JPS55137758A - Extension telephone set connection switching system - Google Patents

Extension telephone set connection switching system

Info

Publication number
JPS55137758A
JPS55137758A JP4574679A JP4574679A JPS55137758A JP S55137758 A JPS55137758 A JP S55137758A JP 4574679 A JP4574679 A JP 4574679A JP 4574679 A JP4574679 A JP 4574679A JP S55137758 A JPS55137758 A JP S55137758A
Authority
JP
Japan
Prior art keywords
extension
telephone set
connection switching
iot
extension telephone
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
JP4574679A
Other languages
English (en)
Inventor
Shinji Kubo
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4574679A priority Critical patent/JPS55137758A/ja
Publication of JPS55137758A publication Critical patent/JPS55137758A/ja
Pending legal-status Critical Current

Links

JP4574679A 1979-04-13 1979-04-13 Extension telephone set connection switching system Pending JPS55137758A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4574679A JPS55137758A (en) 1979-04-13 1979-04-13 Extension telephone set connection switching system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4574679A JPS55137758A (en) 1979-04-13 1979-04-13 Extension telephone set connection switching system

Publications (1)

Publication Number Publication Date
JPS55137758A true JPS55137758A (en) 1980-10-27

Family

ID=12727873

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4574679A Pending JPS55137758A (en) 1979-04-13 1979-04-13 Extension telephone set connection switching system

Country Status (1)

Country Link
JP (1) JPS55137758A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5989063A (ja) * 1982-11-12 1984-05-23 Nec Corp 自動交換機の不応答転送方式
JPS59154864A (ja) * 1983-02-24 1984-09-03 Nec Corp 不応答呼接続処理方式

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52119004A (en) * 1976-03-31 1977-10-06 Hitachi Ltd Switching system having capability of switching connection during call ing

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52119004A (en) * 1976-03-31 1977-10-06 Hitachi Ltd Switching system having capability of switching connection during call ing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5989063A (ja) * 1982-11-12 1984-05-23 Nec Corp 自動交換機の不応答転送方式
JPS59154864A (ja) * 1983-02-24 1984-09-03 Nec Corp 不応答呼接続処理方式

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