AT71464B - Circuit arrangement for telephone systems in which several subscriber stations can be connected directly to one and the same exchange line by moving a switch. - Google Patents
Circuit arrangement for telephone systems in which several subscriber stations can be connected directly to one and the same exchange line by moving a switch.Info
- Publication number
- AT71464B AT71464B AT71464DA AT71464B AT 71464 B AT71464 B AT 71464B AT 71464D A AT71464D A AT 71464DA AT 71464 B AT71464 B AT 71464B
- Authority
- AT
- Austria
- Prior art keywords
- switch
- exchange line
- moving
- connected directly
- circuit arrangement
- Prior art date
Links
- 230000000903 blocking effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Description
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Schaltungsanordnung für Fernsprechanlagen, bei denen sich mehrere Teilnehmerstellen durch Bewegen eines Schalters unmittelbar an eine und dieselbe Amtsleitung anschalten
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stellen, ist Vorsorge zu treffen, dass bei Belegung der Amtsleitung durch eine Nebenstelle der Anschluss einer zweiten Nebenstelle an die Amtsleitung verhindert wird. Dies geschieht beispielsweise durch Sperrelais, die zur Wirkung kommen, wenn eine zweite Nebenstelle sich auf eine bereits belegte Amtsleitung einzustellen versucht, obwohl durch Signale angegeben ist. dass die Amtsleitung belegt ist. Die Erfindung betrifft nun eine besondere Schaltung für das Sperrelais der Hauptstelle. welche zur Aufnahme der vom Amte kommenden Anrufe bestimmt ist.
Dieses Sperrelais ist in den Stromkreis der Besetztzeichen der Sprechstellen eingeschätzt und wird beim Belegen der Amtsleitung von seiten einer gewünschten Nebenstelle erregt. wobei es einerseits die Verbindung der Hauptstelle mit der Sprechleitung aufhebt und andererseits den Stromkreis für die Sperrelais der anderenNebenstellenvorbereitet.
Auf der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt für eine
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schliesslich Kontakt 12 geschlossen wird. Durch den letztgenannten Kontakt wird Erde an den oben genannten Stromkreis des Relais 7t* gelegt, so dass dieses erregt wird und bei 21 die Sprechschleife der Hal1ptst811e II unterbricht, während bei 16 der Stromkreis für die Sperrelais r'... der anderen Nebenstellen N2 ... vorbereitet wird.
Wenn die Nebenstello N4 ohne Rücksicht auf das Signal S3 durch Umlegen des
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unterbrochen und der Kontakt 19'geschlossen. Hiedurch ist der Sprechapparat Sp'der Nebenstelle N2 kurzgeschlossen und von der Leitung 2, 6'abgeschaltet, so dass sich die Nebenstelle N2 weder an die Amtsleitung 1, 2 anschliessen, noch das von der Nebenstelle NI geführte Gespräch mithören kann.
Wenn eine Nebenstelle NI selbst eine Verbindung mit der Amtsleitung herstellen will, so treten im wesentlichen die obenbeschriebenen Schaltvorgänge ein. Ein Unterschied
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der Hauptteile an die Nehenstelle der Schalter T der Hauptstelle wieder in die Ruhelage zurückgebracht wird.
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Circuit arrangement for telephone systems in which several subscriber stations can be switched on directly to one and the same exchange line by moving a switch
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care must be taken to prevent a second extension from being connected to the exchange line if the exchange line is occupied by an extension. This is done, for example, by blocking relays, which come into effect when a second extension tries to adjust to an outside line that is already in use, although signals are indicated. that the trunk is busy. The invention now relates to a special circuit for the locking relay of the main unit. which is intended to record incoming calls from the office.
This blocking relay is included in the circuit of the busy signal of the intercom and is energized when the trunk line is seized by a desired extension. on the one hand it cancels the connection of the main unit with the speech line and on the other hand it prepares the circuit for the blocking relays of the other extensions.
In the drawing, an embodiment of the invention is shown for a
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Finally contact 12 is closed. The last-mentioned contact applies ground to the above-mentioned circuit of the relay 7t *, so that it is excited and at 21 the speech loop of the Hal1ptst811e II is interrupted, while at 16 the circuit for the blocking relays r '... of the other extensions N2. .. is being prepared.
If the extension N4 regardless of the signal S3 by switching the
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interrupted and the contact 19 'closed. As a result, the speech set Sp 'of the extension N2 is short-circuited and disconnected from the line 2, 6', so that the extension N2 can neither connect to the exchange line 1, 2 nor overhear the conversation conducted by the extension NI.
If an extension NI wants to establish a connection with the exchange line itself, the switching processes described above essentially occur. A difference
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the main parts at the next station the switch T of the main station is brought back into the rest position.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE71464X | 1913-11-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT71464B true AT71464B (en) | 1916-04-10 |
Family
ID=5635803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT71464D AT71464B (en) | 1913-11-12 | 1914-11-07 | Circuit arrangement for telephone systems in which several subscriber stations can be connected directly to one and the same exchange line by moving a switch. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT71464B (en) |
-
1914
- 1914-11-07 AT AT71464D patent/AT71464B/en active
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