FR2260235B1 - - Google Patents
Info
- Publication number
- FR2260235B1 FR2260235B1 FR7403795A FR7403795A FR2260235B1 FR 2260235 B1 FR2260235 B1 FR 2260235B1 FR 7403795 A FR7403795 A FR 7403795A FR 7403795 A FR7403795 A FR 7403795A FR 2260235 B1 FR2260235 B1 FR 2260235B1
- Authority
- FR
- France
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/24—Arrangements for supervision, monitoring or testing with provision for checking the normal operation
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7403795A FR2260235A1 (en) | 1974-02-05 | 1974-02-05 | Low frequency telephony pulse detector - detects test signal in synchronism with strong active signal presence |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7403795A FR2260235A1 (en) | 1974-02-05 | 1974-02-05 | Low frequency telephony pulse detector - detects test signal in synchronism with strong active signal presence |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2260235A1 FR2260235A1 (en) | 1975-08-29 |
FR2260235B1 true FR2260235B1 (en) | 1976-11-26 |
Family
ID=9134490
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7403795A Granted FR2260235A1 (en) | 1974-02-05 | 1974-02-05 | Low frequency telephony pulse detector - detects test signal in synchronism with strong active signal presence |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2260235A1 (en) |
-
1974
- 1974-02-05 FR FR7403795A patent/FR2260235A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2260235A1 (en) | 1975-08-29 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |