transponder
Sign in to savethumb|right|120px|An Ontario Highway 407 toll transponder circa 2009
Article
12 sectionsContents
- Satellite/broadcast communications
- Optical communications
- Aviation
- Marine
- Other applications
- Electronic toll collection
- Lap timing
- Car keys
- Gated communities
- See also
- References
- External links
thumb|right|120px|An Ontario Highway 407 toll transponder circa 2009
In telecommunications, a transponder is a device that, upon receiving a signal, emits a different signal in response. The term is a blend of transmitter and responder.