DE726045C - Arrangement for the transmission of messages - Google Patents

Arrangement for the transmission of messages

Info

Publication number
DE726045C
DE726045C DEL90279D DEL0090279D DE726045C DE 726045 C DE726045 C DE 726045C DE L90279 D DEL90279 D DE L90279D DE L0090279 D DEL0090279 D DE L0090279D DE 726045 C DE726045 C DE 726045C
Authority
DE
Germany
Prior art keywords
traffic
frequency
arrangement
telephone
messages
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
DEL90279D
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.)
Alcatel Lucent Deutschland AG
Original Assignee
Standard Elektrik Lorenz AG
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
Priority to DEL85522D priority Critical patent/DE708943C/en
Priority to DEL90245D priority patent/DE726511C/en
Application filed by Standard Elektrik Lorenz AG filed Critical Standard Elektrik Lorenz AG
Priority to DEL90279D priority patent/DE726045C/en
Priority to NL82857A priority patent/NL50600C/xx
Priority to FR823122D priority patent/FR823122A/en
Priority to GB18436/37A priority patent/GB501915A/en
Priority to US153074A priority patent/US2184835A/en
Priority to DEL99627D priority patent/DE730055C/en
Application granted granted Critical
Publication of DE726045C publication Critical patent/DE726045C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/78—Circuit arrangements in which low-frequency speech signals proceed in one direction on the line, while speech signals proceeding in the other direction on the line are modulated on a high-frequency carrier signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Prepayment Telephone Systems (AREA)
  • Interface Circuits In Exchanges (AREA)

Description

Anordnung zur übertragung von Nachrichten Es ist bereits vorgeschlagen, den von einer Fernsprechstation abgehenden Verkehr niederfrequent und den dort eingehenden Verkehr hochfrequent durchzuführen. Dabeiwird der in der Fernsprechstation vorgesehene Fernhörer einerseits unmittelbar, gegebenenfalls über Tiefpaßfilter, anderseits über einen Hochfrequenzgleichrichter@ und Hochpaßfilter an die Sprechadern angeschlossen, wobei ferner das Mikrophon der Fernsprechstation über Tiefpaßfilter an die gleichen Adern angeschlossen ist. Diese Anordnung hat den Nachteil, daß der Sprechende die eigenen Worte in seinem Hörer vernimmt.Arrangement for the transmission of messages It has already been proposed the outgoing traffic from a telephone station and the incoming traffic at low frequencies Carry out high-frequency traffic. This is the one provided in the telephone station Remote receiver on the one hand directly, possibly via low-pass filter, on the other hand connected to the speech wires via a high-frequency rectifier @ and high-pass filter, furthermore the microphone of the telephone station being connected to the same via low pass filters Wires is connected. This arrangement has the disadvantage that the speaker has the hears his own words in his listener.

Vorliegende Erfindung vermeidet diesen Nachteil dadurch, daß eine Umschaltung der Teilnehmerstation von der einen Betriebsart (Verkehr in beiden Richtungen niederfrequent) auf die andere Betriebsart (abgehender Verkehr niederfrequent, ankommender Verkehr trägerfrequent) durch von der Vermittlungsstelle betätigte Schaltmittel stattfindet. Dabei ist es vorteilhaft, die bei Niederfrequenzverkehr vorhandene Gabeldämpfung des Mikrophons bei der zweiten Betriebsart aufzuheben.The present invention avoids this disadvantage in that a Switching of the subscriber station from one operating mode (traffic in both directions low frequency) to the other operating mode (outgoing traffic low frequency, incoming traffic Traffic carrier frequency) by switching means operated by the exchange takes place. It is advantageous to use the one that is present in the case of low-frequency traffic Cancel the fork attenuation of the microphone in the second operating mode.

Die Abbildung zeigt eine beispielsweise Ausführung der erfindungsgemäßen Schaltungsanordnung. Bei reinem Niederfrequenzverkehr wird eine normale Gabelschaltung mit dem Mikrophon 11T und dem Telephon T über das Tiefpaßfilter N an die Sprechadern a, b gelegt: Bei Übergang zur zweiten Betriebsart wird ein Relais A über einen Kondensator durch von der Vermittlungsstelle ausgehenden Gleichstrom in an sich bekannter Weise erregt, dadurch der Kontaktaa geschlossen, der das Halten des Relais bewirkt, solange die Gleichspannung vorhanden ist, ferner wird der Kontakt a, geöffnet und der Kontakt a, umgelegt. Durch die öffnung des Kontaktes-a, ist erreicht, daß das Mikrophon ohne die unerwünschte Gabeldämpfung an den Sprechadern liegt, während durch den Kontakt a. das Telephon über einen Hochfrequenzgleichrichter GL und das Hochpaßfil-'terN "an die Fernsprechadern angeschlossen-ist.The figure shows an example of an embodiment of the circuit arrangement according to the invention. In the case of pure low-frequency traffic, a normal hybrid circuit with the microphone 11T and the telephone T is connected to the speech wires a, b via the low-pass filter N. When switching to the second operating mode, a relay A is connected to a capacitor by direct current from the exchange in a known manner energized, thereby closing the contact aa, which holds the relay as long as the DC voltage is present, furthermore the contact a, is opened and the contact a, is switched. By opening the contact-a, it is achieved that the microphone lies on the speech wires without the undesired fork attenuation, while the contact a. the telephone is connected to the telephone wires via a high-frequency rectifier GL and the high-pass filter.

Durch die erfindungsgemäße Schaltungsanordnung- wird eine Umschaltung von der einen auf die andere Betriebsart ohne Mitwirkung des Teilnehmers erreicht und auch eine unerwünschte Gabeldämpfung der Mikrophonströme vermieden.The circuit arrangement according to the invention results in a switchover achieved from one mode of operation to the other without the participation of the participant and also an undesirable fork attenuation of the microphone currents avoided.

Claims (3)

PATENTANSPRÜCHE: i. Anordnung zur Übertragung von Nachrichten, bei der der Verkehr entweder in beiden Verkehrsrichtungen niederfrequent oder der von der Fernsprechstation abgehende Verkehr niederfrequent und der ankommende Verkehr trägerfrequent durchgeführt wird, dadurch gekennzeichnet, daß durch von der Vermittlungsstelle betätigte Schaltmittel eine Urschaltung der Teilnehmerstation von der ersten auf die zweite Betriebsart stattfindet. PATENT CLAIMS: i. Arrangement for the transmission of messages, at which the traffic either low-frequency in both traffic directions or that of the outgoing traffic of the telephone station and the incoming traffic is carried out at a carrier frequency, characterized in that by the exchange actuated switching means an initial switching of the subscriber station from the first on the second operating mode takes place. 2. Anordnung nach Anspruch i, dadurch gekennzeichnet, daß durch zwei Kontakte eines Relais der das Mikrophon nicht enthaltende Teil der Gabelschaltung geöffnet und zugleich das Telephon an den Hochfrequenzgleichrichterkreis gelegt wird. 2. Arrangement according to claim i, characterized in that that through two contacts of a relay the part of the not containing the microphone Hybrid open and at the same time the telephone to the high-frequency rectifier circuit is placed. 3. Anordnung nach Anspruch i und 2, dadurch gekennzeichnet, daß das Relais durch von der Vermittlungsstelle ausgehenden Gleichstrom erregt wird.3. Arrangement according to claim i and 2, characterized in that the Relay is energized by direct current from the central office.
DEL90279D 1934-03-14 1936-05-01 Arrangement for the transmission of messages Expired DE726045C (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DEL85522D DE708943C (en) 1934-03-14 1934-03-14 Method for the transmission of messages with shifting the speech streams on sections of the transmission line in different frequency ranges
DEL90245D DE726511C (en) 1934-03-14 1936-04-28 Subscriber station
DEL90279D DE726045C (en) 1934-03-14 1936-05-01 Arrangement for the transmission of messages
NL82857A NL50600C (en) 1934-03-14 1937-06-10
FR823122D FR823122A (en) 1934-03-14 1937-06-15 Device for transmitting messages
GB18436/37A GB501915A (en) 1934-03-14 1937-07-02 Telephone exchange systems
US153074A US2184835A (en) 1934-03-14 1937-07-10 System for transmitting communications
DEL99627D DE730055C (en) 1934-03-14 1939-12-09 Remote place switching for optional low-frequency or high-frequency query

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DEL85522D DE708943C (en) 1934-03-14 1934-03-14 Method for the transmission of messages with shifting the speech streams on sections of the transmission line in different frequency ranges
DEL90279D DE726045C (en) 1934-03-14 1936-05-01 Arrangement for the transmission of messages
NL82857A NL50600C (en) 1934-03-14 1937-06-10
FR823122T 1937-06-15
GB18436/37A GB501915A (en) 1934-03-14 1937-07-02 Telephone exchange systems

Publications (1)

Publication Number Publication Date
DE726045C true DE726045C (en) 1942-10-05

Family

ID=7285923

Family Applications (4)

Application Number Title Priority Date Filing Date
DEL85522D Expired DE708943C (en) 1934-03-14 1934-03-14 Method for the transmission of messages with shifting the speech streams on sections of the transmission line in different frequency ranges
DEL90245D Expired DE726511C (en) 1934-03-14 1936-04-28 Subscriber station
DEL90279D Expired DE726045C (en) 1934-03-14 1936-05-01 Arrangement for the transmission of messages
DEL99627D Expired DE730055C (en) 1934-03-14 1939-12-09 Remote place switching for optional low-frequency or high-frequency query

Family Applications Before (2)

Application Number Title Priority Date Filing Date
DEL85522D Expired DE708943C (en) 1934-03-14 1934-03-14 Method for the transmission of messages with shifting the speech streams on sections of the transmission line in different frequency ranges
DEL90245D Expired DE726511C (en) 1934-03-14 1936-04-28 Subscriber station

Family Applications After (1)

Application Number Title Priority Date Filing Date
DEL99627D Expired DE730055C (en) 1934-03-14 1939-12-09 Remote place switching for optional low-frequency or high-frequency query

Country Status (5)

Country Link
US (1) US2184835A (en)
DE (4) DE708943C (en)
FR (1) FR823122A (en)
GB (1) GB501915A (en)
NL (1) NL50600C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1028625B (en) * 1957-03-14 1958-04-24 Telefonbau Circuit arrangement for the use of carrier frequency on subscriber lines in telephone systems with dialer operation
DE1040611B (en) * 1954-09-10 1958-10-09 Western Electric Co Circuit arrangement for multichannel carrier frequency telephony systems for the transmission of call signals from a central office to a number of subscriber stations located along a transmission line
DE1112549B (en) * 1955-12-30 1961-08-10 Gen Electric Co Ltd Telephone subscriber circuit for the parallel connection of two subscribers to a two-wire line
DE1200377B (en) * 1960-07-21 1965-09-09 Western Electric Co Circuit arrangement for establishing a return path in time division multiplex telephone exchanges

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3802088C2 (en) * 1987-01-26 1996-12-12 Dirr Josef Method for coding and decoding information in terminal stations of switching devices and transmission via connection paths / lines to and from the switching devices

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1040611B (en) * 1954-09-10 1958-10-09 Western Electric Co Circuit arrangement for multichannel carrier frequency telephony systems for the transmission of call signals from a central office to a number of subscriber stations located along a transmission line
DE1112549B (en) * 1955-12-30 1961-08-10 Gen Electric Co Ltd Telephone subscriber circuit for the parallel connection of two subscribers to a two-wire line
DE1028625B (en) * 1957-03-14 1958-04-24 Telefonbau Circuit arrangement for the use of carrier frequency on subscriber lines in telephone systems with dialer operation
DE1200377B (en) * 1960-07-21 1965-09-09 Western Electric Co Circuit arrangement for establishing a return path in time division multiplex telephone exchanges

Also Published As

Publication number Publication date
NL50600C (en) 1941-06-17
DE726511C (en) 1942-10-15
DE730055C (en) 1943-01-12
GB501915A (en) 1939-03-02
US2184835A (en) 1939-12-26
FR823122A (en) 1938-01-14
DE708943C (en) 1941-08-01

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