General Information

Serial #

802401804R (.1)

Part Number

1

Total Parts

4

AKA

N/A

Patents

N/A

General Description

SYNTHETIC/ METAL

Dimensions

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

Length

23.0 cm

Width

19.0 cm

Height

8.5 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

1981 THROUGH 1990

Canada

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/ MFG IN CANADA

Function

USED BY THE DEAF TO COMMUNICATE VIA THE NORMAL TELEPHONE NETWORK

Technical

PRIOR TO TDD'S, THE DEAF COMMUNICATED THROUGH THE TELEPHONE NETWORK VIA TELEPRINTERS WHICH USED A COUPLER TO CONVERT DC BAUDOT TOFM AUDIO TONES; THESE TONES WERE THEN CONVERTED INTO DC PULSES TO OPERATE THETELEPRINTER/ WITH THE PORTABLE TDD IT MADE IT POSSIBLE TO USE ANY PHONE (HOME, PAYPHONE ETC) TO COMMUNICATE

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

.1 & .2 BATTERY PACK

Finish

.1 &.2 DARK BROWN SHINY BODY; BROWN & ORANGE KEYS WITH WHITE PRINTING; BLACK STRAP & PHONE REST

Decoration

N/A