DE179604C - - Google Patents
Info
- Publication number
- DE179604C DE179604C DENDAT179604D DE179604DA DE179604C DE 179604 C DE179604 C DE 179604C DE NDAT179604 D DENDAT179604 D DE NDAT179604D DE 179604D A DE179604D A DE 179604DA DE 179604 C DE179604 C DE 179604C
- Authority
- DE
- Germany
- Prior art keywords
- current
- line
- direct current
- alarm
- respond
- Prior art date
- 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.)
- Active
Links
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000010287 polarization Effects 0.000 claims description 3
- 230000000881 depressing effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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
- H04Q5/06—Signalling by amplitude or polarity of DC
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Devices For Supply Of Signal Current (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE179604C true DE179604C (https=) |
Family
ID=443924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT179604D Active DE179604C (https=) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE179604C (https=) |
-
0
- DE DENDAT179604D patent/DE179604C/de active Active
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