Specifications

GEMINI
2
Traffic Outstation Handbook
667/HB/32600/000 Page 127 Issue 11
Symptom
Possible Diagnosis
Action to Check Diagnosis
(b) Unit will not dial
Instation
Instation Number
incorrect.
Check the configured Instation telephone number is correct using CTN and
TNP (section 13.7 on page 239). If correct replace modem, if not reload the
unit’s configuration.
Unit in a retry sequence
Check the unit is in a retry sequence using RSC and RTR (section 13.7 on
page 239). If not replace modem.
PSTN line out of order
or disconnected
Check the line by disconnecting the unit from the line socket and inserting a
telephone handset. Try a voice call to and from the depot. If line OK, modem is
powered, and connections OK, then replace modem.
Telephone cable
disconnected
Check the PSTN connections to the modem and the Line connection socket. If
modem is powered, and connections OK, then replace modem.
Modem failed
Check if the modem’s ‘‘ON” LED is lit, if yes replace modem. If no check the
modem is switched on and voltage on the modem power cable (see section
5.2.2 on page 71). If no voltage present, replace the board providing the power
(normally the processor card).
Unit out of service
Check that the statuses of the LEDs on the Processor board are correct (see
section 7.3 which starts on page 118). If not power down and power up the
unit. If fault persists, replace the processor board.
Modem incompatible
with Instation modem
Check that OMCU and Instation are using compatibly configured modems.
Refer to section 8.4.4.
(c) Download failure
Wrong configuration for
the unit or faulty unit
Check unit can support facilities being configured. If not, load the corrected
configuration. If yes, replace the unit’s processor board and re-configure. If
fault still persists replace the unit.