Modem
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1995.1006.001
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- OBJECT TYPE
- ASYNCHRONOUS
- DATE
- 1980
- ARTIFACT NUMBER
- 1995.1006.001
- MANUFACTURER
- Gandalf Data Communications Ltd.
- MODEL
- VAX 11/750 (N)/ LDS 140
- LOCATION
- Ottawa, Ontario, Canada
More Information
General Information
- Serial #
- 2933
- Part Number
- 1
- Total Parts
- 1
- AKA
- N/A
- Patents
- N/A
- General Description
- METAL CASING & PARTS/ SYNTHETIC CONTROLS, POWER CORD/ GLASS INDICATOR LIGHTS
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 29.5 cm
- Width
- 18.4 cm
- Height
- 9.5 cm
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Computing Technology
- Category
- Digital peripheral devices
- Sub-Category
- N/A
Manufacturer
- AKA
- Gandalf
- Country
- Canada
- State/Province
- Ontario
- City
- Ottawa
Context
- Country
- Canada
- State/Province
- Ontario
- Period
- 1980S & EARLY 1990S
- Canada
-
Gandalf, founded in Ottawa in 1971, displayed the LDS-140 at the annual meeting of the International Communications Association in Las Vegas in1978. It's price was $450 (USD). This particular example was the modem for the computer system used by the National Museum of Science and Technolgy from 1981 to the mid-1990s. Succeeding the PDP-11/34A (used from 1978), the VAX system was located in the computer exhibit, where it operated games and interactives. It also supported all administrative and collections management functions. - Function
-
A device that enables data to be transmitted between computing devices using existing telephone lines. This example was used to link a superminicomputer to personal computers in several adjacent buildings so the latter could be used as terminals. - Technical
-
Example of an asynchronous modem used in a local area network. According to a report in Computerworld (May 22, 1978), the LDS-140 was a four-wire, full-duplex unit that could transmit data up to 19.2 km on loaded telephone lines (wire pairs) at 4,800 bits per second; on unloaded lines it could transmit up to 9.6 km at 9,600 bits per second. - Area Notes
-
Unknown
Details
- Markings
- WHITE LETTERING ON FRONT READS "gandalf LDS 140"/ LABELS ON BACK READ "LDS 140/ LR 29473/ 115V 60Hz 10W/ gandalf/ DATA COMMUNICATIONS LTD." & "S.N. 2933"/ WHITE LETTERING FOR CONTROL FUNCTIONS ON FRONT & BACK
- Missing
- APPEARS COMPLETE
- Finish
- TEXTURED BLUE PAINTED FINISH ON CASING/ BLACK ENAMEL PAINTED FRONT & BACK PANELS/ BLACK & WHITE SYNTHETIC PARTS/ GREY POWER CORD/ RED LIGHTS/ BLACK FEET
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Gandalf Data Communications Ltd., Modem, circa 1980, Artifact no. 1995.1006, Ingenium – Canada’s Museums of Science and Innovation, http://collections.ingeniumcanada.org/en/id/1995.1006.001/
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