NL24569C - - Google Patents
Info
- Publication number
- NL24569C NL24569C NL24569DA NL24569C NL 24569 C NL24569 C NL 24569C NL 24569D A NL24569D A NL 24569DA NL 24569 C NL24569 C NL 24569C
- Authority
- NL
- Netherlands
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 |
|---|---|
| NL24569C true NL24569C (en:Method) |
Family
ID=9801486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL24569D NL24569C (en:Method) | 1927-03-01 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE340841A (en:Method) |
| FR (1) | FR636698A (en:Method) |
| GB (1) | GB291510A (en:Method) |
| NL (1) | NL24569C (en:Method) |
-
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 |
|---|---|
| BE340841A (en:Method) | |
| GB291510A (en) | 1928-06-01 |
| FR636698A (en:Method) | 1928-04-14 |