Method for intelligent data terminal equipment (DTE) data communication

• US 5,633,890 A
• Filed: 02/24/1994
• Issued: 05/27/1997
• Est. Priority Date: 02/24/1994
• Status: Expired due to Term

• Current Assignee: Ricoh Company Limited, Ricoh Corporation (Ricoh Company Limited)
• Original Assignee: Ricoh Company Limited, Ricoh Corporation (Ricoh Company Limited)
• Inventors: Ahmed, Allam Z.
• Primary Examiner(s): Coles, Sr., Edward L.
• Assistant Examiner(s): NGUYEN, ANH-VINH THI
• Application Number:
  US08/201,398
• Time in Patent Office: 1,188 Days
• Field of Search: 375/219, 375/377, 375/299, 375/220, 375/221, 375/222, 375/369, 395/325, 395/821-833, 395/825, 358/434, 358/435, 358/436, 358/438, 358/400, 358/402, 358/442, 379/100, 370/49
• US Class Current: 375/219
• CPC Class Codes: G06F 13/385 for adaptation of a particular data processing system to different peripheral devices
• CPC Class Codes: H04L 69/323 in the physical layer [OSI layer 1]

Abstract

Method for two-way digital communication between Data Terminal Equipment (DTE) and Data Communication Equipment (DCE), includes a novel command set. The inventive method involves initiating communication by transmitting one command from a set of DTE commands to the command interpreter block. That block interprets the command, and acts on the command, directing the command to the appropriate control block. The control block receiving the decoded command then executes the command by sending a signal representative of the command to a hardware interface device which transmits the signal to the receiving DCE.

Claims

1. In a data terminal equipment (DTE) device including, in intercommunication, a command interpreter block and a plurality of control blocks in communication with a digital communication equipment (DCE) device, a method of digital communication between the devices, comprising the steps of:

A. initiating the digital communication by transmitting within the DTE one command from a DTE command set to the command interpreter block, the DTE command set having no field reserved for data that is to be transmitted to another DTE;

B. decoding the command;

C. directing the decoded command from the command interpreter to one of the control blocks;

D. converting the decoded command into a signal representative of the decoded command; and

E. transmitting the signal from the control block to the DCE.

2. The method of claim 1, wherein the DTE command set includes one command from the group consisting of:

track or ignore clear to send (CTS) signal;

respond to flow control schemes;

track or ignore ring indicator (RI) signal;

track or ignore carrier detect (DCD) signal;

set up DTE to either sync or async operation mode;

track or ignore dataset ready (DSR) signal;

set up DTE to dumb terminal mode; and

reset DTE parameters.

3. The method of claim 1, wherein the DTE further comprises a hardware interface device, the method further comprising, after the step of converting the decoded command, transmitting the signal from the control block to the hardware interface device.

4. The method of claim 2, wherein the command interpreter and the control blocks reside in a single memory device within the DTE and the control blocks include one from the group of blocks consisting of:

data flow control;

mode set-up sync/async; and

line control.

5. The method of claim 1, wherein the DTE command set includes one command from the group consisting of:

(i) track or ignore clear-to-send (CTS) signal, (ii) track or ignore ring indicator (RI) signal, (iii) track or ignore data carrier detect (DCD) signal, and (iv) track or ignore dataset ready (DSR) signal.

6. The method of claim 5, wherein the DTE command set further includes one command from the group consisting of:

(i) respond to flow control schemes, (ii) set up DTE to either synchronous or asynchronous operation mode;

(iii) set up DTE to dumb terminal mode, and (iv) reset DTE parameters.

7. The method of claim 6, wherein the DTE command set further includes one command from the group consisting of:

(i) change state of data terminal ready (DTR) signal, and (ii) change state of request-to-send (RTS) signal.

8. In a data terminal equipment (DTE) device including, in intercommunication, a command interpreter block and a plurality of control blocks within a single memory device, and a hardware interface device in communication with a digital communication equipment (DCE) device, a method comprising the steps of:

A. transmitting within the DTE one command from a DTE command set to the command interpreter block, the DTE command set having no field reserved for data that is to be transmitted to another DTE;

B. decoding the command in the command interpreter block;

C. directing the decoded command from the command interpreter to one of the control blocks, the plurality of control blocks comprising;

a data flow control block,

a mode set-up sync/async block, and

a line control block;

D. converting the decoded command in the control block into a signal representative of the decoded command; and

E. transmitting the signal from the control block to the hardware interface device.

9. The method of claim 8, wherein the DTE command set comprises (i) track or ignore clear-to-send (CTS) signal, (ii) track or ignore ring indicator (RI) signal, (iii) track or ignore data carrier detect (DCD) signal, and (iv) track or ignore dataset ready (DSR) signal.

10. The method of claim 8, wherein the DTE command set comprises (i) respond to flow control schemes, (ii) set up DTE to either synchronous or asynchronous operation mode;

(iii) set up DTE to dumb terminal mode, and (iv) reset DTE parameters.

11. The method of claim 8, wherein the DTE command set comprises (i) change state of data terminal ready (DTR) signal, and (ii) change state of request-to-send (RTS) signal.

12. The method of claim 9, wherein the DTE command set further comprises (i) respond to flow control schemes, (ii) set up DTE to either synchronous or asynchronous operation mode;

(iii) set up DTE to dumb terminal mode, and (iv) reset DTE parameters.

13. The method of claim 12, wherein the DTE command set further comprises (i) change state of data terminal ready (DTR) signal, and (ii) change state of request-to-send (RTS) signal.