BE519670A - - Google Patents
Info
- Publication number
- BE519670A BE519670A BE519670DA BE519670A BE 519670 A BE519670 A BE 519670A BE 519670D A BE519670D A BE 519670DA BE 519670 A BE519670 A BE 519670A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/08—Indicating faults in circuits or apparatus
- H04M3/12—Marking faulty circuits "busy"; Enabling equipment to disengage itself from faulty circuits ; Using redundant circuits; Response of a circuit, apparatus or system to an error
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/71—Substation extension arrangements
- H04M1/715—Substation extension arrangements using two or more extensions per line
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE313062X | 1952-05-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE519670A true BE519670A (de) |
Family
ID=20307662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE519670D BE519670A (de) | 1952-05-05 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE519670A (de) |
| CH (1) | CH313062A (de) |
| FR (1) | FR1076687A (de) |
| NL (2) | NL178068B (de) |
-
0
- BE BE519670D patent/BE519670A/xx unknown
- NL NL83319D patent/NL83319C/xx active
- NL NLAANVRAGE7904096,B patent/NL178068B/xx unknown
-
1953
- 1953-05-01 CH CH313062D patent/CH313062A/de unknown
- 1953-05-05 FR FR1076687D patent/FR1076687A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH313062A (de) | 1956-03-15 |
| FR1076687A (fr) | 1954-10-28 |
| NL178068B (nl) | |
| NL83319C (de) |