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key telephone system


private telephone exchange


telephone system


local loop


key service unit


private branch exchange


Key Telephone System Experts

The following experts are available as key telephone system consultants and key telephone system expert witnesses.  ORC experts are peer-recommended authorities who have been carefully selected and rigorously screened.
    Definition:  Key Telephone System - A telephone system that is a private branch exchange (PBX) in which each telephone has several keys, several lines, and a relay switching apparatus. In a key telephone system, a telephone user can directly select an incoming or outgoing central office phone line by choosing a button on the phone itself, as opposed to requiring a special operator for handling incoming and outgoing calls. With this system, one does not need to dial "9" to make a call outside the building, unlike most PBXs.

Synonyms:  KSU system

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Expert in Voice Communications, Data Communications, PBX, VoIP, Voice over Internet Protocol
Telecommunication system; telecommunications system design; private branch exchange. Expert has over 35 years experience in the design, implementation and management of telecommunications systems and information networks. See full profile

California (CA), USA

Expert in Patent & Copyright Infringement, Depositions & Testify, Cell Phone Tracking, GPS, Cell Tower Records
Expert has consulted for law firms in California in connection with helping them write claims that provide the best patent coverage. He helps them in avoiding infringement by devising different technical approaches and novel ways to patent ideas ... See full profile

California (CA), USA

Expert in Integrated Business/Technology Planning, Strategic Planning, Small/Medium Business Analysis
Expert has a deep understanding of virtually all aspects of business development, including customer needs; operations efficiency and effectiveness. He has provided advice and counsel for numerous small businesses and has managed in-depth ... See full profile

California (CA), USA

Expert in Digital Communication Techniques
Encryption systems; cryptographic equipment; digital communication techniques. Expert has expertise in encryption systems and cryptographic equipment for transmitting secret messages, including the operation of various code-generating devices. See full profile

New York (NY), USA


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