Arrangement for transferring data to an attendant console

Abstract

An arrangement for transmitting data messages between a CENTREX equipped central office exchange and a remotely located attendant console. The arrangement includes an operating unit residing in an interface circuit connected between the CENTREX and the attendant console. The operating unit includes sequential memory connected to the CENTREX and to a controller arranged to receive and store data message from the CENTREX. The CENTREX sends a data available signal to the controller signaling that a data message is available for transfer from the sequential memory. In response, the controller sends the CENTREX a sequential memory read control signal signaling that the controller is reading the sequential memory. State machine called by the controller transfers a first byte of the data message from the sequential memory to temporary memory. The state machine accepts all additional characters from the sequential memory and stores the characters in the temporary memory until an end of data message character sequence is received. An analysis is then called by the controller which ascertains the data messages destination. Sending circuitry connected to the attendant console and to the controller transmits the data message to the attendant console. The transmission of the data messages is terminated by the controller by resetting the sequential memory read control signal in response to the CENTREX resetting the data available signal. This signals the CENTREX that the transmission is complete.