DE2527933A1 - - Google Patents
Info
- Publication number
- DE2527933A1 DE2527933A1 DE19752527933 DE2527933A DE2527933A1 DE 2527933 A1 DE2527933 A1 DE 2527933A1 DE 19752527933 DE19752527933 DE 19752527933 DE 2527933 A DE2527933 A DE 2527933A DE 2527933 A1 DE2527933 A1 DE 2527933A1
- Authority
- DE
- Germany
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/28—Reducing interference caused by currents induced in cable sheathing or armouring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
- G01R19/1658—AC voltage or recurrent signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
- H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19752527933 DE2527933C2 (en) | 1975-06-23 | Method and circuit arrangement for the determination of external DC voltages independent of interference voltage in telecommunication systems, in particular telephone systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19752527933 DE2527933C2 (en) | 1975-06-23 | Method and circuit arrangement for the determination of external DC voltages independent of interference voltage in telecommunication systems, in particular telephone systems |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2527933B1 DE2527933B1 (en) | 1976-09-09 |
| DE2527933A1 true DE2527933A1 (en) | 1976-09-09 |
| DE2527933C2 DE2527933C2 (en) | 1977-04-14 |
Family
ID=
Also Published As
| Publication number | Publication date |
|---|---|
| DE2527933B1 (en) | 1976-09-09 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| E77 | Valid patent as to the heymanns-index 1977 | ||
| 8339 | Ceased/non-payment of the annual fee |