NL237018A - - Google Patents
Info
- Publication number
- NL237018A NL237018A NL237018A NL237018A NL237018A NL 237018 A NL237018 A NL 237018A NL 237018 A NL237018 A NL 237018A NL 237018 A NL237018 A NL 237018A NL 237018 A NL237018 A NL 237018A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
- H04Q1/4535—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted with an additional signal transmitted for voice protection
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Meter Arrangements (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1958S0057409 DE1049438B (en) | 1958-03-18 | 1958-03-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL237018A true NL237018A (en) | 1964-02-05 |
Family
ID=7491799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL237018A NL237018A (en) | 1958-03-18 | 1959-03-12 |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE573417A (en) |
| CH (1) | CH367215A (en) |
| DE (1) | DE1049438B (en) |
| FR (1) | FR1211266A (en) |
| GB (1) | GB893561A (en) |
| NL (1) | NL237018A (en) |
-
1958
- 1958-03-18 DE DE1958S0057409 patent/DE1049438B/de active Pending
- 1958-11-28 BE BE573417A patent/BE573417A/en unknown
- 1958-12-18 FR FR1211266D patent/FR1211266A/en not_active Expired
-
1959
- 1959-03-10 CH CH7060259A patent/CH367215A/en unknown
- 1959-03-12 NL NL237018A patent/NL237018A/xx unknown
- 1959-03-18 GB GB946859A patent/GB893561A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB893561A (en) | 1962-04-11 |
| FR1211266A (en) | 1960-03-15 |
| BE573417A (en) | 1959-03-16 |
| DE1049438B (en) | 1959-01-29 |
| CH367215A (en) | 1963-02-15 |