What Is A Telephone System ?

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A system where multiple telephones are used by businesses that allows for features like call handling and transferring, conference calling, call metering and accounting, private and shared voice message boxes, etc.

A business phone system can range from just a few telephones in a small business up to a complex private branch exchange (PBX) system utilized by large businesses.

Business telephone systems can function over the Public Switched Telephone Network (PSTN) and/or over the Internet (Internet telephony or VoIP).

What Are Types Of Telephone System ?

• Traditional telephone system.
• IP telephone system.

What Are The Components Of Telephone System ?


Telephone and its outlet (RJ-11).
•Place of RJ-11 depends on furniture of buildings and owner desire.
•Telephone conductor has a diameter of 0.4, 0.6 and 0.8 mm.
•Each telephone requires 1 pair +ve and –ve.
•Cable can be 1 P, 2 P,…..,100 P, 300 P,…,1000 P, 2000 P.


What Are The Components Of Traditional System ?


Telephone box or IDF (Intermediate distribution frame) or SDF( Sub distribution frame)
•It can be found in each floor or each area.
•It consists of modules each of 10 pairs.
•It is identified by how many pairs as 10,20,30,….. Pairs.


MDF or main distribution frame.

•It collects all cables from SDF or telephone boxes in all floors.
•Put at the entrance or in front of buildings.
•It is identified by number of pairs 10,20,...., 300 pairs or more.


PBX : Private branch exchange or EPBX : Electronic private branch exchange or EPBX : Electronic private branchy exchange

•Used in internal telephone system.
•Allow communication between telephone lines in the building.
•By programming it, we can identify which telephone lines will have an external line from telecom company.
•As example PBX 10 out/100, which means have 100 telephone lines for internal communication, out of these lines10 which are connected to external line.
•Also identified by backup battery for operating it for how many hours.


Overview On Telephone System

Hope this article was helpful for you :)