| 摘要 |
A supplementary hand free transceiver of a fixing network wired telephone installed to a wired telephone for providing to a non-built-in, non-amplified hand free transceiver is disclosed. The present invention has a hand free transceiver formed by a circuit box suitable for various telephones. No extension line is required and no original function is necessary to be changed. The original telephone can be added with a hand free function (no audio amplifying). Therefore, in using the telephone, the user's hands may operate freely. Furthermore, the receiver is not clamped in the neck portion so that the user may operate a telephone conveniently.
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