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Operation and Maintenance Manual

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MultiHaul™ Installation, Operation and Maintenance Manual
Page 86
5 Diagnostics
The MultiHaul™ system’s highly reliable and easy-to-use radio link features a wide range
of built-in indicators and diagnostic tools designed to enable you to quickly evaluate a
link’s performance, identify operating faults, and resolve them.
The general diagnostics process for a MultiHaul™ link is to identify whether there is a
problem that needs to be addressed, to isolate the root cause of the problem, and to
implement the steps that are required to solve the problem.
The following is a partial list of events that can cause system problems:
• End equipment problems (such as connection or device configuration issues)
• External hardware faults
• System level configuration issues
• Hardware faults that require radio link replacement
This chapter describes the MultiHaul™ diagnostics features and offers basic instructions
for how to use these features to isolate and resolve operating faults in the ODUs or in
the MultiHaul™ network. The chapter includes the following topics:
• Troubleshooting Process
• Alarms
• Loopbacks
• Performance Statistics
5.1 General Troubleshooting Process
Follow this step-by-step process whenever you encounter a problem with the link.
Step 1: Define the Problem
Isolating a problem’s symptoms is the first step in corrective maintenance. It is
important to define the problem clearly and fully.
Define the problem as either a customer-impact type (for example, loss of element
management, or no Ethernet services over the link) or a product-related type (for
example, a link is down or an ODU does not power up).
Step 2: Check and Gather Relevant Information
Examining the link’s status indications will provide both current and historical
information regarding the link’s performance and alarms.
Indications include ODU LEDs, System Alarms, and System Statistics.
Use these indications to further refine the problem and help to assess possible causes,
both physical and logical, in the MultiHaul™ system.