JPS57147356A - Transmission control system - Google Patents

Transmission control system

Info

Publication number
JPS57147356A
JPS57147356A JP56032082A JP3208281A JPS57147356A JP S57147356 A JPS57147356 A JP S57147356A JP 56032082 A JP56032082 A JP 56032082A JP 3208281 A JP3208281 A JP 3208281A JP S57147356 A JPS57147356 A JP S57147356A
Authority
JP
Japan
Prior art keywords
circuit
speed
communication
processor
quality
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56032082A
Other languages
Japanese (ja)
Inventor
Hitoshi Toyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP56032082A priority Critical patent/JPS57147356A/en
Publication of JPS57147356A publication Critical patent/JPS57147356A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector

Abstract

PURPOSE:To improve the efficiency of communication by informing a data processor that the circuit quality of a communication circuit selected at a controller having a communication controller provided between the data processor and communication circuit does not meet requirements designated by the processor. CONSTITUTION:A controller, once informed of communication at a speed higher than an S2 by a data processor after a communication circuit is selected between the processor and a terminal equipment, discriminates whether the selected circuit is capable of communication at the speed by using a speed setting circuit 1 and a quality measuring circuit 2; when its circuit quality does not satisfy prescribed one, a speed reduction infication signal is sent from the quality measusing circuit 2 to the speed setting circuit 1 to reduce the speed of the circuit to a slow speed S2 and also to send information on the speed S1 to a comparing circuit 3. The circuit 3 compares the speed S1 with the reported S2 and, when S1<S2, sends NG information to the processor. When resetting and a communication speed higher than the S2 are indicated from the processor, whether communication is possible at a speed S3 or not is discriminated and when it is possible, the communication at the speed is started.
JP56032082A 1981-03-06 1981-03-06 Transmission control system Pending JPS57147356A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56032082A JPS57147356A (en) 1981-03-06 1981-03-06 Transmission control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56032082A JPS57147356A (en) 1981-03-06 1981-03-06 Transmission control system

Publications (1)

Publication Number Publication Date
JPS57147356A true JPS57147356A (en) 1982-09-11

Family

ID=12348949

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56032082A Pending JPS57147356A (en) 1981-03-06 1981-03-06 Transmission control system

Country Status (1)

Country Link
JP (1) JPS57147356A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61186041A (en) * 1985-02-14 1986-08-19 Yokogawa Hewlett Packard Ltd Data communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61186041A (en) * 1985-02-14 1986-08-19 Yokogawa Hewlett Packard Ltd Data communication system

Similar Documents

Publication Publication Date Title
JPS6468171A (en) Data processor
JPS52130219A (en) Transmission control system for call signal
JPS57147356A (en) Transmission control system
JPS5745769A (en) Control signal system for subscriber terminal connection
JPS54145450A (en) Data collection system
JPS5784645A (en) By-pass circuit
JPS5477040A (en) Data transmitter
JPS55147851A (en) Communication controlling system
JPS55124356A (en) Data transmission system
US4679228A (en) Speakerphone sensing circuit
JPS54133859A (en) Backing-up method of electronic computer system
JPS57183154A (en) Multispeed transmission system
JPS6429998A (en) Control system for river water level alarm
JPS53131706A (en) Automatic telephone exchange system
JPS5628530A (en) Terminal equipment in two-way data communication system having transmission signal level automatic control mechanism
JPS57119543A (en) Control station device
JPS57212849A (en) Polling transmission system
JPS5734261A (en) Occupation controlling system for common file
JPS5739646A (en) Interruption controlling system during communication
JPS5758442A (en) Communication controller
JPS5710833A (en) Communication controlling system
JPS5723142A (en) Test printing system of receiving printer
JPS5376704A (en) Facsimile equipment
JPS5755640A (en) Recognizing method for power failure of power source of subordinate station side by remote controller
JPS57119542A (en) Control station device