Voice Gateways Interview Preparation Guide
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Telecom Voice Gateways frequently Asked Questions by expert members with experience in Voice Gateways. These interview questions and answers on Telecom Voice Gateways will help you strengthen your technical skills, prepare for the interviews and quickly revise the concepts. So get preparation for the Telecom Voice Gateways job interview

9 Telecom Voice Gateways Questions and Answers:

1 :: What is buffering?

It is the process of temporarily storing the data so that
the data is available for some activity (re-sequencing etc.)
The result of this is delay in delivery of the packets and
hence, variation in speed of packet delivery.
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2 :: Explain the type of signaling used between two exchanges?

In Band (Single Frequency, Multi-Frequency (MF), and Dual-Tone Multi-Frequency (DTMF)), Common Channel Signalling (CCS) and Signalling System 7 (SS7) is used Between the exchanges.

But CCS and SS7 are more cheaper than MF.
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4 :: Tell me What action is taken when the processor under execution is interrupted by a non-maskable interrupt?

non maskable interrupt r those 2 whom processor must have 2 respond instantly.....

4 maskable interrupts it should complete current instruction n then come over it..
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5 :: Explain What is the Purpose of PC(Program Counter) in a MicroProcessor?

Program Counter in a microprocessor (or CPU) is a pointer
instruction of the program to tell where the CPU to look
for the next instruction.
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6 :: Explain At which Frequency VOICE is sampled?

if you sample a signal in regular
intervals of at least twice the highest channel frequency,
the sample will contain enough information to accurately
reconstruct the signal.
Human Audible Range: 20 – 20,000 Hz
Human Speech: 200 – 9000 Hz
Telephone channel: 300 – 3,400 Hz
Nyquist theorem: 300 – 4000 Hz
Sample size = (2 * 4000) 8000, 8000 * 8 bits =
64,000 bps = 64 kbps
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7 :: Do you know What is the maximal decimal number that can be accommodated in a byte?

256

SINCE, 1 BYTE=8 BITS

THE LOGIC IS 2^8=256(2 TO THE POWER OF 8)
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8 :: Tell me What is the Max number of satellite hops allowed in voice communication?

Logically speaking, whatever be the number of hops, the
fixed delay should not go more than 150ms (one-way).
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9 :: What is the time taken for 1 satellite hop in voice communication?

The satellite delay for single hop SCPC link is about
525-550ms. But for TDMA network, the delay varies
between 550ms - 700ms.
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