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

31 Telecom Industry Questions and Answers:

1 :: What do you mean by FDMA? Explain?

Frequency Division Multiple Access or FDMA is a channel
access method used in multiple-access protocols as a
channelization protocol. FDMA gives users an individual
allocation of one or several frequency bands, or channels.
Multiple Access systems coordinate access between multiple
users. The users may also share access via different methods
such as TDMA, CDMA, or SDMA. These protocols are utilized
differently, at different levels of the theoretical OSI model.

Disadvantage: Crosstalk which causes interference on the
other frequency and may disrupt the transmission.

2 :: Which type antenna uses in mobile communication?

Pole Antenna-for local coverage.
Microwave Antenna-for point to point communication
transreciver,in different area BTS communication...

3 :: What is cdma technology?

CDMA means Code Division Multiple access.

4 :: What was CDMA origin?

It was orginated at USA.

5 :: How CDMA works?

Each user is assigned a unique code and they can use the
entire bandwidth available.It is like Ten persons in a
meeting room are talking at the same time but with
different languages.

6 :: How CDMA is different from gsm?

GSM is Global System For Mobile Communication.GSM uses
Time Division Multiple Access means Ten persons in a
meeting room and only speaks whenever their turn comes.

7 :: Explain IPV4 and IPv6 address bit?

IPV6 is advanced version of IPV4.
the address of IPV^ is 128 bits with extend able memory and
that of IPV$ is 32 bits.

8 :: Explain IP addresses range A,B,C,D,E?

Class A to Supports 16 million
hosts on each of 127 networks.
Class B to Supports 65,000 hosts
on each of 16,000 networks.
Class C to Supports 254 hosts on
each of 2 million networks.
Class D to Reserved for multicast
Class E to Reserved for future
use, or Research and Development Purposes.

9 :: What is the difference between Internet and ISDN?

Isdn is a type of data and internet service that makes use
of digital signals running along existing copper lines to
increase the data throughput, reduce line noise and enhance
signal quality. Whereas, Internet is a packet-switched
network of interconnected computers, enabling users to
share information along multiple channels. Channels which
can be made available by using ISDN for example! That makes
the difference.