FR2252714B3 - - Google Patents
Info
- Publication number
- FR2252714B3 FR2252714B3 FR7436480A FR7436480A FR2252714B3 FR 2252714 B3 FR2252714 B3 FR 2252714B3 FR 7436480 A FR7436480 A FR 7436480A FR 7436480 A FR7436480 A FR 7436480A FR 2252714 B3 FR2252714 B3 FR 2252714B3
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/001—Two-way communication systems between a limited number of parties
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
- H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
- H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19732358143 DE2358143B2 (en) | 1973-11-22 | 1973-11-22 | Device for checking loudspeaker systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2252714A1 FR2252714A1 (en) | 1975-06-20 |
| FR2252714B3 true FR2252714B3 (en) | 1976-12-10 |
Family
ID=5898729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7436480A Granted FR2252714A1 (en) | 1973-11-22 | 1974-10-31 | Test equipment for simplex or duplex telephone installation - uses loudspeakers and recorded test signals to determine line performance |
Country Status (4)
| Country | Link |
|---|---|
| AT (1) | AT331880B (en) |
| BE (1) | BE822203A (en) |
| DE (1) | DE2358143B2 (en) |
| FR (1) | FR2252714A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2741000C2 (en) * | 1977-09-12 | 1982-04-15 | Industronic, Industrie-Electronic Gmbh & Co Kg, 6980 Wertheim | Line-bound transmission system for speech communication and information processing |
-
1973
- 1973-11-22 DE DE19732358143 patent/DE2358143B2/en not_active Withdrawn
-
1974
- 1974-10-21 AT AT843074A patent/AT331880B/en not_active IP Right Cessation
- 1974-10-31 FR FR7436480A patent/FR2252714A1/en active Granted
- 1974-11-14 BE BE150513A patent/BE822203A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE822203A (en) | 1975-03-03 |
| FR2252714A1 (en) | 1975-06-20 |
| DE2358143B2 (en) | 1975-10-16 |
| DE2358143A1 (en) | 1975-06-05 |
| ATA843074A (en) | 1975-12-15 |
| AT331880B (en) | 1976-08-25 |