ADC Telecommunications Inc. DVLRCS800 Manuale Utente
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
Page 5-13
©
2002, ADC Telecommunications, Inc.
11. Remove
the dust caps from the optical fiber connectors.
12. Clean
each connector (follow connector supplier’s recommendations) and then insert each
connector
into the appropriate optical port.
13. When
ready to put the unit back into service, place the On/Off switch in the ON position
(press
I).
14. Notify
the NOC or alarm monitoring service that the system is going back online.
4.2.2
PORT 3 Loopback Test
1. Put
on the IR filtering safety glasses.
2. Notify
the NOC or alarm monitoring system operator that the system is going offline.
3. At
the HU or STM (whichever unit is being tested), place the On/Off switch in the OFF
position
(press O).
4. Disconnect
the optical fiber connectors from the PORT 1 and PORT 3 optical ports and
place
a dust cap over each connector.
5. Plug
a 15 dB in-line optical attenuator into the PORT 3 optical port.
6. Connect
a patch cord between the optical attenuator and the PORT 1 optical port.
7. Place
the On/Off switch in the ON position (press I) and observe the PORT 3 LED
indicator.
8. The
PORT 3 LED indicator will turn either red or green. If the LED turns yellow, the
secondary
optical transmitter or receiver is faulty. Replace the unit and then recheck
system
operation. If the LED turns green, the optical ports are good.
9. Place
the On/Off switch in the OFF position (press O).
10. Remove
the optical attenuator from the PORT 3 optical port.
11. Remove
the dust caps from the optical fiber connectors.
12. Clean
each connector (follow connector supplier’s recommendations) and then insert each
connector
into the appropriate optical port.
13. When
ready to put the unit back into service, place the On/Off switch in the ON position
(press
I).
14. Notify
the NOC or alarm monitoring service that the system is going back online.
5
MAINTENANCE PROCEDURES
This
section specifies the system maintenance requirements and provides the procedures for the
required
maintenance tasks. Refer to these procedures as needed when specified in the
Scheduled
Maintenance table.