NL55722C - - Google Patents
Info
- Publication number
- NL55722C NL55722C NL101871A NL101871A NL55722C NL 55722 C NL55722 C NL 55722C NL 101871 A NL101871 A NL 101871A NL 101871 A NL101871 A NL 101871A NL 55722 C NL55722 C NL 55722C
- Authority
- NL
- Netherlands
Links
Classifications
-
- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B15/00—Supervisory desks or panels for centralised control or display
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
- H04M15/08—Metering calls to called party, i.e. B-party charged for the communication
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Testing Relating To Insulation (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1218544A GB600010A (en) | 1944-06-27 | 1944-06-27 | Improvements in or relating to electrical signalling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL55722C true NL55722C (en) | 1943-12-15 |
Family
ID=9999890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL101871A NL55722C (en) | 1944-06-27 | 1941-06-26 |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR882918A (en) |
| GB (1) | GB600010A (en) |
| NL (1) | NL55722C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2490038A (en) * | 1941-06-26 | 1949-12-06 | Int Standard Electric Corp | Electrical signaling system |
| US2598822A (en) * | 1945-10-13 | 1952-06-03 | Roelof M M Oberman | Signaling system with private branch exchange subscriber |
-
1941
- 1941-06-26 NL NL101871A patent/NL55722C/xx active
-
1942
- 1942-06-05 FR FR882918D patent/FR882918A/en not_active Expired
-
1944
- 1944-06-27 GB GB1218544A patent/GB600010A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2490038A (en) * | 1941-06-26 | 1949-12-06 | Int Standard Electric Corp | Electrical signaling system |
| US2598822A (en) * | 1945-10-13 | 1952-06-03 | Roelof M M Oberman | Signaling system with private branch exchange subscriber |
Also Published As
| Publication number | Publication date |
|---|---|
| FR882918A (en) | 1943-06-18 |
| GB600010A (en) | 1948-03-30 |