JPS57204666A - Ringing signal controlling system - Google Patents
Ringing signal controlling systemInfo
- Publication number
- JPS57204666A JPS57204666A JP8886281A JP8886281A JPS57204666A JP S57204666 A JPS57204666 A JP S57204666A JP 8886281 A JP8886281 A JP 8886281A JP 8886281 A JP8886281 A JP 8886281A JP S57204666 A JPS57204666 A JP S57204666A
- Authority
- JP
- Japan
- Prior art keywords
- signal controlling
- control word
- ringing signal
- signals
- devices
- 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
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/02—Calling substations, e.g. by ringing
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Abstract
PURPOSE:To simplify the control of ringing signal controlling device, by performing designations and operation checks to each ringing signal controlling device for current use and stand-by with a single control word. CONSTITUTION:One of doubled maintenance signal controlling devices 3-0 and 3-1 delivers, for example, a control word composed of 16 bits to double ringing signal controlling devices 4-0 and 4-1. The device currently used 4-0 receives the lower 8 bits of the control word and the stand-by device 4-1 receives the upper 8 bits. Both the devices 4-0 and 4-1 receive the control word at their controlling section 8, respectively. Relay circuits 9-00-9-0n in each device 4-0 and 4-1 output signals of ringing signal generators 5-0-5-n after combining them in accordance with the designation of the control word. Signals of the currently used device side out of these signals are sent to a line circuit through a switching circuit section 6 which is controlled by a switching controlling device 7. Check signals from the ringing signal controlling devices 4-0 and 4-1 are transferred to the maintenance signal controlling devices 3-0 and 3-1 through monitors 10-00-10-0n as a piece of control word.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8886281A JPS57204666A (en) | 1981-06-11 | 1981-06-11 | Ringing signal controlling system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8886281A JPS57204666A (en) | 1981-06-11 | 1981-06-11 | Ringing signal controlling system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57204666A true JPS57204666A (en) | 1982-12-15 |
Family
ID=13954804
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8886281A Pending JPS57204666A (en) | 1981-06-11 | 1981-06-11 | Ringing signal controlling system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57204666A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7846596B2 (en) | 2004-11-09 | 2010-12-07 | Honda Motor Co., Ltd. | Fuel cell system and method of discharging a reaction gas from the fuel cell system |
-
1981
- 1981-06-11 JP JP8886281A patent/JPS57204666A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7846596B2 (en) | 2004-11-09 | 2010-12-07 | Honda Motor Co., Ltd. | Fuel cell system and method of discharging a reaction gas from the fuel cell system |
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