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Table B-1 lists the basic tools and test equipment necessary to perform general maintenance and troubleshooting tasks on the Cisco 10000.
| Equipment | Description |
|---|---|
Number 2 Phillips and flat-head screwdrivers | Small and medium-sized. |
Voltage tester | Refer to the "Testing with Volt-Ohm Meters, Digital Multimeters, and Cable Testers" section. |
Optical fiber test equipment | Refer to the "Testing with Volt-Ohm Meters, Digital Multimeters, and Cable Testers" section. |
Cable testing equipment | Refer to the "Testing with Volt-Ohm Meters, Digital Multimeters, and Cable Testers" section. |
ESD-preventive wrist or ankle strap with connection cord | --- |
The following sections describe advanced testing equipment to aid in complex problem isolation.
Use a volt-ohm meter and a digital multimeter to measure parameters such as AC and DC voltage, current, resistance, capacitance, cable continuity. Use cable testers, also, to verify physical connectivity.
Use cable testers (scanners) to check physical connectivity. Cable testers are available for shielded twisted pair (STP), unshielded twisted pair (UTP), 10BaseT, and coaxial and twinax cables. A given cable tester might be able to perform any of the following functions:
Test fiber-optic cable both before installation (on-the-reel testing) and after installation. Continuity testing of the fiber requires either a visible light source or a reflectometer. Light sources capable of providing light at the three predominant wavelengths, 850 nanometers (nm), 1300 nm, and 1550 nm, are used with power meters that can measure the same wavelengths and test attenuation and return loss in the fiber.
This section describes time domain reflectometers (TDRs) and optical time domain reflectometers (OTDRs), which are typically used to detect cable defects.
Use time domain reflectometers to test for the following cable defects:
A TDR works by "bouncing" a signal off the end of the cable. Open circuits, short circuits and other problems reflect the signal back at different amplitudes, depending on the problem.
A TDR measures
Some TDRs can also calculate the propagation rate based on a configured cable length
Use optical time domain reflectometers to
An OTDR can be used to identify the "signature" of a particular installation, noting attenuation and splice losses. This baseline measurement can then be compared with future signatures if you suspect a problem in the system.
Use breakout boxes, fox boxes, and bit/block error rate testers (BERTs/BLERTs) to measure the digital signals present at
These devices can monitor data line conditions, analyze and trap data, and diagnose problems common to data communication systems. Traffic from data terminal equipment (DTE) through data communications equipment (DCE) can be examined to
These devices cannot test media signals such as Ethernet, Token Ring, or FDDI.
Use network monitors to
Network monitors do not decode the contents of frames. Monitors are useful for baselining, in which the activity on a network is sampled over a period of time to establish a normal performance profile, or baseline.
Monitors collect information such as packet sizes, the number of packets, error packets, overall usage of a connection, the number of hosts and their MAC addresses, and details about communications between hosts and other devices. This data can be used to
Use network analyzers (also called protocol analyzers) to decode protocol layers in a recorded frame and present the layers as readable abbreviations or summaries, detailing which layer is involved (physical, data link, and so forth) and the function each byte or byte content serves.
Most network analyzers can perform many of the following functions:
Posted: Fri May 12 10:47:19 PDT 2000
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