CH541914A - Circuit arrangement for telephone systems with inductive coupling of audio signals - Google Patents
Circuit arrangement for telephone systems with inductive coupling of audio signalsInfo
- Publication number
- CH541914A CH541914A CH245672A CH245672A CH541914A CH 541914 A CH541914 A CH 541914A CH 245672 A CH245672 A CH 245672A CH 245672 A CH245672 A CH 245672A CH 541914 A CH541914 A CH 541914A
- Authority
- CH
- Switzerland
- Prior art keywords
- audio signals
- circuit arrangement
- inductive coupling
- telephone systems
- telephone
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
-
- 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)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2111787 | 1971-03-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH541914A true CH541914A (en) | 1973-09-15 |
Family
ID=5801255
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH245672A CH541914A (en) | 1971-03-11 | 1972-02-21 | Circuit arrangement for telephone systems with inductive coupling of audio signals |
Country Status (9)
Country | Link |
---|---|
AT (1) | AT323811B (en) |
BE (1) | BE780525A (en) |
CH (1) | CH541914A (en) |
DE (1) | DE2111787B1 (en) |
FR (1) | FR2129593A5 (en) |
GB (1) | GB1370163A (en) |
IT (1) | IT956223B (en) |
LU (1) | LU64933A1 (en) |
NL (1) | NL7202872A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4028498A (en) * | 1974-10-07 | 1977-06-07 | Solid State Systems, Inc. | Private automatic branch exchange system and apparatus |
DE3007942A1 (en) * | 1980-03-01 | 1981-09-24 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Tone signal generator for telephone exchange - has circuit which can be connected to one or more subscribers as required and ordered by central controller |
DE3014572C2 (en) * | 1980-04-16 | 1982-12-09 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Circuit arrangement for sending low-frequency signals on connecting lines in telephone exchanges |
IE54008B1 (en) * | 1982-11-17 | 1989-05-10 | Lake Electronic Tech | Apparatus for delivering a signal on a telephone |
-
1971
- 1971-03-11 DE DE19712111787D patent/DE2111787B1/en active Pending
-
1972
- 1972-02-21 CH CH245672A patent/CH541914A/en not_active IP Right Cessation
- 1972-02-24 AT AT151872A patent/AT323811B/en not_active IP Right Cessation
- 1972-03-03 NL NL7202872A patent/NL7202872A/xx unknown
- 1972-03-08 GB GB1069572A patent/GB1370163A/en not_active Expired
- 1972-03-09 LU LU64933D patent/LU64933A1/xx unknown
- 1972-03-10 IT IT21669/72A patent/IT956223B/en active
- 1972-03-10 BE BE780525A patent/BE780525A/en unknown
- 1972-03-10 FR FR7208410A patent/FR2129593A5/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE780525A (en) | 1972-09-11 |
NL7202872A (en) | 1972-09-13 |
FR2129593A5 (en) | 1972-10-27 |
LU64933A1 (en) | 1972-07-07 |
AT323811B (en) | 1975-07-25 |
IT956223B (en) | 1973-10-10 |
DE2111787B1 (en) | 1972-05-31 |
GB1370163A (en) | 1974-10-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA946946A (en) | Signal coupling circuit | |
BE778599A (en) | PCB connector | |
AT287792B (en) | System for the transmission of signals | |
AT238265B (en) | Transmission system for the transmission of pulse signals | |
CH552917A (en) | CIRCUIT ARRANGEMENT FOR TRANSMISSION OF A DC SIGNAL. | |
CH536583A (en) | Receiver for data signals with an automatic line correction arrangement | |
CH519829A (en) | Circuit arrangement for the pulse-controlled connection of a telecommunications signal source with a telecommunications signal load | |
CH540553A (en) | Branch device for community antenna systems | |
CH543199A (en) | System for the transmission of two signals | |
CH541914A (en) | Circuit arrangement for telephone systems with inductive coupling of audio signals | |
BE791415A (en) | BELL STOP CIRCUIT | |
AT336693B (en) | TELEPHONE SWITCHING SYSTEM | |
CH539797A (en) | mute | |
BR7208486D0 (en) | AN ELECTROMAGNETIC COUPLING | |
AT317312B (en) | Circuit arrangement for the floating transmission of direct current signals | |
CA974645A (en) | Method and circuit arrangements for the digital decoding of frequency-coded signals | |
AT244393B (en) | Device for distortion compensation in the transmission of communication signals | |
CH549250A (en) | CIRCUIT FOR PROCESSING THE SIGNALS SUPPLIED BY AN ELECTRO-OPTICAL CONVERTER. | |
CH481528A (en) | Detector circuit for the demodulation of FM signals | |
AT313978B (en) | Gyrator circuit | |
DK114914B (en) | Coupling for frequency modulated signals. | |
CH534995A (en) | Circuit arrangement for monitoring PCM coupling devices | |
AT333851B (en) | CIRCUIT ARRANGEMENT FOR DISCOVERED TRANSMISSION OF VOICE SIGNALS | |
DK146140C (en) | CIRCUIT FOR IMPROVING SIGNAL / NOISE CONDITIONS | |
CH539349A (en) | Circuit to block signal transmission |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PL | Patent ceased |