BE512649A - - Google Patents
Info
- Publication number
- BE512649A BE512649A BE512649DA BE512649A BE 512649 A BE512649 A BE 512649A BE 512649D A BE512649D A BE 512649DA BE 512649 A BE512649 A BE 512649A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0016—Arrangements providing connection between exchanges
-
- 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
- H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
- H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1605051A GB709399A (en) | 1951-07-06 | 1951-07-06 | Improvements in or relating to telephone systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE512649A true BE512649A (US07582779-20090901-C00044.png) |
Family
ID=10070232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE512649D BE512649A (US07582779-20090901-C00044.png) | 1951-07-06 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE512649A (US07582779-20090901-C00044.png) |
| GB (2) | GB709406A (US07582779-20090901-C00044.png) |
| NL (2) | NL83809C (US07582779-20090901-C00044.png) |
-
0
- NL NLAANVRAGE7304757,B patent/NL170585B/xx unknown
- BE BE512649D patent/BE512649A/xx unknown
- NL NL83809D patent/NL83809C/xx active
-
1951
- 1951-07-06 GB GB1971053A patent/GB709406A/en not_active Expired
- 1951-07-06 GB GB1605051A patent/GB709399A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL83809C (US07582779-20090901-C00044.png) | |
| GB709399A (en) | 1954-05-26 |
| NL170585B (nl) | |
| GB709406A (en) | 1954-05-26 |
