US 4,384,307 A · Facsimile communications interface adapter

Abstract

A communications adapter for interfacing a transceiver and a line including a synchronous receiver-transmitter programmed by a controller to operate the receiver-transmitter in different data formats during a single frame transmission to or reception from a transmitter/receiver and including logic programmed by a controller for controlling the operation of a transmitter/receiver on a bit level to halt the transmitter/receiver during programming changes of format between and during a frame. For frame transmission to a transmitter/receiver, the receiver-transmitter is programmed for a first portion of a frame for a number of bits per character as a function of transmitter/receiver and line protocol and for second portion of a frame for a number of bits per character as a function of line protocol. For frame reception from a transmitter/receiver, the receiver-transmitter is programmed for a number of bits per character as a function of line protocol and a synchronization pattern as a function of line and transmitter/receiver protocol.

Claims21

Dependent claims

In a communications adapter for interfacing a facsimile transceiver with a communications line comprising controller means for controlling the operation of the adapter, storage means for storing instruction and data to be used by said controller means, facsimile input-output port, a line input-output port, and logic means controlled by said control means for interfacing said facsimile and line ports, the improvement being said logic means which comprises:

a receiver/transmitter means programmable by said controller means for interfacing said facsimile and line ports;
synchronization means programmable by said controller and responsive to signals from said receiver/transmitter means for providing a signal to coordinate the transmission and reception of a facsimile transmitter/receiver on said facsimile port with the interface adapter on the bit level;
and
said storage means including instructions to program said receiver/transmitter means and said synchronization means.

1 more element

A communications adapter for interfacing a transmitter/receiver and a line comprising:

a transmitter/receiver port;
a line port;
a programmable synchronous receiver/transmitter means for interfacing the protocol of said line and transmitter/receiver ports;
programmable logic means responsive to signal from said receiver-transmitter means for enabling the operation of a transceiver on said transmitter/receiver;
storage means for storing instructions and data;
and
controller means interconnected to said receiver/transmitter means, logic means and storage means for programming said receiver/transmitter means to operate in a first data format for a first portion of a frame transmission to said transceiver port and a second data format for a second portion of a frame transmission to said transmitter/receiver port and for programming said logic means to halt operation of a transmitter/receiver on said transmitter/receiver port during programming of said receiver/transmitter means.

4 more elements

A communications adapter for interfacing a transmitter/receiver and a line comprising:

a line port;
a transmitter/receiver port;
a programmable synchronous receiver/transmitter means for interfacing the protocol of said line and transmitter/receiver ports;
programmable logic means responsive to signals from said receiver/transmitter means for enabling the operations of a transmitter/receiver on said transmitter/receiver port;
storage means for storing instructions;
and
controller means interconnected to said receiver/transmitter means, logic means and storage means for programming said receiver/transmitter means to operate in a first data format for transmission of a frame to said transmitter/receiver port and in a second data format for reception of a frame from said transmitter/receiver port, and for programming said logic means to halt operation of a transmitter/receiver on said transmitter/receiver port during programming of said receiver/transmitter means.

4 more elements

Dependencies are inferred from the claim text.

Facsimile communications interface adapter

Life of this patent

Facsimile communications interface adapter

Life of this patent

Abstract

Claims21