Telecommunication Systems

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Written by:

Manie N


Date added:

July 15, 2013








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3 / 655


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The difference between rotary and dual tone multi-frequency telephones is that rotary send interrupted electrical pulses and the DTMF is a method of instructing a telephone switching system. The main difference between the two types is that rotary is analog and DTMF is digital. A rotary type phone also is a mechanical switch type that uses clicks rather then tones...
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It is very easy to distinguish which type is which just by the appearance of the phone. I rotary phone will have a dial that you manually rotate clockwise to dial the numbers and a DTMF type phone will have push buttons. Wide Area Telecommunications Service or WATS is a line of service that is very similar to an 800 number...
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