CANOGA PERKINS L351 10/100BASE Media Converter - Manual (Page 65)

EdgeAccess Universal Chassis System
Chapter 5
Maintenance and Troubleshooting
5.1 General Maintenance
Well-maintained components and clearly identified cables help assure optimum system operation.
Damaged fiber cables and dirty connectors are a common source of signal loss or attenuation. Single
mode and multimode fiber optics are especially sensitive to contamination. Inspect, clean, and test all
components to maintain optimum performance.
Note: To avoid damage and signal loss, do not over-tighten or force-fit optical connectors.
• To clean the ferrules and end-face surfaces of male fiber couplings, use a lint-free pad saturated
with isopropyl alcohol.
• To clean the female fiber connectors, use canned air.
• To prevent damage and contamination, place protective dust caps on all unused optical
connectors.
5.1.1 Manage Cable Links
Plan to manage the cables to ensure trouble-free operation and maintenance tasks.
• Position and secure the fiber optic cables to prevent excessive bends and damage. Follow the
guidelines for the bend radius for specific fiber cables.
Note: If no minimum bend radius is specified, the typical long-term, low-stress radius is not less
than 15 times the cable diameter (based on Federal Standard FS-1037C).
• Always connect the fiber optic cables in the standard Tx to Rx and Rx to Tx scheme.
• Label each cable near each end with the signal direction, source, and destination to minimize
connection errors.
5.1.2 Check Optical Power Levels
To ensure the proper performance levels, measure the fiber link loss, or link attenuation, for all fiber
links. Each L351 is shipped with a document that lists the output power for each laser transmitter.
To determine link attenuation, use either the L351 Tx source or a hand-held 1310/1550 nm laser
source, a fiber optic test jumper cable (with known loss), and an optical power meter.
Note: For accurate results, warm up each unit for at least 30 minutes before checking power levels.
The transmission laser in the L351 turns on automatically when the chassis receives power.
L351 10/100BASE Media Converter 5-1