Following are most asked Telecommunication Interview Questions, Answers and Tips. These sample Telecommunication Interview questions are part of normally asked questionnaire.

Sample Telecommunication Interview Questions:

What are the basic building blocks of Telecommunication?

Basics of telecommunication deals with telephony and telephone systems, including sound propagation, telephone system management and structure, networking, regulatory controls, various industry acknowledged associations. Telecommunication deals with the nature of energy and its propagation over electronic media.

Explain the basics of Telephony and sound propagation.

Telephony involves the transmission of sound over long distances. This sound could be human voice, music, video, images or simply data. The public telephone network is built primarily to carry voice data over wired or wireless network working electronically in tandem with a well defined set of protocols. We know, however, that individuals and businesses today can transmit voice, data, images, video, and other types of information over this network. Care needs to be taken to minimize data losses, unwanted noise introduced by the electronics involved in the system of propagation. More sophisticated systems are available to avoid error free communication these days. The choice of selecting the right set of hardware/ software and related infrastructure majorly affect cost to build the system and in turn the business of the organization.

What is noise? How does it affect the communication?

With the introduction of electrical and electro mechanical hardware to the communication system affects the data to be transferred. The transmission data incurs losses as it moves away from the source to its destination. Since it is energy, which at first is concentrated, spreads out over a larger area as the pressure wave moves away from the source. It loses its potential due to the inelastic way that air molecules collide with one another internally. These losses affect the distance of transmission, quality of received data and mainly the medium of communication. There are ways to amplify the signal as it leaves the source at a predetermined distance of communication lines, but even this limits the transmission to distances of 3000 feet or less. Transmitting sound over longer distances requires a system which is highly sophisticated in design and infrastructure.

Explain Network Structure in a Telephone

A simple telephone network communication can be established by running metal wires between the users of the telephone system. But this has a great disadvantage of overwhelming requirement of cable wires and not a practical idea. More sophisticated telephone systems use a kind of switch called network switch. This switch is designed to provide a centralized solution to communication utilizing the unused number of lines for communication. This could be thought of as a system with one dial pad at the center at a common area with number of transmitters and receivers at each user connected to the dial pad. Network switch uses this dial pad to connect different users in the system. But this system introduces one disadvantage that only two users can use the system at any given time that means one line of communication can established at any given time. These types of communication systems are called local loops.

Potential real estate agents have to face series of questions about their knowledge and market experience by smart consumers before hired by them. In a real estate firm, like any other firms like a law firm, a real estate agent will likely be interviewing you. Apart from generic quality of a typical interview process, be wary of agents who don’t ask you questions and probe for your motivation. After all you would not want to work with just any agent off the street, and as a potential hire, you are just as selective about your customer too. Be prepared to explain your vast experience in the industry and share your honest opinion on the current market and economy related to the real estate industry.

What are switching networks and what the different types of switching networks are you aware of?

The switching network is the structure that connects terminations, either lines or trunks. All lines, trunks, and service circuits must terminate on the switching network. The switching networks are of the following types:

Electromechanical is a relay based system that connects separate wires of transmission path between two users of the communication systems.

Completely electronic uses separate solid-state switching elements to connect two distant systems physically to establish communication path between the users.

Fully digital systems establish the connections by dividing and rearranging the time slots when samples of conversations are passed from one termination to another.

What are trunks? Explain the functionality of trunks.

Trunks are used to connect the transmission between switches. Trunks are looked as high-quality multiplexed digital facilities. These digital facilities could be made of either metallic wires or optical cables. Trunks can be thousands of miles long and are shared sequentially by all the customers within the network system. Because trunks can be quite long and are far fewer in number than local loops, it is important and economically viable to provide much better quality of transmission trunks than on the local loops. Trunks are typically digital and four wire if copper or these days more sophisticated fiber optic systems are available which provide greater performance. This is a known trade-off between service cost and quality is common in the public telephone network systems. The intension for such system is to yield affordable service to the users and reasonable profits to the provider. It makes sense to spend money for high-quality transmission on relatively few trunks. On the user side, the sheer number of local loops makes such an approach cost-prohibitive.

What are private networks? What is the difference between public network systems and private network systems?

While the systems explained above just described how a public network system works, you can have your own private network established between a limited number of users or inside a small community. Some have been built by utilities and other companies that have the right of way to build their own facilities. Others may be built by leasing facilities from the telephone company. Elements of private networks are similar to those of the public network, except that the names of the components are changed. Like a trunk in a public network system, a private network is managed by something called private branch exchange (PBX) which is a telephone switch owned by a customer and located on its premises. The PBX establishes connections between its stations in the same way that a switch does. It also provides a connection to the public network or to a larger private network.

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