JPS5656063A - Call waiting system in digital telephone switch-board - Google Patents
Call waiting system in digital telephone switch-boardInfo
- Publication number
- JPS5656063A JPS5656063A JP13085979A JP13085979A JPS5656063A JP S5656063 A JPS5656063 A JP S5656063A JP 13085979 A JP13085979 A JP 13085979A JP 13085979 A JP13085979 A JP 13085979A JP S5656063 A JPS5656063 A JP S5656063A
- Authority
- JP
- Japan
- Prior art keywords
- party
- trunk
- tone
- switch
- call waiting
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
Abstract
PURPOSE:To simplify a service trunk and time-division switch by permitting a call waiting service trunk to be used between the incoming connection request of the 3rd party and the 1st hooking of the 1st party and by making other connections by a time-division switch. CONSTITUTION:The 1st party (subscriber) A and 2nd party B are connected together via time-division switch TDS and when the 3rd party C sends a connection request to the 1st party A during their telephone call, the 1st party A and 2nd party B are connected to call waiting trunk TWT via switch TDS according to the indication of the control processor. Further, the 3rd party C is connected to ringing tone trunk RBT to send a ring-back tone. In addition, the 1st party A and 2nd party B are connected in trunk TWT and an incoming display tone is sent to the 1st subscriber A. As the 1st party A performs hooking operation, switch TDS connects the 1st party A to the 3rd party C and the 2nd party B is connected to busy-tone trunk HST to send a busy tone. Then, as the 1st party A performs the hooking again, switch TDS connects the 1st party A to the 2nd party B and the 3rd party C to trunk HST.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13085979A JPS5943025B2 (en) | 1979-10-12 | 1979-10-12 | Call waiting method in digital telephone exchange |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13085979A JPS5943025B2 (en) | 1979-10-12 | 1979-10-12 | Call waiting method in digital telephone exchange |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5656063A true JPS5656063A (en) | 1981-05-16 |
JPS5943025B2 JPS5943025B2 (en) | 1984-10-19 |
Family
ID=15044359
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13085979A Expired JPS5943025B2 (en) | 1979-10-12 | 1979-10-12 | Call waiting method in digital telephone exchange |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5943025B2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4445212A (en) * | 1981-10-29 | 1984-04-24 | Gte Automatic Electric Labs Inc. | Arrangement for multiple custom calling |
US4445211A (en) * | 1981-10-29 | 1984-04-24 | Gte Automatic Electric Labs Inc. | Arrangement for multiple custom calling |
US4446554A (en) * | 1981-10-29 | 1984-05-01 | Gte Automatic Electric Labs Inc. | Arrangement for multiple custom calling |
JPS6223662A (en) * | 1985-07-24 | 1987-01-31 | Matsushita Electric Ind Co Ltd | Busy tone incoming equipment |
JPS62137958A (en) * | 1985-12-12 | 1987-06-20 | Nec Corp | Terminating circuit while exchange is in busy |
JPH04150546A (en) * | 1990-10-12 | 1992-05-25 | Canon Inc | Telephone exchange |
JPH04365252A (en) * | 1991-06-13 | 1992-12-17 | Fujitsu Ltd | Disconnection informing system for call waiting service |
US5857017A (en) * | 1990-10-12 | 1999-01-05 | Canon Kabushiki Kaisha | Call waiting notifying apparatus |
-
1979
- 1979-10-12 JP JP13085979A patent/JPS5943025B2/en not_active Expired
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4445212A (en) * | 1981-10-29 | 1984-04-24 | Gte Automatic Electric Labs Inc. | Arrangement for multiple custom calling |
US4445211A (en) * | 1981-10-29 | 1984-04-24 | Gte Automatic Electric Labs Inc. | Arrangement for multiple custom calling |
US4446554A (en) * | 1981-10-29 | 1984-05-01 | Gte Automatic Electric Labs Inc. | Arrangement for multiple custom calling |
JPS6223662A (en) * | 1985-07-24 | 1987-01-31 | Matsushita Electric Ind Co Ltd | Busy tone incoming equipment |
JPS62137958A (en) * | 1985-12-12 | 1987-06-20 | Nec Corp | Terminating circuit while exchange is in busy |
JPH04150546A (en) * | 1990-10-12 | 1992-05-25 | Canon Inc | Telephone exchange |
US5857017A (en) * | 1990-10-12 | 1999-01-05 | Canon Kabushiki Kaisha | Call waiting notifying apparatus |
JPH04365252A (en) * | 1991-06-13 | 1992-12-17 | Fujitsu Ltd | Disconnection informing system for call waiting service |
Also Published As
Publication number | Publication date |
---|---|
JPS5943025B2 (en) | 1984-10-19 |
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