JPS61252793A - 発信音検出回路 - Google Patents

発信音検出回路

Info

Publication number
JPS61252793A
JPS61252793A JP9442885A JP9442885A JPS61252793A JP S61252793 A JPS61252793 A JP S61252793A JP 9442885 A JP9442885 A JP 9442885A JP 9442885 A JP9442885 A JP 9442885A JP S61252793 A JPS61252793 A JP S61252793A
Authority
JP
Japan
Prior art keywords
circuit
line
dial tone
tone detecting
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.)
Granted
Application number
JP9442885A
Other languages
English (en)
Japanese (ja)
Other versions
JPH044800B2 (enrdf_load_stackoverflow
Inventor
Kazuo Kawana
川名　和夫
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 Engineering Ltd
Original Assignee
NEC Engineering 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 Engineering Ltd filed Critical NEC Engineering Ltd
Priority to JP9442885A priority Critical patent/JPS61252793A/ja
Publication of JPS61252793A publication Critical patent/JPS61252793A/ja
Publication of JPH044800B2 publication Critical patent/JPH044800B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H04Q3/625—Arrangements in the private branch exchange

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
JP9442885A 1985-04-30 1985-04-30 発信音検出回路 Granted JPS61252793A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9442885A JPS61252793A (ja) 1985-04-30 1985-04-30 発信音検出回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9442885A JPS61252793A (ja) 1985-04-30 1985-04-30 発信音検出回路

Publications (2)

Publication Number Publication Date
JPS61252793A true JPS61252793A (ja) 1986-11-10
JPH044800B2 JPH044800B2 (enrdf_load_stackoverflow) 1992-01-29

Family

ID=14109957

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9442885A Granted JPS61252793A (ja) 1985-04-30 1985-04-30 発信音検出回路

Country Status (1)

Country Link
JP (1) JPS61252793A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPH044800B2 (enrdf_load_stackoverflow) 1992-01-29

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