Xerox WorkCentre Pro 423, Service Manual

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WorkCentre Pro 423/428 2-92 CHAPTER 2 TROUBLESHOOTING
03/02 Level 2 Troubleshooting
Display
value
(hex)
Reason Diagnostic information
(May be added)
Number
(decimal)
E5 Message mismatching call status Message type #101
E6 Recovery by timer expiration * Timer number #102
EF Other procedure error class - #111
FF Other interworking class - #127
Classification) #1-31: Normal event, #34-47: Resources not available, #49-63:Service not
available, #65-79: Service not provided, #81-95: Invalid message, #96-111: Procedure error,
#127: interworking
Supplementary Explanations about Reason Display Values
If G4 auto dialling fails to connect the remote terminal, the number may be redialled
automatically. Depending on the reason display value, the redial conditions differ as
follows:
1-1. Only if Reason #3 or #88 is returned after G4 auto dialling, the number is redialled
in G3 mode.
1-2. If Reason 6, 16 to 19, 27, 31, 34, 41, 44, 47, or 102 is returned, the number is
redialled in G4 mode.
1-3. If any other value is returned, the number is not redialled. Depending on the
setting, a transmission failure report may be ejected.
The reason display values indicate the D-channel status (origination, termination, or
disconnection. Reason 16 "normal disconnection" means that the D channel was
disconnected normally. This value is used in case of a B-channel error that occurs after
the remote party is connected.
…Example: If G3 communication through ISDN starts and a DCN signal is received from
the remote terminal, reason 16 is recorded at the DISC signal in ICM protocol monitor
data. In normal status, this reason display is not generated from the network.
#3 indicates that the network cannot connect the remote party despite a connection
request.
…Example: Despite G4 auto dialling, ISDN may not have the corresponding termination
number. The number is then redialled in G3 mode because the remote terminal is
probably not a G4 fax (number not existing on ISDN).
#18 indicates that no ALERT or CONN signal was returned within specified time in
response to a SETUP signal while #19 indicates that an ALERT signal was returned but
not a CONN signal. The ALERT signal indicates that the analogue terminal is now being
called. #19 is used only when the remote terminal is an analogue terminal.
#28 indicates that the switchboard cannot be connected to the remote terminal because
the remote number information is abnormal. For example, the termination number may
be short of digits or contain an abnormal value. If the number is dialled with a space or
dash (-) in the middle, the switchboard may return #28. #28 is also returned if the
number is redialled through a line with an additional service as explained in the manual
or prescribed in the procedure.
#88 indicates that the local terminal does not conform to the transmission capability, low
layer compatibility (LLC) or high layer compatibility (HLC) of the call side declared by a
SETUP signal.
#102 indicates that the Layer 3 timer has reached the prescribed time. The timer may be
on the network or terminal side.
…Example: T303 is a terminal timer. The timer starts when a SETUP signal is received
and stops when a CALLPROC, ALERT, CONN, or RELCOM signal is received. If none
of the signals is received from the remote terminal within four seconds, a DISC signal is
sent with reason #102.