DEP0034545DA - Circuit arrangement for telephone systems, in particular private branch exchanges. - Google Patents

Description

(Replaces paragraphs 1-4 of the description of 02/10/49),

£ ΐη Telephone systems with an automatic call, it is sometimes necessary to cancel a call state caused by the periodic call if the connection cannot be completed for any reason, e.g. due to the called subscriber's report. Such a task occurs, for example, in private branch exchanges in which the ringing stream sent by the exchange causes a call state in the sub-exchange that must be canceled again if the ts connection in the sub-exchange is not queried within a certain period of time and the Public authority has then hung up his receiver again.

In a known arrangement, this object is achieved in that a time switching device consisting of thermal relays is switched on by the periodic call and comes into effect when no more ringing current arrives for a long time. The arrangement is so% e4 * a ££ © Ä that the so-called timing device, which was left on during a short ringer pause but has not become effective, is initially brought back to rest under the influence of the following ringer surge before it is restarted during the subsequent ringer pause is put into action.

The invention solves the present problem with simple means in that a relay, which is switched on by the periodic call and characterizing a call state, is held in the call interval via a charged capacitor and the capacitor is kept current impulses for each subsequent call recharged Jird _i The advantage of the invention occurs

Act. Ζ. P 34 545 (Reg. 824).

This is particularly evident in systems in which a capacitor suitable for this purpose is already available ο This is the case, for example, in line-fed ancillary component systems, in which sieve throttle and sieve capacitors are present to smooth the flow taken from the network and directed by means of balancing devices _e According to) ' According to the invention, in this case the filter capacitor is also used to maintain the call status during the periodic call./ 

lie invention is based on

M ^ SiTfeitmg »^^ - im

this sweck and uses ae ^ instead of the ssen. for her 'Iebiiag das ^ leIciycrichteten change st r ^ iaii ^ o i _j <f £ iaeueo itondensators «She achieves this dad ^ ifeh, da; - © in Eelaie via dejor ^ ufge1adens through the periodic call, which characterizes the exchange of calls η fciebkondeasisfoa? in. the Bufintervall ^ eii ^ th and the Siebkonden sö t or dareh each _i the naohfoj ^ mä periodic Baf et rom stoße et.a ut

How the invention is explained on the basis of the example shown in the drawing, which shows an arrangement for a small extension system with a main and an extension, which in practice is referred to as an intermediate station , Bie power is supplied through Ketaspeisang "the operation of the system is as follows:

a) Internal connection «^

Bairn remained the listener on the main spot lim speaks authentic i se st rotskrei s "üs Helsis & 1 while the Jiffersnarelaisll lying in the same i, trooiii · ^ io is not excitement," By responding ¥ β "Itelais £ 1 Helais Y1 the circuit

*, b 11, ¥ 1 (5,6), m _f -

© Ingeschaltot. To call the Meheastelle hgt, the subscriber at the main office wears his external dial on arm Iiiiifc diu se sibliiaf en. Is therefore the relay t'l impuls ^ ee switched off and sing again »At the first AuescheXtua ^ Kelais SI speaks in the circuit

+, viii, V2 (4,2), b 11, SlII _i s2I, ν · 4, the Kelais V2 «i; which, like aas lelmis VI, lasts for the entire duration of the hairpin * Beia /.n-* the Eelaie V2 is talking about

T _{ v2IXX, SlIil _f 11 (5,4), RH _s «2, dee Eolsis ΐΛ switched on, which in the fctro & circle +, ¥ 2111, r1VI, m (1,2), pw, ull, W2, -

the SolV'Oehalorrolais PW in Selb stunt erb r-e rather circuit oiüso contains. Buroh v / eitere iioatakte of the relay B1 becomes

following circuit aar intercom M ^ t closed; C-), PW (5 _# 4), ttV, rl IV _t 12 (5.6), ZVI ₁ MJI,

'ü) Qilnshiiier place, BUll _s r1V, 12 (-1,2 ;, +.

Meseffii fcfcroiakreie is superimposed on an alternating current, the eaf inductive 'way, on which "Vioklung 3,4 des Polweohslerrel & si @ .VW is transmitted * Her alarm clock of the extension sjlfc responds, the extension announces itself by lifting the listener _f then speaks aas Feed relay 82 of this call station at Belais I ^p S causes relay V2 to be externally connected via contacts s2I, sill, s1I, so that it drops out and switches off the relay and the circuit for relay R1. Both bpreohstellen are connected via part of the AmtBleituog and can talk to each other. During the conversation, the Telsis £ 1, S2 and V1 are excited. D1 & the connection is released by hanging the handset on both SpreohSitellen _s, which means that the feeder relays ssuia waste koaaaen. and also 'the Selais V1 looks back in its Hoheleye *

Jb j,. Outgoing office ^^ rbj.ndun ^^

When an outgoing official connection is set up, for example from the main station, the earthing button T is briefly actuated at this after Aciiebea des risrers, woo-uroh, as is well known, the Mfferensrelais X1 in the feed sti-oiakr ice of this communication station to respond to co ^ iat " Jnfo lg ed * ssen Kprecttea in the Otroaakr-ice

U xUn-, xll, S1 (4.2V, ul, c (l, 2), the relays B1 and C en.

£ i © oh the Loslessen raced • falls of!. © IAIE £ 1 off müvas nuiiiaehr until then Shorted Kelais U in. The circuit

+ »VtlI _i v2.il, Ü (4,2), Tilll _s Kl (1,2), Ul _j 0 (1,2), -

to respond Komrat · The relay C and B1 be held. Baroh contact c1 but the endarwioklunge η of the transformer Ue is made a loop kum aort, whereby

the connection devices of this Arate are occupied, if it is assumed that it is a ViIUaleruat, then the main office establishes the Veroindaiig through a number of the desired Itoraaer The impulses are transmitted by the Üontaki sill lying in the a-wire of the trunk line ./during a pulse series speaks for the Bauer dia8er pulse series des Belais Td en, which creates a short circuit of the secondary windings of the over-exciter via the contacts v2I and UlV in order to avoid impulses won in the known way. Maoh. Establishing the required intercom connection, the Melais ti, VI, C s »1, ö in the private branch exchange are activated,

; 3s it is angeuoitmea that the main station wants to hold a Bückfra ^ e with the lift station. As a result, the relay El koKrat through Karasohlu; ^; A um Ab .Call, "sewing the relays U and C in the ätrookreie

+, Ul _i U (3.4), 0 (1.2), -

keep going. JK After releasing the button, Lelais Ki drops out, so that icelais U is now also de-energized, jPas relay C, on the other hand, is kept in the circuit

■ t, VlII _s eil, 0 (5.4), ~
further. The extension of the extension takes place as with the internal connection described above , soclüse the beidoa connected via ice en i'eil eggs Amtsleitang 5.:preohstellen can run the EiIckfrs ^ egespräch, se without u & the xat steilnehaier this Ge-spoke listen Icsaa _e

If the liaapistelle closes back to -das- üiat again, it again temporarily activates the airdungstest T _3, which auüaclist HelsIs Kt and after letting go of the faute also Eelais U sum Aneprecheo korarat. 2> The MauytsLeils is in turn connected to the official participant.

GoXI Cia _i · e ^ en diss ArabsijeQpriiah from the in Sliokf v & z® «nge-Iiifeiiea IveueiieielXe UhornoOii _i ©» , so bet ^ tijt IatErfeex ¹ B νor then iure ^ rdun _i5 St aste, soda ^ eord that you «uelais A2 sam response koiwat una Helais H2 switches on. ".! Oci 'i döii Loslassea aer i'sste and garbage relay X2 kosmit Kelaia U sum response" M © Stroiakreise for these switching operations correspond analogously to, prepare hosehr ieoer .en ..

How the ami connection is triggered by SitiMkn ^ ea of the intercom connected with the ABtslei tang, "Ue come AiBQheiuander dia IlBlaie ϊΛ" üztu & 2 and V1 , sovae nach abfall * © l Kelais Vl die Aelais Kf (i! 2), sum waste »

SLL Arriving d e Aiat sy e rb indane , «ί

In the case of an Aiat ssnrui ', through the periodieciie ^ ilittf etrom ■ dss in the bridge to the fcsprechödern arranged call relays / "K to speak _s that with his contact ar III the following atreme" - closes:

v _t V22I2, srlil, Z (l, 2), s2111, S2lg _f 4), ** Μ2

■ Äo, r1YI, _}

In this fctrocakreis the Belais ' ά and IUi _s soAie address the oliveohsler relay r \ v ", As a result, the Aetitaate r2XV and r2II of the I ο Iwe oh sie r " raeugte oeohaelstiom sum Epreohap? "Erat Uer HanptBtelle the A & fstroei- »push over the trunk line only Aai ¹ Siieitig is given *, Ifelaie AR 'falls again Bh _s soda se also cor circuit for the Isle 8, K2, soMe for the folwoalielo? Väeder is interrupted * XolaiB Z keeps the charged slect rolling capacitor oil each for the Iiieauog of the rectified '• AOchselst? ame provided Is _i in deci UzTm & ~ Areie

+, S (5.6) ₅ al, oil, +

for the isaue * a ^ Kuf ^ te »r & 3JUfe» 'Irifft der uAchate Iiuf * - Litroaato !? vo &'^ i a, then the ä Iekt ro I ^ yt capacitor 01 is in an over the. AontHkt type running Istromkreis again aafije: ioden, so ate see the AeXais 2 after the end of the

Keeping the current surge Jcaim _e «Every incoming current surge thus causes on the one hand the Asraf of the main body and on the other hand the Auf lacluag of the /« Sföktrolytkoadenaators, & QÜ & B the laleis 2 for the ilaaer of the periodic Muios QE remains sucked. Baim ^ aspr © ehea des KolaiB Z ward © ia dem

W4, b 2 I, all, MZll _i hX ₉ 'Sh _s +

dee Siissnäö-Ilelaia Th switched on, which is initially without effect β

Jiölöet to Giuad de © call the Haapt st ^ He Hst la the Eufpatise, dßan speaks the dining relay Foei this btolle © n _e is consequently übbt the JCoatakt © 11 because © relay vi eioge "SClialtet _i da © ia the Iitrorakrede

* _s viii, alV, 11 (1 * 2), ul, C (d, 2), the Halai © 11 uad O sum Aaspreohsn ο wrestles i-iach garbage ves Belaie. & is in the Sitroariireis

+, viii, v211, 0 (1,2) _s Γ111Ι, Κ1 (Ί, 2), ul, Q ( ^j X _t Z) _t - lt © lais U excited. Through the Aaspreohoa of the Helais El _s 0, U , the main office is connected to the Astsleituag without the need to operate the Urduw _t H ₁ Styate en der Eauptstelle © Iaedaii _e jjl © Punktion d © e Belais & 1 _t da © with outgoing Official traffic is activated by the grounding test © and the connection of the ^ preohetelle to the © Aaifcsltung is effected, © eplf in © la incoming traffic from the Kelsls Z Uberaomraen _e

v -öldet © I dia Hau _i Ztstell © but not after a certain Koit, then _ addresses the Theriao-Kelais -I'h , which by means of © a Hontaktcs th the Eelais H © Iasohalte _e ., uroh 'itede © arrives A current impulse therefore becomes, in addition to the Kelai © Z _t E2, i -w, the element E1 in the circuit

*, v2III, arlll, aV, hll, s1Ill, B1 (3 # 4), all, fl2, -elnge retained ι so that both telephones are called. With® Isolden one of the Spreohstellen speak, as described above, the Ilelöle B1 © sw. Eg _i O and U , which connects the lifting öprechst © 11 © to the Aiat © 1 © Itung *

lie are Eiooh following © i cases au. consider:

ISs was angerioiaffiöß that oils aebeastelle MM aweeks Heretellang a connection abniratnt the handset au one Zeitpanat ₉ in vvelcliea the Haiiptetelle iact by the Office of is called, is energized in in .this Faase the Kelais Z, is the Iq ^ aschlußleitung the Uebe assteil © the country Widere ft 6 which beeie so s Feien 1st deC the bpeiserelais Ö2 not is in compliance canoe "the IIex position a connection from the quake site au a is ί DA - * it ve rh inde rt ·

Srf4) Igt a Amtsaaruf ordered in a time in which a connection between the main and extension, a response ve "Eelsis 2 is clocked by the folded Kon s2iil prevented. j) 'The Kufrelais _r - as well as the Folweoasler- "relay can not respond either" Me in a conversation nehiaen the ankooitaeadsa / • Jits aniuf true because "by ^ every Kufstromimpuls by means of the contact art over iloatakt si 'feil der üiebai-üi?,: -. el IM course is closed, whereby a no longer completely filtered feed stream is applied to the connection lines of the two Spreohstellea. Ü receive Bie Appeal Tellen & PD a Bruiroton in iavthmus of periodischenüufβe.

.over in the AaeehluSloitua ^ ea the bpreehsteilen © Ingeschleift® switch kü is intended for real traffic, on the side of the switch an incoming call comes directly to aar extension ii ^ t «

Ώ & β Keleis III is used to control the water flow, as long as the current is present, it is constantly excited. If the Letaspeianung fails, so the Felais a about apostasy and © ohalt't the MitXeitaag directly with the AaschluSleitung the Höupts el Xe üttsö £ 0 £ asn, so that axoh calls arriving at Ustseasfall can be avoided.

Claims (6)

New claims ^ 1) Circuit arrangement for telephone systems with automatic calling, especially for private branch exchanges, ₄ j. characterized in that a relay (Z) which is switched by the periodislsKSi? * ruffle and characterizes a call state is held via a charged capacitor (C t ** & * A ^ in deC Ru : » and the capacitor dwrok * ^ ff * ^ each) ? the subsequent periodic call surges is recharged, 2) Circuit arrangement according to claim 1, for mains-powered private branch exchanges, in which to smooth the dem AC current removed from the mains and rectified by means of a rectifier, filter chokes and filter capacitors are provided, characterized in that the Siäakondensat or (electrolytic capacitor C1) is used, 3) Circuit arrangement according to claim 1-2, characterized in that the relay (Z) characterizing the call status only responds to a Mtsanruf with Frei.ein the speech stations and in the occupied case._die Jirkung of the filter throttle (DR) for example by 4 ^ 4 * ^ e * ® «^ short term of a contact (zl) of the then not responding relay /" ^) ^{1 is} canceled, so that the subscribers in an internal connection receive a humming tone in the rhythm of the periodic ringing current, 4) Circuit arrangement according to claim 3, characterized in that a changeover contact (zl) of the relay (Z) in its rest position prepares the short circuit of a part of the filter throttle (DR) and in its working position an Iialtestromlcreis running over the filter capacitor (C1) for the relay (Z) closes. 5) Circuit arrangement according to claim 1-2, characterized in that the relay (Z) when reporting the call station (Hst or Igt) affects the connection to the exchange line using the same switching elements (R1 or R2, C, U), for outgoing exchange for connection of the intercom via the one in the supply circuit, Differential relays (X1, X2) excited by pressing the earth button come into effect, 6) Circuit arrangement according to claims 1-2, characterized in that the relay (Z) when responding, the ohmic resistance of the connecting line of the only second line to be considered for receiving an office call (RufweiterIeitung ^/; zur ^ l | ^ fi) so increased that the feed relay (S2) this - ^ issfe-itrfN. cannot speak when picking up the handset.