JPS5396706A - Crosstalk listening prevention circuit for telephone set - Google Patents
Crosstalk listening prevention circuit for telephone setInfo
- Publication number
- JPS5396706A JPS5396706A JP1072277A JP1072277A JPS5396706A JP S5396706 A JPS5396706 A JP S5396706A JP 1072277 A JP1072277 A JP 1072277A JP 1072277 A JP1072277 A JP 1072277A JP S5396706 A JPS5396706 A JP S5396706A
- Authority
- JP
- Japan
- Prior art keywords
- crosstalk
- listening
- telephone set
- prevention circuit
- signals
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
-
- 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)
Abstract
PURPOSE:To make it possible to constantly keep receiving signals at a sufficient volume by adding noise signals to receiving signals to make low-level crosstalk signals impossible to hear.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1072277A JPS5396706A (en) | 1977-02-04 | 1977-02-04 | Crosstalk listening prevention circuit for telephone set |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1072277A JPS5396706A (en) | 1977-02-04 | 1977-02-04 | Crosstalk listening prevention circuit for telephone set |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5396706A true JPS5396706A (en) | 1978-08-24 |
Family
ID=11758169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1072277A Pending JPS5396706A (en) | 1977-02-04 | 1977-02-04 | Crosstalk listening prevention circuit for telephone set |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5396706A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61193545A (en) * | 1985-02-21 | 1986-08-28 | Matsushita Electric Ind Co Ltd | Key telephone set |
-
1977
- 1977-02-04 JP JP1072277A patent/JPS5396706A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61193545A (en) * | 1985-02-21 | 1986-08-28 | Matsushita Electric Ind Co Ltd | Key telephone set |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS52122035A (en) | Stereophonic sound transmitter | |
IL55420A0 (en) | Areceiver for compatible am stereo signals | |
AU497007B2 (en) | Telephone amplifier circuit | |
JPS5379538A (en) | Channel cross talk compensating circuit | |
JPS53140901A (en) | Stereophonic transmitter*receiver | |
JPS5361903A (en) | Unnecessary signal sound suppressor for telephone set | |
JPS5396706A (en) | Crosstalk listening prevention circuit for telephone set | |
AU503870B2 (en) | Multifrequency signal receiver reference signal circuit | |
JPS54136108A (en) | Telephone conference repeater circuit | |
JPS53122308A (en) | Telephone line circuit | |
NZ186190A (en) | Acoustic call receiver circuit | |
AU513375B2 (en) | Receiver muting | |
IT7828785A0 (en) | SECONDARY RECEIVER FOR TELEPHONE EQUIPMENT. | |
JPS53140903A (en) | Recording unit of call | |
JPS53110405A (en) | Circuit for preventing side tone for twoowire telephone set | |
AU544523B2 (en) | Telephone subset circuit | |
JPS53132903A (en) | Cancellation circuit for crosstalk component of angle-modulated wave signal transission line | |
JPS53108212A (en) | Howler sound trasmission system | |
JPS53132922A (en) | Originating system for multi-frequency signal | |
AU532835B2 (en) | Telephone amplifier circuit | |
CA1029877A (en) | Noise suppression circuit for switched telephone lines | |
JPS5219911A (en) | Multiplex communication eqipment | |
JPS5367305A (en) | Receiver circuit | |
JPS53132907A (en) | Cancellation circuit for crosstalk component of angle-modulated wave signal transmission line | |
JPS5482105A (en) | Automatic telephone answering device using morse signal |