key telephone
71Meridian Norstar — The Meridian Norstar, later called Nortel Norstar was a small office digital PBX introduced by Northern Telecom (now Nortel). It is based on the same internal design and instruction set as Nortel s earlier SL 1 and DMS systems[dubious – discuss] …
72Iwatsu Electric — Infobox Company company name = Iwatsu Electric Co., Ltd. company type = Corporation tyo|6704 company foundation = Tokyo, Japan (1938) location = Tokyo, Japan key people = Yoshiyuki Ishibashi, President num employees = 543 (1,659 including… …
73Nortel — Networks Corporation Type Public OTC Markets Group: NRTLQ Industry Telecommunications …
74Centrex — This article is about the type of telephone exchange. For the British police training agency, see Centrex (police training agency). For the Gazprom related group of companies, see Centrex Europe Energy Gas AG. Typical standard phone used with… …
75Ringdown — Ringdown: In telephony, a method of signaling an operator in which telephone ringing current is sent over the line to operate a lamp or cause the operation of a self locking relay known as a drop . Ringdown (a) is used in manual operation, as… …
76AT&T Merlin — 5 button telephone (voice terminal) manufactured in early 1985 The AT T (also Lucent, now Avaya) Merlin telephone system was introduced in late 1983, branded American Bell Merlin. After the breakup of AT T in 1984, it was rebranded AT T Merlin.… …
77Unified communications — (UC) is the integration of real time communication services such as instant messaging (chat), presence information, telephony (including IP telephony), video conferencing, data sharing (including web connected electronic whiteboards aka IWB s or… …
78Wink pulsing — Wink is used both in connection with DC signaling on a trunk, and with indicator lamps on a key telephone.In telephone switching systems, wink pulsing is recurring pulsing in which the off condition is relatively short compared to the on… …
79RJ21 — RJ 21 (or RJ21) is a registered jack standard for a modular connector using 50 conductors, usually used to implement a 25 line (or less) telephone connection such as that used in the 1A2 key telephone system. It is also known as a 50 pin telco… …
80AT&T Technologies — AT T Technologies, Inc., was created in 1983 in preparation for the Bell System Divestiture, which became effective as of January 1, 1984. It assumed the corporate charter of Western Electric Co., Inc.HistoryCreationAT T, after divesting… …
