| 摘要 |
A sign displays information upon a screen in a variable manner including "moving messages' which information, in an appropriate format to operate the display, is provided in digital form from a digital processor or computer. An operator possessing appropriate software installed in a remote digital device may alter the information displayed by input transmitted over wire or radio frequency to a single telephonic line operably connected to a modem through a data fax switch. Alternatively, a voice message received through the same telephonic line is routed by the data fax switch to an amplifier operably connected to at least one loudspeaker which may be incorporated into the construction of the sign along with the data fax switch and the screen. A programmable microprocessor directly controlling the screen may be included in the confines of the sign and receive digital signals directly from the data fax switch. The screen is remotely alterable as regards content of the information displayed with appropriate digital signal input through the same telephonic line as utilized for reception of audio or analog input for announcement through the amplifier and loudspeaker(s). This system primarily enables display of transportation arrival and other information as well as audio paging from a single moving message sign located in a waiting room with supply of a single telephonic line and standard electrical power supply. Remote alteration of the information by transportation personnel remotely, while en route, is enabled together with audio paging by both transportation personnel and the public, if desired, through utilization of a single telephonic line.
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