초록 ▼

A fiber optics transceiver transmits and receives either synchronous or asynchronous data through a fiber optics data communication cable. The transceiver is connected to one end of the cable and communicates with an identical transceiver at the other end of the cable. The transceiver includes a tra

A fiber optics transceiver transmits and receives either synchronous or asynchronous data through a fiber optics data communication cable. The transceiver is connected to one end of the cable and communicates with an identical transceiver at the other end of the cable. The transceiver includes a transmitter for converting electrical digital data from a data source connected to the transmitter to optical flux for the cable. For asynchronous data, the flux comprises a train of positive-going pulses when the data is at a logical ONE, and a train of negaitve-going pulses when the data is at a logical ZERO. The train of pulses is interspaced at a fixed time interval and is restarted at each transition of the data between the logical ONE and logical ZERO state. For synchronous data, the flux comprises a train of positive-going pulses when the data is at a logical ONE, and a train of negative-going pulses when the data is at a logical ZERO. Each of the pulses in the train correspond to one transition of a clock waveform to which the data is synchronized. The transceiver also includes a receiver for converting optical flux from the cable to electrical digital data for data equipment connected to the receiver. For flux generated from asynchronous data, the receiver reconstructs the data. For flux generated from synchronous data, the receiver reconstructs both the data and the clock to which the data was synchronized. The transceiver also includes provisions for indicating the operationality of the data communications system formed by the two transceivers and the cable.

대표청구항 ▼

A fiber optics data transceiver for both transmitting and receiving either asynchronous or synchronous data through a fiber optics data communication cable, said transceiver being connected to one end of said cable and communicating with an identical transceiver at the other end of said cable and co

A fiber optics data transceiver for both transmitting and receiving either asynchronous or synchronous data through a fiber optics data communication cable, said transceiver being connected to one end of said cable and communicating with an identical transceiver at the other end of said cable and comprising: (a) transmitter means for converting digital data from a data source connected to said transmitter means to optical flux for said cable, said flux comprising: (i) for asynchronous data, a train of positive-going pulses when said data is at a logical ONE, and a train of negative-going pulses when said data is at a logical ZERO, said train of pulses being interspaced at a fixed time interval and being restarted at each transition of said data between said logical ONE and said logical ZERO; and (ii) for synchronous data, a train of positive-going pulses when said data is at a logical ONE, and a train of negative-going pulses when said data is at a logical ZERO, said pulses in said train each corresponding to a transition of a clock waveform to which said data is synchronized; (b) receiver means for converting said optical flux from said cable to digital data for a data sink connected to said receiver means, whereby, (i) for flux generated from said asynchronous data, said receiver means reconstructs said data; and (ii) for flux generated from said synchronous data, said receiver means reconstructs said data and said clock to which said data was synchronized; and (c) means for indicating the operationality of the data communications system formed by said two transceivers and said cable.