Modem sharer
First Claim
1. A modem sharer for connecting a plurality of remote terminals to a modem in a polled teleprocessing network, the modem sharer comprising:
- a plurality of request to send inputs for receiving signals from respective terminals when ready to transmit information;
a plurality of transmitted data inputs for receiving the data to be transmitted from the respective terminals;
request to send output means for associating with said modem and for transmitting a signal to said modem when a terminal provides an input signal to a request to send input;
a transmitted data output for transmitting data from each of said terminals to said modem;
a clear to send input for receiving a signal from said modem indicating that said modem is ready to send data, and for enabling the transmission of data from a terminal to said modem from a transmitted data input to a transmitted data output; and
timer means for disenabling the transmission of data from a terminal to said modem after a predetermined time from the initiation of a signal on a request to send input.
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Accused Products
Abstract
A modem sharer for interconnecting a plurality of remote terminals with a modem for the transmission of data between the terminals and the modem. The modem sharer includes a request to send circuit having a timer, a data transmission gating circuit, and a clear to send circuit. The raising of a request to send signal at a selected terminal actuates the timer and initiates signal transmission if cleared for transmission. Transmission is interrupted if not completed within a preset time set into the timer. Then, remaining terminals are free to transmit. LED displays indicate modem sharer operation, including an offending terminal which is not transmitting properly. The modem sharer is short circuit protected, and is capable of operating in a piggyback array.
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Citations
13 Claims
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1. A modem sharer for connecting a plurality of remote terminals to a modem in a polled teleprocessing network, the modem sharer comprising:
- a plurality of request to send inputs for receiving signals from respective terminals when ready to transmit information;
a plurality of transmitted data inputs for receiving the data to be transmitted from the respective terminals;
request to send output means for associating with said modem and for transmitting a signal to said modem when a terminal provides an input signal to a request to send input;
a transmitted data output for transmitting data from each of said terminals to said modem;
a clear to send input for receiving a signal from said modem indicating that said modem is ready to send data, and for enabling the transmission of data from a terminal to said modem from a transmitted data input to a transmitted data output; and
timer means for disenabling the transmission of data from a terminal to said modem after a predetermined time from the initiation of a signal on a request to send input. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- a plurality of request to send inputs for receiving signals from respective terminals when ready to transmit information;
Specification