SE177568C1

SE177568C1 -

Info

Publication number: SE177568C1
Authority: SE
Publication date: 1961-01-01

Description

Uppfinnare: YE Sjodin Foreliggande uppfinning hanfor sig till automatiska telefonanlagguingar och narmare bestamt till abonnentvaxlar, chef stelefonanlaggningar och liknande. Inventor: YE Sjodin The present invention relates to automatic telephone systems and more particularly to subscriber exchanges, telephone exchanges and the like.

I abonnentvaxlar foreligger behov av att under pagaende samtal med abonnent tillhorande det offentliga natet kunna utfora forfragning hos annan abonnent ansluten till den egna vaxeln. Vid forfragningen omkopplas vanligen den till samtalsforbindelsen hOrande centralledningen till en sarskild forfragningsledning, medan den frau en lamplig vaxelstation ingaende ledningen fortfarande Miles belagd. Vid hittills kanda anlaggningar har denna omkoppling vanligen skett genom att fran ifragavarande samtalsapparat utsants en speciell signal, t. ex. den kodsignal, som motsyarar siffran nail, vilken i sa fall slagits av abonnenten pa samtalsapparatens fingerskiva, eller genom att samtalstradarna jordfarbundits. I flertradiga system liar ifragavarande signal overforts pa en sarskild tra.d. In subscriber exchanges, there is a need to be able to perform inquiries with another subscriber connected to the own exchange during ongoing conversations with a subscriber belonging to the public network. During interrogation, the central line belonging to the call connection is usually switched to a special interrogation line, while the line from a light switching station to the line is still Miles occupied. In hitherto known systems, this switching has usually taken place by sending a special signal from the conversation device in question, e.g. the code signal which corresponds to the number nail, which in this case has been dialed by the subscriber on the fingerplate of the voice device, or by the earth wires being grounded. In multi-line systems, the signal in question is transmitted on a special tra.d.

Nom snabbtelefonanlaggningar eller s. k. chefstelefonanlaggningar foreligger behov av att pa nnanuell vag kunna astadkomma vax- hugOverforingsriktningen for i samtals- forbindelsen ingaende forstarkare. I hittills kanda anlaggningar har man alltid anvant separata tradar for overforing ay den for sadan omkoppling erforderliga signalen. With intercom systems or so-called headphone systems, there is a need to be able to achieve the wax-hug transmission direction for amplifiers included in the call connection. In hitherto known installations, separate trades have always been used for transmission of the signal required for such switching.

Andamalet med foreliggande uppfinning är att astadkomma en enkel anordning, medelst vilken ovannamnda omkopplingar i abonnentvaxlar eller chef stelefonanlaggningar kunna astadkommas genom overforing av signaler pa abonnenternas taltradar. The object of the present invention is to provide a simple device, by means of which the above-mentioned switches in subscriber exchanges or head telephone systems can be achieved by transmitting signals on the subscribers' voice radars.

Uppfinningen shall i det foljande beskrivas i anslutning till hifogade ritning, som illutrerar uppfinningens tillampning yid en abonnentvaxel. The invention will be described in the following in connection with the accompanying drawing, which illustrates the application of the invention by a subscriber exchange.

Pa ritningens vanstra del visas sehemat for en centralledning for abonnentyaxeln. Den till vaxeln harande valjar- och snorlinjeutrust ningen har pa ritningen markerats med de rued S och LV beteeknade valjarsymbolerna. Till hoger pa ritningen visas sehematiskt en .abonnentapparat med fingerskiva. The left part of the drawing shows the home for a central line for the subscriber shaft. The selector and cord line equipment associated with the gear unit have been marked in the drawing with the selector symbols denoted by red S and LV. To the right of the drawing, a subscriber device with a finger disk is shown seematically.

Abonnentvaxeln forutsattes vara sä utford att vid anrop ay en utgaende centralledning den i vaxeln befintliga snOrlinjen genomkopplas sa att direkt forbindelse erhalles fran ifragavarande samtalsapparat till centralledningen, och samtalsapparaten saledes erhaller strommatning fran centralledningsutrustningen. The subscriber exchange was assumed to be so challenging that when a call was made to an outgoing central line, the cord line present in the exchange was connected so that a direct connection was obtained from the caller in question to the central line, and the caller thus received power supply from the central line equipment.

Om abonnenten under pagaende samtal med en annan abonnent ansluten till annan vaxel onskar Ora fOrfragning hos en abonnent ansluten till den egna vaxeln, paverkar han momentant en i samtalsapparaten befintlig omkopplare F, i fortsattningen benamnd f8rfragningsknapp. Harigenom utsandes en signal till den for forfragning speciella anordningen och abonnenten anslutes till en f8r forfragning avsedd valjarutrustning, varvid samtidigt den Iran den andra vaxelstationen inkommande ledningen omkopplas till en drossel, sa att denna ledning fortfarande Miles belagd. Efter det abonnenten avslutat sitt samtal med den Over forfragningsanordningen atnopade abonnenten, kan han aterga till den pa centralledningen yantande abonnenten genom att anyo momentant paverka forfragningsknappen F. If, during an ongoing call with another subscriber connected to another exchange, the subscriber wishes to interrogate a subscriber connected to his own exchange, he momentarily acts on a switch F present in the call set, hereinafter referred to as the interrogation button. This sends a signal to the device specific to the request and the subscriber is connected to a selection equipment intended for the request, at the same time the line incoming to the second exchange station Iran is switched to a choke, so that this line is still Miles occupied. After the subscriber has ended his call with the subscriber connected to the interrogation device, he can return to the subscriber running on the central line by momentarily acting on the interrogation button F.

Det i det foregaende i stora drag antydda kopplingsforloppet shall nu heskrivas i detalj. The coupling process, which is broadly indicated in the foregoing, will now be described in detail.

Det forntsattes, att abonnenten pa sin fingerskiva slagit den f8r uppsokning ay centralledning erforderliga siffran, och att abonnentvaxeln darvid erhallit forbindelse med en le-dig centralledning. Abonnentvaxeln forutsattes vara sa utford, att nor uppkoppling till centralledning har skett, dess snorlinjeutrustning genomkopplas, sa att ifragavarande samtalsapparat erhaller direkt an.slutning till centralledningens strommatningsutrustning. 2- - Ledig centralledning markeras av att relaet 114 ligger franslaget, varigenom negativ potential utsattes over anslutningsrelaets R1 undre lindning. Dâ centralledningen anropas, tillslas rela R1 over foljande strombana: minus, R4-2, undre lindningen I pa relh RI, RI-3, c-ledaren och Over multipelkontakt i abonnentvaxelns valjarutrustning. Relaets R1 till-slag medfor, att abonnenten anslutes till strommatningsutrustningen i centralledningen Over fOljande strombana: plus, R3-3, lindning II pa relit 112, lindning I pa transformatorn T, R1-1, a-ledaren, genom v5.1jar- och snorlinjeutrustning j abonnentvaxeln, a-ledaren till abonnenten, klykkontakten K, lindning I ph transformatorn P, likriktaren L1, mikrofon M och lindning II ph transformatorn P, abonnentens b-ledare, genom abonnentvaxelns valjar- och snorlinjeutrustning, centralledningens b-ledare, RI-2, lindning II pa transformatorn T, R3-5, lindning I pa rela R2, minus. Reid 112 tillslas, varvid rela. 113 erhailer strom Over kontakt 112-3 genom lindning I och aven tillslas. Relaets 113 tillslag medfor, att pluspotential utsattes Over kontakt 7 pa reld 113 till lindningen pa relit 114, varvid sistnamnda relit tillslas. Reid R2 erhaller fasthallning Over egna kontakter 5 °eh 6 och i Ovrigt Over samma strombana, som tidigare beskrivits. Da rela 112 tillstogs, utsattes pluspotential Over kontakt 7 pa detta rela till lindningen pa rela R5, som darigenom erholl tillslag. Relaets 114 tillslag medfor, att anrop utsattes pa centralledningen genom slingan; centralledningens a-ledare, R6-2, lindning III pa transformatorn T, R4-1, R3-6, lindning IV pa transformatorn T, R6-5, centralledningens b-ledare. El ter det anrop verkstallis, ligga fOljande raider tillslagna i centralledningen: R1, R2, 113, 114 och 115. It was assumed that the subscriber had dialed the number required for searching the central line on his finger disk, and that the subscriber exchange had thereby been connected to a vacant central line. The subscriber exchange was assumed to be so challenging that no connection to the central line has taken place, its cord line equipment is disconnected, so that the telephone in question receives a direct connection to the central line's power supply equipment. 2- - Free central line is marked by the fact that the relay 114 is flush, whereby negative potential is exposed over the lower winding of the connection relay R1. When the central line is called, relay R1 is connected across the following current path: minus, R4-2, the lower winding I on relay RI, RI-3, the c-conductor and Over multiple contact in the subscriber exchange's selector equipment. The switch-on of the relay means that the subscriber is connected to the power supply equipment in the central line. Over the following current path: plus, R3-3, winding II on relit 112, winding I on the transformer T, R1-1, the a-conductor, through v5.1jar- and cord line equipment j the subscriber shaft, the a-conductor to the subscriber, the tap connector K, winding I ph transformer P, the rectifier L1, microphone M and winding II ph transformer P, the subscriber's b-conductor, through the subscriber shaft's selector and cord line equipment, the central line b 'conductor 2, winding II on transformer T, R3-5, winding I on rela R2, minus. Reid 112 is switched on, whereby rela. 113 erhailer strom Over contact 112-3 through winding I and also turn on. The switching on of the relay 113 results in the positive potential being exposed via contact 7 on line 113 to the winding on relit 114, whereby the latter relit is switched on. Reid R2 receives holding Over own contacts 5 ° eh 6 and in Other Over the same current path, as previously described. When relay 112 was added, the positive potential Over contact 7 on this relay was exposed to the winding of relay R5, which thereby obtained a switch-on. The switch-on of the relay 114 causes calls to be delayed on the central line through the loop; central line a-conductor, R6-2, winding III on transformer T, R4-1, R3-6, winding IV on transformer T, R6-5, central line b-conductor. Following the call, the following raids are switched on in the central line: R1, R2, 113, 114 and 115.

Abonnenten kan nu impulsera over centralledningen, varvid impulsmottagning och -utsandning tiligar pa sã satt att relaerna 112 och 113 arbeta i takt med fingerskivans slutning rasp. brytning. Utsandningen av impulserna centralledningen kontrolleras av rela 113. Relaerna 114 och R5 Ore trogverkande vid franslag och ligga till under impulseringen. The subscriber can now impulse over the central line, whereby impulse reception and transmission are arranged in such a way that the relays 112 and 113 operate in step with the closing of the finger disk. accent. The transmission of the pulses to the central line is controlled by relay 113. Relays 114 and R5 are effective at fringe strokes and lie down during the impulse.

Vi antaga nu, att den anropande abonnenten onskar gOra en fOrfragning hos en abonnent mom den egna ahonnentvaxeln. Den anropande abonnenten nedtqcker darvid momentant sin fOrfragningsknapp F pa apparaten. Harvid kommer stromriktningen genom abonnentslingan att vaxla riktning beroende pa att, (la F-knappen intryckes, likriktaren Li bortkopplas, och likriktaren L2 inkopplas. We now assume that the calling subscriber wishes to make a request to a subscriber with his own subscriber exchange. The calling subscriber momentarily presses his interrogation button F on the device. In this case, the current direction through the subscriber loop will change direction depending on whether the (F) button is pressed, the rectifier L1 is switched off, and the rectifier L2 is switched on.

Fasthallningsstrombanan for rela R2 sparras av likriktaren L2, varvid delta rela franslas. Rata R3 daremot erhaller fastkallning Over abonnentslingan genom likriktaren L2 i abonnentapparaten, Over egen kontakt 4, lindning II 113 och kontakt 112-1, plus samt egen kontakt 2, kontakt R2-2, lindning I R3, till mi- nus. Da kontakt R2-7 vid reliefs R2 frail-slag oppnas, upphor strommatningen till rela som faller med en viss franslagsfordrojfling. Slutningen av kontakt R5-2 medfor, att rela R6 far strom Over plus, R4-3, 115-2, 117-3, lindning I 116, till minus. Reid R6 omkopplar vid sitt tillslag centralledningens utgaende tradar a och b Iran anslutningert till den overordnade stationen till en forfragningsutrustning i den egna abonnentvaxeln. Samtidigt inkopplas en drossel Dr Over de utghende ledarna till den overordnade stationen for fasthallning av de uppkopplade organen i denna. The holding current path for relay R2 is sparred by the rectifier L2, whereby the delta relay is fringed. Rata R3, on the other hand, receives a call Over the subscriber loop through the rectifier L2 in the subscriber device, Over own contact 4, winding II 113 and contact 112-1, plus and own contact 2, contact R2-2, winding I R3, to minus. When contact R2-7 is opened at relief frail stroke R2, the current supply to rela ceases which falls with a certain fringe stroke delay. The closure of contact R5-2 means that relay R6 has current Over plus, R4-3, 115-2, 117-3, winding I 116, to minus. At its turn on, Reid R6 switches Iran's outgoing central lines a and b Iran connected to the parent station to a supply equipment in its own subscriber exchange. At the same time, a choke Dr Over connects the outgoing conductors to the parent station for holding the connected members therein.

Niir abonnenten slapper sin F-knapp, kommer likriktaren L2 att urkopplas, och likriktaren Li att Any° inkopplas. Detta medfor, att strommen for fasthallning av rela 113 sparras, varvid delta meld franslas. SO snart relaet franslagits, inkopplas ph nytt den tidigare beskrivna tillslagsstrombanan for rela R2, varvid relaet tillslOs. Harigenom erhaller Oven meta R3 tillslag pa nytt. Rela. R4 Or trogverkande vid franslag, Tad& detta rela inte faller for den korta oppningen av kontakt R3-7. For att forhindra att relitets R3 franslag medfor utsandning av en impuls pa forfragningsutrustningen hallas de utgaende ledarna a och b kortslutna under detta skede av slingan Over kontakterna R6-7 och 117-1. Tillslaget av re18. R2 foranIeder tillslag av rela 115, som vid sitt tillslag bryter tillslagsstrombanan for raid 116. Detta senare rela far emellertid fasthallning Over sin kontakt 116-8, lindning II, R73, lindning I ph 116, minus. Relaet 117, vars lindning II ligger parallellt med lindning II pa rela 116, tillslas samtidigt. Vid detta raids tillslag omkopplas fasthallningsstrombanan for rel8erna 116 och R7 att ga Over kontakt R7 -2 och genom lindning I pa. 117. I detta shade Egger samtliga raider i centralledningsutrustningen tillslagna, och abonnenten kan nu pa tidigare beskrivet satt impulsera Over forfragningsutrustningen. If the subscriber releases his F button, the rectifier L2 will be switched off, and the rectifier Li will be switched on Any °. This means that the current for holding relay 113 is sparred, whereby the delta is canceled. AS soon as the relay has been switched off, the newly activated switch-on current path for relay R2 is switched on again, whereby the relay is switched on. In this way, Oven meta R3 receives a new strike. Rela. R4 Or faithful at fringe stroke, Tad & this rela does not fall for the short opening of contact R3-7. To prevent the release of the relay R3 from emitting an impulse on the interrogation equipment, the outgoing conductors a and b are kept short-circuited during this stage of the loop Over the contacts R6-7 and 117-1. The onset of re18. R2 causes the switching on of relay 115, which at its switch-on breaks the switching current path for raid 116. However, this latter relay is held over its contact 116-8, winding II, R73, winding I ph 116, minus. Relay 117, whose winding II is parallel to winding II on relay 116, is turned on at the same time. At the turn on of this raid, the holding current path for the relays 116 and R7 is switched to give Over contact R7 -2 and by winding I pa. 117. In this shade Egger all raids in the central line equipment are switched on, and the subscriber can now, in the manner previously described, impulse Over the interrogation equipment.

Efter att den anropande abonnenten avslutat sitt samtal med abonnenten p`a. den egna vaxeln, kan han Aterga till samtalet med abonnenten pa den Overordnade stationen genom att pa nytt paverka sin F-knapp. Pa tidigare beskrivet salt kommer darvid vid knappens intryckning rah 112 att frOnslas, och da knappen oppnas, rela 113 att falla, varefter raiderna 112 och 113 anyo tillslas. DO rela R5 vid detta tillfalle franslas kortslutes strommatningen for lindningarna II ph relaerna 116 och 117. Harvid franslas emellertid endast relit eftersom rela R7 far fasth0llningsstr8m Over plus, R4-3, R5-2, R7-2, lindning I, minus. DO abonnenten slapper F-knappen, och rata. R2 saledes thighs och darmed Oxen reld R5, brytes fasthallningsstrombanan f8r rela 117, varigenom Oven detta rela franslas. After the calling subscriber has ended his call with the subscriber p`a. his own switch, he can return to the call with the subscriber at the Parent Station by re-influencing his F button. On the previously described salt, when the button is pressed, row 112 will be released, and when the button is opened, rela 113 will fall, after which the raiders 112 and 113 will be switched on. DO rela R5 in this case is short-circuited the current supply for the windings II ph relas 116 and 117. However, only relit is cut off because rela R7 has a holding current Over plus, R4-3, R5-2, R7-2, winding I, minus. The DO subscriber releases the F button, and dials. R2 thus thighs and thus Taurus reld R5, the holding current path is broken for rela 117, whereby Above this rela is frayed.

Relastallningen i centralledningsutrustningen overensstammer nu med den som fiirefanns — —3 innan forfragningsanropet gjordes, dvs. rela.- erna R1—R5 ligga tillslagna. Nedkoppling av utrustningen sker, d a-abonnenten Jagger pa sin mikrotelefon, varvid klykkontakten K nedtryckes, och abonnentslingan oppnas. Harvid franslas relaerna R2 och R3 och darigenom aven med en viss franslagningsfordrojning relaerna R4 och R5. Relaet R1 franslas under relaets R4 franslagsfordrojningstid. The relay position in the central line equipment now corresponds to that which existed - —3 before the interrogation call was made, ie. relays R1 — R5 are on. Disconnection of the equipment takes place when the subscriber Jagger on his microphone, whereby the clock contact K is pressed, and the subscriber loop is opened. In this case, the relays R2 and R3 are fringed and thereby also with a certain frictional delay the relays R4 and R5. Relay R1 is franked during relay R4 fringe delay time.

Det inses lätt, att den ovan angivna principen for omkoppling fran centralledning till forfragningsledning vid en abonnentvaxel aven kan tillampas for omkoppling av OyerfOringsriktningen for en forstarkare i en ehefstelefonanlaggning. De modifikationer av den pa ritningen visade relautrustningen, vilka erfordras for att densamma skall kunna anyandas for namnda andamal i chefstelefonanlaggningar, torde latt inses av en sakkunnig person och komma darfor joke att har narmare beskrivas. It is easily understood that the above-mentioned principle of switching from central line to interrogation line at a subscriber exchange can also be applied for switching the transmission direction of an amplifier in a telephone system. The modifications of the relay equipment shown in the drawing, which are required in order for the same to be able to be used for the said purposes in head telephone systems, should be readily apparent by an expert and may therefore be described in more detail.

Claims

Patent claim:

An automatic telephone system comprising selection devices and subscriber devices connected to the selection devices by means of the subscriber. means (1.1, L2), which together have a switch (F) connected to the subscriber line on such a salt that the subscriber line loop Or conducts direct current in a first direction, when the switch is in the apayerkat position, and in a second direction, when the switch is in the payer position, and that the second pulse repeater comprises two relays (R2, 113), one of which (112) has a control current circuit including the subscriber line loop and a direct current head having such a polarity that it strives to drive current in said first direction. by subscriber while the second line (R3) has a control circuit including the subscriber line loop and a DC head having such a polarity that it tends to drive current in said second direction through the subscriber line loop, and the second line has a further control circuit, and the relays are not connected to each other. in said control circuits in such a way that breaking of the subscriber line loop results in disconnection of both relays, while a change in the current direction in the subscriber line loop due to the payer of said switch causes disconnection in one part but not of the other relay, and that said relays control a switching device (114, R5, R6, R7), which is so challenged and connected to naranda relays, that it reaches the current direction in the subscriber line loop yid impact and clarpa. the subsequent reset of the switch in the subscriber apparatus is double reversed, every other time a first is switched from a first to a second switching state and every other time from said second to said first switching state.

Plant according to claim 1, characterized in that an end contact of one relay and a break contact on the other relay Oro are connected in parallel with each other and in series with the control circuit for the first-mentioned relay, that at least one break contact on one relay and an end contact on it the second relay is connected in series with each other and with the subscriber line loop in a control circuit for the second line, and that a final contact on one relay is connected in series with the said additional control circuit for the other relay.

Installation according to claim 1 or 2, characterized in that one of the naninda relays Or is provided with a contact for the payer of said switching device, and that the other line Or is provided with an impulse contact connected in series with a line to a yaljar device.

Plant according to claim 3, characterized in that said switching device comprises a relay (R5) with required friction in the actuating circuit of which said contact for influencing the switching device.

5. An arrangement according to claim 3 or 4, characterized in that said switching device Or provided with contacts arranged to keep said pulsing contact short-circuited, when said second relit when resetting said switch in the subscriber device is freely affected to unpayed temporary pulsation, so that an output pulse thereby connected.

Plant according to any one of the preceding patent claims, characterized in that said switching device comprises a shaft relay (R6) arranged to be switched on in said first switching state and the franking in said second switching state.

7. A system according to claim 6 comprising an automatic subscriber shaft with interrogation capability, characterized in that said switching fire Or is arranged to connect in its one state the central line equipment of the subscriber shaft to a line going out to another switch, and in its second state to connect the central line equipment to a request line.

Plant according to patent claim 7, characterized in that the switching gear Or arranged in its second state Oxen to connect an impedance to the line outgoing to another gear to keep the denim covered during interrogation calls.

9. A device according to any one of patent claims 1-6 consisting of a so-called head telephone system Hied amplifier, characterized in that said switching device is arranged to change the transmission direction of an amplifier included in a connected connection when switching from one state to another. Request publications: Patents freuz United Kingdom 557 388; Germany 913 131; USA 2 364 771, 2 377 544. Stockholm 1961. Iiungl. Boktr, P. A. Norstedt & & Men 610089