TELEPHONE NETWORK WITH SWITCHING PLANTS, WHICH ARE OVER FEEDER LINES WITH ONE ANOTHER GROUP, IN PARTICULAR BRANCH NET WITH A MAIN PLANT, WHICH IS OVER NEBENANSCHLUSSLEITUNGEN WITH WAEHLUNTERANLAGEN GROUP

The invention refers to a telephone network with switching plants, which are connected by feeder lines, in particular a branch net with a main plant, which eranlagen over Nebenauschlußleitungen with Wählun are connected and at that amtsberechtiEte and direct-access Sprcehstellen are not attached, whereby the signal system of the telephone network does not contain absolutely necessary by alternating current characteristics, in particular 50-Hertz-Wechselstromkennzeicben, formed main identifiers and additional, for the connection establishment and clearing for the connection establishment and the clearing necessarily necessary Nebenkennzeiehen formed by audio frequency characters, whereby a Nebenkennzeichen is sent always immediately after a main identifier, whereby the respective Nebenkennzeichen directly preceding the main identifier is intended also for the control of for sending, admission and evaluation of the Nebenkennzeichens serving Sendeund receipt mechanisms, whereby following a complete Wahlinfomation a Wahlendekenuzeichen and whereby in the way busy condition a lane busy signal one transfers. The use of doubly arranged feeder lines in connecting traffic, in particular in telephone networks, is well-known. If it concerns thereby connecting traffic between Fernsprechnebenstellenanlageu and if the PABX are equivalent, then generally of cross connection traffic one speaks. If it acts against it around the telephone transmission between a head nl ge and a so-called selecting under plant, by which from connections to the public office only over the main plant can be manufactured, then generally of Nebenanschlußleitungen selecting under plant traffic is spoken, spoken with each traffic between telephone systems and in particular between Hanpt ul ge and selecting under plant, from which from connections to office only over the head nl ge publish be manufactured can, then generally of Nebenanschlußleitungen and selecting under plant traffic. With each traffic between telephone systems and in particular between main plant and selecting under plants of an extension net, characteristics 2S between the two plants are exchanged. These indications can be sent e.g. as direct current characteristic, inductive character, as alternating current characteristic, audio frequency characteristic and also as Mehrfrequenztonwah] indication. Which classification of signals is used, is not only from the respective telephone system of the telephone system and the mode of operation of the used line transmission, but also dependent on the number of characteristics which can be transmitted. With the transmission method for the characteristics over the feeder lines, which can be transmitted, it is generally insignificant, which choice procedure is used in each case in the plant existing at an end of the feeder line. It is generally insignificant whether at a feeder line end impulse choice or push button selection or both kinds of choice are intended. The respective choice procedure can be gewäblt freely. The respective transmission method for those W-hLkennzeichen over the feeder line can likewise freely be selected. From there both impulse choice characteristics and Mehrfrequenztonw be hlkennzeichen and also different indications can be transferred. With impulse choice it is usual to pass these on in the character font of the used transmission method of the feeder line simply. With the available telephone network additionally alternating current characteristics and audio frequency characteristics which can be transmitted are intended to the choice characteristics, whereby the audio frequency characteristics can be also multi-frequency characters. The alternating current characteristics called main identifiers and the Tonfrequenzkennzeiehen are as multi-frequency characters as Nebenkennzeichen. This use from main characteristics and Nebenkennzeichen to transferring characteristics over blocked feeder lines is already well-known from the DE-OS 2233764, whereby one can also assume that it admits is to assign to the main identifiers depending upon transmission direction different lengths in order reached through a Übcrtragungsrichtung to secure. With from the aforementioned DE-OS 2233764 well-known procedures for transferring characteristics over between Fernsprechhauptund of a telephone under plant running blocked feeder lines are not e.g. exchanged for the Aufund dismantling of a connection necessary characteristics, as as for example allocation characteristics, choice impulses, free characteristics and release characteristics as 50-Hertz-Wechselstromkennzeichen of different length and all for the actual connection establishment necessarily necessary characteristics, as authorization flag, lane occupation characteristic u.dgl, as audio frequency characteristics of different frequency between the two plants. With this procedure aßch multi-frequency clay/tone choice characteristics can be used. A Tonfrequenzkennzeichcn directly preceding the Wechseistromkennzeichcn serve also for it, one free for the admission to turn evaluation and/or sending on of audio frequency characteristics s necessary audio frequency receipt mechanisms and/or transmission mechanisms to the Verbindungsleimng. With that procedures managing specified it is not evaluable related to the release of a connection in the anwählcnden, calling plant whether the release took place due to Bcsetztkennzeichnung, selecting an unauthorized participant, its or end of conversation. From there also no appropriate information of the selecting Teilnehmerste] le can come and/or it can also no automatic Zuschaltung of an operator's position in or other trap take place. The task of the invention is to consist now of providing a telephone network with it in the calling plant (main mountains ha) possible is to be recognized whether it acts during the release taken place ts the connection around a release due to a Anwählers of a nichtamtsbereehtigten substation of the rain plant (WUA) by the selecting participant of the main plant. This is reached by that into the Gegenanlage (WUA) and in the activated condition the release character appropriate indication selective on selecting a not direct-access substation at the latest before transferring the Meldckennzeichens (m) to the plant (ha), calling in each case, sending mechanism is present, and which is present in the plant (ha), calling in each case, with the receipt the Auslösezeiehen corresponding of the indication responding arrangement, by which both the release in the connection of the mechanisms taken part and the release of the feeder line are controllable and in as calling plant the valid plant a marking of selecting an not entitled substation. 2s Hiedurch is possible it in simple way that in the calling plant it is recognized that it see during the release of the connection around a release due to selecting an unauthorized substation in the Gegenanlage acted and for example appropriate information can reach to the selecting substation in the calling plant (main plant). A further favourable execution of the invention consists of that with recognizing a Gassenbesetzt-Zustandes with the connection establishment into the Gegenanlage indication appropriate before transferring the end of selection characteristic the release characteristic to the calling plant transferably and thus there the Gassenbesetzt-Zustand is characteristicable likewise. From it the advantage results that in the calling plant without use of an additional characteristic on the feeder line it can be recognized that it concerns with the release procedure a clearing because of lane occupation its. A further favourable execution of the invention consists of it that by releasing before the end of selection characteristic and/or before the Sprechste] le-free-characteristics and/or before the Sprechste] life setting characteristic a connection to a Vcrmittlungsplatz is controllable. From this the advantage results that with recognizing releasing due to selecting an unauthorized substation of the Gegenanlage in special cases the operator's position the structure of the desired connection can übernelunen. A further favourable execution of the invention consists of that with “lane-occupied” and repetitive unsuccessful Wegesuche and/or with effected Sondcrsignalisierung a connection is to an operator's position controllable. 4s from it results the advantage that an operator's position can be helpful in the connection. On the basis the Fig. 1 to 7 a remark example of the invention and the details standing thereby in Zusùmmenhang are beschriehen. Fig. 1 shows from the main plant --Ha-- outgoing main identifiers HK1 to HK4 and Nebenkennzeichen NK1 to NKI'", which are sent in connection with the occupying in such a way of the feeder line and the following first choice pulse series with for example 3 impulses with the connection establishment over the feeder line. The Nebenkennzeichen NKI' to NKI'" 'represents, as is still described, in each case the repetition of the Nebenkennzeichens NK1, Fig.2 shows by the selecting under plant --AUA-- outgoing main identifiers and Nebenkennzeichen with the VerbinNr.350636 structure of dung to a Hauptan] age --Ha-- whereby Fig.2a points to occupying necessary main identifiers HK5, Fig.2b for occupying necessary main identifiers HK5 and a directly following, e.g. a code choice indicating Nebenkennzeiehen NK2 points, of different lengths a consisting Fig.2e to the main identifier HK5 of two audio frequency characters, e.g. an office without Selbstwäh] serves indicating goods characteristic NK3 shows and whereby Fig.2d to the Hauptkennzeiehen HK5 from three audio frequency characters an existing, an office with Selbstwäh] indicating Nebenkennzeichen NK4 serves shows, Fig.3 shows the main identifiers HK7 to HK10 of a first W h inclusively] tmpu] sserle the allocation characteristic HK6 for the connection establishment of the selecting under plant --WUA-- to the main plant --Ha-- without use of Nebenkennzeichen, Fig.4 shows both from the main plant --Ha-- and the Wählunteran] age called of --WUA-- delivered Hauptund Nebenkennzeichen with the procedure “Aufsehalten”, Fig.5 shows from a Wählunterardage --WUA-- to outgoing characteristics for the procedure “further inquiry” toward main plant, Fig.6 the characteristics for the dismantling one plays the violin between a main plant --Ha-- and a Wählunteranl ge --WUA-- existing connection by the participant of the selecting under plant --WUA-- introductory releasing and Fig.7 show the necessary characteristics for the dismantling of one between a main plant --Ha-- and a selecting under plant --WUA-- existing connection with by the participant of the main plant --Ha-- introductory releasing of the connection. It is accepted that it itself with the descriptive remark example around a main plant --Ha-- and several selecting under plants anachaltbare to it --WUA-- acts. The substations of the selecting under 0 lay close can only over the main plant connections to the public office manufacture. The feeder lines between the main plant and the selecting under plants are final at the feeder line ends by appropriate line transmissions both in the main plant and in the selecting under plant in each case. In these transmissions become in each case from the respective plant (main plant --Ha-- and/or select under n] ùge --WUA--) over the feeder line received S characteristic in indications converted, which are adapted to the line signal transmission procedure and/or the installation internal signal procedure. Further it is accepted that over a feeder line either normal decadic choice pulse series will transfer or in addition, Mehrfrequenztonwahlkennzelchen in each case. For the connection establishment and the connection clearing and/or for the data for way attitude as well as for the data concerning Wegeund of conversation and the supplementing data, how e.g. over kinds of discussion and authorizations übertregenden characteristics become as main identifiers (see HK1 to HK4 in Fig.1) and/or as Nebenkennzeichen (see NK1 in Fig.1) transfer. As main identifiers 50-Hertz-Wechselstromsignale are used. As Nebenkennzeichen audio frequency signals within the range of the frequency spectrum of the usual clay/tone choice procedures are used. The 3s of audio frequency signals can be transferred thereby also as Mehrfrequenzkennzeiehen - e.g. as combination of several frequencies -. If however only a smaller number from indications is to be transferred to, it is favourable to use only one audio frequency. If in the latter case of the 425-Hert - clay/tone is used, for its production in each plant the necessary mechanisms anyway are present, then has mau in addition the advantage of the NIehrfaehausnutzung and thus saving at otherwise necessary zusatzlichen means for the signal frequency production. In the following to be still described, in soft way with this also audio frequency used for other indications by 425-Hertz a larger number of Nebenkennzeichen is be formed can. As main identifiers 50-Hertz-Weehselstromsignale are used. By main identifier e.g. HK1 the vermittlunEstechnischen Informatio4s nen - e.g. the data for way attitude, as well as over Wegeund Gesprächszustaud, more important to HK4 in Fig.1werden - transferred. Transferred authorizations by the Nebenkennzeichen - e.g. NK1 in Fig.1 - supplementing data, for example data concerning the Gespr chsarten, u.dgl. The Nebenkennzeichen is sent Amraser directly afterwards to the Hauptkennzeiehen and/or a given time to the main identifier, whereby the latters take over thus the zusatzliche function of a key symbol. so the Hauptkennzeiehen transferred in each case does not only steer as so-called key symbol the connection Empfangsund evaluation mechanisms for by means of the Nebenkennzeichens to transferring audio frequencies, but it steers also at both connecting ends during sending main identifiers and Nebenkennzeichen an interruption of the transmission of language, in order to avoid a disturbance Hauptund/or clay-frequent Nehenkennzeichen. This interruption of transferring the language becomes in each case of. dern the Nebenkennzeichen preceding main identifiers by way of introduction and, if a Nebenkennzelchen follows the main identifier, at least for its complete duration one extends. The abolition of this interruption takes place after Hauptbzw. Nebenkennzeichen with a stormed time delay, which is longer than the greatest possible break between a main identifier and following Nehenkennzeichen and/or between two frequency sequences belonging to a Nebenkennzeichen and whatever is longer than the greatest possible impulse break tent, in the latter case, thus between two following each other, belonging together main identifiers. From the managing also it follows that the main identifiers must of the Gegenanlage will at any time receive to be able and that it in addition, like the Nebenkennzeichen, by other indications, as for example Sprachsignale to be not interruptible to be allowed. During sending the main identifier (and Nehenkennzelchens) and for the time the following cable back TLA dung (return) no receipt may take place at the appropriate sending end. Those managing mentioned 12 time delay during the disconnection of the interruption of the language transferring prevents unnecessary Anund switching the interruption of the language transferring off. With the arrival of a main identifier in the Gegenanlage a receipt mechanism is held ready there for the admission of the clay-frequent Nebenkennzeichen. This holding ready time extends automatically after the arrival of the Nebenkennzeichens to the maximally possible duration of this indication. In that managing suggested way reached, 1. that an enterprise over blocked lines is possible, 2nd that is reduced length different by the addition of the main identifiers with Ncbenkennzeichen the need of alternating current characters substantially, that with simultaneous sending from both plants for the longer in each case main identifier reached 22 3. through is guaranteable, 4th that mechanisms for the frequency production with Mehrfrequenztastwah] is muddled sharable that the Hauptkennzelchen is usable as key symbol, which is called that the receivers planned for multi-frequency choice for the receipt of Nebenkennzeichen only during a certain time interval to be made available to need and from there on a small number is not limitable and 6th that receiver own voice protection planned for the multi-frequency choice to need. The received Nebenkennzeichen is transmitted to the central control. This Nebenkennzeichen gives either for itself alone or also in connection with the preceding main identifier and in dependence of the existing in each case, certain switching conditions during the connection establishment and/or the different connections to characteristic Zustandskennzeichen of the central control equipment information, which causes the development more intended for the further connection establishment and/or for certain Umsehaltungen u.dgl. instructions. In the following the individual phases, in which during the connection establishment and/or during the existing connections an indication exchange takes place, are more near descriptive. 1. Proofs. Around traffic, that of .der main plant --Ha-- to the selecting under plant --AUA-- , opposite the entgegengeset2ten traffic, that runs from the selecting under plant --AUA-- to the main plant --Ha-- runs, one through reached to assign (Fig.1 and Fig.2), those are in each case as main identifiers for allocation transferred 50-Hertz-Wechselstromsignale depending upon sending plant (HK1 in Fig. 1 opposite HK5 in Fig.2) differently long. This means that with the simultaneous occurrence of an allocation impulse on the same line u.zw once e.g. of the main plant --Ha-- (longer main identifier HK1) and once e.g. of the selecting under plant --W/JA-- (longer main identifier HK5), only the allocation signal of the main plant --Ha-- due to his larger temporal length to reached through to arrive may. This means thus that the Belegungsslgnal of the main plant --Ha-- by simultaneous sending of the shorter allocation signal (HK5) of the selecting under plant due to overlay to be only in such a way shortened it can that in any case (of the main plant) a coming allocation of the selecting under plant --AUA-- - 6 - Nr.350B3B becomes caused, with beginning of receipt of the allocation characteristic in the feeder line transmission of the selecting under plant --AUA-- becomes closed this transmission for another, outgoing allocation. In addition it is into the Wählunteran ge --AUA-- guaranteed that signals, which are longer than a certified can lead the length of the Belsgskennzeäehens exceeding maximum length, not to an arriving allocation of the transmission. If this fixed maximum length is exceeded, then becomes an obligatory de-energizing for of the Wählunteraulage --WUA-- to the main plant --Ha-- going allocation and the Freägabe of the transmission of the Gegenanlage guaranteed. At the same time with the allocation of the transmission of the selecting under plant --AUA-- taken place there also the connection of the EmpfangsmitteI for the expected clay-frequent Nebenùkennzeichen, since the Beiegung works the le causative HauptkennT.eichen at the same time as key symbol for such Nebenkennzeichen. The Nebenkennzeiehen now following in direct connection to the main identifier serves the kind of discussion and/or a selected connecting direction and/or the authorizations of the calling substation for the marking. Depending upon number that at the same time to transferring Informaticnsinhalte of a characteristic has the Nebenkennzeichen the only Nebenkennzeichen or the combination of Nebenkennzeichen course-arranged frequency, which can be transmitted which can be transmitted. The indication length of the Nebenkennzeichens is so limited that into the Gegenanklage arriving minimum portion of the Nebenkennzeichens with consideration of a carrier frequency section operated over intermediate transmissions (short-circuit of the Sprechweges in the intermediate transmission during and to about 40 ms after completion of the Schlüsselzeiehens) for receiver evaluation is sufficient still perfectly. If only in each case a certain Nebenkennzeichen is to be transferred, like already mentioned, the 425-Hertz-Ton of the signaling devices of the respective plant for the formation of the Nebenkennzeichens is enough out. However if several different indications of different substations are to be available as Nebenkennzeichen, then it is possible to transfer by means of the 425-Hertz-Tones Nebenkennzeichen which itself from long and short audio frequency characters build up (e.g. Fig.2c), interrupted by certain breaks. Also hiebei the main identifiers have the function of a key characteristic. If the number of Nebenkennzeichen the available is to be still larger beyond that, then it is appropriate to plan an additional Nebenkennzeichenvariation by multi-frequency clay/tone choice characters. Hauptkeunzeichen and Nebenkennzeichen can be sent not at the same time in a direction and also not opposite arranged effectively. Becomes for example, in particular in the Direktw hIverfahren, those for the communications attitude in the selecting under plant --AUA-- necessary first number of the desired TeilnehmerkennzahI too fast after WahI that the Verkehrsrichtung to select under n ge --AUA-- selected, then the possibility exists specifying index that and/or the first choice impulses intended for the further connection establishment first choice pulse series itself according to the allocation main identifier iibertragenen Nebenùkennzeichen overlaid and so that this Nebenkennzeichens (e.g. NK1HK3 in Fig.1) cuts a part off. In such trap a perfect evaluation of the l transferred after the allocation main identifier (HK1) is no more guaranteed ebenkermzeichens (NK1). It must be repeated into such trap from there the l¢ebenkennzeichen (NK as NKI' NK'"). This repetition of the Nebenkennzeichens (NK1) can be transferred only in the u mltteIbaren connection to the last choice impulse (last main identifier NK4) to the first choice pulse series in such a way that it can be evaluated with security. In order to keep however the expenditure as small as possible to the Bestlrnmung of the last Wah] of impulse HK4 of the first choice pulse series, transferring of the Nebenkennzeichens at the end of each main identifier of a choice pulse series is again started, so that after the Ietzten main identifier of the choice pulse series takes place automatically transferring the Nebenkennzeichens (NK” into Fig.1) in its full intended length. In the regarded case the allocation main identifier is the first main identifier and the second main identifier is at least the last choice impulse of the choice pulse series following on the availability indicator. Regarding sending of the l of even characteristic renewed with each choice impulse each choice impulse can be called second main identifier. In this connection it is still important to be certain that - 0 Nebenkennzeichen in any case temporally longer is than ever an impulse break time between two WahIimpulsen. The managing treated repetition of Nebenkennzeichen has always with operating cases Bedeütung, which do not exclude a destruction of the Nebenkennzeichens. A repetition of the Nr.350636 Nebenkennzeichens after the first choice pulse series is not necessary, if an intermediate storage into the selecting under plant --AUA-- to transferring choice characteristics is intended, since into such trap transferring the choice characteristics steered by the centralized control only then takes place if with security both the first main identifier and the following Nebenkennzeichen are fully evaluablely stored. If for economy reasons for several line transmissions of a selecting under plant --WUA-- for example common Mehrfrequenztenwahleinrichtungen to be planned, which are turned on to the feeder line transmissions only for the time of the respective genuine need (so-called flying connection), then must when transferring audio frequency signals on losses are counted. This would mean that Nebenkennzeichen are lost to k due to disturbances nnen. If due to such St the rungsfalles Nebenkennzeichen is missing, the connection becomes by being missing the Nebenkennzeichens the connection with the most extensive restriction, as thereby for example changed the authorization marking of the calling substation or the marking of kind of discussion or the direction authorization marking such a marking if not from the beginning was assigned. Furthermore becomes with connecting traffic, in particular from the main plant --Ha-- to the selecting under plant --AUA-- and with being missing one itself normally to the main identifier HK1 following Nebenkennzeichens NK1 due to a disturbance the Hauptkennzeiehen HK1 a certain meaning for a kind of discussion assigned. With that managing mentioned change of the priority and Niehtweiterwahl within a before determined maximum Zwischenwahl2eit for example the engagement of a call marking takes place to an operator's position. In the case of change of the priority and choice of more than in the internal traffic necessary Kennzifferu a change-over can likewise take place on the operator's position. On change of the priority and choice of one as not to the internal traffic to the main plant --Ha-- recognizable characteristic number becomes a renewed authorization signaling of the calling Spreehstelle of the selecting under plant --WUA-- requested and the centralized control of the main plant --Ha-- transfers on recognition of a Amtsberechtlgung of the Sprechstelie of the selecting under plant --AUA-- as not to the Hauptaulage --Ha-- recognized, buffered characteristic number after change-over of the occupied feeder line on a free office transmission to the public office further. A condition hiebei is naturally the intermediate storage, which can be planned either in principle in the system, or however it is valid due to the change of priority off then the selected index. If in the case of the fact it results that indices were lost, a automatic connection of place can likewise be intended. Following the allocation main identifier for the allocation of a transmission of the Gegenanlage with the connection establishment of the selecting under plant --AUA-- to the Hanptanlage --Ha-- - thus to the allocation of a transmission of the main plant --Ha-- Hanptkennzeichen (HK6 HK10 Fig.3) transferred, those are substantially shorter than the allocation main identifier (HK1 into Fig.1), that for allocation with the connection establishment of the main plant --Ha-- to the selecting under plant --WUA-- one uses. It acts with the allocation characteristic of the Wählunteraulage --AUA-- to the main plant --Ha-- around internal traffic, then no Nebenkennzeichen following on the main identifier is necessary (Fig.2a and Fig.3). Only if it concerns the production of a resuming connection for example to the public plant, further Nebenkennzeichen is transmitted following the Hanptkennzeichen. In accordance with Fig.2 it can concern thereby three different Nebenkennzeichen. (Fig. 2a shows of the Wählunteraulage allocation main identifier which can be sent) ° the Fig.2b shows the Nebenkennzeichen NKZ, which, if a participant of the selecting under plant --AUA-- the Rufnurnmerngeber of the main plant --Ha-- selects (code choice), of 200 to 300 ms long audio frequency beside characteristics consists. Against it the participant of the selecting under plant is --AUA-- in the main plant --Ha-- a local loop bundle without entrance to the Selbstwëhlferndienst reach, or concerns it a direct-access branch, then also the Nebenkennzeichen (NK3) can be transmitted as a pulse rate, for example equal two for a long time or also two differently is enough for audio frequency characteristics following the main identifier (HK5). In the case represented in Fig.2c it concerns two characteristics of different lengths, between which a certain, defined break is intended. Nr.350636 target of the participants of the selecting under plant --AUA-- in the Hauptanhge --Ha-- with a local loop bundle with entrance to the direct distance dialing to be connected or it concerns a fernbereehtigte branch, l nn the Nebenkennzeichen (NK4) also of long and two short impulses same frequency to thus consist itself. In the available example the 425-Hertz-Ton is then sufficient for hearing character gift intended Slgnaleinrichmng for the formation of the Nebenkennzeichen. From the understanding it follows that a multiplication of possible Kennzelchenaussagen by is reached that produced several from an appropriate clock mechanism and from the respective Schaltzustaud kennT.eichnendan, which will transfer differently/or equal long characteristics (Fig.2d) depending upon need Schalünitteln lining up steered Nebenkennzeichen (e.g. NK4 in Fig.2d) RST. On a repetition of the Nebenkennzeichen following the last Hauptkeunzeichen of the first choice pulse series can with the traffic of the selecting under plant --AUA-- to the main plant --Ha-- are done without, if it concerns, as in the available case, office traffic and far-truely into the public plant only take place may, if a selection signal of the public office were received. The W h .eichen the public office not been waiting and prematurely not further-selected, then it is usual to release the connection. It concerns on the other hand a house connection between a participant of a selecting under plant --AUA-- and a participant of a main plant --Ha--, then transferring of a Nebenkennzeichens is necessary for conveying special information about calling branch for example the their authorization likewise not. For the by-election from there also no special condition exists concerning the waiting period for the far choice. If the Nebenkennzeichen sent following the allocation main identifier is lost in office traffic (e.g. NK4), because for example into the Hauptaulage the receipt mechanism in time one did not turn on, then the kind of discussion is changed and the connection is considered as house connection. Also in this case with the choice by more Kennzfffern, than for the production of an internal connection are necessary, and/or with choice of a characteristic number deviating from the internal numbering, either the connection to the operator's position is switched or in addition, by the centralized control of the Hauptaulage --Ha-- a renewed authorization check of the Spreehstelle of the selecting under plant --AUA-- arranged and further during office authorization recognition in the main plant --Ha-- the reversal to a free office transmission and the transmission of the buffered indices over the local loop arranges. 2. Lane-occupied. The condition “lane-occupied” can be signaled either by Hauptkennzeiehen or by Nebenkennzeichen. If the condition is signaled “lane-occupied” as main identifier, then this takes place under the condition that also the Hanptkennzeichen for “end of selection” is intended, “branch-freely”, “Neben3s place-occupied” and “announcing” in the plant, since otherwise on the receiver side no distinction lane-occupies between and on see identical characteristic for the release characteristic of the called participant place which can be transmitted into backwards direction and further no distinction is possible in relation to releasing because of Nichtberechtigung (S. also sections 4 and 8). This is transferred meant that the Gassenbesetzt Kennzeiehen and the release characteristic, however this characteristic transmitted into Rüekwärtsrichtung are alike depending on whether it before or after the end of selection characteristic and the following branch free characteristic and/or branch occupy Kanus.eichen, the meaning as or as “Rückwärtsauslösung” keeps “lane-occupied”. The dominant in each case switching status therefore contributes the meaning of the transferred characteristic. The aforementioned release characteristic is called in the sections 4 and 8 de-energizing characteristics. The recognition of the Gassenbesetzt-Zustandes in the Hauptaulage --Ha-- can for example to a automatic, renewed path search and thus to a repetitive connection establishment to lead. Likewise this can lead also to a special signaling or a connection of place. The lane occupation characteristic could be transmitted also as Nebenkennzeichen following the main identifier “Nebensteile occupied”. Thereby is however a condition that the condition “lane-occupies” automatically also a branch occupation characteristic releases and that this branch occupation characteristic, which is given as main identifier is supplemented by “lane-occupied” - a specific Nebenkennzeichen. No. 350636 3rd end of selection. The Wahlendcsignal has with enterprise with impulse choice for traffic between main plant --Ha-- and Wählunteraulage --WUA-- apart from the actual characteristic function the additional task, for from the Wählunteraulage --WUA-- the following signals branch free characteristics and/or branch occupation characteristics reached through make possible, if the participant of the main plant --Ha-- further-selected. If thus in the selecting under plant --WUA-- it is stated that all choice information for the connection establishment in the selecting under plant --WUA-- selected are, becomes from the centralized control of the selecting under plant --WUA-- from transferring the Wshlendesignals as main identifiers over the feeder line toward the Hauptaulage --Ha-- arranged. With receipt of the Wahlendesignals in lo the main plant --Ha-- becomes there transporting further from Wahllmpulsen to the choice under plant --WUA-- prevented. Hiedurch is up to the connection clearing for all from the selecting under plant --AUA-- the following signals a so-called “competitive enterprise” with choice impulses from the main plant --Ha-- excluded. The temporal distance between transferring the Wshlendesignal representing HauptkennIS of indication and transferring the main identifier for branch-occupied " and/or branch-freely " places at the same time in the Wählunteraulage --WUA-- a watch dog time for impulse receipt. The Wahlendesignal could for his part already with a following Wahllmpuisserie from the main plant --Ha-- meet and are lost. In this case the so-called “competitive enterprise” must “Nebenstcllc occupied” with the following signals “branch-freely” and/or from the Wählunteraulage --WUA-- with security to be excluded. Became following from the Hauptaulage --Ha-- transferred Wah mpulsserie with the end of selection characteristic meets and became thereby following choice impulse in the selecting under plant --AUA-- arrives, then it is there guaranteed that “N “branch-occupies” the signals œ benstelle free” and/or only at expiration of a certain Verzugszcit after arrival of the last choice impulse from the main plant --Ha-- readdressed choice pulse series into backwards direction to be transferred know. Both by the end of selection characteristic HKll and when being lost this characteristic due to further by-election and by the substation free Kennzelchen F and also by the substation occupation characteristic B in the rain plant is prevented transferring further choice pulse series zumiudest up to there/towards arrival of a Mcldekennzeichens M. The loss of the Wahlendesignals by competitive enterprise is for the main plant --Ha-- without effect. It becomes this thereby balanced that during missing end of selection characteristic transferring the characteristic for branch free is evaluated " and/or branch-occupied " additionally also as “end of selection”. In this connection it is to be still mentioned that the characteristic is branch free” a long alternating current impulse from for example 200 to 300 ms, during branch-occupied” from two alternating current mpulsen by for example 50 ms exists, for a wozwischen break of likewise 50 ms is appropriate. This break (HK12 - HK13) is shorter, than the distance between the end of selection characteristic (HKll) and the first main identifier (HK12) of “it branch-occupies” with which the characteristic is branch-occupied” also when being lost the end of selection characteristic (HK11) recognizable “. Further the time between the end of selection characteristic and the following branch free characteristic and/or branch occupation characteristic (watch dog time) may do, as well as the dead time for the Weitergahe of the characteristics branch-freely " and/or “branch-occupied” after arrival of in the main plant --Ha-- further-selected Wählimpulse not more largely than which can be expected the intermediate choice time its, in order to prevent that still another second index from the Hauptanlsge --Ha-- to be after-selected can. This means thus also that in any case before the possible far choice in the main plant 4s --Ha-- and sending of a further pulse series due to it with security at least “branch-freely” and/or “branch-occupied” this far choice to have prevented must. This is valid also, if with the end of selection characteristic “colliding” choice information from the main plant --Ha-- from only one choice impulse and from there neither this exists a choice impulse nor the end of selection characteristic their Zielaulage reaches and in the main plant --Ha-- after this impulse and the intermediate choice time so following on it one further-selects. The reporting characteristic, which follows after the branch free characteristic, is to be transmitted as promptly as possible after the end of selection, characteristic. Also for this reason a firm time is fixed after the end of selection characteristic for following transferring of the branch free characteristic. Hauptund Nebenkennzeichen can consist of several single characters separated by breaks. 4. Select an unauthorized branch of the selecting under plant --WUA o by a participant of the public office. Becomes from a participant of the public office an unauthorized branch select under nl ge --WUA-- eye-selected and this Nichtamtsberechtigung in the selecting under plant becomes --WUA-- determined, then forwards or also after recognizing “branch-freely” and/or branch besetzt', at the latest however before announcing this unauthorized branch the connection is to be released. This purpose the protection becomes in the Wählunteranisge after recognizing --W RA-- and transferring the end of selection Kennzeiehens and for example after transferring NNebenstelle free” and/or branch besetztl however in any case before transferring the reporting characteristic from the ählunterardage --AUA-- a back release characteristic to the main plant --Ha-- transferred and thus the release of the connection arranges. This back release characteristic corresponds to the appropriate indications in accordance with the sections 2 and 8 and as Freischaltekeunzeichen is designated there. Since this back release characteristic can as back release character (de-energizing characteristic) at another time, which means in another Verbindungszustaud will transfer, with this characteristic in the main plant --Ha--, the plant, those regarding the Unteranisge --AUA-- also for office traffic as calling plant to be regarded, a connection of the operator's position can be steered to the Amtsleltung. It is to be noted that in this connection for to the selecting under plant --WUA-- continuous office traffic the main plant --Ha-- also as calling plant one designates (patent claims). In this way einund the same indication can serve different plant in each case depending upon connecting condition for the different marking in that. A such back release is natural with a Rtickfrageverhindung between a participant of the main plant --Ha-- and a participant of the selecting lower situation --AUA-- not necessarily. Also with a further inquiry with a nichtherechtigten substation of the selecting under plant --AUA-- transferring and/or evaluating characteristics given in backwards direction is necessary, u.zw. , even if it filter not over 'rAuslösen here " acts. R-S is referred hiezu to section 6. By-election and locking (Fig.4 on). Combination signals (HK14, NK6, HK15) may be receptible only after transferring the branch occupation characteristic (HK12, HK13, NKS), whereby the latter is sent to the characteristic for “end of selection” (HKll). This is guaranteed from the centralized control. Only after being present the branch busy condition the admission of combination signals (HK14, NK6, HK15) is possible. On scolded can via transferring a combination characteristic, for example via earth depressing the key or however via Nachwählen take place. Takes place locking on via by-election, for example from the main plant --HA-= out, then becomes in the centralized control of the main plant --HA-= guaranteed that in place the I.mpulsfolge of the after-selected number will transmit a special main identifier (HK14 and/or HK15) to representing main identifiers, which introduces for example the combination (HK14). A Tastendruclcende characteristic (HK15) can serve to indicate the length of depressing the key in order to make as it the distinction possible of a short depressing the key of a long depressing the key in reverse and. Long depressing the key for example switching on of a signal on at the operator's position, e.g. I place-call for or in addition, ranklopfent (additional Tickerzeiehen beina locking on) to mean to be able. Appropriate is the case during further inquiry introduction and 'tPlatzherbeiruf'Z, where also more briefly and/or a long depressing the key is usual. Subsequently, to the main identifier with Tastendruekanfang HK14, delivered with delivery of a depressing the key characteristic on the part of a substation, in particular the authorization will also transmit the depressing the key characteristic delivering substation characteristic Nebenkennzeichen (NK6). Zusatzllche time switching means of the receiving line transmission side determine the temporal duration of depressing the key on the basis the temporal distance first (HK14) and the second (HK15) Hauptkennzeiehens. In addition, it is possible that the length of the Nehenkennzeichens e.g. corresponds” to NK6 of the Tastendruck3 uge” around electric timing device of the receiving Leitungsiibertragungsseite the temporal duration of depressing the key from it determine to let. In connection with that managing mentioned conversion of the nachgewäb_lten index and/or characteristic number” which a vorbesümmte time after evaluating a substation freioZustandes and/or a substation busy condition of a calling and/or called substation it is selected to still mention is that this into dependence jeweüs of the existing switching status for the introduction of a certain shifting process, for example combination will transfer, evaluated and as Hauptund deviating from the index and/or characteristic number/or 3 Nebenkennzeichen from the origin plant over the feeder line to the goal plant. It is in this way guaranteed that both of the Teflnehmerstellen no increased expenditure is not necessary for the indication delivery, and in the transmissions and in the centralized control additional expenditure for transferring and the evaluation of the characteristics. At one to the selecting under plant --AUA-- itself following Nebenkennzeichen NK6, which contains further switching-oriented information, can indicate for example different combination authorizations to transferred main identifiers as characteristics of beginning of combination in case of locking on. Is after the Aufsehalten of the participants” on one locked on, by presenting the listener again free, then a branch free characteristic (HK6, NKT) and a following Meldekennzeichan (HK17, NK8) become as main identifier (HK16, HK17) with if necessary 13 following Nebenkennzeichen (NK7, NK8) the main plant --Ha-- transferred. The combination characteristic (HK14, NK6) could also with a branch free characteristic (e.g. HK16) meet. In this case however the NebensteUe free characteristic (F) to reach through, since it is longer than the combination characteristic (e.g. HK14) became. Thus the Aufschaltevorgangda it would then be will-terminated also automatically redundantly and the lining up connection would be connected through. This evaluation takes place in the centralized control of the main plant --Ha--. The Aufschaltevorganff is afterwards deleted. In order reached through the longer branch free characteristic (F) to guarantee, must the minimum distance between two combination signals as main identifiers be so large that the branch free characteristic (F) only with one of the combination signals (combination branch printing beginning and/or - ends) 23 meets and thus only by a signal to be shortened can. This means thus that signal of beginning of combination (HK14) and combination end signal (HK15) must have a certain minimum distance. If locking on is introduced by operation of a Flash key, in addition, then by simultaneous manipulation of the Flash key and a Zffferntaste another Vermitflungsvorgang than a “locking on” can be introduced, with the early recognition of the free line condition with after final combination procedure and, the early completion of the combination procedure following from it thus the branch free characteristic (F) in the main plant becomes --Ha-- as “testing characteristics” rated. 6. Meaning Wahlendeund of the reporting characteristic. 33 the marking of the Nichtberechtigung of a Ncbenstelle of the selecting under plant --AUA--, which is called without justification by the office, is only for connections possible, which in the normal connecting expiration also the head to arrange characteristic “announcing” since otherwise no distinction with a Rückwärtsauslösung is possible by the calling. Further also the main identifiers “end of selection” and branch must be transmitted freely” and/or “to branch occupied”, in order to be able to differentiate at the receiver side between releasing because of “Nichtberechtigung” and releasing because of “lane-occupied” before the connection clearing. The characteristic “end of selection” alone is not sufficient hiebei, since it can be lost by competitive enterprise. In addition a condition with the understanding procedure is that the reporting characteristic with unauthorized substations of the selecting under plant --WUA-- in the main plant --Ha-- one does not need. As reporting characteristic after the branch free characteristic a short alternating current impulse will transfer. For this Meldekennzeiehen no competitive enterprise exists. Following the Meldekannzetehen a Nebenkennzeichen can be transmitted (S. Fig.4 HK17, NK8). Usually however such Nebenkennzeiehen (NK8) is not necessary after announcing. 7. Further inquiries (Fig.5). The transmission of characteristics over the communications for further inquiry is only from the selecting under plant --AUA-- to the main plant --Ha-- necessarily, there only for the participants of the selecting under plant --WUA-- office traffic over the feeder line takes place. The signal ring printing for the further inquiry by a participant of the selecting under plant --AUA-- becomes by a characteristic of firm length, a main identifier (HK18) and thus an alternating current characteristic, transfer. The length of this KennT.eichens is to be measured in such a way that the further inquiry characteristic (HK18) at the receiver side from W it hffmpußen be differentiated can. Since the W'ahlünpuIse has usually a length from 50 to 70 ms, as further inquiry characteristic (HK18) a characteristic is used from 200 to 300 ms. The s Rückfragek “do not nnzeichen is bound at certain phases of the connection establishment. It is still mentioned that the allocation characteristic (HK19), that of the selecting under plant --WUA-- to the main plant --Ha-- is sent, likewise a short main identifier is. If the length is to be evaluated of depressing the key with, then this - as previously mentioned - can take place, as a Nebenkennzeichen (NK9) will transfer ftir the duration of the Tastendruekes following the main identifier (HK18). Usually however the Nebenkennzeichen transferred as Kenn2eJchen certainly more firmly would lie, but they are used and evaluated for the marking of the authorizations and the respective condition of its connection. Accordingly they are necessary here also only with introducing the further inquiry. The receipt mechanisms of the main plant --Ha--, which serve for the receipt of the Nebenkennzeichen, thus with receipt is the further inquiry of characteristic main identifier turned on. This is also a Verelnfachung for select under nl ge --WUA--, there the selecting under plant --WUA-- not to know it needs whether it gets lost around a first or second depressing the key in a further inquiry discussion acts. From the managing thus that although the duration of the signal ring printing will transfer must, the audio frequency signal of the Nebenkennzeichens (NKg) up to releasing the key follows to be transferred can. This kùnn however only of importance its, if the further inquiry characteristic with another characteristic were confusable, for example call for the switching person ". In Fig.5 main identifiers still shown HK20 to HK23 first and the represented main identifiers are to be supposed the HK24 to HK27 a last choice pulse series to represent. The long main identifier HK28 means “Rilckfrageende”. Becomes in further inquiry a not direct-access branch of a participant of the main plant --Ha-- selected, then this must in the main plant --Ha-- are marked. This takes place via that the selecting under plant --WUA-- the reporting characteristic does not transfer. Also transferring of other main identifiers and concomitantly transferring 50-Hertz-Wahffmpuisen the choice document become simultaneous --AUA-- to the main plant --Ha-- up to the complete release of the Rückfragever39 prevents connection. Hiemit is guaranteed that only one further inquiry between the two substations (substation of the main quantity --Ha-- and unauthorized substation of the Unteranlage --AUA--) possible and thus surrounding the direct trunk call to the unauthorized substation to be prevented can. Hiedurch is also possible it, the backasking substation and/or the local loop and thus the 3S Sprechetelle of the public office with inadvertently introductory rating to a free memo! to turn on ungsplatz to signal and/or there. From the managing it follows thus that the centralized control of the main seaweeds --Ha-- the introduction of the rating of a direct trunk call on a participant of the selecting under plant --AUA-- to only permit may, if the reporting characteristic (m) of the participant of the choice document --WUA-- in the main plant --Ha-- it arrived to which a storing of this characteristic (lV [) in the occupied office transmission of the main plant --Ha-- is intended. Transferring the Berechtlgungskennzeichen of the called substation takes place in form of a Nebenkennzeichens of Hauptund Nebenkennzeichen consisting of the characteristics for “branch-freely” (F) and “branch-occupies” (B). 4S 8th connection clearing. It here distinctive between releasing the connection clearing by the participant of the selecting under plant --AUA-- and releasing the connection by the participant of the main plant --Ha--. First it is accepted that the participant of the Wählnnteraulage --AUA-- the existing connection with the public office and/or with a participant of the main plant --Ha-- by presenting terminates s0 of the listener (Fig.6). In this case becomes from the selecting under plant --AUA-- a very long main identifier (HK29), which in its length both from the allocation characteristic and from the free characteristic and/or occupation characteristic and from the further inquiry characteristic differs, as de-energizing characteristic (HK29) to the main plant =-HA-- sent. This de-energizing characteristic (HK29) may be shortened through none of the other main identifiers in such a way that the meaning of another main identifier could be assigned to it. It may thus also after a possible shortening not the order of magnitude one of the aforementioned indications attain and must always as Freisehaltekennzeiehen be evaluable. After the transmission of the de-energizing characteristic (HK29) becomes from the main plant --Ha-- a back characteristic - a so-called unblocking characteristic (HK30) - expects. Between this two characteristics which is appropriate watch dog time is to be measured in such a way, dafl also during a retarded release, i.e. with returning the unblocking characteristic (HK30) at expiration of a certain, determined time” nevertheless the evaluation and thus the drawing to surely take place knows. With sending the unblocking characteristic HK30 in the main plant --Ha-- becomes the release both the line transmission, and the release of the other appropriate Schaltmittel of the main plant --Ha-- and the selecting under plant --AUA-- made. A if necessary necessary transporting of an initiation signal further over the local loop becomes from the centralized control of the main plant --Ha-- already with being present the de-energizing characteristic (HK29) made. After receipt of the unblocking characteristic (HK30) in the Wählunteraulage --AUA-- the there line transmission and the further if necessary still necessary mechanisms for a further connection establishment are again provable. It is now accepted that the release of the participant of the main plant --Ha-- and/or from the participant of the public plant proceeds (Fig.7), then becomes with the main plant --Ha-- a separation characteristic (HK31) over the feeder line toward the selecting under plant --AUA-- sent, u.zw itself this separation characteristic (HK31) of the other mentioned so far must of the main plant --Ha-- to the Wähiunteraulage --AUA-- sent indications, as for example the allocation characteristic, differentiate. This is reached by that one assigns to it for example a length from 1200 to 1700 ms. This separation signal (HK31) arranges in the line transmission of the selecting under plant --WUA-- the Rückwärtsübertragen of the de-energizing characteristic (HK29), which as managing (S. also Fig.6) mentions, to be so long must that it does not come also with gegenlä'ufigen characteristics into the order of magnitude one of the other long characteristics. This de-energizing characteristic (HK29) arranges then in the main plant --Ha-- like already described, after a certain watch dog time sending one £ntsperrkennzeichens toward the selecting under plant --Ha-- and afterwards the drawing lots procedure runs as when presenting the listener by a participant of the selecting under plant --AUA-- off. From the managing it follows that thus the release of the mechanisms of the main plant --Ha-- always with by the main plant --Ha-- sent Entsperrkeunzeichen (HK30) and the mechanisms of the selecting under plant --AUA-- always by the there arrival of the main plant --Ha-- sent ntsperrkennzeichens (HK30) to be released. Thereby it is alike whether a participant of the Wählunteraulage --AUA-- or a participant of the main plant --Ha-- and/or the public office the release by presenting the listener introduced. It leads thus with other words of a calling and from a called substation introductory Verbindungsaualösung independently of the direction of the connection establishment and the direction of the clearing to different, the respective feeder line sides firmly assigned characteristic sequences (S. Fig.6, HK29, HK30, and/or Fig.7, HK31, HK29, HK30). A final de-energizing of the feeder line an introductory first characteristic (HK30, unblocking character) thus always goes from a certain feeder line side --Ha-- out, while in the respective characteristic sequence HK29, HK30 and/or HK31, HK29, HK30 always precedes from the certain feeder line side outgoing first characteristics (HK30) this first characteristic (HK30) releasing second characteristic (HK29, de-energizing characteristic). When releasing the aforementioned characteristic sequence (HK29, HK30 and/or HK31, HK29, HK30) contains third, the second characteristic (HK29) of the connection from the certain connecting side releasing characteristic (HK31) as separator. First (HK30) and the third (HK31) characteristic always become from the certain feeder line side --Ha-- and the second characteristic (HK29) always from this opposite feeder line side --AUA-- sent. The second characteristic mentioned (HK29) is temporally so long that it is perfectly evaluable also with a receiver shortening by the third characteristic (HK31) or by a choice pulse series arriving from its direction. 9. Remote barriers. Both for connecting traffic Hauptanlage Ha Wählunteranlage WUA, and for connecting traffic Wählunteranlage WUA Itauptanlage ha a remote disable flag is intended, which has one duration of for example more grüßer equivalent 1 s and which is then sent by a transmission, if this is not ready for use for a coming allocation and/or also for the receipt of back characteristics. If necessary the remote disable flag knows received plant by this remote disable flag in that, if it see for example around the selecting under plant --AUA-- , the FreischaltekennT.eichen acts or if it itself around the main plant --Ha-- , the separation characteristic acts veraule t will to waive in order to reach so also the release the disturbed transmission and thus the disturbance and/or the “Niehtbetriehsbereit” - Zustaud. RST