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“Telecommunications Interview Questions and Answers will guide you that Telecommunication is transmission over a distance for the purpose of communication. Telecommunication is an important part of the world economy and the telecommunication industry revenue is increasing day by day. Telecommunications Interview Questions and Answers guide will help you get in the Telecommunications market by preparation job interview with our Telecommunications Interview Questions and Answers.”



24 Telecommunications Questions And Answers

1⟩ How to explain what is ss7?

Common Channel Signaling System No. 7 (i.e., SS7 or C7) is a global standard for telecommunications defined by the International Telecommunication Union (ITU) Telecommunication Standardization Sector (ITU-T). The standard defines the procedures and protocol by which network elements in the public switched telephone network (PSTN) exchange information over a digital signaling network to effect wireless (cellular) and wireline call setup, routing and control.

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3⟩ Buffering is? a) the process of temporarily storing the data to allow for small variation in device speeds b) a method to reduce cross talks c) storage of data within transmitting medium until the receiver is ready to receive. d) a method to reduce routing overhead.

storage of data within transmitting medium until the receiver is ready to receive.

in my opinion the following procedure buffering follws so ans is c not a.

The following procedure follows:-

1 An alarm is written into the buffer.

2The alarm is read from the buffer, sent, and re-sent until it successfully reaches the destination(receiver).

3 The alarm is removed from the buffer.

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10⟩ What action is taken when the processor under execution is interrupted by a non-maskable interrupt? a) Processor serves the interrupt request after completing the execution of the current instruction. b) Processor serves the interrupt request after completing the current task. c) Processor serves the interrupt request immediately. d) Processor serving the interrupt request depends upon the priority of the current task under execution.

Processor serves the interrupt request after completing the execution of the current instruction.

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12⟩ How many T1 facilities the company needs between its office and the PSTN if it has 47 digital telephones, each operating at 64kbps 3 low-speed video machines, each operating at 384kbps 1 interactive video system, requiring 1.536 mbps.

Need 4 T1's.

Each T1 can accomodate 28 channels.

► 47 digital channels

► 3 low speed V.machines at 384 kbps.

=384/64=6channels

► 1 interactive video systemat 1.536mbps.

=153664=24 channels.

So total=47+6+24=89 channels

each T1 requires 1 synchronizing channel & 1 signalling channel.

So 4 T1 requires 8 channels.

Total=89+8=97 channels.

4T1's =112 channels-96 channels=15 channels(remains free)

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13⟩ What is the need of CPG message in ISUP protocol?

Consider any call forwarding scenario.As soon as switch receives Setup, it checks that the Called_Party has forwarded option activated and so tries to forward the call. Meanwhile, Switch sends CPG message towards originator saying that Call is in Progress.

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14⟩ Line of sight is? a) Straight Line b) Parabolic c) Tx & Rx should be visible to each other d) none of the above

The line of sight is the distance or the path up to which the the TX and the RX is visible to each other because for the proper transmission there should be a ink or connectivity b/w the TX and the RX e.g. at the RF transmission the microwave links are required for the connectivity and data transmission.

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