JPS553245A - Detecting system for state change of subscriber line - Google Patents
Detecting system for state change of subscriber lineInfo
- Publication number
- JPS553245A JPS553245A JP7566078A JP7566078A JPS553245A JP S553245 A JPS553245 A JP S553245A JP 7566078 A JP7566078 A JP 7566078A JP 7566078 A JP7566078 A JP 7566078A JP S553245 A JPS553245 A JP S553245A
- Authority
- JP
- Japan
- Prior art keywords
- subscriber line
- memory
- circuit
- line state
- renewal
- 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
- H04Q3/00—Selecting arrangements
- H04Q3/72—Finding out and indicating number of calling subscriber
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Exchange Systems With Centralized Control (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
PURPOSE:To avoid the loss of the line state changing information to the pointer setting of the system switching time due to occurrence of the fault by performing renewal of the last-look memory after the reading via the queue register in the detecting system for the state change of the subscriber line for the exchange. CONSTITUTION:Present-look memory 300 memorizes periodically the scanning results of the subscriber line state, and last-look memory 310 memorizes the subscriber line state which was scanned precedingly. In addition to these memories, queue register 350 is installed to memorize in sequence the comparison results between memory 300 and 310. In the exchange of such constitution, the output of subscriber line change detection circuit 330 is applied to ACTM renewal circuit 390, and furthermore the output of pointer initial setting circuit 380 is applied to circuit 390. And no renewal is given to the contents of memory 310 until the memory information of register 350 is read out. Thus, the loss of the subscriber line state change information can be avoided for the queue pointer switch setting.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7566078A JPS553245A (en) | 1978-06-21 | 1978-06-21 | Detecting system for state change of subscriber line |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7566078A JPS553245A (en) | 1978-06-21 | 1978-06-21 | Detecting system for state change of subscriber line |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS553245A true JPS553245A (en) | 1980-01-11 |
JPS5719918B2 JPS5719918B2 (en) | 1982-04-24 |
Family
ID=13582597
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7566078A Granted JPS553245A (en) | 1978-06-21 | 1978-06-21 | Detecting system for state change of subscriber line |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS553245A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5755689A (en) * | 1980-09-22 | 1982-04-02 | Nec Corp | Monitoring circuit for subscriber signal |
JPS6074795A (en) * | 1983-09-30 | 1985-04-27 | Fujitsu Ltd | Signal reception circuit |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3241615A1 (en) * | 1982-11-10 | 1984-05-10 | Audi Nsu Auto Union Ag, 7107 Neckarsulm | METHOD FOR ASSEMBLY OF FINISHED SKIES IN VEHICLES AND DEVICE FOR IMPLEMENTING THE METHOD |
-
1978
- 1978-06-21 JP JP7566078A patent/JPS553245A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5755689A (en) * | 1980-09-22 | 1982-04-02 | Nec Corp | Monitoring circuit for subscriber signal |
JPS6074795A (en) * | 1983-09-30 | 1985-04-27 | Fujitsu Ltd | Signal reception circuit |
Also Published As
Publication number | Publication date |
---|---|
JPS5719918B2 (en) | 1982-04-24 |
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