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 be
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 properly and should not be alarmed. On the other hand, the
error could be caused by faulty CRC-checking hardware on the PDATA
board, in which case the PDATA board should be alarmed.
Since these error counters do not necessarily indicate problems with the
PDATA port itself, no alarms are raised when the counters exceed
threshold. Instead, testing escalates 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 trouble in writing the translation data into
memory. A MINOR alarm is raised if this error occurs. 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, similar alarms should be raised against
all other ports on the board. If the RAM is the cause of the failure, then only
the port is affected-other ports may function normally.
No associated test can retire this alarm. The repair procedure for this
alarm is as follows. First, reset the circuit pack (i.e. use
busyout board
UUCSS
and
reset board UUCSS
commands). If the circuit 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 pack is on.), replace the circuit pack.
Notice that the corresponding Translation RAM test always passes
because it issues a translation write command but does not wait around
for the failure up-link message from the board.
e. This error occurs when the receive FIFO RAM buffers on a circuit pack
overflow, i.e., the circuit pack receives data from the bus faster than it can
distribute the data to its endpoints. If this error occurs frequently, however,
it may indicate a LAPD parameter mismatch. LAPD should be able to
recover from this problem, but it may degrade the performance of the
Packet Bus. No alarm is raised for this error.
f. This error occurs if the PDATA Port Local Loop-Around test fails. If this test
fails, a MINOR alarm is raised. This alarm indicates the failure of the UART
device on the port. The circuit pack should be 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 repeatedly, a
MINOR alarm is raised.
