Automatic mode switching unit for a serial communications data s

Details Automatic mode switching unit for a serial communications data s Automatic mode switching unit for a serial communications data s

1985-11-07

1987-12-15

Smith, Jerry

Excavating

371 11, 364900, G06F 1120

Patent

active

047138114

ABSTRACT:
An automatic switching unit for use in combination with a backup processor and a series communications system such as for a retail store operation, and where the series communications system includes a controller having multiple serial ports, each port being connected in a series loop with a plurality of data terminals for registering sales transactions. The switching unit includes a monitor for monitoring each of the series loops to detect the malfunction of any port, and also includes a switching network. When the monitor detects a malfunction of any port, the switching network automatically connects the backup processor and all the data terminals in those loops associated with serial ports detected to be malfunctioning in a single series loop, and automatically disconnects the malfunctioning ports from the single series loop. In this way the backup processor is automatically substituted for the malfunctioning ports, and all the data terminals that had been connected to one or more series loops with the malfunctioning ports are automatically connected in a single series loop with the backup processor.

REFERENCES:
patent: Re28958 (1976-09-01), Zafiropulo
patent: 4035770 (1977-07-01), Sarle
patent: 4255741 (1981-03-01), Peterson
patent: 4347564 (1982-08-01), Sugano
patent: 4374436 (1983-02-01), Armstrong
patent: 4542479 (1985-09-01), Kamimura
patent: 4596982 (1986-06-01), Bahr

Affiliated with

Also associated with

Rating

Automatic mode switching unit for a serial communications data s does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic mode switching unit for a serial communications data s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic mode switching unit for a serial communications data s will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1224595