DE3134877C1 - Identification unit for user terminals - Google Patents
Identification unit for user terminalsInfo
- Publication number
- DE3134877C1 DE3134877C1 DE19813134877 DE3134877A DE3134877C1 DE 3134877 C1 DE3134877 C1 DE 3134877C1 DE 19813134877 DE19813134877 DE 19813134877 DE 3134877 A DE3134877 A DE 3134877A DE 3134877 C1 DE3134877 C1 DE 3134877C1
- Authority
- DE
- Germany
- Prior art keywords
- identification
- resistance
- field effect
- identification unit
- current
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
Alle Zenerdioden D 1 bis D 6 sind während des Identifizierens unwirksam, so daß die Feldeffekttransi- All Zener diodes D 1 to D 6 are ineffective during identification, so that the field effect transi-
storen FET1 bis FET4 auf Grund der geringen Spannung leitend werden.interfere FET1 to FET4 become conductive due to the low voltage.
Für den Widerstandswert der Identifizierung ist nur der ldentifizierungswiderstand R í bestimmend, da die ON-Widerstände der Feldeffekttransistoren FET1 bis FET4 zu vernachlässigen sind. For the resistance value of the identification, only the identification resistance is used R í determining, since the ON resistances of the field effect transistors FET1 to FET4 increase neglect.
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Claims (3)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19813134877 DE3134877C1 (en) | 1981-09-03 | 1981-09-03 | Identification unit for user terminals |
DE19823216349 DE3216349C2 (en) | 1981-09-03 | 1982-05-03 | Identification unit as a two-pole for subscriber terminals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19813134877 DE3134877C1 (en) | 1981-09-03 | 1981-09-03 | Identification unit for user terminals |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3134877C1 true DE3134877C1 (en) | 1983-01-27 |
Family
ID=6140768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19813134877 Expired DE3134877C1 (en) | 1981-09-03 | 1981-09-03 | Identification unit for user terminals |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3134877C1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3313089A1 (en) * | 1983-04-12 | 1984-10-18 | Deutsche Fernsprecher Gesellschaft Mbh Marburg, 3550 Marburg | Circuit arrangement for reducing the stimulus resistance of telephone sets |
-
1981
- 1981-09-03 DE DE19813134877 patent/DE3134877C1/en not_active Expired
Non-Patent Citations (1)
Title |
---|
NICHTS-ERMITTELT * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3313089A1 (en) * | 1983-04-12 | 1984-10-18 | Deutsche Fernsprecher Gesellschaft Mbh Marburg, 3550 Marburg | Circuit arrangement for reducing the stimulus resistance of telephone sets |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8100 | Publication of the examined application without publication of unexamined application | ||
AG | Has addition no. |
Ref country code: DE Ref document number: 3216349 Format of ref document f/p: P |
|
D1 | Grant (no unexamined application published) patent law 81 | ||
8364 | No opposition during term of opposition | ||
AG | Has addition no. |
Ref country code: DE Ref document number: 3216349 Format of ref document f/p: P |
|
AG | Has addition no. |
Ref country code: DE Ref document number: 3216349 Format of ref document f/p: P |
|
8327 | Change in the person/name/address of the patent owner |
Owner name: KRONE AG, 1000 BERLIN, DE |
|
8339 | Ceased/non-payment of the annual fee |