LU80182A1 - CIRCUIT ARRANGEMENT FOR TELE-COMMUNICATION SYSTEMS, IN PARTICULAR TELE-COMMUNICATION SYSTEMS WITH SWITCHING DEVICES AND THEIR COMMON INQUIRY DEVICES - Google Patents
CIRCUIT ARRANGEMENT FOR TELE-COMMUNICATION SYSTEMS, IN PARTICULAR TELE-COMMUNICATION SYSTEMS WITH SWITCHING DEVICES AND THEIR COMMON INQUIRY DEVICESInfo
- Publication number
- LU80182A1 LU80182A1 LU80182A LU80182A LU80182A1 LU 80182 A1 LU80182 A1 LU 80182A1 LU 80182 A LU80182 A LU 80182A LU 80182 A LU80182 A LU 80182A LU 80182 A1 LU80182 A1 LU 80182A1
- Authority
- LU
- Luxembourg
- Prior art keywords
- communication systems
- tele
- devices
- circuit arrangement
- switching devices
- Prior art date
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)
- Monitoring And Testing Of Exchanges (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772744118 DE2744118A1 (en) | 1977-09-30 | 1977-09-30 | Telephone exchange with single interrogate unit for several lines - uses interrogate pulse trains of at least two different frequencies to increase unit's capacity |
DE19772748795 DE2748795A1 (en) | 1977-10-31 | 1977-10-31 | Switching characteristics monitor for telecommunications exchange - repeatedly interrogates switching devices and successively compares results |
Publications (1)
Publication Number | Publication Date |
---|---|
LU80182A1 true LU80182A1 (en) | 1979-02-12 |
Family
ID=25772826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
LU80182A LU80182A1 (en) | 1977-09-30 | 1978-08-31 | CIRCUIT ARRANGEMENT FOR TELE-COMMUNICATION SYSTEMS, IN PARTICULAR TELE-COMMUNICATION SYSTEMS WITH SWITCHING DEVICES AND THEIR COMMON INQUIRY DEVICES |
Country Status (6)
Country | Link |
---|---|
AT (1) | ATA698478A (en) |
CH (1) | CH631304A5 (en) |
FR (1) | FR2404980A1 (en) |
GB (1) | GB2006573B (en) |
IT (1) | IT1099616B (en) |
LU (1) | LU80182A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
HU193325B (en) * | 1985-03-29 | 1987-09-28 | Bhg Hiradastech Vallalat | Scanning and preprocessing circuit for centrally controlled apparatuses, preferably telephone exchanges |
EP0213374B1 (en) * | 1985-08-14 | 1990-01-31 | Siemens Aktiengesellschaft | Circuit arrangement for telecommunication exchanges, particularly telephone exchanges, comprising scanning joints which are cyclically controlled by information interrogation devices |
GB2339119B (en) * | 1998-06-30 | 2003-05-21 | Mitel Corp | Method and apparatus for event detection in a switching system |
-
1978
- 1978-08-30 CH CH913278A patent/CH631304A5/en not_active IP Right Cessation
- 1978-08-31 LU LU80182A patent/LU80182A1/en unknown
- 1978-09-27 AT AT0698478A patent/ATA698478A/en unknown
- 1978-09-29 IT IT28249/78A patent/IT1099616B/en active
- 1978-09-29 FR FR7827914A patent/FR2404980A1/en not_active Withdrawn
- 1978-09-29 GB GB7838693A patent/GB2006573B/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
IT1099616B (en) | 1985-09-18 |
IT7828249A0 (en) | 1978-09-29 |
CH631304A5 (en) | 1982-07-30 |
GB2006573B (en) | 1982-01-13 |
ATA698478A (en) | 1982-09-15 |
GB2006573A (en) | 1979-05-02 |
FR2404980A1 (en) | 1979-04-27 |
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