JPS6422193A - Telephone system - Google Patents

Telephone system

Info

Publication number
JPS6422193A
JPS6422193A JP17721487A JP17721487A JPS6422193A JP S6422193 A JPS6422193 A JP S6422193A JP 17721487 A JP17721487 A JP 17721487A JP 17721487 A JP17721487 A JP 17721487A JP S6422193 A JPS6422193 A JP S6422193A
Authority
JP
Japan
Prior art keywords
extension call
channels
tel
cpu
plural channels
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
JP17721487A
Other languages
Japanese (ja)
Inventor
Makoto Yoshimoto
Shigeo Okuyama
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.)
Iwatsu Electric Co Ltd
Original Assignee
Iwatsu 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 Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Priority to JP17721487A priority Critical patent/JPS6422193A/en
Publication of JPS6422193A publication Critical patent/JPS6422193A/en
Pending legal-status Critical Current

Links

Landscapes

  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To simply and economically execute an extension call by switching an extension call to an unused channel other than channels during use out of the plural channels. CONSTITUTION:On-hook and off-hook information from respective key telephone systems No.1 TEL and No.2 TEL, and function information, etc., operated by respective types of function selecting switches 18-1 and 18-2 are transmitted to a main device ME. A CPU 4 in the main device ME controls respective parts. When one of the plural channels is used with the extension call, and necessity occurs which uses the channel during the use for a trunk line, etc., the CPU 4 switches and shifts the extension call to the unused channel other than the channels during the use out of the plural channels.
JP17721487A 1987-07-17 1987-07-17 Telephone system Pending JPS6422193A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17721487A JPS6422193A (en) 1987-07-17 1987-07-17 Telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17721487A JPS6422193A (en) 1987-07-17 1987-07-17 Telephone system

Publications (1)

Publication Number Publication Date
JPS6422193A true JPS6422193A (en) 1989-01-25

Family

ID=16027158

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17721487A Pending JPS6422193A (en) 1987-07-17 1987-07-17 Telephone system

Country Status (1)

Country Link
JP (1) JPS6422193A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56161753A (en) * 1980-05-16 1981-12-12 Iwatsu Electric Co Ltd Key telephone set

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56161753A (en) * 1980-05-16 1981-12-12 Iwatsu Electric Co Ltd Key telephone set

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