JPS5647156A - Conference telephone release system - Google Patents
Conference telephone release systemInfo
- Publication number
- JPS5647156A JPS5647156A JP12358079A JP12358079A JPS5647156A JP S5647156 A JPS5647156 A JP S5647156A JP 12358079 A JP12358079 A JP 12358079A JP 12358079 A JP12358079 A JP 12358079A JP S5647156 A JPS5647156 A JP S5647156A
- Authority
- JP
- Japan
- Prior art keywords
- conference
- telephone set
- busy tone
- line
- circuit
- 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
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2203/00—Aspects of automatic or semi-automatic exchanges
- H04M2203/50—Aspects of automatic or semi-automatic exchanges related to audio conference
- H04M2203/5027—Dropping a party from a conference
-
- 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
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
- H04M3/568—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
Abstract
PURPOSE:To eliminate the need to rebuild the controller, etc., of a main switchboard even when a conference telephone set is added to the switchboard later, by providing the conference telephone set with a busy tone detecting circuit corresponding to terminals. CONSTITUTION:Extension telephone sets 1 are connected to conference telephone set 8 via line circuits 2, channel switch 3, intra-office trunks 4, and conference line circuits 11, and outside line telephone set 9 via intra-office traunk 5, channel switch 3 and conference line circuit 11. After a conference connection, when an on-hook subscriber answers, busy tone generating circuit 10 is connected to channel switch 3 and line circuit 11. Then, busy tone detecting circuit 6 detects a busy tone and sends a line release signal to disconnect the on-hook subscriber from the conference subscriber's terminal. Therefore, even if conference telephone set 8 does not detect a polarity inversion signal due to the on-hook state, the busy tone is sent to neither the conference interface nor mixing circuit 7, so that the conference can be carried on.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12358079A JPS5647156A (en) | 1979-09-26 | 1979-09-26 | Conference telephone release system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12358079A JPS5647156A (en) | 1979-09-26 | 1979-09-26 | Conference telephone release system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5647156A true JPS5647156A (en) | 1981-04-28 |
Family
ID=14864098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12358079A Pending JPS5647156A (en) | 1979-09-26 | 1979-09-26 | Conference telephone release system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5647156A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06217021A (en) * | 1992-10-16 | 1994-08-05 | Internatl Business Mach Corp <Ibm> | Method and system for calling setup of multimedia-network-bus, and method and system for channel assignment thereof |
-
1979
- 1979-09-26 JP JP12358079A patent/JPS5647156A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06217021A (en) * | 1992-10-16 | 1994-08-05 | Internatl Business Mach Corp <Ibm> | Method and system for calling setup of multimedia-network-bus, and method and system for channel assignment thereof |
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