NEC SV8500, Руководство по эксплуатации и обслуживанию, Страница: 650 / 975

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CHAPTER 5 Operation Procedure for System with PIR
3.1.7 Line fault - Dterm
[1] When using LC/ELC circuit card.
Note: If a circuit card is replaced because only one line is faulty, no other lines in that circuit card can be used
until the replacement is complete.
Note:
If any of the in-house cable wirings short-circuit, the POW ALM lamp on the ELC circuit card lights.
Remove the cause of the short-circuit and initialize the ELC circuit card.
(1) When OPE lamp on the ELC circuit card does not illuminate.
(a) Confirm that MB switch of the ELC circuit card is not in ON position (UP).
(b) Confirm that station data (ASDT command) in the ELC circuit card is assigned.
(c) Replace ELC circuit card with a spare.
(2) When BL lamp for each line is flashing or illuminating on the ELC circuit card.
(a) Confirm that MB switch of the ELC circuit card is not in ON position (UP).
(b) Use the MBST command to confirm that ELC circuit card has not been placed into make-busy state.
(c) Check the station data (ASDT command) assignment.
(d) Replace the ELC circuit card with a spare.
(3) Check the faulty line on the MDF.
(a) Isolate the faulty line to the in-house wiring side and to the system side.
(b) Connect the test Dterm to the system side.
(c) Confirm speech by station-to-station calling.
[When speech cannot be made]
• Check LT cables.
• Replace ELC circuit card with a spare.
[When speech can be made]
• Check to see if the modular plug is firmly connected with the Dterm.
• Check the wiring inside the rosette.
• Check the in-house wiring for any abnormality.
• Replace the Dterm with a spare.