DE3139598A1 - Circuit arrangement for recording telecommunications traffic - Google Patents

Circuit arrangement for recording telecommunications traffic

Info

Publication number
DE3139598A1
DE3139598A1 DE19813139598 DE3139598A DE3139598A1 DE 3139598 A1 DE3139598 A1 DE 3139598A1 DE 19813139598 DE19813139598 DE 19813139598 DE 3139598 A DE3139598 A DE 3139598A DE 3139598 A1 DE3139598 A1 DE 3139598A1
Authority
DE
Germany
Prior art keywords
circuit arrangement
transformer
voltage
traffic
comparator
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.)
Granted
Application number
DE19813139598
Other languages
German (de)
Other versions
DE3139598C2 (en
Inventor
Heinz Ing.(grad.) 7151 Allmersbach Hermentin
Klaus Ing.(grad.) 7150 Backnang Kirschke
Joel Dr.-Ing. 7151 Auenwald Korn
Wolfgang Dr.-Ing. 7056 Weinstadt Schmidt
Rudolf Dipl.-Ing. 7157 Sulzbach/Murr Weller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bosch Telecom GmbH
Original Assignee
AEG Telefunken Nachrichtentechnik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by AEG Telefunken Nachrichtentechnik GmbH filed Critical AEG Telefunken Nachrichtentechnik GmbH
Priority to DE19813139598 priority Critical patent/DE3139598A1/en
Publication of DE3139598A1 publication Critical patent/DE3139598A1/en
Application granted granted Critical
Publication of DE3139598C2 publication Critical patent/DE3139598C2/de
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/36—Statistical metering, e.g. recording occasions when traffic exceeds capacity of trunks
    • 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
    • G01R19/145—Indicating the presence of current or voltage
    • G01R19/15—Indicating the presence of current

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Dc Digital Transmission (AREA)

Abstract

Circuit arrangement for recording analog telecommunications traffic on lines of a communications network by means of sensors, characterised in that a transformer (Ü) is provided as a sensor for the traffic in one transmission band, having a primary winding through which the line current flows, in that the secondary winding of the transformer is terminated with a low-impedance resistor (R) which is adapted to the inductance of the transformer in such a way that its value transformed to the primary side corresponds approximately to the impedance of the primary winding at the mid-band frequency, in that a high-power amplifier (V) is connected downstream from the resistor (R), in that the amplified signal is compared by means of a comparator (K) with a reference voltage (U) and in that the output of the comparator (K) is terminated with an integrator (I), at whose output a voltage can be tapped during traffic flow. <IMAGE>

Description

Schaltungsanordnung zur Rernmeldeverkehrserfassung Circuit arrangement for traffic registration

Die Erfindung betrifft eine Schaltungsanordnung zur Erfassung des analogen Fernmldeverkehrs auf Leitungen eines Nachrichtennetzes mittels Sensoren.The invention relates to a circuit arrangement for detecting the analog telecommunication traffic on lines of a communication network by means of sensors.

Eine solche Schaltungsanordnung wird insbesondere auf festgeschalteten vermieteten Leitungen von postalischen Nachrihtennetzen benötigt.Such a circuit arrangement is used in particular on dedicated leased lines from postal communication networks are required.

Aufgabe der Erfindung war es, eine Schaltungsanordnung der obigen Art anzugeben, durch welche die auf einer Leitung vorhandenen Störsignale unterdrückt oder vermindert werden und durch welche die Leitungssymmetrie und die Dämpfung nicht oder nur unwesentlich verschlechtert bzw. erhöht werden.The object of the invention was to provide a circuit arrangement of the above Specify the type by which the interference signals present on a line are suppressed or are reduced and by which the line symmetry and the attenuation are not or only marginally deteriorated or increased.

Die Lösung erfolgt.mit denen in'Patentansprüchen angegebenen Mitteln.The solution takes place with the means specified in the patent claims.

Durch die erfindungsgemäße Sehaltungsanordnung wird'eine Schwächung der ausgewerteten Störsignale erreicht. Diese Störsignale entstehen durch kapazitive oder induktive Ein- kopplung entlang der Leitungen und erreichen bisweilen Spannungswerte von der Größenordnung der Fernsprechnutzsignale. Da die erfindungsgemäße Sensoranordnung jedoch nicht die Spannung zwischen zwei Leitungsadern, sondern den Strom in den Adern auswertet und die Störsignale bei ruhendem Verkehr wegen des hohen Abschlußwiderstandes des Fernmeldekreises und wegen der losen Kopplung der Störspannungsquelle lediglich einen kleinen Strom-zur Folge hat, kann damit eine fehlerh-afte Verkehrsanzeige, hervorgerufen durch die genannten Störungen, sogut wie ausgeschlossen werden.The posture arrangement according to the invention results in a weakening of the evaluated interfering signals is reached. These interfering signals are caused by capacitive ones or inductive input coupling along the lines and achieve sometimes voltage values of the order of magnitude of the useful telephone signals. Since the sensor arrangement according to the invention but not the voltage between two line wires, but evaluates the current in the veins and the interfering signals in stationary traffic because of the high terminating resistance of the telecommunications circuit and because of the loose coupling the interference voltage source only has a small current result, can thus an erroneous traffic display, caused by the malfunctions mentioned, as well as excluded.

Eine weitere Verbesserung des VerhältniSses- von Nutzsignal zu Störsignal wird durch die Anpassung des Widerstandes an die Induktivität des Übertragers im Ubertragungsfrequenzband erreicht, da die Störfrequenzen in der Regel außerhalb des Maximums des Übertragungsbandes liegen.A further improvement in the ratio of useful signal to interference signal is achieved by adapting the resistance to the inductance of the transformer in the Transmission frequency band reached, since the interference frequencies usually outside of the maximum of the transmission band.

In einer Ausgestaltung der Erfindung weist der Übertrager zwei gleiche Primärwicklungshälften auf, die jeweils in eine Ader der Leitung gleichsinnig eingefügt sind, wodurch die Symmetrieverhältnisse der Leitung kaum beeinflusst werden.In one embodiment of the invention, the transformer has two identical ones Primary winding halves, each inserted in the same direction in a wire of the line are, so that the symmetry of the line is hardly affected.

In einer anderen Ausgestaltung der Erfindung ist- dem Verstärker ein für die Signale des Übertragungsbandes durchlässiger Bandpaß gleicher Bandbreite nachgeschaltet, wodurch ebenso wie durch den Komparator die Reststörspannungen unterdrückt werden.In another embodiment of the invention, the amplifier is a Bandpass filter of the same bandwidth that is permeable for the signals of the transmission band downstream, which, as well as the comparator, suppresses the residual interference voltages will.

In einer anderen Ausgestaltung.der Erfindung wird der Hochpaßanteil der Bandpaßfilterung ersetzt durch eine Abtastung des verstärkten Signals mit einer Rechteckspannung der doppelten Grenzfrequenz des Übertragungsbandes.In another embodiment of the invention, the high-pass component the bandpass filtering is replaced by a sampling of the amplified signal with a Square-wave voltage of twice the cut-off frequency of the transmission band.

Die Figur zeigt ein -Ausführungsbeispiel der Erfindung. Der Fernsprechverkehr auf der Leitung L zwischen Teilnehmer T und Vermittlungsstelle soll gemessen werden. Erfindungsgemäß sind die beiden Primärwicklungshälften des Übertragers ü in je eine Ader der Leitung geschleift. Ausgangsseitig ist der Übertrager mit einem niederohmigen Widerstand R abgeschlossen, an dem der transformierte Leitungsstrom einen Spannungsabfall verursacht, der wiederum durch den Verstärker V verstärkt wird. Anschließend wird das verstärkte Signal mittels Bandpaß F gefiltert und einem Komparator K zugeführt, durch den mit der Referenzspannung U verglichen wird. Am Ausgang des Komparators ist ein RC-Integrator angeschlossen, dessen Ausgang eine Gleichspannung liefert, die darüber aussagefähig ist, ob Verkehr herrscht oder ob sich der Kreis im Ruhezustand befindet. Zweckmässigerweise wird am Integratorausgang ein zweiter Komparator angeschlossen, mit dessen Schwelle eventuell- noch verbleibende kurze Störimpulse unterdrUckt werden können.The figure shows an embodiment of the invention. Telephone traffic on the line L between subscriber T and the exchange is to be measured. According to the invention are the two primary winding halves of the transformer ü looped into one wire each of the line. The transformer is on the output side a low-resistance resistor R completed, at which the transformed line current causes a voltage drop, which in turn amplifies V through the amplifier will. The amplified signal is then filtered using bandpass filter F and a Comparator K is supplied by which the reference voltage U is compared. At the The output of the comparator is connected to an RC integrator, the output of which is a Provides direct voltage that is indicative of whether there is traffic or whether the circle is idle. Appropriately, at the integrator output a second comparator is connected, with its threshold possibly still remaining short glitches can be suppressed.

LeerseiteBlank page

Claims (5)

Patentansprüche 0 Schaltungsanordnung zur Erfassung des analogen Fernmeldeverkehrs auf Leitungen eines Nachrichtennetzes mittels Sensoren, dadurch gekennzeichnet, daß als Sensor für den Verkehr in einem Übertragungsband ein übertrager (ü) mit einer Primärwicklung vorgesehen ist, durch die der Leitungsstrom fließt, daß die Sekundärwicklung des Übertragers mit einem niederohmigen Widerstand (R) abgeschlossen ist, der an die Induktivität des Übertragers derart angepaßt ist, daß sind auf die. Primärseite transformierter Wert etwa der Impedanz der Primärwicklung bei der Bandmittenfrequenz entspricht, daß dem Widerstand (R) ein Verstärker (V) hoher Verstärkung nachgeschaltet ist, daß das verstärkte Signal mittels eines Komparator (K) mit einer Referenzspannung (U) verglichen wird und daß der Ausgang der Komparators (K) mit einem Integrator (I) abgeschlossen ist, an dessen Ausgang bei Verkehr eine Spannung abgreifbar ist. Claims 0 circuit arrangement for detecting the analog Telecommunication traffic on lines of a communication network by means of sensors, thereby characterized in that a transmitter is used as a sensor for the traffic in a transmission band (ü) is provided with a primary winding through which the line current flows, that the secondary winding of the transformer with a low resistance (R) is completed, which is adapted to the inductance of the transformer in such a way that that are on the. Primary side transformed value for example the impedance of the primary winding at the band center frequency corresponds to the resistor (R) being an amplifier (V) high gain is connected downstream that the amplified signal by means of a comparator (K) is compared with a reference voltage (U) and that the output of the comparator (K) is completed with an integrator (I), at the output of which a Voltage can be tapped. 2. Schaltungsanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die-Primärwicklung des Übertragers zwei gleiche Hälften aufweist, die jeweils in eine Ader der Leitung (L) derart eingefügt sind, daß der Leitungsstrom in ihnengleichsinnig wirkt. 2. Circuit arrangement according to claim 1, characterized in that the primary winding of the transformer is two equal Has halves, which are each inserted into a wire of the line (L) in such a way that the line current acts in the same direction in them. 3. Schaltungsanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Ref.erenzspannung (U) eine Gleichspannung ist.3. Circuit arrangement according to one of the preceding claims, characterized characterized in that the reference voltage (U) is a direct voltage. 4. Schaltungsanordnung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß dem Verstärker .(V) ein für die Signale des Übertragungsbandes durchlässiger Bandpaß (F) gleicher Bandbreite nachgeschaltet ist.4. Circuit arrangement according to claim 1, 2 or 3, characterized in that that the amplifier (V) is a more permeable for the signals of the transmission band Bandpass filter (F) of the same bandwidth is connected downstream. 5. Schaltungsanordnung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß das verstärkte Signal mit einer Rechteckspannung der doppelten Grenzfrequenz des Übertragungsbandes abgetastet wird.5. Circuit arrangement according to claim 1, 2 or 3, characterized in that that the amplified signal with a square wave voltage of twice the cutoff frequency of the transfer belt is scanned.
DE19813139598 1981-10-06 1981-10-06 Circuit arrangement for recording telecommunications traffic Granted DE3139598A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19813139598 DE3139598A1 (en) 1981-10-06 1981-10-06 Circuit arrangement for recording telecommunications traffic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813139598 DE3139598A1 (en) 1981-10-06 1981-10-06 Circuit arrangement for recording telecommunications traffic

Publications (2)

Publication Number Publication Date
DE3139598A1 true DE3139598A1 (en) 1983-06-16
DE3139598C2 DE3139598C2 (en) 1989-09-07

Family

ID=6143454

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19813139598 Granted DE3139598A1 (en) 1981-10-06 1981-10-06 Circuit arrangement for recording telecommunications traffic

Country Status (1)

Country Link
DE (1) DE3139598A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3205817A1 (en) * 1982-02-18 1983-08-25 AEG-Telefunken Nachrichtentechnik GmbH, 7150 Backnang Method for traffic recording of analog telephony signals and circuit arrangement to carry out this method
DE3240663A1 (en) * 1982-11-04 1984-05-10 ANT Nachrichtentechnik GmbH, 7150 Backnang Method for recording traffic on telecommunications lines
DE3243769A1 (en) * 1982-11-26 1984-05-30 ANT Nachrichtentechnik GmbH, 7150 Backnang Method of traffic sensing on telecommunication lines
WO2015014683A1 (en) * 2013-07-30 2015-02-05 Sma Solar Technology Ag Apparatus for detecting ac components in a dc circuit and use of the apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2138210A1 (en) * 1971-01-12 1972-08-03 Zellweger Uster Ag Method and device for interference suppression and application of the method
DD127199A1 (en) * 1976-07-01 1977-09-14
DE2736783A1 (en) * 1977-08-16 1979-02-22 Danfoss As LIMIT VALUE SIGNAL DEVICE FOR ALTERNATING SIGNALS
DE2930733A1 (en) * 1979-07-28 1981-01-29 Vierling Oskar Data collection for toll on telecommunication lines - uses transmission sensors sampled and tested by computer
DE3017623A1 (en) * 1980-05-08 1981-11-12 Vierling, Oskar, Prof. Dr.Phil.Habil., 8553 Ebermannstadt Traffic sensor for telephone lines - has evaluating circuit and amplitude limiting threshold value circuit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2138210A1 (en) * 1971-01-12 1972-08-03 Zellweger Uster Ag Method and device for interference suppression and application of the method
DD127199A1 (en) * 1976-07-01 1977-09-14
DE2736783A1 (en) * 1977-08-16 1979-02-22 Danfoss As LIMIT VALUE SIGNAL DEVICE FOR ALTERNATING SIGNALS
DE2930733A1 (en) * 1979-07-28 1981-01-29 Vierling Oskar Data collection for toll on telecommunication lines - uses transmission sensors sampled and tested by computer
DE3017623A1 (en) * 1980-05-08 1981-11-12 Vierling, Oskar, Prof. Dr.Phil.Habil., 8553 Ebermannstadt Traffic sensor for telephone lines - has evaluating circuit and amplitude limiting threshold value circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3205817A1 (en) * 1982-02-18 1983-08-25 AEG-Telefunken Nachrichtentechnik GmbH, 7150 Backnang Method for traffic recording of analog telephony signals and circuit arrangement to carry out this method
DE3240663A1 (en) * 1982-11-04 1984-05-10 ANT Nachrichtentechnik GmbH, 7150 Backnang Method for recording traffic on telecommunications lines
DE3243769A1 (en) * 1982-11-26 1984-05-30 ANT Nachrichtentechnik GmbH, 7150 Backnang Method of traffic sensing on telecommunication lines
WO2015014683A1 (en) * 2013-07-30 2015-02-05 Sma Solar Technology Ag Apparatus for detecting ac components in a dc circuit and use of the apparatus
US10436821B2 (en) 2013-07-30 2019-10-08 Sma Solar Technology Ag Apparatus for detecting AC components in a DC circuit and use of the apparatus

Also Published As

Publication number Publication date
DE3139598C2 (en) 1989-09-07

Similar Documents

Publication Publication Date Title
DE2713710C2 (en) Remote-fed repeater for communication links
DE3139598A1 (en) Circuit arrangement for recording telecommunications traffic
DE2853057A1 (en) CIRCUIT ARRANGEMENT FOR COMPENSATION OF THE DC CURRENTS FLOWING IN A LINE TRANSFER FOR TELEVISION SYSTEMS
EP0040785B1 (en) Transformerless hybrid circuit
DE4308783C1 (en) Information signal transmission circuitry for telephone network - with system module at each end of two=wire subscriber line providing two=wire to four=wire interface
DE2449281A1 (en) DOUBLE-DIRECTIONAL TWO-WIRE AMPLIFIER FOR TELEPHONE SYSTEMS
EP0209716B1 (en) Circuit for the suppression of perturbing signals on the reception branch line of a subscriber line circuit realized by electronic components without the use of a voice transformer
DE1067853B (en) Circuit arrangement for suppressing low-frequency interference voltages
DE2504785B2 (en) Circuit arrangement for the floating transmission of signals via isolating points in telecommunications systems
DE2202501A1 (en) FOUR-POLE CONSTRUCTION OF NEGATIVE RESISTORS FOR LOW-REFLECTION ATTENUATION OF A TWO-WIRE CABLE
DE3611226C2 (en)
EP1325606A2 (en) Telephone for connection to a public telephone network
DE4100778C1 (en)
DE1272466B (en) Crossover for the separation of a signal current and a supply current and its use in amplifier circuits
DE1110249B (en) Push-pull modulator
DE3322642A1 (en) Hybrid circuit for telephone stations with amplifiers
DE459292C (en) High frequency messaging system
DE2643646A1 (en) DEVICE FOR DETECTING A SOUND SIGNAL
DE2439800A1 (en) COAXIAL LINE WITH LINE AMPLIFIER FOR BROADBAND SIGNALS
DE2647344C2 (en) Decoupling device for a carrier frequency system
EP0037518A1 (en) Transformerless hybrid circuit
DE2314116C3 (en) System for the transmission of data signals
DE2404957A1 (en) CIRCUIT ARRANGEMENT FOR THE TRANSFER OF DATA IN THE BASEBAND
DE2138210A1 (en) Method and device for interference suppression and application of the method
DE1931241C (en) Echo equalizer with matching network

Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8127 New person/name/address of the applicant

Owner name: ANT NACHRICHTENTECHNIK GMBH, 7150 BACKNANG, DE

8110 Request for examination paragraph 44
D2 Grant after examination
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee