| 摘要 |
A wireless videophone (30) comprises a landline-based videophone (10), a transceiver (32), and a converter (34). The landline-based videophone has a two-wire communication path (24), wherein the two-wire communication path conducts an outgoing audio-video signal generated by the landline-based videophone. The transceiver has a four-wire communication path (36), wherein the four-wire communication path has a transmit path, a receive path, and a shared ground. The converter includes a transmit terminal (40) for applying a transmit signal to the transmit path, a receive terminal (44) for accepting a receive signal from the receiver path, and a common ground terminal (46) for coupling to the shared ground. The converter is responsive to the outgoing audio-video signal to provide the transmit original to the transmit, and is responsive to the receive original to provide the receive signal to the landline-based videophone. The converter can optionally have a call-exchange circuit (56) that identifies the telephone the call is intended. |
