Trimline telephone

TrimlineSignature TrimlineTrimline 220/222 Rotary phoneTrimline phone
The Trimline telephone is a series of telephones produced by Western Electric, the manufacturing unit of the Bell System, and first introduced in 1965.wikipedia
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Western Electric

Western Electric CompanyWestrexWestern Electric Manufacturing Company
The Trimline telephone is a series of telephones produced by Western Electric, the manufacturing unit of the Bell System, and first introduced in 1965.
Other innovations included the Princess telephones of the 1960s, followed shortly by the Trimline models.

Henry Dreyfuss

Henry Dreyfuss AssociatesDreyfussDreyfuss Associates
It was designed by Henry Dreyfuss Associates under the project direction of Donald Genaro; the firm had designed all previous desktop telephone models for the American Telephone & Telegraph conglomerate.

Princess telephone

PrincessPrincess phoneSignature Princess
After the introduction of the popular Princess telephone line, in 1959 and the early 1960s, the design motivation for the Trimline series was to create an alternative design that was stylish and easier to use than a traditional telephone.
The Trimline telephone is often confused with the Princess because the Trimline dial lights up, even though the dial on the Trimline is in the handset.

Donald Genaro

It was designed by Henry Dreyfuss Associates under the project direction of Donald Genaro; the firm had designed all previous desktop telephone models for the American Telephone & Telegraph conglomerate.
One of Genaro's most notable designs is the compact 1965 Trimline phone which was designed for AT&T with the Bell Labs and manufactured by Bell System's Western Electric company.

Advanced American Telephones

AT&T Consumer Products
In the 21st century, Advanced American Telephones produces the Trimline models 205, 210 (based upon original design), and the 265, under license from AT&T.
American Bell Consumer Products sold terminal equipment traditionally available through the Bell System, such as the Trimline telephone.

Registered jack

RJ11RJ-11RJ45
The Trimline was also one of the first phones to use the predecessor of the now-ubiquitous RJ11 modular phone plug and jack.
Some telephones such as the Western Electric Princess and Trimline telephone models require additional power (~6 V AC) for operation of the incandescent dial light.

Telephone

phonetelephonesLocal Telephone Service
The Trimline telephone is a series of telephones produced by Western Electric, the manufacturing unit of the Bell System, and first introduced in 1965.

Bell System

Bell Operating CompanyBell Operating CompaniesBell Telephone
The Trimline telephone is a series of telephones produced by Western Electric, the manufacturing unit of the Bell System, and first introduced in 1965.

AT&T Corporation

AT&TAmerican Telephone and Telegraph CompanyAmerican Telephone & Telegraph
It was designed by Henry Dreyfuss Associates under the project direction of Donald Genaro; the firm had designed all previous desktop telephone models for the American Telephone & Telegraph conglomerate.

In-ear monitor

earpiecein-ear monitorsin ear monitors
This was accomplished by moving the dial from the telephone's base to the underside of the handset, between the earpiece and mouthpiece.

Microphone

microphonescondenser microphonedynamic microphone
This was accomplished by moving the dial from the telephone's base to the underside of the handset, between the earpiece and mouthpiece.

Mobile phone

cell phonemobile phonesmobile
The same concept was later used for cellular telephone and cordless telephone models.

Cordless telephone

cordless phonecordless phonescordless telephones
The same concept was later used for cellular telephone and cordless telephone models.

Incandescent light bulb

incandescent lampfilamentincandescent light
The first Trimline models used incandescent dial lights powered by a power transformer plugged into a standard 120VAC outlet.

Transformer

power transformerelectrical transformerprimary winding
The first Trimline models used incandescent dial lights powered by a power transformer plugged into a standard 120VAC outlet.

Light-emitting diode

LEDLEDslight emitting diodes
Years later, Western Electric redesigned the Trimline to use a low-power green LED backlit dial powered by current from the phone line, eliminating the need for a separate transformer.

Dual-tone multi-frequency signaling

DTMFtouch-tonedual-tone multi-frequency
The Trimline handset was produced in both rotary dial and Touch-Tone versions.

Telephone company

telecommunications companytelephone companiestelco
Typically, the power on pins 2 and 5 came from a transformer plugged into a power outlet near one telephone jack, wired to supply power to just that telephone (or to all of the jacks in the house, depending on local telephone company practices).

Indianapolis

Indianapolis, IndianaIndianapolis, INIndianapolis, United States

Lucent

Lucent TechnologiesOctel CommunicationsLucent Technologies, Inc.

Philips

Philips ElectronicsRoyal Philips ElectronicsPhilips Media