CH343462A - Telephon-Teilnehmerapparat - Google Patents
Telephon-TeilnehmerapparatInfo
- Publication number
- CH343462A CH343462A CH343462DA CH343462A CH 343462 A CH343462 A CH 343462A CH 343462D A CH343462D A CH 343462DA CH 343462 A CH343462 A CH 343462A
- Authority
- CH
- Switzerland
- Prior art keywords
- telephone subscriber
- subscriber set
- telephone
- subscriber
- Prior art date
Links
Classifications
-
- 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
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB343462X | 1955-05-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH343462A true CH343462A (de) | 1959-12-31 |
Family
ID=10364494
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH343462D CH343462A (de) | 1955-05-06 | 1956-04-17 | Telephon-Teilnehmerapparat |
Country Status (3)
Country | Link |
---|---|
US (1) | US2916558A (de) |
CH (1) | CH343462A (de) |
GB (1) | GB793543A (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3046353A (en) * | 1956-11-10 | 1962-07-24 | Autophon Ag | Telephone sub-station including microphone amplifier |
US3066195A (en) * | 1958-09-15 | 1962-11-27 | Gen Dynamics Corp | Signal transmitting and receiving station |
GB956356A (en) * | 1960-07-21 | 1964-04-22 | Standard Telephones Cables Ltd | Improvements in or relating to signalling methods between subscriber's sets and exchage |
GB989232A (en) * | 1961-12-08 | 1965-04-14 | Post Office | Improvements in or relating to signalling circuits |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1495295A (en) * | 1924-05-27 | Telephone circuits | ||
US2283646A (en) * | 1939-07-21 | 1942-05-19 | Edna Levi | Telephone apparatus and circuit therefor |
US2332551A (en) * | 1942-06-22 | 1943-10-26 | Bell Telephone Labor Inc | Telephone set circuit |
US2487455A (en) * | 1945-01-29 | 1949-11-08 | Stromberg Carlson Co | Telephone circuit |
US2604545A (en) * | 1950-05-19 | 1952-07-22 | Bell Telephone Labor Inc | Party line station signaling system |
US2759179A (en) * | 1952-12-05 | 1956-08-14 | Bell Telephone Labor Inc | Ringing circuit |
US2761909A (en) * | 1953-01-28 | 1956-09-04 | Bell Telephone Labor Inc | Multifrequency oscillator |
US2818470A (en) * | 1956-03-29 | 1957-12-31 | Bell Telephone Labor Inc | Compensated transistor circuit |
-
1955
- 1955-05-06 GB GB13188/55A patent/GB793543A/en not_active Expired
-
1956
- 1956-04-17 CH CH343462D patent/CH343462A/de unknown
- 1956-04-24 US US580362A patent/US2916558A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
GB793543A (en) | 1958-04-16 |
US2916558A (en) | 1959-12-08 |
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