Multiplex transmission apparatus

Details Multiplex transmission apparatus Multiplex transmission apparatus

1995-04-06

1996-04-30

Kizou, Hassan

Multiplex communications

Wide area network

Packet switching

370 851, 455343, 34082516, H04J 314, H04L 1240

Patent

active

055131751

ABSTRACT:
A multiplex transmission apparatus includes a communication control circuit, which monitors data output from an output port and which changes the state of the output port to a predetermined specific state when at least part of the monitored data fails to show a predetermined periodic change with respect to corresponding data previously output, and is operated by a power supply voltage applied thereto from a power circuit to carry out data communications with other multiplex transmission apparatuses. A communication IC maintains the operating state of or resets the output port and the communication control circuit of the multiplex transmission apparatus in accordance with the result of detection by a low-voltage detecting circuit, and a gate circuit inhibits the output port from being changed to the specific state by a timer IC when low voltage is detected or during sleep mode.

REFERENCES:
patent: 4907222 (1990-03-01), Slavik
patent: 4942571 (1990-07-01), Moller et al.
patent: 4987317 (1991-01-01), Pournain et al.
patent: 5251211 (1993-10-01), Mutoh et al.

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