JPS544510A - Combined trunk system between two wires and four wires - Google Patents

Combined trunk system between two wires and four wires

Info

Publication number
JPS544510A
JPS544510A JP6948777A JP6948777A JPS544510A JP S544510 A JPS544510 A JP S544510A JP 6948777 A JP6948777 A JP 6948777A JP 6948777 A JP6948777 A JP 6948777A JP S544510 A JPS544510 A JP S544510A
Authority
JP
Japan
Prior art keywords
wires
trunk system
combined trunk
program control
wire trunk
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
JP6948777A
Other languages
Japanese (ja)
Inventor
Makoto Hisamura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6948777A priority Critical patent/JPS544510A/en
Publication of JPS544510A publication Critical patent/JPS544510A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To reduce the processing capacity of a relay processor and to simplify program control,by enabling an information detection realy to detect the connection via network only when connecting one four-wire trunk to another four-wire trunk in a program control switching unit.
COPYRIGHT: (C)1979,JPO&Japio
JP6948777A 1977-06-14 1977-06-14 Combined trunk system between two wires and four wires Pending JPS544510A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6948777A JPS544510A (en) 1977-06-14 1977-06-14 Combined trunk system between two wires and four wires

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6948777A JPS544510A (en) 1977-06-14 1977-06-14 Combined trunk system between two wires and four wires

Publications (1)

Publication Number Publication Date
JPS544510A true JPS544510A (en) 1979-01-13

Family

ID=13404101

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6948777A Pending JPS544510A (en) 1977-06-14 1977-06-14 Combined trunk system between two wires and four wires

Country Status (1)

Country Link
JP (1) JPS544510A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4598172A (en) * 1983-01-19 1986-07-01 Telefonaktiebolaget Lm Ericsson Telecommunication terminal
US5414763A (en) * 1991-04-09 1995-05-09 Canon Kabushiki Kaisha Apparatus and method for providing echo suppression to a plurality of telephones

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4598172A (en) * 1983-01-19 1986-07-01 Telefonaktiebolaget Lm Ericsson Telecommunication terminal
US5414763A (en) * 1991-04-09 1995-05-09 Canon Kabushiki Kaisha Apparatus and method for providing echo suppression to a plurality of telephones

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