DE1265225B - Method and circuit arrangement for the simultaneous transmission of control signals via other communication lines - Google Patents
Method and circuit arrangement for the simultaneous transmission of control signals via other communication linesInfo
- Publication number
- DE1265225B DE1265225B DE1965ST024469 DEST024469A DE1265225B DE 1265225 B DE1265225 B DE 1265225B DE 1965ST024469 DE1965ST024469 DE 1965ST024469 DE ST024469 A DEST024469 A DE ST024469A DE 1265225 B DE1265225 B DE 1265225B
- Authority
- DE
- Germany
- Prior art keywords
- signals
- transmission
- signal
- locks
- transmitter
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
- H04Q1/4535—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted with an additional signal transmitted for voice protection
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
BUNDESREPUBLIK DEUTSCHLANDFEDERAL REPUBLIC OF GERMANY
DEUTSCHESGERMAN
PATENTAMTPATENT OFFICE
AUSLEGESCHRIFTEDITORIAL
Int. Cl.:Int. Cl .:
H04mH04m
H04q
Deutsche Kl.: 21 a3 - 49/20H04q
German class: 21 a3 - 49/20
Nummer: 1265 225Number: 1265 225
Aktenzeichen: St 24469 VIII a/21 a3File number: St 24469 VIII a / 21 a3
Anmeldetag: 6. Oktober 1965 Filing date: October 6, 1965
Auslegetag: 4. April 1968Open date: April 4, 1968
Die Erfindung betrifft ein Verfahren und eine Schaltungsanordnung zur simultanen Übertragung von Steuersignalen über anderweitig belegte Fernmeldeleitungen, wobei die Übertragung der Steuersignale gegen Störsignale gesichert wird. Die Übertragung kann erforderlich sein, um Teile von Vermittlungseinrichtungen von einem zentralen Platz aus zu steuern, z. B. unter bestimmten Voraussetzungen umzuschalten.The invention relates to a method and a circuit arrangement for simultaneous transmission of control signals via otherwise occupied communication lines, whereby the transmission of the control signals is secured against interfering signals. The transmission may be required to parts of switching equipment to control from a central place, e.g. B. under certain conditions to switch.
Da diese Voraussetzungen nur selten erwartet werden, ist es unwirtschaftlich, ein eigenes Leitungsnetz zu verlegen, das fast ständig unbenutzt ist.Since these prerequisites are rarely expected, it is uneconomical to have your own pipeline network to relocate, which is almost constantly unused.
Es wäre naheliegend, die Steuersignale über die Übertragungseinrichtungen einer gerade freien Fernmeldeleitung zu schicken. Dieses Verfahren hätte jedoch zwei Nachteile. Erstens wäre die Übertragung nur möglich, wenn noch eine Fernmeldeleitung frei ist, zweitens wäre die Übertragung davon abhängig, daß die Übertragungseinrichtungen am Anfang und am Ende der Fernmeldeleitung ordnungsgemäß arbeiten. Eine der Voraussetzungen zur Übermittlung der Steuersignale kann z. B. der Ausfall oder die Beschädigung von Vermittlungseinrichtungen sein. Gerade unter diesen Bedingungen soll aber eine sofortige und von der ordnungsgemäßen Funktion der Übertragungseinrichtungen unabhängige Möglichkeit zur Signalübertragung geschaffen werden.It would be obvious to transmit the control signals via the transmission facilities of a currently free telecommunication line to send. However, this method would have two disadvantages. First would be the transfer only possible if a telecommunication line is still free, secondly, the transmission would depend on that the transmission facilities at the beginning and at the end of the communication line are working properly. One of the prerequisites for transmitting the control signals can, for. B. failure or damage be of switching equipment. Under these conditions, however, an immediate and possibility independent of the proper functioning of the transmission facilities be created for signal transmission.
Eine bestehende Verbindung soll wegen der Übertragung der Steuersignale nicht ausgelöst werden, da die zu übertragenden Steuersignale so kurz sind, daß sie eine gleichzeitig bestehende Verbindung auf der Fernmeldeleitung kaum stören. Andererseits ist es wichtig, daß die Steuersignale nicht gestört oder fälschlich hervorgerufen werden. Wegen des Umfangs der durch die Steuersignale eingeleiteten Maßnahmen, z. B. Sperrung von Vermittlungseinrichtungen gegen Belegung, ist es notwendig, daß die Steuersignale nicht böswillig über die Fernmeldeleitung gefälscht werden können.An existing connection should not be triggered because of the transmission of the control signals, because the control signals to be transmitted are so short that they can establish a connection on the Hardly disturb the telecommunication line. On the other hand, it is important that the control signals are not disturbed or falsely caused. Due to the scope of the measures initiated by the control signals, z. B. blocking of switching equipment against occupancy, it is necessary that the control signals cannot be maliciously forged over the communication line.
Aus der Deutschen Auslegeschrift 1062 747 ist ein Verfahren zur Verhinderung falscher Signalgabe bei Übertragung von Wechselstromsignalen inner- und außerhalb des Sprachfrequenzbandes bekannt. Nach diesem Verfahren sind nur bestimmte, gleichzeitig oder nacheinander auftretende Frequenzkombinationen zur Erregung der Signalempfänger fähig, wobei mindestens eine Signalfrequenz außerhalb des Sprachfrequenzbandes liegt. Das Verfahren eignet sich zum Sprachschutz, bietet jedoch keinen Schutz gegen eine böswillige Fälschung der Signale, weil auch die Kontrollfrequenzen außerhalb des Sprachfrequenzbandes nachahmbar sind.From the German Auslegeschrift 1062 747 there is a method for preventing false signaling known for the transmission of alternating current signals inside and outside the voice frequency band. According to this procedure, only certain frequency combinations occurring simultaneously or one after the other are possible capable of exciting the signal receiver, with at least one signal frequency outside the Voice frequency band. The procedure is suitable for speech protection, but does not offer any protection against malicious falsification of the signals because the control frequencies are outside the voice frequency band are imitable.
Verfahren und Schaltungsanordnung zur
simultanen Übertragung von Steuersignalen über anderweitig belegte FernmeldeleitungenMethod and circuit arrangement for
simultaneous transmission of control signals via other communication lines
Anmelder:Applicant:
Standard Elektrik Lorenz Aktiengesellschaft,
7000 Stuttgart-Zuffenhausen,
Hellmuth-Hirth-Str. 42Standard Elektrik Lorenz Aktiengesellschaft,
7000 Stuttgart-Zuffenhausen,
Hellmuth-Hirth-Str. 42
Als Erfinder benannt:Named as inventor:
Anton Düpmann, 7254 Mündungen;Anton Düpmann, 7254 mouths;
Lorenz Gasser, 7000 Stuttgart-MöhringenLorenz Gasser, 7000 Stuttgart-Möhringen
Auf dem Gebiet der Tonfrequenzwahl sind viele Verfahren und Schaltungsanordnungen zur Signalübermittlung mit Sprachschutz bekannt. Es ist Aufgabe dieser Schaltungen, eine Nachahmung der tonfrequenten Wählzeichen durch die Sprache zu verhindern. Zu diesem Zweck werden bestimmte Bedingungen für die Dauer, die Amplitude und/oder die Kombination der Signalfrequenzen überprüft, bevor ein Wählzeichen ausgewertet wird. Die verschiedenen bekannten Verfahren und Schaltungsanordnungen zur Signalübermittlung mit Sprachschutz erfüllen ihre Aufgabe mehr oder weniger gut, aber keine der bekannten Lösungen bietet einen Schutz gegen eine böswillige Nachahmung der tonfrequenten Signale.There are many methods and circuit arrangements for signal transmission in the field of audio frequency selection known with speech protection. It is the task of these circuits to imitate the audio frequencies Prevent dialing characters through voice. To this end, certain conditions are set Checked for the duration, the amplitude and / or the combination of the signal frequencies before a dialing character is evaluated. The various known methods and circuit arrangements for signal transmission with speech protection do their job more or less well, but none of the known ones Solutions offers protection against malicious imitation of audio-frequency signals.
Aufgabe der Erfindung ist ein Verfahren zur simultanen Übertragung von Steuersignalen über anderweitig belegte Fernmeldeleitungen, das eine zufällige Störspannungsbeeinflussung oder böswillige Nachahmung der Steuersignale, also jede Beeinflussung durch Störsignale, ausschließt.The object of the invention is a method for simultaneous Transmission of control signals via otherwise occupied communication lines, the one at random Interference voltage influence or malicious imitation of control signals, i.e. any influence by interfering signals.
Das Verfahren nach der Erfindung löst diese Aufgabe dadurch, daß die Steuersignale aus einem Vorsignal und mit diesem Vorsignal gleichartigen Hauptsignalen bestehen, daß das Vorsignal oder ein gleichartiges Störsignal das Einschalten von an den beiden Enden der Fernmeldeleitung angeordneten Sperren bewirkt, und daß diese Sperren die Übertragung von Störsignalen, die den Hauptsignalen entsprechen, verhindern. The method according to the invention solves this problem in that the control signals from a distant signal and with this distant signal there are similar main signals that the distant signal or a similar one Interference signal the activation of barriers arranged at both ends of the communication line causes and that these barriers prevent the transmission of interfering signals corresponding to the main signals.
Es ist wesentlich, daß das Vorsignal und die Hauptsignale gleichartig sind. Hierdurch wird erreicht, daß nur ein die Hauptsignale nachahmender Störsender die Sperren betätigt, wodurch eine unnötige Behinderung der bestehenden Verbindung auf der Fern-It is essential that the distant and main signals are similar. This achieves that only a jammer mimicking the main signals operates the locks, creating unnecessary obstruction the existing connection on the remote
809 537/94809 537/94
Claims (1)
Sprechzeit betätigt. 55nen influence on the security of the signal transmission, the description was always based on a unilateral because the receiver on the receiving side only through directed signal transmission. A symmetrical expansion of the transmit and receive signals is enabled by a sufficiently long distant signal for evaluation 50. Another feature of the circuit arrangement is that the same method and a similar one of the transmitter-side switching means for blocking the circuit arrangement can also be used for a bilateral communication line against interference signals without signal transmission.
Talk time actuated. 55
Zeichnungen erläutert werden:In the following, the invention is to be based on the claims:
Drawings are explained:
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1965ST024469 DE1265225B (en) | 1965-10-06 | 1965-10-06 | Method and circuit arrangement for the simultaneous transmission of control signals via other communication lines |
GB4382366A GB1153455A (en) | 1965-10-06 | 1966-09-30 | Telecommunication Channel Control Arrangement |
NL6613954A NL6613954A (en) | 1965-10-06 | 1966-10-04 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1965ST024469 DE1265225B (en) | 1965-10-06 | 1965-10-06 | Method and circuit arrangement for the simultaneous transmission of control signals via other communication lines |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1265225B true DE1265225B (en) | 1968-04-04 |
Family
ID=7460138
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1965ST024469 Withdrawn DE1265225B (en) | 1965-10-06 | 1965-10-06 | Method and circuit arrangement for the simultaneous transmission of control signals via other communication lines |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1265225B (en) |
GB (1) | GB1153455A (en) |
NL (1) | NL6613954A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3405013A1 (en) * | 1984-02-13 | 1985-09-12 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Circuit arrangement for exchange of signalling between telephone switching systems interconnected as primary and secondary systems |
DE3411205A1 (en) * | 1984-03-27 | 1985-10-03 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Method for exchanging signals between telephone switching systems interconnected as primary and secondary systems |
DE3418458A1 (en) * | 1984-02-13 | 1985-11-21 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Circuit arrangement for exchanging switching signals between telephone switching systems interconnected as primary and secondary systems |
-
1965
- 1965-10-06 DE DE1965ST024469 patent/DE1265225B/en not_active Withdrawn
-
1966
- 1966-09-30 GB GB4382366A patent/GB1153455A/en not_active Expired
- 1966-10-04 NL NL6613954A patent/NL6613954A/xx unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3405013A1 (en) * | 1984-02-13 | 1985-09-12 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Circuit arrangement for exchange of signalling between telephone switching systems interconnected as primary and secondary systems |
DE3418458A1 (en) * | 1984-02-13 | 1985-11-21 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Circuit arrangement for exchanging switching signals between telephone switching systems interconnected as primary and secondary systems |
DE3411205A1 (en) * | 1984-03-27 | 1985-10-03 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Method for exchanging signals between telephone switching systems interconnected as primary and secondary systems |
Also Published As
Publication number | Publication date |
---|---|
NL6613954A (en) | 1967-04-07 |
GB1153455A (en) | 1969-05-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
E77 | Valid patent as to the heymanns-index 1977 | ||
EHJ | Ceased/non-payment of the annual fee |