JPS5897949A - リングトリップ回路 - Google Patents

リングトリップ回路

Info

Publication number
JPS5897949A
JPS5897949A JP19707381A JP19707381A JPS5897949A JP S5897949 A JPS5897949 A JP S5897949A JP 19707381 A JP19707381 A JP 19707381A JP 19707381 A JP19707381 A JP 19707381A JP S5897949 A JPS5897949 A JP S5897949A
Authority
JP
Japan
Prior art keywords
circuit
value
call signal
current
period
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
JP19707381A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0241941B2 (enrdf_load_stackoverflow
Inventor
Haruyuki Yoshino
吉野　春幸
Kazuhiko Ito
和彦 伊東
Kazuo Hamasato
和雄 浜里
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
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
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, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP19707381A priority Critical patent/JPS5897949A/ja
Publication of JPS5897949A publication Critical patent/JPS5897949A/ja
Publication of JPH0241941B2 publication Critical patent/JPH0241941B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/02—Calling substations, e.g. by ringing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
JP19707381A 1981-12-08 1981-12-08 リングトリップ回路 Granted JPS5897949A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19707381A JPS5897949A (ja) 1981-12-08 1981-12-08 リングトリップ回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19707381A JPS5897949A (ja) 1981-12-08 1981-12-08 リングトリップ回路

Publications (2)

Publication Number Publication Date
JPS5897949A true JPS5897949A (ja) 1983-06-10
JPH0241941B2 JPH0241941B2 (enrdf_load_stackoverflow) 1990-09-20

Family

ID=16368260

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19707381A Granted JPS5897949A (ja) 1981-12-08 1981-12-08 リングトリップ回路

Country Status (1)

Country Link
JP (1) JPS5897949A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5734712A (en) * 1994-01-21 1998-03-31 Telefonaktiebolaget Lm Ericsson Method for off-hook detection during ringing and the use of a subscriber line interface circuit for off-hook detection during ringing

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50104509A (enrdf_load_stackoverflow) * 1974-01-18 1975-08-18
JPS56131246A (en) * 1980-02-19 1981-10-14 Cselt Centro Studi Lab Telecom Telephone circuit for generating ringing rhythm and detecting off-hook state

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50104509A (enrdf_load_stackoverflow) * 1974-01-18 1975-08-18
JPS56131246A (en) * 1980-02-19 1981-10-14 Cselt Centro Studi Lab Telecom Telephone circuit for generating ringing rhythm and detecting off-hook state

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5734712A (en) * 1994-01-21 1998-03-31 Telefonaktiebolaget Lm Ericsson Method for off-hook detection during ringing and the use of a subscriber line interface circuit for off-hook detection during ringing

Also Published As

Publication number Publication date
JPH0241941B2 (enrdf_load_stackoverflow) 1990-09-20

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