SE7800717L - Kopplingskrets for telefonledningar innefattande en storningsokenslig linjeovervakningskrets - Google Patents
Kopplingskrets for telefonledningar innefattande en storningsokenslig linjeovervakningskretsInfo
- Publication number
- SE7800717L SE7800717L SE7800717A SE7800717A SE7800717L SE 7800717 L SE7800717 L SE 7800717L SE 7800717 A SE7800717 A SE 7800717A SE 7800717 A SE7800717 A SE 7800717A SE 7800717 L SE7800717 L SE 7800717L
- Authority
- SE
- Sweden
- Prior art keywords
- distribution
- line monitoring
- circuit
- circuits including
- free line
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Emergency Protection Circuit Devices (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7700719A NL7700719A (nl) | 1977-01-25 | 1977-01-25 | Storingsongevoelig lijnsupervisiecircuit. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE7800717L true SE7800717L (sv) | 1978-07-26 |
| SE435883B SE435883B (sv) | 1984-10-22 |
Family
ID=19827835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7800717A SE435883B (sv) | 1977-01-25 | 1978-01-23 | Kopplingskrets for telefonledningar innefattande en storningsokenslig linjeovervakningskrets |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US4158109A (sv) |
| JP (1) | JPS5394108A (sv) |
| AU (1) | AU517027B2 (sv) |
| BE (1) | BE863213A (sv) |
| BR (1) | BR7800384A (sv) |
| CA (1) | CA1096981A (sv) |
| DE (1) | DE2801335C3 (sv) |
| FR (1) | FR2378417A1 (sv) |
| GB (1) | GB1545453A (sv) |
| NL (1) | NL7700719A (sv) |
| SE (1) | SE435883B (sv) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL57011A (en) * | 1979-04-05 | 1982-05-31 | Tadiran Israel Elect Ind Ltd | Multi purpose current detector for pabx |
| NL7903665A (nl) * | 1979-05-10 | 1980-11-12 | Philips Nv | Aansluitschakeling voor een telefoonlijn. |
| DE2938998C2 (de) * | 1979-09-26 | 1984-12-13 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung für eine die Schaltzustände einer Übertragungsleitung, insbesondere einer Teilnehmeranschlußleitung registrierenden Indikatorschaltung in Fernsprechvermittlungsanlagen |
| GB2066023B (en) * | 1979-12-13 | 1983-11-09 | Standard Telephones Cables Ltd | Telephone line interface |
| US4323734A (en) * | 1980-05-15 | 1982-04-06 | Crest Industries, Inc. | Interface circuit for telephone line to equipment signal coupling |
| FR2501940B1 (fr) * | 1981-03-11 | 1985-07-19 | Trt Telecom Radio Electr | Detecteur de boucle peu sensible aux tensions longitudinales |
| JPS58191479U (ja) * | 1982-06-16 | 1983-12-20 | カルソニックカンセイ株式会社 | バランス型ウオ−タコツク |
| US4809324A (en) * | 1987-07-27 | 1989-02-28 | Siemens Transmission Systems, Inc. | Subscriber line interface circuit (SLIC) isolation from lighting-induced ground overshoots |
| JPH0193687A (ja) * | 1987-10-02 | 1989-04-12 | Hidekuni Yokota | リフト弁装置 |
| SE459138B (sv) * | 1987-10-08 | 1989-06-05 | Ericsson Telefon Ab L M | Anordning i ett telekommunikationssystem vid inkoppling och urkoppling av en ringsignal |
| JP2639304B2 (ja) * | 1993-06-15 | 1997-08-13 | 日本電気株式会社 | 加入者回路 |
| ATE240014T1 (de) * | 1994-02-24 | 2003-05-15 | Infineon Technologies Ag | Integrierbare schaltungsanordnung zur störsicheren abhebeerkennung bei fernsprecheinrichtungen |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1479094A (en) * | 1975-03-25 | 1977-07-06 | Standard Telephones Cables Ltd | Ring trip detectors |
| GB1563803A (en) * | 1975-11-26 | 1980-04-02 | Post Office | Telecommunications transmission and signalling curcuits |
-
1977
- 1977-01-25 NL NL7700719A patent/NL7700719A/xx not_active Application Discontinuation
-
1978
- 1978-01-12 US US05/868,806 patent/US4158109A/en not_active Expired - Lifetime
- 1978-01-13 DE DE2801335A patent/DE2801335C3/de not_active Expired
- 1978-01-18 CA CA295,192A patent/CA1096981A/en not_active Expired
- 1978-01-20 AU AU32605/78A patent/AU517027B2/en not_active Expired
- 1978-01-20 GB GB2371/78A patent/GB1545453A/en not_active Expired
- 1978-01-23 BE BE184553A patent/BE863213A/xx not_active IP Right Cessation
- 1978-01-23 BR BR7800384A patent/BR7800384A/pt unknown
- 1978-01-23 SE SE7800717A patent/SE435883B/sv not_active Application Discontinuation
- 1978-01-24 FR FR7801885A patent/FR2378417A1/fr active Granted
- 1978-01-24 JP JP663078A patent/JPS5394108A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| CA1096981A (en) | 1981-03-03 |
| BE863213A (fr) | 1978-07-24 |
| JPS5394108A (en) | 1978-08-17 |
| DE2801335B2 (de) | 1979-10-18 |
| GB1545453A (en) | 1979-05-10 |
| AU3260578A (en) | 1979-07-26 |
| FR2378417A1 (fr) | 1978-08-18 |
| SE435883B (sv) | 1984-10-22 |
| NL7700719A (nl) | 1978-07-27 |
| BR7800384A (pt) | 1978-10-03 |
| FR2378417B1 (sv) | 1982-09-03 |
| DE2801335A1 (de) | 1978-07-27 |
| JPS576869B2 (sv) | 1982-02-06 |
| US4158109A (en) | 1979-06-12 |
| DE2801335C3 (de) | 1980-07-03 |
| AU517027B2 (en) | 1981-07-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NAV | Patent application has lapsed |
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