NL65711C - - Google Patents
Info
- Publication number
- NL65711C NL65711C NL65711DA NL65711C NL 65711 C NL65711 C NL 65711C NL 65711D A NL65711D A NL 65711DA NL 65711 C NL65711 C NL 65711C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
- H04Q5/02—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with direct connection for all subscribers, i.e. party-line systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/14—Arrangements providing for calling or supervisory signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/16—Arrangements for interconnection between switching centres in systems employing carrier frequencies
-
- 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
-
- 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
- H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
- H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2263139X | 1939-04-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL65711C true NL65711C (en:Method) |
Family
ID=10902543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL65711D NL65711C (en:Method) | 1939-04-26 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2263139A (en:Method) |
| BE (1) | BE466943A (en:Method) |
| FR (1) | FR931904A (en:Method) |
| NL (1) | NL65711C (en:Method) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2596977A (en) * | 1947-10-08 | 1952-05-20 | Int Standard Electric Corp | Ringing equipment |
-
0
- BE BE466943D patent/BE466943A/xx unknown
- NL NL65711D patent/NL65711C/xx active
-
1940
- 1940-03-05 US US322402A patent/US2263139A/en not_active Expired - Lifetime
-
1946
- 1946-08-02 FR FR931904D patent/FR931904A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE466943A (en:Method) | |
| US2263139A (en) | 1941-11-18 |
| FR931904A (fr) | 1948-03-08 |