General Concepts 6 min read
Essential Concepts In Transmission
Introduction In this section we discuss two-wire and four-wire transmission and two impairments that are commonly caused by two-wire-to-four-wire conversion…
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General Concepts 4 min read
Introductory Switching Concepts
All local telephone switches have, as a minimum, three functional elements: concentration, distribution, and expansion. Concentration and expansion were discussed…
General Concepts 3 min read
The Essential Functions of a Local Switch
As we mentioned above, means are provided in a local switch to connect each subscriber line to any other in…
General Concepts 4 min read
Introduction To Switching
In this section our concern is telephone switching, the switching of voice channels. We will deal with some switching concepts…
General Concepts 5 min read
Transmission And Switching: Cornerstones Of A Network
Transmission And Switching Defined The IEEE defines transmission as the propagation of a signal, message, or other form of intelligence…
General Concepts 3 min read
Level
Level is an important parameter in the telecommunications network, particularly in the analog network or in the analog portion of…
General Concepts 4 min read
Voice Transmission
Loudness Rating and Its Predecessor Historically, on telephone connections, the complaint has been that at the receiving telephone the distant…
General Concepts 2 min read
Quality Of Service And Telecommunication Impairments
OBJECTIVE Quality of service (QoS) was introduced in Section 1.4. In this chapter we will be more definitive in several…
General Concepts 3 min read
Radio Transmission
Up to now we have discussed guided transmission. The signal is guided or conducted down some sort of a “pipe.”…
General Concepts 4 min read
Coaxial Cable Transmission
Up to this point we have been discussing two parallel conductors, namely, wire pair. An entirely different configuration of two…
