Data concentration interface for configuration of multiple TTY d

Details Data concentration interface for configuration of multiple TTY d Data concentration interface for configuration of multiple TTY d

1991-10-03

1993-07-06

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 941, 370 582, 395375, H04J 312, H04L 1256

Patent

active

052260402

ABSTRACT:
A communication system including one or more host adapters connected to a host computer, each adapter having multiple serial communication ports for transferring data between the computer and several TTY devices. Several of the adapter's serial ports include a high speed serial link for communicating with a data concentrator. The adapter automatically detects the presence of a concentrator connected to a switchable port and switches to the high speed link. Each concentrator includes multiple serial ports for communicating with TTY devices, and a high speed serial link for communicating with the adapter's high speed link. The concentrators allow more than one TTY device to share a single adapter serial port. Data from all of the TTY devices is accumulated into an adapter data buffer during a configurable time period or until a certain amount of data is accumulated, at which time the adapter interrupts the computer and transfers the accumulated data to the computer in one transfer operation.

REFERENCES:
patent: 4156798 (1979-05-01), Doelz
patent: 4787025 (1988-11-01), Cheselka et al.
patent: 5027344 (1991-06-01), Bellamy et al.
Donnan, R. A. and Kersey, J. R., Synchronous Data Link Control: A Perspective, IBM Systems Journal No. 2, pp. 140-162, 1974.

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