Voice and data communications handbook
Written from a user friendly perspective in non-technical language and based on the successful Data-Tech Institute seminar, this is the most comprehensive, up-to-date reference on all aspects of voice and data communications available. The handbook will be of value to communications professionals who need this knowledge to meet the requirements of proliferating PC/LAN networks.
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The History of Telecommunications cl
The Telephone Network
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allow analog applications architecture AT&T bandwidth baseband Bell Bell System beneﬁts bits broadband bytes cable caller carriers CCITT cell cellular central ofﬁce Centrex channel Chapter circuit conﬁguration connection cost data communications deﬁned designed device dial tone dial-up electrical end user equipment error Ethernet FDDI ﬁber ﬁle ﬁrst ﬁxed ﬂow frame relay frequency function industry installed interface ISDN Kbps layer Mbits/s Mbps modem multiple multiplexing node operator organization OSI model packet switching problem protocol pulse receiver server shown in Figure signal signiﬁcant single slots SMDS speciﬁc speed standard Table technique telco telecommunications telephone company telephone set terminal throughput time-division multiplexing tion Token Ring topology trafﬁc transmission transmit twisted pair typically vendors video conferencing voice wires