| 摘要 |
A method and apparatus for communicating information with a user via electromagnetic radiation. The information can be communicated to or from an electronic device in accordance with a plurality of protocols to provide a plurality of services for the user. The apparatus can operate with any conventional modulation (analog or digital) and in accordance with at least one of the plurality of protocols. If the user is a person, the services can include providing audio or tone signals (142). If the user is a device, the services can include providing audio, tone, or data signals (134, 142, 148). The electronic device is a receiver, a transmitter, or a transceiver.
|
