A sample rate of ________is required for a good quality representation of telephone conversation. (A) 4500 times per second. (B) 700 integer sample points per minute. (C) 50 times per second per mile of distance travelled. (D) 8000 times per second.

A sample rate of ________is required for a good quality representation of telephone conversation.
(A) 4500 times per second.
(B) 700 integer sample points per minute.
(C) 50 times per second per mile of distance travelled.
 (D) 8000 times per second.
by

1 Answer

Answer :

(C) 50 times per second per mile of distance travelled.
by

Related questions

The ________is a circuit-switched network, while the ______is a packet-switched network. (A) Telephone, ATM (B) SONET and FDDI (C) Satellite, Telephone (D) FDDI and SONET

Description : The ________is a circuit-switched network, while the ______is a packet-switched network. (A) Telephone, ATM (B) SONET and FDDI (C) Satellite, Telephone (D) FDDI and SONET

Last Answer : (A) Telephone, ATM

Telephone Traffic is measured in (A) Seconds. (B) Hours. (C) Erlang (D) Pulses per minute.

Description : Telephone Traffic is measured in (A) Seconds. (B) Hours. (C) Erlang (D) Pulses per minute.

Last Answer : (C) Erlang

The monthly incomes of two persons are in the ratio 5 : 4 and their monthly expenditures are in the ratio 9 : 7. If each person saves Rs. 500 per month, then what are their monthly incomes? a) Rs 8000 and Rs 10000 b) Rs 3750 and Rs 3000 c) Rs 5000 and Rs 4000 d) Rs 4500 and Rs 4000 e) None of the above

Description : The monthly incomes of two persons are in the ratio 5 : 4 and their monthly expenditures are in the ratio 9 : 7. If each person saves Rs. 500 per month, then what are their monthly incomes? a) Rs 8000 and Rs ... Rs 3750 and Rs 3000 c) Rs 5000 and Rs 4000 d) Rs 4500 and Rs 4000 e) None of the above

Last Answer : Let the incomes of two persons be 5x and 4x let the expenditures of them be 9y and 7y Each person saves Rs. 500 Therefore, 5x - 9y = 500 4x - 7y = 500 Solving the above equations, 20x - 36y = 2000 20x - ... = 500 + 9(500) = 5000 X = 1000 Hence, their salaries are Rs. 5000 and Rs. 4000 Answer: c)

Discuss different Routing plan adopted in a Telephone network.

Description : Discuss different Routing plan adopted in a Telephone network.

Last Answer : Hierarchical networks are capable of handing heavy traffic where required, and at the same time use minimal number of trunk groups. Three methods are used for deciding on the route for a ... selection methods can be implemented. Computer based routing is a standard feature in data networks.  

Explain simple telephone communication system with circuit and equation of current flow in microphone?

Description : Explain simple telephone communication system with circuit and equation of current flow in microphone?

Last Answer : Simple Telephone Communication: In the simplest form of a telephone circuit, there is one way communication involving two entities, one receiving (listening) and the other transmitting (talking).   ... carrier wave in AM system. The quantity m is equivalent to the modulation index in AM. 

Write short notes (i)Telephone hand set and it’s working. (ii) CPU based exchange

Description : Write short notes (i)Telephone hand set and it’s working. (ii) CPU based exchange

Last Answer : (i) A standard telephone set is comprised of a transmitter, a receiver, and electrical network for equalization, associated circuitry to control side tone levels and to regulate signal power, ... commands are designed to be of variable length necessitating the use of an end-of-command symbol  

What is the need of a hybrid in telephone networks? How does it work?

Description : What is the need of a hybrid in telephone networks? How does it work?

Last Answer :  Digital exchanges require receive and transmit signals on separate two-wire circuits. This calls for two-wire to four-wire conversion. Such a conversion is normally required for trunk transmissions in ... from the subscriber end is completely nullified from coupling into the winding A.  

What is store program control (SPC)? Give the organization of centralized SPC. Discuss the advantages of SPC automation in telephone switching.

Description : What is store program control (SPC)? Give the organization of centralized SPC. Discuss the advantages of SPC automation in telephone switching.

Last Answer :  In stored program control systems, a program or set of instructions to the computer is stored in its memory and the instructions are executed automatically one by one by the processor. Carrying out ... of services can be provided to customers.  (v) Increase level of automotive in switching 

A certain amount of side tone is essential in telephone communication (A) TRUE (B) FALSE

Description : A certain amount of side tone is essential in telephone communication (A) TRUE (B) FALSE

Last Answer : Ans: (A)

Engaged tone is generated in the: (A) Telephone instrument of calling subscriber (B) Telephone instrument of called subscriber (C) Exchange (D) Repeater

Description : Engaged tone is generated in the: (A) Telephone instrument of calling subscriber (B) Telephone instrument of called subscriber (C) Exchange (D) Repeater

Last Answer : (C) Exchange

Example of circuit switching and S&F (Stored and Forward) switching is (A) Telephone and Post of Telegraph (B) Video Signal Post or Telegraph (C) Digital Signal Post or Telegraph (D) None of above

Description : Example of circuit switching and S&F (Stored and Forward) switching is (A) Telephone and Post of Telegraph (B) Video Signal Post or Telegraph (C) Digital Signal Post or Telegraph (D) None of above

Last Answer : (A) Telephone and Post of Telegraph

Distortion caused on telephone line by an adjacent one is called (A) Cross Fire (B) Inductive Disturbance (C) Cross Talk (D) None of these

Description : Distortion caused on telephone line by an adjacent one is called (A) Cross Fire (B) Inductive Disturbance (C) Cross Talk (D) None of these

Last Answer : (C) Cross Talk

The bandwidth requirement of a telephone channel is (A) 3 KHz (B) 15 KHz (C) 5 KHz (D) 25 KHz

Description : The bandwidth requirement of a telephone channel is (A) 3 KHz (B) 15 KHz (C) 5 KHz (D) 25 KHz

Last Answer : (A) 3 KHz

Telex is a (A) Telephone Service between various subscribers (B) Tele printer Service between various subscribers (C) Television Service between various subscribers (D) Telegraph Service between various subscribers

Description : Telex is a (A) Telephone Service between various subscribers (B) Tele printer Service between various subscribers (C) Television Service between various subscribers (D) Telegraph Service between various subscribers

Last Answer : (B) Tele printer Service between various subscribers

Which transmission mode is used for data communication along telephone lines? (A) Parallel (B) Serial (C) Synchronous (D) Asynchronous

Description : Which transmission mode is used for data communication along telephone lines? (A) Parallel (B) Serial (C) Synchronous (D) Asynchronous

Last Answer : (B) Serial

Telephone companies normally provide a voltage of __________to power telephones. (A) +24 volts DC (B) -24 volts DC (C) +48 volts DC (D) -48 volts DC.

Description : Telephone companies normally provide a voltage of __________to power telephones. (A) +24 volts DC (B) -24 volts DC (C) +48 volts DC (D) -48 volts DC.

Last Answer : (D) -48 volts DC.

In a time multiplexed space switching system, one speech sample appears every (A) 125 micro sec (B) 20 msec (C) 125 msec (D) 1 sec

Description : In a time multiplexed space switching system, one speech sample appears every (A) 125 micro sec (B) 20 msec (C) 125 msec (D) 1 sec

Last Answer : (A) 125 micro sec

The number of point to point links required in a fully connected network for 50 entities is (A) 1250 (B) 1225 (C) 2500 (D) 50

Description : The number of point to point links required in a fully connected network for 50 entities is (A) 1250 (B) 1225 (C) 2500 (D) 50

Last Answer : Ans: (C)

A train travelling at 20 m s-1 accelerates at 0.5 m s-2 for 30 s, the distance travelled by train is A. 825 m B. 700 m C. 650 m D. 600 m

Description : A train travelling at 20 m s-1 accelerates at 0.5 m s-2 for 30 s, the distance travelled by train is A. 825 m B. 700 m C. 650 m D. 600 m

Last Answer : 825 m

As per Nyquist criterion the sampling rate is (A) 2fs (B) (1/2)fs (C) (1/2fs) (D) (2/fs) Where fs is the signal frequency

Description : As per Nyquist criterion the sampling rate is (A) 2fs (B) (1/2)fs (C) (1/2fs) (D) (2/fs) Where fs is the signal frequency

Last Answer : (A) 2fs

Why aren't those who stutter & stammer charged a lower per-minute rate, on long distance telephone calls?

Description : Why aren't those who stutter & stammer charged a lower per-minute rate, on long distance telephone calls?

Last Answer : jack: then using that logic, would someone who is a slow talker be eligible for a lower rate, also? to the phone company, a minute is a minute, an hour is an hour, a month is a month.

A tank can be filled by an inlet tap at the rate of 8 litres per minute. A leak in the bottom of a tank can empty the full tank in 16 hours. When the tank is full, the inlet is opened and due to the leak, the tank is empty in 80 hours. How many litres does the tank hold? A) 8000 litre B) 9560 litre C) 8525 litre D) 9600 litre

Description : A tank can be filled by an inlet tap at the rate of 8 litres per minute. A leak in the bottom of a tank can empty the full tank in 16 hours. When the tank is full, the inlet is opened and due to ... hours. How many litres does the tank hold? A) 8000 litre B) 9560 litre C) 8525 litre D) 9600 litre

Last Answer : D Part emptied by the leak in 1 hour = 1/16 part filled by (leak & inlet open) in 1 hour = 1/80 Part filled by the inlet tap in 1 hour = 1/16 – 1/80 = 1/20 Inlet tap fills the tank in = 20 hours Inlet tap fills water at the rate of 8 litres a minute. Capacity of tank = 20 * 60 * 8= 9600 litre

Consider a CSMA/CD network that transmits data at a rate of 100 Mbps (108 bits per second) over a 1 km (kilometre) cable with no repeaters. If the minimum frame size required for this network is 1250 bytes, what is the signal speed (km/sec) in the cable? a. 8000 b. 10000 c. 16000 d. 20000

Description : Consider a CSMA/CD network that transmits data at a rate of 100 Mbps (108 bits per second) over a 1 km (kilometre) cable with no repeaters. If the minimum frame size required for this network is 1250 bytes, what is the signal speed (km/sec) in the cable? a. 8000 b. 10000 c. 16000 d. 20000

Last Answer : d. 20000

The Signalling connection control part (SCCP) and message transfer part (MTP) together are referred to as (A) Signal Switching Points (SSPs) (B) Signal Transfer Points (STPs) (C) Signal Control Points (SCPs) (D) Network service part (NSP)

Description : The Signalling connection control part (SCCP) and message transfer part (MTP) together are referred to as (A) Signal Switching Points (SSPs) (B) Signal Transfer Points (STPs) (C) Signal Control Points (SCPs) (D) Network service part (NSP)

Last Answer : (D) Network service part (NSP)

In a single stage network: (A) There is no redundancy (B) There is redundancy (C) Alternative cross points are available (D) Alternative paths are available

Description : In a single stage network: (A) There is no redundancy (B) There is redundancy (C) Alternative cross points are available (D) Alternative paths are available

Last Answer : (B) There is redundancy

The heart rate in an adult person is – (1) 50-60 times per minute (2) 70-80 times per hour (3) 70-80 times per second (4) 70-80 times per minute

Description : The heart rate in an adult person is – (1) 50-60 times per minute (2) 70-80 times per hour (3) 70-80 times per second (4) 70-80 times per minute

Last Answer : (4) 70-80 times per minute Explanation: Heart rate refers to the speed of the heartbeat, specifically the number of heartbeats per unit of time. The heart rate is typically expressed as beats per minute ( ... heart rate ranges from 60- 100 bpm; however 70-80 bpm is treated as the normal in adults.

The heart rate in an adult person is (1) 50-60 times per minute (2) 70-80 times per hour (3) 70-80 times per second (4) 70-80 times per minute

Description : The heart rate in an adult person is (1) 50-60 times per minute (2) 70-80 times per hour (3) 70-80 times per second (4) 70-80 times per minute

Last Answer : 70-80 times per minute

An important terminal that is required between DTE and PSTN is (A) Server (B) MODEM (C) Relay (D) Network card

Description : An important terminal that is required between DTE and PSTN is (A) Server (B) MODEM (C) Relay (D) Network card

Last Answer : (B) MODEM

The temperature in the calcium carbide furnace is __________ °C. (A) 200-300 (B) 700-850 (C) 2000-2200 (D) 4000-4500

Description : The temperature in the calcium carbide furnace is __________ °C. (A) 200-300 (B) 700-850 (C) 2000-2200 (D) 4000-4500

Last Answer : (C) 2000-2200

Classify data networks. Explain with the help of Nyquist theorem, the data rate limitations in PSTN’s. Give an account of modems used in data transfer. Explain their importance and list some of the V-series recommendations.

Description : Classify data networks. Explain with the help of Nyquist theorem, the data rate limitations in PSTN’s. Give an account of modems used in data transfer. Explain their importance and list some of the V-series recommendations.

Last Answer : Classifications of Data Network:  Data Networks are classified according to their geographical coverage: Wide area networks (WANs) Metropolitan area networks(MANs) Local area ...  V.53 Limits for the maintenance of telephone type circuits used for data transmission. 

The analog signal needs to be sampled at a minimum sampling rate of: (A) 2fs (B) 1/(2fs) (C) fs/2 (D) 2/fs

Description : The analog signal needs to be sampled at a minimum sampling rate of: (A) 2fs (B) 1/(2fs) (C) fs/2 (D) 2/fs

Last Answer : (A) 2fs

Erlang is used to (A) Measure busy period (B) Give total busy period in minutes (C) Measure average call rate (D) Indicate total call period

Description : Erlang is used to (A) Measure busy period (B) Give total busy period in minutes (C) Measure average call rate (D) Indicate total call period

Last Answer : (A) Measure busy period

Broad Band ISDN handles data rate of about (A) 64 kbps (B) 100 mbps (C) 5.4 mbps (D) 2.048 mbps

Description : Broad Band ISDN handles data rate of about (A) 64 kbps (B) 100 mbps (C) 5.4 mbps (D) 2.048 mbps

Last Answer : (A) 64 kbps

________is easy to use wizard that helps to create a presentation by leading through some basic questions: a) Auto Content Wizard b) Auto Presentation Wizard c) Sample Presentation Wizard d) None of These

Description : ________is easy to use wizard that helps to create a presentation by leading through some basic questions: a) Auto Content Wizard b) Auto Presentation Wizard c) Sample Presentation Wizard d) None of These

Last Answer : a) Auto Content Wizard

An 18-year-old man shot once in the left chest has a blood pressure of 80/50 mm. Hg, a heart rate of 130 beats per minute, and distended neck veins. Immediate treatment might include: A. Administration of one liter of Ringer's lactate solution. B. Subxiphoid pericardiotomy. C. Needle decompression of the left chest in the second intercostal space. D. Emergency thoracotomy to cross-clamp the aorta.

Description : An 18-year-old man shot once in the left chest has a blood pressure of 80/50 mm. Hg, a heart rate of 130 beats per minute, and distended neck veins. Immediate treatment might include: A. ... of the left chest in the second intercostal space. D. Emergency thoracotomy to cross-clamp the aorta.

Last Answer : Answer: AC DISCUSSION: The finding of distended neck veins in conjunction with hypotension should suggest tension pneumothorax or pericardial tamponade. Absent ipsilateral breath sounds and a trachea ... injuries. There is no role for aortic cross-clamping in this scenario of cardiogenic shock

A train starts from Delhi and reaches Lucknow in 24.5 hours. If it travels the first half of journey at 30 kmph and second half at 40 kmph then what is the total distance it travelled? 1) 750 km 2) 800 km 3) 840 km 4) 900 km 5) 920 km

Description : A train starts from Delhi and reaches Lucknow in 24.5 hours. If it travels the first half of journey at 30 kmph and second half at 40 kmph then what is the total distance it travelled? 1) 750 km 2) 800 km 3) 840 km 4) 900 km 5) 920 km

Last Answer : 3) 840 km

2 bus start from A & B respectively and travel towards each other at a speed of 150 km/hr and 120 km/hr respectively. By the time they meet, the first bus has travelled by 300km more than the second. The distance between A & B is a) 2700 b) 2800 c) 2750 d) 2457

Description : 2 bus start from A & B respectively and travel towards each other at a speed of 150 km/hr and 120 km/hr respectively. By the time they meet, the first bus has travelled by 300km more than the second. The distance between A & B is a) 2700 b) 2800 c) 2750 d) 2457

Last Answer : A At the time of meeting, Let the distance travelled by the second bus be xkm Then distance covered by the 1st bus is (x+300)km x/120= (x+300) /150 150x = 120(x+300) 150x = 120x +36000 30x = ... X=36000/30 X=1200 So the distance covered between A & B =(x+x+300) =(1200+1200+300) =2700km.

Thanu can travel 24 miles downstream in a certain river in 12hrs less than it takes him to travel the same distance upstream. But if he could double his usual rowing rate for his 48 mile round trip, the downstream 24 miles would then take only 2hr less than the upstream 24miles. What is the speed of the current in miles per hour? A) 2 / 3 miles/hr B) 8 / 3 miles/hr C) 7 / 5 miles/hr D) 3 / 5 miles/hr

Description : Thanu can travel 24 miles downstream in a certain river in 12hrs less than it takes him to travel the same distance upstream. But if he could double his usual rowing rate for his 48 mile round trip, the downstream 24 miles would ... 3 miles/hr B) 8 / 3 miles/hr C) 7 / 5 miles/hr D) 3 / 5 miles/hr 

Last Answer : ANSWER : B 

The distance travelled per turn of α-helix in nm is (A) 0.34 (B) 0.44 (C) 0.54 (D) 0.64

Description : The distance travelled per turn of α-helix in nm is (A) 0.34 (B) 0.44 (C) 0.54 (D) 0.64

Last Answer : Answer : C

A small dairy farm daily produces 100 kilograms of average quality buffalo milk and sells it to an organised dairy at the rate of Rs. 100 per kilogram of total solids contained in the milk. How much would be the daily gross income of the farm from the sale of milk ? (A) Between Rs. 2,000 and Rs. 2,200 (B) Between Rs. 1,250 and Rs. 1,400 (C) Between Rs. 700 and Rs. 825 (D) Between Rs. 1,000 and Rs. 1,100 (E) Between Rs. 1,650 and Rs. 1,850

Description : A small dairy farm daily produces 100 kilograms of average quality buffalo milk and sells it to an organised dairy at the rate of Rs. 100 per kilogram of total solids contained in the milk. How much would be the daily gross ... (D) Between Rs. 1,000 and Rs. 1,100 (E) Between Rs. 1,650 and Rs. 1,850

Last Answer : (B) Between Rs. 1,250 and Rs. 1,400

What do you mean by numbering and addressing? Draw the ISDN address structure and explain how the addressing works?

Description : What do you mean by numbering and addressing? Draw the ISDN address structure and explain how the addressing works?

Last Answer :  Numbering and Addressing: In telephone and data networks, the end equipments are more often single units than multiple devices units like PABX or LAN. Historically, a telephone, a computer, or a ... as reference point may also be addressed by using direct inward dialing (DID) feature.  

Explain the process of inter-register signalling.

Description : Explain the process of inter-register signalling.

Last Answer : Registers are used in common control exchanges to store and analyze routing data. They are provided on a common basis is a single register provides routing data for a number of speech circuits. Once a call ... it is released and the originating register signals to the next register.

Draw a centralized SPC organization and explain how it works under load sharing operation.

Description : Draw a centralized SPC organization and explain how it works under load sharing operation.

Last Answer : In centralized control, all the control equipment is replaced by a single processor which must be quite powerful. It must be capable of processing 10 to 100 calls per second, depending on the ... both the processors are active simultaneously and share the load and the resources dynamically.  

Explain FDM and show how CCITT standards help in building the base band?

Description : Explain FDM and show how CCITT standards help in building the base band?

Last Answer : Frequency Division Multiplexing: It is the process of combining several information channels by shifting their signals to different frequency groups within the spectrum so that they can be transmitted simultaneously ... of 24 channels were assembled together in one stage of modulation.     

What are transmission bridges? How do they help in satisfying the connectivity?

Description : What are transmission bridges? How do they help in satisfying the connectivity?

Last Answer : A typical transmission bridge is shown in Fig. The series capacitance and the shunt inductances of the two relays provide a high-pass filter to transmit the AC speech signals, while the relays respond independently to the DC loop/disconnect signals from the calling and called customer.  

What are the different ways of designing 100 line exchange using uni selector and two motion selectors? Show at least three variations. Which is the best option?

Description : What are the different ways of designing 100 line exchange using uni selector and two motion selectors? Show at least three variations. Which is the best option?

Last Answer : Here three different designing methods for 100 line exchange are discussed: Design 1: Here, Strowger switching system is designed using one two-motion selector for each subscriber. A ... only under certain specific traffic conditions and generally lead to higher blocking probabilities.  

How numbering plan is achieved in modern telephony? Give the structure with example.

Description : How numbering plan is achieved in modern telephony? Give the structure with example.

Last Answer :  The objective of numbering plan is to uniquely identify every subscriber connected to a telecommunication network. A numbering plan may be open, semiopen or closed. An open-numbering plan permits wide ... known as the subscriber number which is the number listed in the telephone directory.   

How does a touch tone receiver differs from pulsed dial receiver? Explain with schematic.

Description : How does a touch tone receiver differs from pulsed dial receiver? Explain with schematic.

Last Answer : Pulse dialing: 1. Generated through make and break contact. 2. DC Current pulse is generated. 3. Each number is separated by a short pause to prevent overlapping. 4. Codes ... dialing pulse is not misinterpreted as the phone being returned to its on-hook (idle) condition.   

Discuss briefly subscriber loop system. Give some technical specification for subscriber lines.

Description : Discuss briefly subscriber loop system. Give some technical specification for subscriber lines.

Last Answer : Subscriber Loop System: Every subscriber in a telephone network is connected generally to the nearest switching office by means of a dedicated pair of wires. Subscriber loop refers to this pair of wires. It is un ... 1. Diameter of wire 2. D.C. resistance per Km 3. Attenuation per Km 

What is Traffic Engineering? Define the term busy hour, traffic intensity and grade of service.

Description : What is Traffic Engineering? Define the term busy hour, traffic intensity and grade of service.

Last Answer : Traffic engineering provides the basis for analysis and design of telecommunication network to carry a given traffic at a particular loss probability. It provides a means to determine the quantum of common equipments ... A0  Where  A= offered traffic  A0 = carried traffic  A-A0= lost traffic