test 1

What connector style is now specified in the latest 568 standard?

Any connector with a FOCIS document

Which reference method is required for TIA 568?

Any method as long as it is documented

Metro Politan networks can involve which of the following systems?

CTTV surveillance cameras Traffic monitoring Emergency services Educational systems

Which type of dispersion of affects singlemode fiber as well as multimode fiber?

Chromatic

Both mechanical splices and pre-polished splice connectors require a good ________ to have low loss

Cleve on the fiber being terminated

Cables with metallic conductors as well as fiber are called?

Composite Cables

Reference cables must match the ________ of the cables being tested.

Connector type

The difference between a fiber optic connector and a splice is ___________.

Connectors are demountable, while splices are permanent

Single mode transceivers use ____________ sources for their higher coupled power and band with.

DFB lasers

Cable plant lot should be estimated during the?

Design phase

Fiber optic network design involves ___________.

Determining the types of communications systems involved Planning the routes for all cabling or wireless Choosing appropriate cabling and media

In premises applications, 0TDRs are limited in usefulness by their _______.

Distance resolution

What is the most helpful information you can have when trying to troubleshoot a cabling network for restoration?

Documentation

_________ of the cable plant is a necessary part of the design and installation process for a fiber optic network that is often overlooked

Documentation

Which performance requirements are not shared by connectors and splices?

Durability under repeated matings

The minimum long-term bend radius of installed fiber optic cable is usually specified as no less than _______.

10 times the outside diameter

Fiber amplifiers and DWDM work in the __________ wavelength range.

1480-1650

How many methods are included in standard for setting the "0 dB" reference for lost testing?

3

The diameter of the core in 0M2 and OM3 multimode fiber is how large?

50 microns

What wavelengths are appropriate for use with multimode fiber?

850 and 1,300 nm

The loss of a multimode graded index fiber is greatest at ____________.

850 nm

What is the core size of a single mode fiber?

9 microns

Factory terminations, such as used for making patchcords, generally use what method of attaching the connector to the cable?

Epoxy/Polish

Connectors at each end of the cable plant should not be counted when calculating the cable plant loss.

False

Dangerous late from fiber optic cables is bright and easily visible

False

Discussions of which of which is better - copper, fiber or wireless - are no longer relevant, as fiber is the only choice.

False

LED's have higher output power than LASER's.

False

Telephone networks have been converted to fiber, including long-distance and metropolitan networks, but fiber to the home (FTTH) is not yet feasible.

False

The SC and LC connectors have different size ferrules and cannot be mated.

False

The first consideration for any network is choosing the proper fiber optic cable type.

False

it may be more cost-effective for the fiber optic cabling in many projects to be custom designed and made.

False

The bandwidth & distance capability of optical fiber means that _________.

Fewer cables are needed Fewer repeaters are needed Less power is consumed by the network Less maintenance is required

Fiber optic network designers should have an in-depth knowledge of _________.

Fiber optic components and systems Installation process Applicable standards, codes and any other local regulations

What is needed to get low loss from a prepolished/splice connector?

Good cleave

The first version of TIA/EIA 568 standard for premises cabling called for the use of which connector?

SC

The largest contributor to fiber attenuation is _____________.

Scattering

Any cable that contains metallic conductors must be properly grounded and bonded.

True

Cables which contain both multimode and singlemode fiber's are called Hybrid cables.

True

Fiber is used in long distance phone networks because it is much cheaper than copper wire.

True

Fiber optic links generally used to fibers for full duplex (biodirectional) links.

True

Fiber optic network designers should have a knowledge of electrical power systems and hardware as well as communication design.

True

In an industrial environment, fiber is most often used to prevent electromagnetic interference.

True

In order to specify a fiber optic cable properly, you need to specify installation specifications as well as environmental specifications.

True

Most outside plant installations are single mode.

True

Most single mode field terminations are made by fusion splicing a factory made pigtail on to the cable.

True

Multimode fiber systems operation at speeds of 1 Gb/s or more use mostly VCSEL sources.

True

Single mode fiber has a smaller light carrying core than multimode fiber.

True

Singlemode fiber has more bandwidth the multimode fiber.

True

Splicing is very rare in premises networks.

True

Testing a fiber optic installation may require testing three times, cable before installation, each segment as installed and a final test of end to end loss.

True

The OTDR should never be used without a "launch cable" which is also called a "Pulse suppressor".

True

The biggest advantage of optical fiber is the fact it is the most cost effective means of transporting information.

True

What of a laser makes the effective bandwidth of multimode fiber higher than with LEDs?

Restricted modal launch

The design of cables of small size with very large fiber counts is usually ___.

Ribbon cable

The first requirement that must be considered for a new fiber optic project is?

Where the cable plan will be run

Loose tube cable requires a ___ to terminate with connectors.

Breakout kit

Long wavelength singlemode links at wavelengths in the range of 1300 to 1650 nm links must use __________ detectors in the receiver for the best sensitivity performance.

InGaAs

No cable should be installed indoors unless it?

Is UL listed for flame retardancy for NEC

Multimode transceivers use _________ sources depending on the requirements for a coupled power and bandwidth.

LED

Multimode graded-index glass fiber optic cables are tested with _________ sources at _________ and ___________ wavelengths.

LED 850 nm 1300 nm

What type of source is used for testing singlemode fiber?

Laser

The total loss of the fiber in the cable plant is calculated by multiplying the attenuation coefficient of the fiber by the ________.

Length

The principle of operation of OTDRs is similar to _______.

Radar

What is not necessary in a centralized fiber optic cabling agriculture?

Repeaters or hubs

The design of cables for high pulling tension in outside plant installations is usually ___.

Loose tube cable

Physical contact (PC) Polish on connectors is designed to reduce _______.

Loss and Reflectance

In single mode connectors, ________ is as important as low loss

Low reflectance

Copper networks can be converted to fiber optics using?

Media Converters

The standard method of testing installed multi mode cables in a cable plant is described in?

OFSTP-14

What test instruments are used for insertion loss testing?

OLTS

Most premises networks today should use ________ multimode fiber but backbone cables can contain ________ fibers for future expansion.

OM3, Singlemode

What does OTDR stand for?

Optical Time Domain Reflectometer

Which fiber typically has the largest core?

POF

All outdoor cables are specifically designed to ___.

Prevent moisture damage to the fiber

Armored cable is used in outside plant installations to ___.

Prevent rodent damage

Most building management systems use _________ cabling?

Proprietary copper

Short wavelength 850 nm links can use what detectors in the receiver?

Silicon

Black polyethylene jackets are used on outdoor tables for ________.

Sunlight and moisture protection

Which communications systems typically use fiber optic backbones?

Telephones CATV Internet Cell Phones

The advantage of a breakout cable over a distribution cable is __________?

The breakout cable can be installed and terminated without additional hardware for protection of the terminations

Cables should always be pulled with _________ to prevent damage

The cables strength members

OTDRs are used in outside plant cables to _________.

verify splice loss Measure length Find faults