JPS5661883A - Originating ground control release system - Google Patents
Originating ground control release systemInfo
- Publication number
- JPS5661883A JPS5661883A JP13647179A JP13647179A JPS5661883A JP S5661883 A JPS5661883 A JP S5661883A JP 13647179 A JP13647179 A JP 13647179A JP 13647179 A JP13647179 A JP 13647179A JP S5661883 A JPS5661883 A JP S5661883A
- Authority
- JP
- Japan
- Prior art keywords
- ground control
- originating
- extension
- originating ground
- register
- 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)
- Exchange Systems With Centralized Control (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Abstract
PURPOSE:To improve the serviceability of an automatic private branch exchange by releasing an extension telephone set from originating ground control temporarily by adding slight originating ground control release information to an extension crossword in a memory unit and by modifying the program slightly. CONSTITUTION:When extension telophone set A is placed in the off-hook state, originating register OR sends a dial tone out and an office number, when dialed, is received by register OR and transferred to central controller CC by way of scanner SCN. According to the prescribed program, controller CC holds a connection to the central office trunk in readiness. On arrival of a dialed specific number for originating ground control from telephone set A after the initial dial tone transmission, controller CC reads extension crossword SCLS of telephone set A out of memory unit MM according to the result of a number analysis and, while holding the originating ground control release information FRE at ''1'', sends control information to signal distributor SD to enable a telephone call by sending the dial tone from register OR again. Further, the information FRE is held at ''0'' at the end of the telephone call, so that the originating ground control will be released temporarily.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13647179A JPS5661883A (en) | 1979-10-24 | 1979-10-24 | Originating ground control release system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13647179A JPS5661883A (en) | 1979-10-24 | 1979-10-24 | Originating ground control release system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5661883A true JPS5661883A (en) | 1981-05-27 |
Family
ID=15175887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13647179A Pending JPS5661883A (en) | 1979-10-24 | 1979-10-24 | Originating ground control release system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5661883A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63133792A (en) * | 1986-11-26 | 1988-06-06 | Hitachi Ltd | Line routing system |
-
1979
- 1979-10-24 JP JP13647179A patent/JPS5661883A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63133792A (en) * | 1986-11-26 | 1988-06-06 | Hitachi Ltd | Line routing system |
| JPH0759098B2 (en) * | 1986-11-26 | 1995-06-21 | 株式会社日立製作所 | Line routing method |
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