SDE to AGM (LICE) Page 4 of 194 - Optical Fiber Communication

What is the basic principle of operation of an optical fiber communication system?

Transmission of meridional rays
Transmission of electromagnetic waves (correct)
Transmission of chemical signals
Transmission of mechanical vibrations

Which technology provides an overview of SDH and NGSDH in the field of optical fiber communication?

DWDM Technology (correct)
Terrestrial Radio Links
FTTH Technology
FSO & Li-Fi Communication

What does CPAN stand for in the context of optical fiber communication?

Controlled Personal Area Network
Communications Protocol Access Node
Customer Premises Area Network (correct)
Centralized Passive Aggregation Network

In the realm of optical fiber communication, what does OTN stand for?

Optical Transport Network (A) Signup and view all the answers

Which technology provides an overview of DWDM in the field of optical fiber communication?

CPAN and OTN Technology (C) Signup and view all the answers

What is the purpose of a variable range marker in an OTDR display?

To display the length of the fiber being measured (A) Signup and view all the answers

How many markers are usually provided in an OTDR display for measurement purposes?

Five (D) Signup and view all the answers

What type of link is used to download OTDR data to a computer?

RS232 link (B) Signup and view all the answers

Which technology does OTDR primarily relate to?

SDH technology (A) Signup and view all the answers

What is the purpose of providing hard copies of information on an OTDR display?

For record-keeping or further documentation (C) Signup and view all the answers

What is the main purpose of ITU-T G.653 Compliant Dispersion shifted fiber?

Minimize dispersion value at 1550nm (D) Signup and view all the answers

Which type of fiber is known for extremely low attenuation at 1550nm, making it suitable for long span applications without repeaters?

ITU-T G.654 Compliant Fiber (D) Signup and view all the answers

What is the specific characteristic of ITU-T G.655 Compliant Non-zero dispersion shifted fiber (NZDSF) that helps solve nonlinear effects?

Non-zero dispersion at 1550nm (B) Signup and view all the answers

Why are ITU-T G.653 Compliant fibers known to generate more troubles despite their good purpose?

Zero dispersion at 1550nm (C) Signup and view all the answers

Which ITU-T Compliant fiber type was specifically introduced in the mid-1990s for WDM applications?

ITU-T G.655 Compliant Fiber (A) Signup and view all the answers

What is the significance of the choice of 'on' time or pulsewidth in an OTDR?

It influences the timing process in the display. (C) Signup and view all the answers

What is the key advantage of optical fiber communication in terms of signal security?

100% signal security (A) Signup and view all the answers

What role does the Directive Coupler play in an OTDR?

Reflecting light into the avalanche photodiode (C) Signup and view all the answers

How are fiber optic cables superior to copper cables in terms of storage and handling?

Fiber optic cables are lighter, flexible, and easier to handle than copper cables (A) Signup and view all the answers

Why is amplification necessary for the electrical signal from the APD in an OTDR?

Because the electrical signal is very weak (B) Signup and view all the answers

What is the sequence of transmission in an optical fiber communication system?

Information is encoded into electrical signals, then converted into light signals (C) Signup and view all the answers

In an OTDR, what type of display is used to show the returned signals?

CRT like an oscilloscope (C) Signup and view all the answers

Why does repeater spacing increase along with operating speeds in optical fiber communication systems?

Due to the use of low loss fibers at high data rates (B) Signup and view all the answers

How does the timer function in relation to an OTDR's operation?

Produces a voltage pulse to activate the laser (D) Signup and view all the answers

What is the significance of the speed of light in optical fiber communication?

It dictates the velocity of electromagnetic energy in materials like glass (B) Signup and view all the answers

What is the main purpose of the OTDR technique?

To localize faults in the optical network (B) Signup and view all the answers

What leads to the backscatter effect in optical fibers?

Reflection due to changes in glass molecular density (C) Signup and view all the answers

What components are essential in the structure of an OTDR?

Light source, optical receiver, and data processing unit (C) Signup and view all the answers

How is the time delay between outgoing and incoming signals measured in an OTDR?

By synchronizing the light source with the optical receiver (C) Signup and view all the answers

What is the relationship between incoming power and backscatter power in an OTDR?

Incoming power and backscatter power decrease together (B) Signup and view all the answers

What has led to the increase in bandwidth requirement from 20Kbps to around 1Gbps in optical fibre transmission?

Convergence of client terminals with voice, video, text, web, and multimedia capabilities (D) Signup and view all the answers

How has the use of optical fibre as a transmission media improved presentability of human interfaces?

By incorporating signals from sensory organs like touch, vision, mind (B) Signup and view all the answers

Which technology is mentioned in the text that is causing multiplexing to migrate from TDM and FDM to packet-based statistical multiplexing?

OTN technology overview (D) Signup and view all the answers

What factor is driving the convergence of access networks according to the text?

Development of IP & MPLS technologies (C) Signup and view all the answers

How are client terminals evolving based on the information provided?

Enhanced GUI-based web interface and improved multimedia processing capabilities (D) Signup and view all the answers