Telecommunication II.

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Chapter Eight: The Telephone System

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Presentation transcript:

Telecommunication II

Review On-hook position Off-hook position ON/OFF Hook Switch RJ-11 Subscriber/local loop Twisted pair Two-wire/Four-wire Hybrid Advantages of DTMF dialing

Telephony Fundamentals Basic Telecommunication Network

Telephony Fundamentals Distribution Point (D.P.) Distribution Cabinet (D.C.)

Telephony Fundamentals Telephone Exchange The main task of the telephone exchange is to build up a physical connection between subscriber A, the one who initiates the call, and subscriber B according to signaling information dialed by subscriber A Stored Program Control (SPC) Exchange

Telephony Fundamentals Main components of a digital exchange BORSCHT

Telephony Fundamentals PCM-30/E1 Frame What is PCM 30 transmission rate?

Telephony Fundamentals Switching network has incoming and outgoing E1 links A system that switches according to the fed requirements The system should be capable of switching any 8-bit code from any incoming highway to any time-slot on any outgoing highway (link) every 125 micro seconds Each time-slot in a PCM frame belongs to a particular subscriber