H - Electricity – 04 – M
Patent
H - Electricity
04
M
344/29
H04M 3/42 (2006.01) H04Q 11/06 (2006.01)
Patent
CA 1263728
AN ARRANGEMENT FOR TRANSFERRING DATA TO A CENTREX ABSTRACT OF THE INVENTION An arrangement for transmitting data messages between a remotely located attendant console and a CENTREX equipped central office exchange. The arrangement includes an operating unit residing in an interface circuit connected between the attendant console and the central office exchange. The operating unit of the present invention includes receiving means connected to the attendant console and to controller means. The receiving means is arranged to receive a data message from the attendant console and set a receive signal. A state machine means called by the controller means transfers the first byte of the data message to temporary memory means and resets the receive signal. The state machine means accepts all additional characters from the receiving means storing the received characters in the memory means until a character sequence is received indicating the end of the data message. When a complete data message is received an analysis means is called by the controller means which analyzes the received data message. Sequential memory means receives and stores the data message from the memory means responsive to the analysis concluding that the data message is for the peripheral processor. The controller means then sends a control signal to the CENTREX via the sense field indicating a data message has been stored in the sequential memory and is available for transfer.
525480
Gte Communication Systems Corporation
R. William Wray & Associates
LandOfFree
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