Procedure 14-6: Connect OLIU optical loopbacks
Overview
Use this procedure to loop back an out-of-service optical line at the OLIU faceplate connectors. Optical lines can also be looped back at the LGX equipment to verify correct fiber installation and labeling.
Important!
LBOs are installed on the OLIU faceplate IN connector only.
Required equipment
In addition to the equipment listed in Required equipment, one lightguide jumper (MS1A40LC-A40LC-2, Comcode 108918269) for each optical line to be looped back (LC-type connections) is also required.
The following lightguide buildouts (LBOs) are required.
Before you begin
Prior to performing this procedure:
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Refer to Laser safety and Electrostatic discharge in Chapter 1, Safety.
Steps
Complete the following steps to loop back an out-of-service optical line at the OLIU faceplate connectors.
1 |
Obtain the correct LBO and lightguide jumper:
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2 |
If required, remove the optical line connections from the OLIU faceplate. Make a record of these disconnections so they can be replaced. | ||||||||||||||
3 |
Remove the LBO (if equipped) from the IN connector of the OLIU faceplate. Make a note of the value. Reference: Procedure 14-5: Install/remove LC lightguide buildouts (LBOs) | ||||||||||||||
4 |
Remove the protector caps from the ends of the lightguide jumper (loopback cable). | ||||||||||||||
5 |
Signal performance may be degraded if the connectors/adapters and fiber are not cleaned. Ensure all optical fiber connectors/adapters and fiber are properly cleaned. Clean the fiber connectors/adapters and fiber. Reference: Procedure 14-3: Clean optical fibers, dual LC adapters and LC lightguide buildouts (LBOs) | ||||||||||||||
6 |
Important! Pluggable transmission modules are shipped with a dust cover installed into the optical ports to maintain cleanliness during storage and/or transportation. It is recommended that the dust cover be kept in place to maintain cleanliness until the optical fiber is connected. With proper care and handling, cleaning the pluggable transmission modules should not be necessary. If required, clean the pluggable transmission module(s). Reference: Procedure 14-28: Clean optical pluggable transmission module | ||||||||||||||
7 |
If required, remove the protective dust cover from the pluggable transmission module. Keep the dust cover clean until reinstalled later, if required. | ||||||||||||||
8 |
Install the appropriate LBO on the IN connector, if required. The list of circuit packs and their corresponding LBOs may be found in Step 1. Reference: Procedure 14-5: Install/remove LC lightguide buildouts (LBOs) | ||||||||||||||
9 |
Important! The LBOs and lightguide jumpers connect to the LC-shielded, angled adapter on the OLIU faceplate. Using the lightguide angled boot jumper (MS1A40LC-A40LC-2, Comcode 108918269), connect the IN connector and the corresponding OUT connector on the same OLIU. Result: After a short time, the OLIU FAULT LED or port LED associated with the pluggable transmission module stops flashing. (It may take from 15 seconds to 3.5 minutes for the LED to stop flashing after the cables are connected, depending on the setting of the OC-n signal degrade threshold.) The ACTIVE LED remains on. If OSI over DCC is enabled for the port, the MJ and NE LEDs on the SYSCTL circuit pack do not extinguish and the following alarms are reported. | ||||||||||||||
10 |
If responses are not as indicated, check connections and the lightguide jumper. Clean connections and repeat Step 9. If responses are still not correct, click the Alarm List button to obtain the NE Alarm List. Refer to the Alcatel-Lucent 1665 Data Multiplexer Extend (DMXtend) Alarm Messages and Trouble Clearing Guide, 365-372-326 to clear/isolate the trouble. Reference:
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11 |
If required, repeat Step 1 through Step 10 to loop back additional optical lines. End of steps | ||||||||||||||
