Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer

Early geosynchronous satellites, orbiting more than 35,000 kilometers (22,000 miles) above the Earth, faced a problem: a voice signal traveling from Earth to a satellite and back developed an echo, making phone conversation difficult. In the early 1970s, COMSAT Laboratories developed an "echo canceller" to correct this problem. This invention made communications via satellite similar in quality to local telephone calls and enhanced public acceptance of the new technology.

COMSAT Laboratories donated this artifact to the Museum in 1999.

 Display Status

This object is on display in One World Connected at the National Air and Space Museum in Washington, DC.

One World Connected
Object Details
Country of Origin United States of America Type EQUIPMENT-Communications Devices Manufacturer COMSAT Laboratories
 Dimensions 3-D (5k): 48.3 × 17.8 × 12.7cm (1 ft. 7 in. × 7 in. × 5 in.)
3-D: 5kg (11lb.)
 Materials Aluminum
Ferrous Alloy
Plastics
Paper
Ink
Adhesive
Paint
Copper Alloy
Electronic Components
 Inventory Number A19990146000 Credit Line Gift of COMSAT Laboratories. Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
For more information, visit the Smithsonians Terms of Use.