MX142880A - Mejoras a circuito detector de criterios telefonicos - Google Patents
Mejoras a circuito detector de criterios telefonicosInfo
- Publication number
- MX142880A MX142880A MX168637A MX16863777A MX142880A MX 142880 A MX142880 A MX 142880A MX 168637 A MX168637 A MX 168637A MX 16863777 A MX16863777 A MX 16863777A MX 142880 A MX142880 A MX 142880A
- Authority
- MX
- Mexico
- Prior art keywords
- detector circuit
- telephone
- criteria detector
- telephone criteria
- circuit
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT21954/76A IT1063854B (it) | 1976-04-06 | 1976-04-06 | Disposizione circuitale per la rilevazione di criteri telefonici |
Publications (1)
Publication Number | Publication Date |
---|---|
MX142880A true MX142880A (es) | 1981-01-13 |
Family
ID=11189338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MX168637A MX142880A (es) | 1976-04-06 | 1977-04-04 | Mejoras a circuito detector de criterios telefonicos |
Country Status (5)
Country | Link |
---|---|
US (1) | US4115664A (es) |
BR (1) | BR7702065A (es) |
DE (1) | DE2715511A1 (es) |
IT (1) | IT1063854B (es) |
MX (1) | MX142880A (es) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2821468C2 (de) * | 1978-05-17 | 1984-05-30 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Schaltungsanordnung zum Erkennen von Anrufzeichen und Auslösekriterien in Fernmelde-, insbesondere Fernsprechnebenstellenanlagen |
IL57011A (en) * | 1979-04-05 | 1982-05-31 | Tadiran Israel Elect Ind Ltd | Multi purpose current detector for pabx |
DE3214624C2 (de) * | 1982-04-20 | 1986-05-28 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zur Auswertung von Teilnehmerschleifenzuständen in Fernsprechanlagen, insbesondere in Fernsprechnebenstellenanlagen |
US4473719A (en) * | 1982-05-17 | 1984-09-25 | At&T Bell Laboratories | Switchhook status detector |
US4447675A (en) * | 1982-10-29 | 1984-05-08 | Bell Telephone Laboratories, Incorporated | Ring-trip detector |
US4631362A (en) * | 1984-09-27 | 1986-12-23 | At&T Bell Laboratories | Low resistance origination scan circuit |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3757052A (en) * | 1971-10-19 | 1973-09-04 | Electro Dynamics & Telecom Ltd | Telephone line extender with test thru capability |
US3829619A (en) * | 1972-12-29 | 1974-08-13 | Stromberg Carlson Corp | Telephone ring trip circuit |
US3838223A (en) * | 1973-10-01 | 1974-09-24 | Gte Automatic Electric Lab Inc | Ring trip and dial pulse detection circuit |
US3941939A (en) * | 1974-11-25 | 1976-03-02 | International Telephone And Telegraph Corporation | Electronic ring trip circuit |
-
1976
- 1976-04-06 IT IT21954/76A patent/IT1063854B/it active
-
1977
- 1977-04-01 BR BR7702065A patent/BR7702065A/pt unknown
- 1977-04-04 MX MX168637A patent/MX142880A/es unknown
- 1977-04-05 US US05/784,673 patent/US4115664A/en not_active Expired - Lifetime
- 1977-04-06 DE DE19772715511 patent/DE2715511A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
IT1063854B (it) | 1985-02-18 |
DE2715511A1 (de) | 1977-10-20 |
US4115664A (en) | 1978-09-19 |
BR7702065A (pt) | 1978-01-03 |
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