CCNA 1 v3.1 Module 4Cable Testing

Purpose of This PowerPoint

This PowerPoint primarily consists of the Target Indicators (TIs) of this module in CCNA version 3.1.

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Objectives

Waves

Sine Waves and Square Waves

Sine Waves and Square Waves

Exponents and Logarithms

Decibels

Viewing Signals in Time and Frequency

Viewing Signals in Time and Frequency

Analog and Digital Signals in Time and Frequency

Fouries Synthesis

Noise in Time and Frequency

Ampere's Law states that any electrical current is surrounded by a magnetic field.

Sources of Noise

EMI [electromagnetic interference]

Interference by electromagnetic signals that can cause reduced data integrity and increased error rates on transmission channels.

RFI [radio frequency interference]

The radio frequencies that create noise that interferes with information being transmitted across unshielded copper cabling.

Nearby cables that carry data signals

Laser noise at the transmitter or receiver of an optical signal

White Noise

Noise that affects all transmission frequencies equally is called white noise

NarrowBand Noise

Noise that only affects small ranges of frequencies is called narrowband interference.

Bandwidth

Analog bandwidth typically refers to the frequency range of an analog electronic system. [Hz]

Digital bandwidth measures how much information can flow from one place to another in a given amount of time. [bps - bit per second]

Signaling over Copper and Fiber

Signaling over Copper and Fiber

Signaling over Copper and Fiber

Signaling over Copper and Fiber

Attenuation and Insertion Loss on Copper Media

Sources of Noise on Copper Media

Types of CrosstalkNear-end crosstalk (NEXT)

Types of Crosstalk

Far-end crosstalk (FEXT)

Types of Crosstalk Power sum near-end crosstalk (PSNEXT)

Cable Testing Standards

Cable Testing Standards

Cable Testing Standards

Crosstalk

Time-based Parameters

Testing Optical Fiber

Testing Optical Fiber

New Standard

On June 20, 2002, the Category 6 (or Cat 6) addition to the TIA-568 standard was published.

This new standard specifies the original set of performance parameters that need to be tested for Ethernet cabling as well as the passing scores for each of these tests.

A quality cable tester is the Fluke DSP-LIA013 Channel/Traffic Adapter for Cat5e.

Summary