JPS57211860A - Incoming regulating system for push-button dial telephone system - Google Patents
Incoming regulating system for push-button dial telephone systemInfo
- Publication number
- JPS57211860A JPS57211860A JP9599981A JP9599981A JPS57211860A JP S57211860 A JPS57211860 A JP S57211860A JP 9599981 A JP9599981 A JP 9599981A JP 9599981 A JP9599981 A JP 9599981A JP S57211860 A JPS57211860 A JP S57211860A
- Authority
- JP
- Japan
- Prior art keywords
- calling
- incoming
- telephone set
- signal
- push
- 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
- H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
- H04M1/663—Preventing unauthorised calls to a telephone set
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Abstract
PURPOSE:To send a busy tone to a calling subscriber at the regulation of incoming by providing a push-button dial telephone set with a busy tone generator, an incoming regulating switch and a control part. CONSTITUTION:When incoming regulation is not applied to a bush-button dial telephone set shown in the drawing and a switch 80 is off, switches 71, 72 are on. If a calling signal is inputted from a calling telephone set to a voice calling line 17 by a well-known procedure, the calling signal is applied to a speaker 63 through a converting circuit 68 and receiver amplifiers 67, 65 to perform voice calling. When the switch 80 is turned on and incoming regulation is applied to the telephone set shown in the drawing, the switches 71, 72 are turned off, the calling signal from the line 17 is not transmitted to the speaker 63 and, in exchange for the calling signal, a busy signal from a signal source 73 is sent to the calling telephone set through a transmitter amplifier 66 and the converting circuit 68.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9599981A JPS57211860A (en) | 1981-06-23 | 1981-06-23 | Incoming regulating system for push-button dial telephone system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9599981A JPS57211860A (en) | 1981-06-23 | 1981-06-23 | Incoming regulating system for push-button dial telephone system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57211860A true JPS57211860A (en) | 1982-12-25 |
Family
ID=14152786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9599981A Pending JPS57211860A (en) | 1981-06-23 | 1981-06-23 | Incoming regulating system for push-button dial telephone system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57211860A (en) |
-
1981
- 1981-06-23 JP JP9599981A patent/JPS57211860A/en active Pending
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