Example image of eyePlorer eyePlorer map for 'Telephone': Human voice Sound Telecommunication Transmitter Developed country Longitudinal wave Signal (electronics) Electronics Fiber-optic communication Public switched telephone network Unicode Invention Alexander Graham Bell Antonio Meucci Elisha Gray Innocenzo Manzetti Johann Philipp Reis Thomas Edison United States Patent and Trademark Office Telephone exchange Tivadar Puskás Plain old telephone service Telephone line Twisted pair Fax Internet Telephone number Crosstalk (electronics) Electromagnetic interference Off-hook On-hook Calling party Loudspeaker Microphone Transceiver Direct current Ohm Volt Dial tone Dual-tone multi-frequency Pulse dialing Alternating current Ringtone Busy signal Call waiting Telephone call Digital Multiplex System Communications satellite Speakerphone Diaphragm (acoustics)
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