JPS56147553A - Automatic call back system - Google Patents
Automatic call back systemInfo
- Publication number
- JPS56147553A JPS56147553A JP5040880A JP5040880A JPS56147553A JP S56147553 A JPS56147553 A JP S56147553A JP 5040880 A JP5040880 A JP 5040880A JP 5040880 A JP5040880 A JP 5040880A JP S56147553 A JPS56147553 A JP S56147553A
- Authority
- JP
- Japan
- Prior art keywords
- telephone set
- station
- signal
- central controller
- subscriber
- 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
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/48—Arrangements for recalling a calling subscriber when the wanted subscriber ceases to be busy
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Abstract
PURPOSE:To enable the automatic callback even for other station subscribers, by transmitting the subscriber status request signal from the transmission station to the incoming station periodically, when automatic callback registration is present to the telephone sets of other station. CONSTITUTION:When the subscriber A dials the number of the telephone set 1B from the telephone set 1A and confirms busy tone, the telephone set 1A is hooked and the specific number for automaic callback and the telephone number of the subscriber B are dialed. This dial signal is received at the central controller 8A via the scanner 6A and registrated in the memory device 9A. The central controller 8A transmits the subscriber status request signal to the incoming station from the common line signal device 10A periodically. When the central controller 8B of the incoming station receives this signal, the subscriber status signal of the telephone set 1B is returned to the outgoing station. If the telephone set 1B is vacant, the central controller 8A makes call out connection of the telephone set 1A, allowing the connection with the telephone set 1B the same as normal outgoing connection.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5040880A JPS56147553A (en) | 1980-04-18 | 1980-04-18 | Automatic call back system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5040880A JPS56147553A (en) | 1980-04-18 | 1980-04-18 | Automatic call back system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56147553A true JPS56147553A (en) | 1981-11-16 |
Family
ID=12858033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5040880A Pending JPS56147553A (en) | 1980-04-18 | 1980-04-18 | Automatic call back system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56147553A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03143151A (en) * | 1989-10-30 | 1991-06-18 | Hitachi Ltd | Camp-on service system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5145926A (en) * | 1974-10-17 | 1976-04-19 | Matsushita Electric Ind Co Ltd | TEREBIJON JUZOKI |
JPS5311163A (en) * | 1976-07-16 | 1978-02-01 | Mitsubishi Electric Corp | Denitrating method for exhaust gas |
-
1980
- 1980-04-18 JP JP5040880A patent/JPS56147553A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5145926A (en) * | 1974-10-17 | 1976-04-19 | Matsushita Electric Ind Co Ltd | TEREBIJON JUZOKI |
JPS5311163A (en) * | 1976-07-16 | 1978-02-01 | Mitsubishi Electric Corp | Denitrating method for exhaust gas |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03143151A (en) * | 1989-10-30 | 1991-06-18 | Hitachi Ltd | Camp-on service system |
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