circuit pack fails to reset properly (i.e. the red LED on
the circuit pac k is on.), replace the circuit p ack.
Notice that the correspond ing Translation RAM test always passes
because it issues a translation write c ommand but does not wait around
for the failure up-link message from the b oard.
e. This error occurs when the receive FIFO RAM buffers on a circuit p ack
overflow, i.e., the circuit pack rec eives data from the bus faster than it can
distribute the data to i ts endpoints. If this error occ urs frequently, however,
it may indicate a LAPD parameter mismatc h. LAPD should be able to
recover from this problem, bu t it may degrade the p erformance of the
Packet Bus. No alarm is raised for this error.
f. This error occurs if the PDATA P ort Local Loop-Around test fails. If this test
fails, a MINOR alarm is raised. This alarm indicates th e failure of the UART
device on the port. The c ircuit pack should b e replaced if this alarm
cannot be cleared . See the repair procedure for PDATA Port Local
Loop-Around Test (#602) for more details.
g. This error occurs if the System Port Connectivity Test (#603) fails or if the
System Port connection fails in the call set-up procedure. This error is only
applicable to ports used as a System Port. If this test fails repeated ly, a
MINOR alarm is raised.