2.4-2.5 Flashcards by Raymond Sylverne

A 66 block is a

punch down block used to connect individual copper wires together. Primarily for telephone applications.

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110 blocks are used primarily for

telephone applications in high-speed networks because the introduce less crosstalk.

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Patch panel is a mounted hardware assembly that…

contains ports used to connect and manage incoming and outgoing LAN cables.

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T568A Pinout Order

Pin 1: GW = White with green stripe

Pin 2: G = Green Pin

3: OW = White with orange stripe

Pin 4: B = Blue Pin

5: BW = White with blue stripe Pin
6: O = Orange

Pin 7: BrW = White with brown stripe

Pin 8: Br = Brown

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fiber distribution panel

A patch panel for fiber optic cabling is called a

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The smart jack is a way for your (WAN) provider to perform

some additional troubleshooting functions without having to visit your location.

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T568B Pinout Order

Pin 1: OW = White with orange stripe

Pin 2: O = Orange

Pin 3: GW = White with green stripe

Pin 4: B = Blue

Pin 5: BW = White with blue stripe

Pin 6: G = Green

Pin 7: BrW = White with brown stripe

Pin 8: Br = Brown

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What are some functions that Smart Jacks Allow (WAN) Providers to perform? (2)

Set up a loopback
Provide diagnostics remotely

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T568A

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When organizing an MDF or IDF make sure to record names in

tables and diagrams.

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T568B

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When organizing an MDF or IDF develop a naming convention and use it to label (5)

Cables
Racks
Wall jacks
Patch panel ports
Network devices

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When organizing an MDF or IDF document these four facts about the cable details attached: (4)

LIL G

Location
Installation dates
Lengths
Grade (Cable Grade)

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When organizing an MDF or IDF Consider using

cable management software

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A crimping tool is used to attach connectors to wires. Some are designed for power connections.

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Punch down tool

Forces wire into a wiring block

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Optical Time Domain Reflectometer (TDR / OTDR) (4)

Performs the same function as a TDR, but is used for fiber optic cables.

Measures signal loss
Creates wire maps.
Estimates fiber lengths
Determines light reflection

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How do OTDR’s work

sends light pulses into the fiber cable and measures the light that is scattered or reflected back to the device.

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A multimeter tests (3)

AC/DC voltages
Continuity
Wire mapping

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A Tone Probe/Generator can be used to

trace and identify cables or wires within a group by sending an analog sound through the wire

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A cable tester (3) main functions

Can identify Missing pins
Can identify Crossed wires
Verifies that the cable can carry a signal from one end to the other

****Not generally used for frequency testing

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cable tester can be used to quickly tell the difference between

a crossover and a straight-through cable..

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A Loopback adapter (lookback plug) (2)

Used to verify that a device can both send and receive signals.
reflects a signal from the transmit port on a device to the receive port on the same device.

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A spectrum analyzer

measures the magnitude of an input signal versus frequency

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Bandwidth Speed tester

an online tool that is used to test the bandwidth of your internet connection

Attenuation

is the loss of signal strength from one end of a cable to the other. This is also known as dB loss.

Attenuation TroubleShooting: (3)

* never to exceed the maximum cable length * Cables at a higher temperature experience more attenuation * A repeater regenerates the signal and removes the effects of attenuation

A Crosstalk\*\*\*

is interference that is caused by signals within the twisted pairs of wires

Cross Talk TroubleShooting (3)

* Create more twist * Twist wires at a different rate * Keep wires from being damaged

EMI TroubleShooting: (3)

* Use fiber optic instead of copper cables. * Use shielded twisted pair cables instead of Un-Shielded * Avoid installing cables near EMI/RFI sources. * (generators, motors (such as elevator motors), radio transmitters, welders, transformers, and fluorescent lighting.)

Incorrect Pin-Out (Bad Ethernet Cable Setup)

- Use a cable tester to make sure the cables are properly wired - Start off with a known good Cable

Electrical Shorts occur can be caused (2)

* worn wire jackets * metal object piercing two or more wires.

An open circuit

is when a cut in the wire prevents the original signal from reaching the end of the wire.

Transceiver mismatch when connecting one network device to another

matching transceivers must be used. -For twisted pair cabling, a mismatch in speed is a common issue.

TX/RX reverse

Transmit and the Receiver pairs of a cable are inversed

Reflection

A measurable amount of light is reflected when it hits the ends of the cable. Fiber Cable Length/Damage

Refraction

If the light hits the boundary between the core and the cladding at too steep of an angle, the light is refracted into the cladding instead of reflected back into the core, causing signal loss

Absorption

Impurities in the fiber can also absorb the light, converting it to another form of energy, like heat. This is a major cause of signal loss.

# r punch down block used to connect individual copper wires together. Primarily for telephone applications.

A 66 block is a

# r telephone applications in high-speed networks because the introduce less crosstalk.

110 blocks

# r contains ports used to connect and manage incoming and outgoing LAN cables.

Patch panel is a mounted hardware assembly that...

# r A patch panel for fiber optic cabling is called a

fiber distribution panel

# r T568A

# r T568B

# r demarcation point between the carrier's local loop and the customer's premises wiring.

In telecommunications, a network interface device (NID; also known by several other names) serves as the

# r perform some additional functions without having to visit your location.

The smart jack is a way for your wide area network (WAN) provider to

# r - Set up a loopback and provide diagnostics - Send alarm and reconfiguration info to the (WAN) Provider so they can make changes remotley

What are some functions that Smart Jacks Allow (WAN) Providers to perform? rs

# r Pinout Order Pin 1: OW = White with orange stripe Pin 2: O = Orange Pin 3: GW = White with green stripe Pin 4: B = Blue Pin 5: BW = White with blue stripe Pin 6: G = Green Pin 7: BrW = White with brown stripe Pin 8: Br = Brown

T568B

# r Pin 1: GW = White with green stripe Pin 2: G = Green Pin 3: OW = White with orange stripe Pin 4: B = Blue Pin 5: BW = White with blue stripe Pin 6: O = Orange Pin 7: BrW = White with brown stripe Pin 8: Br = Brown

T568A

# r telephone company's responsibility for maintenance ends and the consumer's responsibility begins.

demarcation point defines where the

# r cables, wall jacks, patch panel ports, network devices, and racks.

When organizing an MDF or IDF develop a naming convention and use it to label

# r - Location - Installation dates - Cable lengths - Cable grades

When organizing an MDF or IDF document these four facts about the cable details attached:

# r cable plant documentation or cable management software

When organizing an MDF or IDF Consider using

# r A crimping tool is used to attach connectors to wires. Some are designed for power connections.

# r Forces wire into a wiring block Trims the wires and breaks the insulation

Punch down tool (2)

# r * Estimate fiber lengths * Measure signal loss, * determine light reflection, * Create wire maps. Performs the same function as a TDR, but is used for fiber optic cables.

Optical Time Domain Reflectometer (TDR / OTDR)

# r sends light pulses into the fiber cable and measures the light that is scattered or reflected back to the device.

How do OTDR's work

# r AC/DC voltages levels Continuity, wire mapping

A multimeter tests

# r a device for testing average power in fiber optic systems.

An optical power meter (OPM)/ Light Meter

# r trace and identify cables or wires within a group by sending an analog sound through the wire

A Tone Probe/Generator

# r - Can identify missing pins or crossed wires - Not generally used for frequency testing - Verifies that the cable can carry a signal from one end to the other

A cable tester

# r quickly tell the difference between a crossover and a straight-through cable..

cable tester can be used to

# r reflects a signal from the transmit port on a device to the receive port on the same device. Used to verify that a device can both send and receive signals.

A Loopback adapter (lookback plug) (2)

# r measures the magnitude of an input signal versus frequency within the full frequency range of the instrument.

A spectrum analyzer

# r an online tool that is used to test the bandwidth of your internet connection. There are countless speed test websites available, all of which provide essentially the same information:

Bandwidth Speed tester

# r is the loss of signal strength from one end of a cable to the other. This is also known as dB loss.

Attenuation

# r is interference that is caused by signals within the twisted pairs of wires (for example, current flow on one twisted pair causing a current flow on an adjacent pair).

A Crosstalk\*\*\*

# r * never to exceed the maximum cable length * Cables at a higher temperature experience more attenuation * A repeater regenerates the signal and removes the effects of attenuation

Attenuation TroubleShooting: (3)

# r * Twisting of wires into pairs helps reduce crosstalk * Each pair of wires is twisted at a different rate to reduce crosstalk between pairs. * Crosstalk occurs, when wires are crushed or where the plastic coating is worn.

Cross Talk TroubleShooting (3)

# r * Use fiber optic instead of copper cables. * Use shielded twisted pair cables instead of Un-Shielded * Avoid installing cables near EMI/RFI sources. * (generators, motors (such as elevator motors), radio transmitters, welders, transformers, and fluorescent lighting.)

EMI TroubleShooting: (3)

# r - Use a cable tester to make sure the cables are properly wired - Start off with a known good Cable

Incorrect Pin-Out (Bad Ethernet Cable Setup)

# r * worn wire jackets, * metal object piercing two or more wires.

Electrical Shorts occur can be caused (2)

# r is when a cut in the wire prevents the original signal from reaching the end of the wire.

An open circuit

# r One particular type of cabling issue is the one in which the Transmit and the Receiver pairs of a cable are inversed

TX/RX reverse

# r A measurable amount of light is reflected when it hits the ends of the cable. Fiber Cable Length/Damage

Reflection

# r If the light hits the boundary between the core and the cladding at too steep of an angle, the light is refracted into the cladding instead of reflected back into the core, causing signal loss

Refraction

# r Impurities in the fiber can also absorb the light, converting it to another form of energy, like heat. This is a major cause of signal loss.

Absorption

2.4-2.5 Flashcards

(77 cards)