JPS5650659A - Control system at interruption for private telephone exchange unit - Google Patents
Control system at interruption for private telephone exchange unitInfo
- Publication number
- JPS5650659A JPS5650659A JP12657179A JP12657179A JPS5650659A JP S5650659 A JPS5650659 A JP S5650659A JP 12657179 A JP12657179 A JP 12657179A JP 12657179 A JP12657179 A JP 12657179A JP S5650659 A JPS5650659 A JP S5650659A
- Authority
- JP
- Japan
- Prior art keywords
- interruption
- subscriber
- call
- sent
- exchange unit
- 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
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
- H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
- H04Q3/625—Arrangements in the private branch exchange
Landscapes
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
Abstract
PURPOSE:To realize an interruption call without giving any confusion to the subscriber to receive an interruption while talking, by sending the interruption warning tone to the subscriber to receive an interruption prior to the interruption. CONSTITUTION:In case the telephone number dialed by the subscriber A is to the subscriber B or C under talking, the busy tone sending trunk BT0 is started from the CPU and via the signal distributor SD to give a display of the busy state to the subscriber A. In this case, if the terminating subscriber permits the interruption, another busy tone BT1 is sent to show the possibility for the interruption call. Thus the subscriber A requests an interruption call, and thus the exchange unit sets up the channels at the interruption call trunks CFT for the subscribers A, B and C each. And at the same time, the interruption warning tone TNT1 is sent to the CFT. In such way, the interruption warning tone can be sent to the subscribers A, B or C, and an interruption call is carried out after a fixed time.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12657179A JPS5650659A (en) | 1979-10-01 | 1979-10-01 | Control system at interruption for private telephone exchange unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12657179A JPS5650659A (en) | 1979-10-01 | 1979-10-01 | Control system at interruption for private telephone exchange unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5650659A true JPS5650659A (en) | 1981-05-07 |
Family
ID=14938452
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12657179A Pending JPS5650659A (en) | 1979-10-01 | 1979-10-01 | Control system at interruption for private telephone exchange unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5650659A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59165555A (en) * | 1983-03-09 | 1984-09-18 | Nec Corp | Circuit monitoring system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS506281A (en) * | 1973-05-18 | 1975-01-22 | ||
JPS5084108A (en) * | 1973-11-27 | 1975-07-07 | ||
JPS5438709A (en) * | 1977-09-01 | 1979-03-23 | Nec Corp | Offring call connection system |
-
1979
- 1979-10-01 JP JP12657179A patent/JPS5650659A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS506281A (en) * | 1973-05-18 | 1975-01-22 | ||
JPS5084108A (en) * | 1973-11-27 | 1975-07-07 | ||
JPS5438709A (en) * | 1977-09-01 | 1979-03-23 | Nec Corp | Offring call connection system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59165555A (en) * | 1983-03-09 | 1984-09-18 | Nec Corp | Circuit monitoring system |
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