JPS55153448A - Data communication system - Google Patents

Data communication system

Info

Publication number
JPS55153448A
JPS55153448A JP4645779A JP4645779A JPS55153448A JP S55153448 A JPS55153448 A JP S55153448A JP 4645779 A JP4645779 A JP 4645779A JP 4645779 A JP4645779 A JP 4645779A JP S55153448 A JPS55153448 A JP S55153448A
Authority
JP
Japan
Prior art keywords
data
level
reception
detected
transmission
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.)
Granted
Application number
JP4645779A
Other languages
Japanese (ja)
Other versions
JPS5943021B2 (en
Inventor
Ryuichiro Oota
Minoru Iwata
Masaharu Narato
Takeshi Hayashi
Nobuyoshi Maeda
Toshiharu Kakehi
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 JP54046457A priority Critical patent/JPS5943021B2/en
Publication of JPS55153448A publication Critical patent/JPS55153448A/en
Publication of JPS5943021B2 publication Critical patent/JPS5943021B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/12—Compensating for variations in line impedance

Abstract

PURPOSE:To make easy to set a suitable level, by transmitting the check data to the reception side prior to the data to be transferred. CONSTITUTION:The check data CD (five types of fixed data a-e and the transmission level is changed to l1-l5 in step) are transmitted from the transmission side in the timing levels t0-t4, and the transmission data TD are transmitted in a given level l3 after the timing t5 (a). Next, only the level in the area DA is detected as the reception data at the reception side, and at the normal reception (b), although all the data a-e in CD are detected, the line loss is greater and when the level of the reception data is as shown in (c), the data a and b are not detected. Accordingly, in this case, it is outputted to the printer that the detection can be made only to the data of the level l2. Thus, when the operator observes this and informs it on telephone set to increase the transmission level only if the data having the digit in which no TD is detected is present, it allows normal reception.
JP54046457A 1979-04-16 1979-04-16 data communication system Expired JPS5943021B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54046457A JPS5943021B2 (en) 1979-04-16 1979-04-16 data communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54046457A JPS5943021B2 (en) 1979-04-16 1979-04-16 data communication system

Publications (2)

Publication Number Publication Date
JPS55153448A true JPS55153448A (en) 1980-11-29
JPS5943021B2 JPS5943021B2 (en) 1984-10-19

Family

ID=12747683

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54046457A Expired JPS5943021B2 (en) 1979-04-16 1979-04-16 data communication system

Country Status (1)

Country Link
JP (1) JPS5943021B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005167731A (en) * 2003-12-03 2005-06-23 Sumitomo Electric Ind Ltd Communication method, communication system, communication circuit, and communication apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5485216B2 (en) * 2011-04-01 2014-05-07 ポリプラスチックス株式会社 Planar connector
JP5546081B2 (en) * 2011-04-01 2014-07-09 ポリプラスチックス株式会社 Totally aromatic polyester and polyester resin composition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005167731A (en) * 2003-12-03 2005-06-23 Sumitomo Electric Ind Ltd Communication method, communication system, communication circuit, and communication apparatus

Also Published As

Publication number Publication date
JPS5943021B2 (en) 1984-10-19

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