BE500568A - - Google Patents
Info
- Publication number
- BE500568A BE500568A BE500568DA BE500568A BE 500568 A BE500568 A BE 500568A BE 500568D A BE500568D A BE 500568DA BE 500568 A BE500568 A BE 500568A
- 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
- H04Q1/45—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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Devices For Supply Of Signal Current (AREA)
- Exchange Systems With Centralized Control (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE696503X | 1950-01-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE500568A true BE500568A (US20090163788A1-20090625-C00002.png) |
Family
ID=20315345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE500568D BE500568A (US20090163788A1-20090625-C00002.png) | 1950-01-12 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE500568A (US20090163788A1-20090625-C00002.png) |
| FR (1) | FR1032717A (US20090163788A1-20090625-C00002.png) |
| GB (1) | GB696503A (US20090163788A1-20090625-C00002.png) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1539001A (fr) * | 1967-05-05 | 1968-09-13 | Materiel Telephonique | Système de liaison radiotéléphonique |
| US3564150A (en) * | 1968-06-18 | 1971-02-16 | Int Standard Electric Corp | Mobile radio telephone and paging system |
-
0
- BE BE500568D patent/BE500568A/xx unknown
-
1951
- 1951-01-12 GB GB948/51A patent/GB696503A/en not_active Expired
- 1951-01-12 FR FR1032717D patent/FR1032717A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1032717A (fr) | 1953-07-03 |
| GB696503A (en) | 1953-09-02 |
