BE351197A - - Google Patents
Info
- Publication number
- BE351197A BE351197A BE351197DA BE351197A BE 351197 A BE351197 A BE 351197A BE 351197D A BE351197D A BE 351197DA BE 351197 A BE351197 A BE 351197A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
- H04M3/64—Arrangements for signalling the number or class of the calling line to the operator
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR654299T | 1928-05-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE351197A true BE351197A (zh) |
Family
ID=9006415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE351197D BE351197A (zh) | 1928-05-14 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE351197A (zh) |
| FR (1) | FR654299A (zh) |
| NL (1) | NL26285C (zh) |
-
0
- BE BE351197D patent/BE351197A/xx unknown
- NL NL26285D patent/NL26285C/xx active
-
1928
- 1928-05-14 FR FR654299D patent/FR654299A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL26285C (zh) | |
| FR654299A (fr) | 1929-04-04 |