| 摘要 |
Systems and methods are descried for providing connectivity to portable electronic devices, such as a cordless telephone, for the purpose of upgradi ng software features. In a preferred embodiment, portable electronic devices ca n be connected to a conventional household audio player via an audio input/out interface in the device to receive encoded data signals modulated in an audi o band. The audio player can playback an audio signal stored in any of several different formats, including compact disc, audio cassette tape, MP3 file, or streaming audio, and can be physically connected an audio jack in the portab le electronic device via a conventional audio cable. The device demodulates and decodes the signal and routes the transmitted data to memory registers for upgrading software stored in device memory.
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