Subjects:
Telecommunications is the electronic sharing of information. The information shared may take the forms of audio, data, or video. Technologies for communicating information include traditional telephones, wireless cellular technologies, and networked computers. This paper will cover highlights of historical telecommunications technologies, present telecommunications systems, and future telecommunications technologies.
Telecommunications spans diverse physical media and transmission protocols. This section presents currently used technologies. Advantages and disadvantages of each technology are described in detail. Table 3 shows the comparative bandwidth available for each of these technologies, ranging from 56 kbps to 100 Mbps.
Table 3. COMPARATIVE BANDWIDTHS. This table summarizes approximate theoretical data bandwidths, as gathered from the references. These numbers should not be taken as absolutes; the following text should supplement the numbers.
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SMDS provides data rates from 56 kbps up to 34 Mbps. [Henderson, 70]
Where voice was historically an application of WAN, today it is becoming more of a LAN application due to ATM due to its broadcast approach (http://www.
"SMDS Any-to-Any Connectivity Service. The POTS telephone system converts analog (voice) signals to digital signals and then back to analog signals again. [Clarkson, 111]
ATM has been making inroads as a WAN technology but is still quite expensive. Once a transmitter has finished sending data, it generates a new token on the network for other nodes to use. The digital format used by the telephone company is connected directly to a service provider. When there is only one analog to digital conversion in the transmission, 56 kbps is achievable. This leads to a competitive industry where only the best marketed and functional telecommunications changes survive.
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