JPS5545213A - Speaker line switch for emergency broadcast - Google Patents
Speaker line switch for emergency broadcastInfo
- Publication number
- JPS5545213A JPS5545213A JP11799578A JP11799578A JPS5545213A JP S5545213 A JPS5545213 A JP S5545213A JP 11799578 A JP11799578 A JP 11799578A JP 11799578 A JP11799578 A JP 11799578A JP S5545213 A JPS5545213 A JP S5545213A
- Authority
- JP
- Japan
- Prior art keywords
- switch
- line
- speaker
- emergency
- broadcast
- 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
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/76—Wired systems
- H04H20/82—Wired systems using signals not modulated onto a carrier
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/26—Arrangements for switching distribution systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
- H04H20/59—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for emergency or urgency
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/76—Wired systems
- H04H20/82—Wired systems using signals not modulated onto a carrier
- H04H20/83—Wired systems using signals not modulated onto a carrier not sharing the network with any other service
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Alarm Systems (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
PURPOSE:To facilitate part management and repair with parts, which can be used commonly, without special relays, etc., by using commonly the speaker line and the line switch, which have been already provided, when an emergency broadcast equipment is provided newly. CONSTITUTION:Switch 27 is inserted to the service broadcast line which has been already provided, and a line for connecting an emergency equipment newly is inputted to this switch 27, and the line, the broadcast switch, etc., which have been already provided are used as they are by performing switching operation. Therefore, switch 27 is provided with various terminals 28, 30, 33, 34, 36, 39, 40 and 45, and is provided with input switching switch 32 speaker switching switch 38. All speaker lines 37 are controlled in case of emergency use and control circuit 41 is used to use a part of lines 37 selectively in case of partial use. Further, a power source is led from the external, and rectifier circuit 44 is provided.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11799578A JPS5545213A (en) | 1978-09-27 | 1978-09-27 | Speaker line switch for emergency broadcast |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11799578A JPS5545213A (en) | 1978-09-27 | 1978-09-27 | Speaker line switch for emergency broadcast |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5545213A true JPS5545213A (en) | 1980-03-29 |
Family
ID=14725420
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11799578A Pending JPS5545213A (en) | 1978-09-27 | 1978-09-27 | Speaker line switch for emergency broadcast |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5545213A (en) |
-
1978
- 1978-09-27 JP JP11799578A patent/JPS5545213A/en active Pending
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