FR636698A - - Google Patents
Info
- Publication number
- FR636698A FR636698A FR636698DA FR636698A FR 636698 A FR636698 A FR 636698A FR 636698D A FR636698D A FR 636698DA FR 636698 A FR636698 A FR 636698A
- 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
- 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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB572727A GB291510A (en) | 1927-03-01 | 1927-03-01 | Improvements in or relating to telephone systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR636698A true FR636698A (en) | 1928-04-14 |
Family
ID=9801486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR636698D Expired FR636698A (en) | 1927-03-01 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE340841A (en) |
| FR (1) | FR636698A (en) |
| GB (1) | GB291510A (en) |
| NL (1) | NL24569C (en) |
-
0
- FR FR636698D patent/FR636698A/fr not_active Expired
- BE BE340841D patent/BE340841A/xx unknown
- NL NL24569D patent/NL24569C/xx active
-
1927
- 1927-03-01 GB GB572727A patent/GB291510A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB291510A (en) | 1928-06-01 |
| NL24569C (en) | |
| BE340841A (en) |