EG18642A - Apparatus for connecting and disconnecting a refining signal to a called subscriber - Google Patents

Apparatus for connecting and disconnecting a refining signal to a called subscriber

Info

Publication number
EG18642A
EG18642A EG517/88A EG51788A EG18642A EG 18642 A EG18642 A EG 18642A EG 517/88 A EG517/88 A EG 517/88A EG 51788 A EG51788 A EG 51788A EG 18642 A EG18642 A EG 18642A
Authority
EG
Egypt
Prior art keywords
disconnecting
called subscriber
refining signal
refining
signal
Prior art date
Application number
EG517/88A
Other languages
English (en)
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Application granted granted Critical
Publication of EG18642A publication Critical patent/EG18642A/xx

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Emergency Protection Circuit Devices (AREA)
EG517/88A 1987-10-08 1988-10-09 Apparatus for connecting and disconnecting a refining signal to a called subscriber EG18642A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8703890A SE459138B (sv) 1987-10-08 1987-10-08 Anordning i ett telekommunikationssystem vid inkoppling och urkoppling av en ringsignal

Publications (1)

Publication Number Publication Date
EG18642A true EG18642A (en) 1993-08-30

Family

ID=20369801

Family Applications (1)

Application Number Title Priority Date Filing Date
EG517/88A EG18642A (en) 1987-10-08 1988-10-09 Apparatus for connecting and disconnecting a refining signal to a called subscriber

Country Status (20)

Country Link
US (1) US4908854A (pt)
EP (1) EP0311580B1 (pt)
JP (1) JPH02501525A (pt)
KR (1) KR950013625B1 (pt)
CN (1) CN1014292B (pt)
AR (1) AR243045A1 (pt)
AU (1) AU604383B2 (pt)
BR (1) BR8807236A (pt)
DE (1) DE3868478D1 (pt)
DK (1) DK168316B1 (pt)
EG (1) EG18642A (pt)
ES (1) ES2029730T3 (pt)
FI (1) FI98179C (pt)
GR (1) GR3003929T3 (pt)
IE (1) IE61777B1 (pt)
MX (1) MX169117B (pt)
MY (1) MY103396A (pt)
SE (1) SE459138B (pt)
TR (1) TR28806A (pt)
WO (1) WO1989003625A1 (pt)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT392712B (de) * 1989-05-23 1991-05-27 Siemens Ag Oesterreich Speiseschaltung zur einspeisung von rufwechselspannungen
SE519189C2 (sv) * 1994-06-28 2003-01-28 Ericsson Telefon Ab L M Anordning för att skydda en abonnentlinjekrets från överspänningar
JPH0851652A (ja) * 1994-06-29 1996-02-20 Harris Corp 電話システム用回路、インピーダンス設定回路、加入者線インタフェース回路、並びに接地キー検出器
GB2298533A (en) * 1994-07-29 1996-09-04 Texas Instruments Ltd Overvoltage protector
US5699420A (en) * 1994-12-23 1997-12-16 Lucent Technologies Inc. Bell sound synthesizer
US5528682A (en) * 1995-01-30 1996-06-18 Harris Corporation Double duty capacitor circuit and method
DE19548063C2 (de) * 1995-12-21 1998-03-12 Siemens Ag Schaltungsanordnung zum Schutz einer Teilnehmerschaltung eines Fernmeldevermittlungssystems

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5328317A (en) * 1976-08-30 1978-03-16 Hitachi Ltd Control system of subscriber's calling signal
IT1071838B (it) * 1976-11-12 1985-04-10 Cselt Centro Studi Lab Telecom Soppressore di impulsi di suoneria indesiderati per apparecchi telefonici
NL7700719A (nl) * 1977-01-25 1978-07-27 Philips Nv Storingsongevoelig lijnsupervisiecircuit.
FR2451682A1 (fr) * 1979-03-12 1980-10-10 Jeumont Schneider Dispositif d'appel pour installation telephonique automatique d'abonne avec postes supplementaires

Also Published As

Publication number Publication date
FI98179C (sv) 1997-04-25
SE8703890D0 (sv) 1987-10-08
AU604383B2 (en) 1990-12-13
KR950013625B1 (en) 1995-11-13
US4908854A (en) 1990-03-13
TR28806A (tr) 1997-03-25
EP0311580B1 (en) 1992-02-19
BR8807236A (pt) 1989-10-31
IE61777B1 (en) 1994-11-30
KR890702363A (ko) 1989-12-23
DE3868478D1 (de) 1992-03-26
CN1032610A (zh) 1989-04-26
DK265989D0 (da) 1989-05-31
DK168316B1 (da) 1994-03-07
AR243045A1 (es) 1993-06-30
DK265989A (da) 1989-05-31
FI98179B (fi) 1997-01-15
GR3003929T3 (pt) 1993-03-16
ES2029730T3 (es) 1992-09-01
FI892401A (fi) 1989-05-18
IE882961L (en) 1989-04-08
JPH02501525A (ja) 1990-05-24
SE8703890L (sv) 1989-04-09
EP0311580A1 (en) 1989-04-12
WO1989003625A1 (en) 1989-04-20
CN1014292B (zh) 1991-10-09
FI892401A0 (fi) 1989-05-18
MX169117B (es) 1993-06-22
MY103396A (en) 1993-06-30
AU2533788A (en) 1989-05-02
SE459138B (sv) 1989-06-05

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