110 connections can also be used at the other end of the network cable at the RJ-45 wall jack. In the network wiring closet, the 110 block is used to connect network cable to patch panels. However, there are specialized CAT5e certified 66 blocks available that do meet CAT5e termination standards. Although it was approved for Category 5 and greater, it is not really suitable for anything greater than 10BASE-T due to crosstalk problems. Block 66 was used primarily for voice communication. The 66 block has 50 rows of IDC contacts to accommodate 25-pair twisted-pair cable. Type 66 is an older design used to connect wiring for telephone systems and other low-speed network systems and is not as widely used as type 110. ![]() Two types of punchdown blocks used are type 66 and type 110. Optical cables are immune to electrical noise. Cable tester is typically used with copper cables. VOM, short for Volt/Ohm Meter is used with copper cables. Thus, an OTDR can detect light loss and pinpoint trouble areas, making repairs easy. It works by injecting a series of optical pulses into the fiber under test and extracting, from the same end of the fiber, light that is scattered or reflected back from points along the fiber. It is used as a troubleshooting device to find faults, splices, and bends in fiber optic cables by displaying the amplitude of the reflected light against time. OTDR, short for Optical Time Domain Reflectometer finds any problems like nicks in the optical cable. ![]() Which of the following should you do to rule out any problem at the physical layer?Īnswer: The problems are most likely to be found by using a loopback plug and an OTDR. However, you observed a significant number of dropped packets and errors on the circuit. You tested the cable from provider end up to the demark using internal loopback and found that the connectivity is present. Question: A telecommunications provider has just deployed a new OC-3 circuit at a customer site. The reflected light characteristics are analyzed to determine the location of any fiber optic breaks or splice losses. An OTDR injects a short, intense laser pulse into the optical fiber and measures the back-scatter and reflection of light as a function of time. OTDR: OTDR, short for Optical Time Domain Reflectometer can be used for testing a fiber optic cable network. Whether the driver is provided to support the operating system installed on the computer. Bus type on the Mother board of the computer, e.g. Connector type required to attach to the media, i.e. Type of network that it is going to be attached to, e.g. Network adapter: Following are required while selecting a network adapter.ġ. Cable crimper can be used to attach a connector to the end of a UTP cable. ![]() ![]() Wire stripper tool is designed to remove the sheathing from a cable to expose the inner wires and to make sure that a clean contact can be made.Ĩ. Wire snips are tools designed to cleanly cut the cable.ħ. Time Domain Reflectometer is used to locate cuts or breaks in a cable.Ħ. It allows circuits to be arranged neatly by plugging the cables in a pre-designed fashion.ĥ. A patch panel is used to connect incoming and outgoing lines of a LAN. A media tester is used to test a cable for connectivity, loss etc.Ĥ. A tone generator/tester is normally used to locate a cable physically by passing signals through a cable and sensing the signals along the cable using a sensitive receiver.ģ. A wire crimper is used to crimp the connectors with LAN cablesĢ. Network Troubleshooting and Tools 5.2 Given a scenario, use the appropriate tools for completing the jobġ.
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