DE3036657C2 - Subscriber connection circuit for coin-operated telephones with switching means for determining the individual operating states to be monitored - Google Patents
Subscriber connection circuit for coin-operated telephones with switching means for determining the individual operating states to be monitoredInfo
- Publication number
- DE3036657C2 DE3036657C2 DE3036657A DE3036657A DE3036657C2 DE 3036657 C2 DE3036657 C2 DE 3036657C2 DE 3036657 A DE3036657 A DE 3036657A DE 3036657 A DE3036657 A DE 3036657A DE 3036657 C2 DE3036657 C2 DE 3036657C2
- Authority
- DE
- Germany
- Prior art keywords
- subscriber
- individual
- coin
- evaluation
- operating states
- 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
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
- H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
- H04M17/023—Circuit arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Interface Circuits In Exchanges (AREA)
Description
30 3b bbl 30 3b bbl
gen wird.gen will.
Zu der erfindungsgemäßen Teilnehmeranschlußschaltung gehören ferner Auswerteeinrichtungen für die Feststellung der einzelnen zu überwachenden Betriebszustände der Teilnehmeranschlußleitung, die über jeweils einen eigenen Spannungsteiler fest an die Teilnehmeranschlußleitung angeschlossen sind. In der Figur sind lediglich die Auswerteeinrichtung und der zugehörige Spannungsteiler detailliert dargestellt, die der Anreizindikation dienen, also der Anzeige, daß bei der Teilnehmerstation ein Verbindungswunsch vorliegt Sie sind in ihrer Gesamtheit mit A/bezeichnet.The subscriber line circuit according to the invention also includes evaluation devices for the determination of the individual operating states to be monitored of the subscriber line that have each have their own voltage divider firmly connected to the subscriber line. In the figure only the evaluation device and the associated voltage divider are shown in detail, that of the incentive indication serve, so the display that there is a connection request at the subscriber station you are designated in their entirety with A /.
Die Auswerteeinrichtung für die Anreiziindikation ist in Form eines Operationsverstärkers OP realisiert, dessen nicht invertierender Eingang an den Teilerpunkt eines aus den Widerständen R 1 und R1 bestehenden Spannungsteilers besteht, der zwischen der a-Ader der Teilnehmeranschlußleitung und Erdpotential angeschlossen ist. Der invertierende Eingang des Operationsverstärkers ist an einen Teilerpunkt eines aus den Widerständen R 3, R 4 und R 5 bestehenden Spannungsteiler angeschlossen, der zwischen Erüpotential und der 6-Ader der Teilnehmeranschlußleituiig liegt Über einen weiteren Widerstand R 6 ist eine Verbindung der Widerstände RA und R 5 mit dem negativen Pol der Speisebatterie hergestellt Hierdurch wird eine negative Bezugsspannung für den invertierenden Eingang des Operationsverstärkers OP in derartiger Größe erzeugt, daß für die Schaltschwelle, die für diesen Operationsverstärker festgelegt worden ist und bei dem Schleifenwiderstand, der für die Durchführung der betreffenden Indikation, hier der Anreizindikation zugrunde gelegt wird, die Spannungen an den beiden Eingängen des Operationsverstärkers gleich groß sind, solange das festzustellende Kriterium, hier der Anreiz, nicht vorliegt. The evaluation device for the incentive indication is implemented in the form of an operational amplifier OP , the non-inverting input of which is at the divider point of a voltage divider consisting of resistors R 1 and R1 , which is connected between the a-wire of the subscriber line and ground potential. The inverting input of the operational amplifier is connected to a dividing point of a voltage divider consisting of resistors R 3, R 4 and R 5 , which is between Erüpotential and the 6-wire of the subscriber connection line. Via a further resistor R 6 , the resistors RA and R are connected 5 with the negative pole of the supply battery.This creates a negative reference voltage for the inverting input of the operational amplifier OP in such a size that for the switching threshold that has been set for this operational amplifier and for the loop resistance that is required for the implementation of the relevant indication, The basis of the incentive indication is that the voltages at the two inputs of the operational amplifier are the same as long as the criterion to be determined, here the incentive, is not present.
Die den übrigen Indikationen, nämlich der Schleifenschlußindikation, der Münzerindikation, der Rufindikation und der Erdindikation dienenden Schaltungsteile SJ, MJ, RJ und EJ sind in entsprechender Weise aufgebaut, weisen also ebenfalls einen Operationsverstärker als Auswerteorgan sowie einen Spannungsieiler auf, über den dieser Operationsverstärker an die Adern der Teilnehmeranschlußleitung angeschlossen ist. The circuit parts SJ, MJ, RJ and EJ used for the other indications, namely the loop closure indication, the coin indication, the call indication and the earth indication, are constructed in a corresponding manner, so they also have an operational amplifier as an evaluation device and a voltage conductor via which this operational amplifier is connected to the Wires of the subscriber line is connected.
Die Entscheidung darüber, von welchem Operationsverstärker aus ein gegebenenfalls geliefertes Ausgangssignal zur Auswertung gelangt, wird durch entsprechende Verknüpfung dieser Ausgangssignale mit bestimmten Betriebjparametern getroffen, von denen es auch abhängig ist, welcher Speisewiderstand bzw. welche Speisewiderstandskombina'ion wirksam ist.The decision about from which operational amplifier a possibly supplied output signal comes to the evaluation, is by appropriate linking of these output signals with certain Operating parameters taken, on which it is also dependent on which feed resistor or which Feed resistance combination is effective.
Wie in der Figur durch Strichpunktierung angedeutet, stellen alle die genannten Spannungsteiler und Speisewiderstände eine Baueinheit dar, die vorzugsweise eine Schichtschaltung ist. Hierdurch ergeben sich die eingangs ewähnten Vorteile.As indicated in the figure by dash-dotted lines, all represent the voltage dividers and supply resistors mentioned represents a structural unit, which is preferably a layer circuit. This results in the initially mentioned advantages.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
6060
6565
Claims (2)
ehe Art der Betriebszustandsüberwachung vorgenom- Schließlich gewährleistet die Zusammenfassung der men werden soll, wird diese Auswerteeinrichtung über 45 den einzelnen Auswerteeinrichtungen individuell zugeein gesondertes Widerstandsanpassungsnetzwerk an ordneten Spannungsteiler und Speisewiderstände zu eidie betreffende zu überwachende Teilnehmeranschluß- ner Baueinheit eine einheitliche Temperaturabhängigschaltung angeschaltet wobei auch die Speisung der keit sowie die Möglichkeit einer einheitlichen Abglei-Teilnehmeranschlußleitung über gesonderte, der jewei- chung der Widerstände, wodurch die Einhaltung enger ligen Überwachung angepaßte Speisewiderstände er- 50 Auswertetolerazen möglich ist
folgt Nachstehend wird die Erfindung anhand eines Aus-In known telephone systems, a central multiplexer is available as well as when switching from an evaluation device for determining the type of indication to be monitored in the other operating states in the known solution, several of which can occur and which serve a main cause for the subscriber lines. which are insufficient evaluation reliability,
Before the type of operating status monitoring is to be carried out, this evaluation device is ultimately assigned to the individual evaluation devices via 45 individual evaluation devices as well as the possibility of a uniform equalizing subscriber connection line via separate, the respective resistors, whereby the observance of narrow monitoring adapted feed resistances is possible
The invention is described below on the basis of an embodiment
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3036657A DE3036657C2 (en) | 1980-09-29 | 1980-09-29 | Subscriber connection circuit for coin-operated telephones with switching means for determining the individual operating states to be monitored |
ZA816705A ZA816705B (en) | 1980-09-29 | 1981-09-28 | Subscriber connection circuit for coin operated telephones |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3036657A DE3036657C2 (en) | 1980-09-29 | 1980-09-29 | Subscriber connection circuit for coin-operated telephones with switching means for determining the individual operating states to be monitored |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3036657A1 DE3036657A1 (en) | 1982-06-16 |
DE3036657C2 true DE3036657C2 (en) | 1985-09-05 |
Family
ID=6113103
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3036657A Expired DE3036657C2 (en) | 1980-09-29 | 1980-09-29 | Subscriber connection circuit for coin-operated telephones with switching means for determining the individual operating states to be monitored |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE3036657C2 (en) |
ZA (1) | ZA816705B (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2547880C2 (en) * | 1975-10-25 | 1981-09-24 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Circuit arrangement for recognizing the operating states of a subscriber line and for connecting and disabling calls in telephone exchanges |
CH634187A5 (en) * | 1978-10-10 | 1983-01-14 | Sodeco Compteurs De Geneve | Detector circuit for telephone networks |
-
1980
- 1980-09-29 DE DE3036657A patent/DE3036657C2/en not_active Expired
-
1981
- 1981-09-28 ZA ZA816705A patent/ZA816705B/en unknown
Also Published As
Publication number | Publication date |
---|---|
ZA816705B (en) | 1982-09-29 |
DE3036657A1 (en) | 1982-06-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |