Connecting apparatus for interconnection between serial data tra

Details Connecting apparatus for interconnection between serial data tra Connecting apparatus for interconnection between serial data tra

1994-06-23

1996-09-10

Chin, Stephen

Pulse or digital communications

Transceivers

Transmission interface between two stations or terminals

375257, 375377, H04B 138, H04L 516

Patent

active

055555454

ABSTRACT:
A connecting apparatus for interconnection between serial data transmission devices, includes a DTE/DCE selector switch, a signal level converter, a single chip CMOS CPU and the RJ45 telephone bus cables, wherein the CPU controls the receiving and transmitting modes between the signal lines of the RS232 interface and the RJ45 telephone bus cables and also controls data transmission time so as to prevent the connected serial data transmission devices from sending out data at a time. The connecting apparatus can be connected with personal computers, serial printers, plotters or modems in series for data transmission to and from one another, and therefore jumper cables between either two data transmission devices are eliminated. Furthermore two connecting apparatus may be interconnected through RJ45 telephone bus cables, therefore it is easy to install and to expand data transmission devices.

REFERENCES:
patent: 4580239 (1986-04-01), Greenhill et al.
patent: 4670886 (1987-06-01), Newcombe, Jr. et al.
patent: 4686506 (1987-08-01), Farago
patent: 4852041 (1989-07-01), Nakano
patent: 4884287 (1989-11-01), Jones et al.
patent: 5331672 (1994-07-01), Evans et al.

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