Abstract
A speakerphone instrument is disclosed having a remote microphone unit providing infrared radiation carrier transmission of voice to a base station coupled to a telephone line. Voice controlled switching of the infrared carrier may be utilized to reduce power consumption. A local microphone in the base station is operable during periods when the remote microphone unit is not transmitting or if the signal-to-noise ratio of the infrared carrier becomes unsatisfactory for voice communication, to pick-up ambient sound and make available a microphone signal for transmission over the telephone line.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
