Telephone, deaf-aid

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OBJECT TYPE: Keyboard Send Receive (KSR)
DATE: 1980
ARTIFACT NUMBER: 2004.1329.001

MANUFACTURER: Northern Telecom Ltd.
MODEL: Visual Ear
LOCATION: Canada

More Information

General Information

Serial #: N/A
Part Number: 1
Total Parts: 2
AKA: N/A
Patents: N/A
General Description: synthetic caing, keys, parts/ rubber? couplers, feet/ metal parts

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length: 22.8 cm
Width: 20.0 cm
Height: 5.2 cm
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Medical Technology
Category: Assistive technologies
Sub-Category: N/A

Manufacturer

AKA: Northern Telecom
Country: Canada
State/Province: Unknown
City: Unknown

Context

Country: Canada
State/Province: Unknown
Period: Unknown
Canada: A Canadian made device developed by Bell Northern Research in cooperation with the Ontario Mission of the Deaf to replace the mechanical teleprinters used by the deaf for telephonic communication.
Function: A piece of equipment used by deaf and hard of hearing people to communicate via the normal telephone network.
Technical: Prior to TDD's, (Telecommunications Device for the Deaf), deaf and hard of hearing people communicated through the telephone network via teleprinters which used a coupler to convert DC baudot to FM audio tones. These tones were then converted into DC pulses to operate the teleprinter. The portable TDD made it possible for the deaf to use any phone (home, payphone etc) to communicate. The Visual Ear is a combination keyboard/alphanumeric display unit which couples acoustically to a telephone. The typed-in messages are encoded into a combination of tones compatible with the standard voiceband channel of a telephone network. It was designed to be compatible with the telephone network, teletypewriter systems in general, and the deaf people's teletypewriter network in particular (Ref. 2).
Area Notes: Unknown

Details

Markings: .1: BACK - '80240180P/ nt northern/ telecom/ NT0C50AB/ 09R/ MADE IN CANADA/ OCT 1982'/ DECAL: 'Communications/ Canada/ 332 082 A'/ FRONT - 'VISUAL EAR/ [STANDARD KEYBOARD]'/.2 SAME AS.1 EXCEPT: '8023006R' 'JUIN 1982'/ STICKER ON FRONT: 'GA= go ahead SK= sign off/ GA or SK= go ahead or sign off'/.4: 'DYNAMIC INSTRUMENT CORP./ CSA 380/ MADE IN U.S.A./ CAT. NO. 03D0001/ 120V. 10.0 VDC/ 60HZ 600 MA/ 12W'
Missing: N/A
Finish: .1 &.2 DARK BROWN SHINY BODY; BROWN & ORANGE KEYS WITH WHITE PRINTING; BLACK STRAP & PHONE REST/.3 BROWN WITH RED LINING/.4 BLACK WITH SILVER PRINTING
Decoration: N/A

CITE THIS OBJECT

If you choose to share our information about this collection object, please cite:

Northern Telecom Ltd., Telephone, deaf-aid, between 1980, Artifact no. 2004.1329, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/2004.1329.001/

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