[go: up one dir, main page]

DE364599C - Method for preventing interference on telephone lines from neighboring lines - Google Patents

Method for preventing interference on telephone lines from neighboring lines

Info

Publication number
DE364599C
DE364599C DEL50928D DEL0050928D DE364599C DE 364599 C DE364599 C DE 364599C DE L50928 D DEL50928 D DE L50928D DE L0050928 D DEL0050928 D DE L0050928D DE 364599 C DE364599 C DE 364599C
Authority
DE
Germany
Prior art keywords
lines
preventing interference
neighboring
telephone
line
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
Application number
DEL50928D
Other languages
German (de)
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.)
Individual
Original Assignee
Individual
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.)
Publication date
Priority to DEL50928D priority Critical patent/DE364599C/en
Application granted granted Critical
Publication of DE364599C publication Critical patent/DE364599C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/08Modifications for reducing interference; Modifications for reducing effects due to line faults ; Receiver end arrangements for detecting or overcoming line faults
    • H04L25/085Arrangements for reducing interference in line transmission systems, e.g. by differential transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Description

Verfahren zur Verhinderung von Störungen auf Telephonleitungen durch benachbarte Leitungen. Die Erfindung betrifft ein Verfahren zur Verhinderung von Störungen auf Telephonleitungen durch benachbarte Leitungen.Procedure for preventing interference on telephone lines neighboring lines. The invention relates to a method for preventing Interference on telephone lines from neighboring lines.

Die Erfindung besteht darin, daß die Stärke des über die Leitung gehenden Sendestromes auf das Mehrfache des für den Empfang notwendigen Stromes erhöht und an der Empfangsstelle eine Verminderung auf den normalen Empfangsstrom vorgenommen wird.The invention is that the strength of the line going The transmission current is increased to a multiple of the current required for reception and made a reduction to the normal receive current at the receiving point will.

Die Erfindung ist auf der Zeichnung in einer Abbildung dargestellt.The invention is shown in the drawing in a figure.

In dieser Abbildung wird der Mikrophonstrom durch eine Kathodenröhre i verstärkt, deren Faden durch: die Stromquelle :2 zum Glühen gebracht wird, und deren Platte durch die Stromquelle 3 gespeist wird.In this figure, the microphone is flowing through a cathode tube i reinforced whose thread is made to glow by: the power source: 2, and whose plate is fed by the power source 3.

Der Stromkreis: Gitterfaden liegt an der Sekundärwicklung eines Transformators q., dessen Primärwicklung in dem Kreis der Batterie 5 liegt, die das Mikrophon 6 enthält.The circuit: the wire mesh is on the secondary winding of a transformer q., whose primary winding is in the circuit of the battery 5, which the microphone 6 contains.

Die * Sekundärwicklung des Transformators 7 des Plattenkreises liegt an der Telephonleitung 8 und an einer künstlichen Leitung i i, die in Reihe geschaltet sind, während der Empfänger 9, zu dem ein Widerstand io im Nebenschluß liegt, zwischen den beiden Leitungen und einem Punkt der Sekundärspule des Transformators 7 liegt. Der Zweck dieser letzten Anordnung ist die Vermeidung des Larsen-Phänomens durch die Rückwirkung des Empfängers auf das Mikrophon 6.The * secondary winding of the transformer 7 of the plate circle is located on telephone line 8 and on an artificial line i i connected in series are, while the receiver 9, to which a resistor io is shunted, between the two lines and one point of the secondary coil of the transformer 7. The purpose of this last arrangement is to avoid the Larsen phenomenon through the reaction of the receiver on the microphone 6.

Der Nebenschlußwiderstand io hat den Zweck, die Lautstärke der Gegenstelle (die gleichfalls mit Verstärkung sendet) auf einen normalen Wert zurückzuführen und dabei die störenden Nebengeräusche, die auf der Leitung induziert werden, zu vermindern. An Stelle eines Widerstandes im Nebenschluß zum Hörer kann man einen Widerstand oder eine Kapazität in Reihe legen, etwaigenfalls durch einen zweiten Widerstand analog dem Widerstand io den Kreis, Hörer, Kapazität (oder Widerstand) in Nebensch,luß legen. Zu demselben Zweck könnte man einen nicht auf den Kreis angepaßten Hörer nehmen, der einen zu kleinen oder zu großen Eigenwiderstand hätte. Man könnte in gleicher Weise eine geeignete Impedanz in Reihe oder Nebenschluß zu der wirklichen Leitung legen.The purpose of the shunt resistor is to control the volume of the remote station (which also transmits with amplification) can be traced back to a normal value and thereby the annoying background noise that is induced on the line Reduce. Instead of a resistance in the shunt to the listener, you can use a Connect a resistor or a capacitance in series, if necessary with a second one Resistance analogous to resistance io the circle, earpiece, capacitance (or resistance) put in by-pass. For the same purpose, one could not be fitted to the circle Pick up a listener that has too little or too much intrinsic resistance. One could in the same way a suitable impedance in series or shunted with the real one Lay the line.

Man kann auch absichtlich eine Telephonleitung von großem Widerstand benutzen (geringer Drahtquerschnitt bei Kupfer, oder z. B. Eisenleitung), um den Wert der Störströme zu verringern; die Verwendung eines Verstärkers an der Sendestelle wird immer genügen, um den eigentlichen Telephonstrom auf einen genügenden Wert zu bringen.One can also intentionally use a phone line of great resistance use (small wire cross-section for copper, or e.g. iron line) to get the To reduce the value of the interference currents; the use of an amplifier at the transmitting station will always suffice to bring the actual telephone current to a sufficient value bring to.

Die Vergrößerung der Impedanz der Leitung kann auch dadurch künstlich erreicht werden, daß die Impedanzen längs der Leitung an verschiedenen Stellen verteilt werden.The increase in the impedance of the line can also be done artificially can be achieved that the impedances are distributed along the line at different points will.

Anstatt die Impedanzen in Reilie, kann man sie auch in I'Tebenschluß legen.Instead of the impedances in Reilie, you can also use them in shunt place.

In allen Fällen bleibt der Zweck derselbe: zu erreichen, daß alle Induktionsströme, selbst die von einer benachbarten, mit Verstärker arbeitenden Telephonleitung herrührenden, nur mit einer ganz geringen Intensität zu den beiden miteinander sprechenden Stellen gelangen. Wenn dieses Resultat erreicht ist, benutzt man dänn die Gbenerwähnten Anfangsverstärker, um einen telephonischen Verkehr auf dieser schlechten L eitun- zu gestatten.In all cases the purpose remains the same: to achieve that all Induction currents, even those from a neighboring one, working with an amplifier Telephone line, only with very little intensity to the two get to each other talking points. When this result is achieved, use it the initial amplifiers mentioned above are used to enable telephone communication to allow this bad leadership.

Claims (1)

PATENTANSPRUCH Verfahren zur Verhinderung von Störungen auf Telephonleitungen durch benachbarte Leitungen, dadurch gekennzeichnet, daß die Stärke des über die Leitung gehenden Sendestromes durch einen Verstärker auf das Mehrfache des für den Empfang notwendigen Stromes erhöht und an der Empfangsstelle eine Verminderung auf den normalen Empfangsstrom vorgenommen wird. A method for preventing interference on telephone lines from neighboring lines, characterized in that the strength of the transmission current going over the line is increased by an amplifier to a multiple of the current required for reception and a reduction to the normal reception current is made at the receiving point.
DEL50928D 1915-06-25 Method for preventing interference on telephone lines from neighboring lines Expired DE364599C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEL50928D DE364599C (en) 1915-06-25 Method for preventing interference on telephone lines from neighboring lines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEL50928D DE364599C (en) 1915-06-25 Method for preventing interference on telephone lines from neighboring lines
FR1630346X 1915-06-25

Publications (1)

Publication Number Publication Date
DE364599C true DE364599C (en) 1922-11-28

Family

ID=25985973

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL50928D Expired DE364599C (en) 1915-06-25 Method for preventing interference on telephone lines from neighboring lines

Country Status (1)

Country Link
DE (1) DE364599C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE745001C (en) * 1939-07-25 1944-02-23 Aeg Method for reducing crosstalk and other interference in telephony transmission systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE745001C (en) * 1939-07-25 1944-02-23 Aeg Method for reducing crosstalk and other interference in telephony transmission systems

Similar Documents

Publication Publication Date Title
DE1141343B (en) Circuit arrangement for telephone subscriber stations with a touch dialing device
DE1487386C3 (en) Multi-channel carrier frequency telephony transmission system
DE364599C (en) Method for preventing interference on telephone lines from neighboring lines
DE2611472A1 (en) FOUR WIRE ELECTRONIC TERMINATION
DE3129506C2 (en)
DE2654495A1 (en) TWO-WIRE-FOUR-WIRE CONVERTER
DE708943C (en) Method for the transmission of messages with shifting the speech streams on sections of the transmission line in different frequency ranges
DE3019835A1 (en) TRANSFER-FREE FORK GEAR
DE616385C (en) Arrangement for the transmission of an audio frequency band at least three octaves wide
DE578020C (en) Procedure for receiving sound waves
DE1004674B (en) Switching of a subscriber circuit in an electronic telephone exchange
DE3244240C1 (en) Telephone station with low power consumption
DE423810C (en) Subscriber station without background noise for telephone systems
DE4410058C1 (en) Circuit arrangement for charge pulse filtering
DE179606C (en)
DE3322642A1 (en) Hybrid circuit for telephone stations with amplifiers
AT131772B (en) Probing device.
DE3307552C2 (en)
DE457434C (en) Amplifier system for signal systems
DE612953C (en) Telephone system, especially for the transmission of commands, for simultaneous two-way communication from more than two call stations
DE498905C (en) Circuit arrangement for telephone systems with secret traffic
DE476077C (en) Process to increase the efficiency in feedback-free telecommunication circuits with inductively coupled artificial lines
DE355543C (en) Telephone device for use on aircraft, with two telephone stations
DE2119411C3 (en) Sertde receiving device for data transmission
DE618331C (en) Device for high-frequency telephony with two-way communication using a single carrier frequency