JPS6473850A - Telephone set - Google Patents

Telephone set

Info

Publication number
JPS6473850A
JPS6473850A JP62230464A JP23046487A JPS6473850A JP S6473850 A JPS6473850 A JP S6473850A JP 62230464 A JP62230464 A JP 62230464A JP 23046487 A JP23046487 A JP 23046487A JP S6473850 A JPS6473850 A JP S6473850A
Authority
JP
Japan
Prior art keywords
telephone set
line
busy
circuit
call
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
JP62230464A
Other languages
Japanese (ja)
Inventor
Takao Oda
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 JP62230464A priority Critical patent/JPS6473850A/en
Publication of JPS6473850A publication Critical patent/JPS6473850A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent a telephone set in busy from being disturbed, by disconnecting a line between a line control means by a disconnection means at its own telephone set when a DC loop is already formed by another telephone set connected to the line. CONSTITUTION:At the front stage of a speech circuit 217, a disconnection circuit 231 consisting of a switch and a loop detection circuit 233 to detect the fact that another telephone set is in busy (off-hook state) are connected to the line 211. When the telephone set 2101 is set in a busy state and a test to place a call at another telephone set 2102 connected commonly to the line 211 is performed, since a speech switch is not closed by the operation of the loop detection circuit 233 even when a handset 223 is raised at the telephone set 2102, no call by the said telephone set 2102 can be performed.
JP62230464A 1987-09-14 1987-09-14 Telephone set Pending JPS6473850A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62230464A JPS6473850A (en) 1987-09-14 1987-09-14 Telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62230464A JPS6473850A (en) 1987-09-14 1987-09-14 Telephone set

Publications (1)

Publication Number Publication Date
JPS6473850A true JPS6473850A (en) 1989-03-20

Family

ID=16908252

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62230464A Pending JPS6473850A (en) 1987-09-14 1987-09-14 Telephone set

Country Status (1)

Country Link
JP (1) JPS6473850A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0546025A (en) * 1991-08-16 1993-02-26 Ricoh Co Ltd Electrophotographic recorder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0546025A (en) * 1991-08-16 1993-02-26 Ricoh Co Ltd Electrophotographic recorder

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