An analog signal is in the form of a wave that uses continuous...
Bandwidth is the information carrying capacity of a system.
The bit is the basic unit of digital data
What does ECTFE stand for:
What does AWG stand for:
Lasers have a high modulation frequency and can support data rates in...
When timing digital signals, what transmission type is performed by...
What term describes the transmission of a signal in only one...
The maximum transmission of electrical power occurs when a...
Balance twisted-pair cables are commonly used for data...
What term describes the transmission of signals in either direction...
WDM uses a series of lenses to refract and direct light pulses into a...
When selecting cable shields, the overall cable size limitations also...
Especially important in aerospace or computer applications, alloys...
EM waves are attenuated and reflected by a shield.
Attenuation of balance twisted pair cables increases at higher cable...
What are the two types of attenuators
The series resistance R(line) is expressed in:
A low dissipation factor is preferred
Light travels at what speed?
A telecommunications transmission system consists of what three basic...
DS-1C systems are no longer being deployed.
A high dielectric strength is preferred
A shield is a metallic covering or envelope enclosing an (a):
PVC-insulated conductors were commonly referred to as inside plant and...
A simple model of a telecommunications system has what three parts?
Which of the following are not common electrical conductors?
The series inductance L(line) is expressed in:
Delay skew is the difference in propogation delay between any pairs...
What describes the rate at which a signal can change state
A digital signal changes from one state to another in discrete steps?
A higher attenuation number is better
Which type of cabling insulation is used outside:
Insulation is also known as dielectric
Which digital timing method is less efficient because it requires the...
What causes a light pulse to broaden in duration as it travels through...
For power over ethernet, power may be delivered on the two unused...
What is the maximum source power output level for power over ethernet
What is the frequency range for VLF audio:
If a shield is not properly grounded, its effectiveness will not be...
Which of the following are types of shields
The ratio of the capacitance of an isulated conductor to the...
The mutual capacitance C(line) is expresssed in
If the signal power has a power ratio of 100, how many dB increase...
One baud is equal to how many state changes per second.
Transmitters have bandwidth limitations because they take time to...
When a signal encounters a discontinuity in the medium carry the...
When timing digital signals which transmission type occurs without a...
The measure of the maximum voltage that an insulation can withstand...
Human beings can hear what frequency range?
What is the most fundamental example of an analog signal.
The relative power loss in the insulation due to molecular excitement...
The size in the AWG system represents the number of steps that were...
What devices convert speech to digital data, and its subsequent...
Phase is a description of the reference:
What is the smallest size conductor:
Typical characteristics of single mode optical fiber are:
Mutual inductance is a measure of:
One of the most common techniques used to maximize the number of...
Good internet performance requires a down-to-upstream ratio of at...
When converting analog signals to a digital signal the sampling rate...
What is the rating for oxidation resistance for aluminum.
What is the largest size conductor:
For optical fiber the maximum splice loss of __________ dB is...
Voice telephone circuits are generally limited to what range?
What is the best possible shield?
When converting analog signals to digital, if you have a frequency of...
ATM (STS-3) and OC3 use what encoding rate?
A doubling of a signals power will result in an increase of how many...
What is the frequency range for UHF:
To achieve ethernet (100BASE-T4) rates of 100 Mb/s for 100 m (328...
Tight twisting of conductors is used where?
Which type of conductor sets the standard for comparing conductivity...
The process of reconstituting the individual channels from the...
To achieve a DS1 rate of 1.544 Mb/s for 1500 m (4920 ft) on ...
What are the main reason for twisting pairs of conductors?
Capacitance unbalance is a measure of what:
Analog signals can be converted into digital signals by a multistep...
What is the numerical aperture of 62.5/125 fiber
What is the rate for ATM (STS-3)
In telephony, delays greater than _____ are perceptible if they are of...
EM fields are usually expressed in:
Crosstalk is signal interference between cable pairs, which may be...
Mutual conductance G(line) is expressed in
Both mutual inductance and capacitance unbalance are affected by?
A pulse code modulation is a sampled value that is assigned one of...
In June 2003 the IEEE approved what standard that deals with...
The process of converting an analog signal to an equivalent sequence...
Select the correct statements for shield effectiveness ratings.
What speed do signals travel in a cable
Transmission circuits are generally classified as?
What are the two types of loading coils
For optical fiber the maximum connection loss of ______ dB is...
Stranded conductors generally have a slightly smaller outside diameter...
What is the Interface Between Data Terminal Equipment and Data...
Select the data rate and number of channels available with a DS-1
The maximum cable attenuation coefficient singlemode inside plant...
ATM (STS-1) and OC1 have what encoding rate?
Since speech does not use much bandwidth, it can tolerate delays...
Shields are made of what?
Insulation (also called dielectric) is used to isolate the flow of...
The bandwidth of a multimode system is a function of:
What is the rate for ATM (STS-1)
When calculating the "repair margin" as part of the power...
Data networks must have __________ capabilities to support IP...
Surface transfer impedence is usually measured in what?
...
What are the advantages of solid conductors?
Wavelength areas that are most suitable for optical communications are...
What is the center wavelength for a CD laser
Drain wires are usually?
Name 2 cable insulations which improved the smoke and flame...
Similar in nature to digital heirarchy for balanced twisted-pair...
For singlemode optical fiber cable, the following maximum attenuation...
The maximum cable attenuation coefficient for 62.5/125 um multimode...
Consider the following primary criteria when selecting a cable shield...
The outer most part of a fiber is called the cladding
Attenuation to Crosstalk ratio (ACR) is calculated how:
For power over ethernet, what pins are used to deliver power, select...
In the case of speech signals, it is desirable to assign a greater...
A sinusoid is an oscillating,periodic signal that is described by what...
What is the corrosion resistance of high-strenght alloys?
Visible light wavelength is:
The common distance between D loading points is:
The maximum cable attenuation coefficient singlemode outside...
Multimode optical fiber is best suited for premise applications where...
Primary rate ISDN has an encoding rate of?
Although satelitte signals travel at a velocity of the speed of light...
Devices that convert electrical energy back into sound energy are...
Multiple-layer braid shield effectiveness for radio frequency is:
When calculating the power penalties for the link loss budget, what is...
The maximum cable attenuation coefficient for 50/125 um multimode...
High temperatures can be routinely encountered in?
The rate at which the digital signal state changes and the bit...
Two key parameters in optical fiber cabling performance that must be...
Select the data rate and number of voice channels for STS-3/OC-3
Select the data rate and number of channels available with a E2...
Foils shield effectiveness for audio frequencies is:
The two common methods of encoding are?
Select the data rate and number of channels available with a E1...
What is the numerical aperture of 50/125 fiber:
What is the frequency range for LF audio:
Identify this signal
There is a direct relationship between insulation resistance and cable...
The loosening of static pressure connectors due to widely varying...
Basic rate ISDN uses what transmission method?
Select the data rate and number of channels available with a DS-2
In voice band applications, what is a typical impedence and where is...
Loss variations due to temperature changes can sometimes be as high as
Conductive nonmetallic materials are sometimes used at power and some...
Baluns are used to adapt the unbalanced impedence of twisted-pair to...
The delay skew between the fastest and slowest pairs in a category...
NEXT loss is dominated by components in the near zone, what is defined...
The common distance between H loading coils is:
What are 3 practical power source options for VoIP?
When converting digital data to digital signals, what are the two...
A high dielectric constant is preferred
Select the true statements about Primary rate ISDN North America:
Select the data rate and number of channels available with a DS-4
The effectiveness of single-layer and multiple-layer braids against...
Select the true statements about pair twists:
Basic rate ISDN has an encoding rate of?
The ANSI/TIA/EIA-232-F standard limits the transmission distance to...
Select the data rate and number of channels available with a DS-1C
A temperature coefficient of _________ per degree Celsius is not...
Select the true statements about basic rate ISDN:
Select the true statements about Primary rate ISDN Europe:
The key factors in determining which optical fiber to use in a given...
Select the data rate and number of channels available with a DS-3
The key performance drivers for balanced twisted-pair channels are:
Primary rate ISDN uses what transmission method?
Select the true statements about HDSL:
Select the data rate and number of voice channels for STS-1/OC-1
The signal propogation speed in twisted-pair will depend on what...