DE2062577C - Method and circuit arrangement for searching for and selecting free connection paths in a switching network of a telecommunications system, in particular a telephone exchange - Google Patents

Description

Should a telecommunications switching system via a multi-level switching network If a connection path is to be switched through, a free connection path leading via the switching matrix must first be determined will. If there are several free connection paths, one of them must be selected. Various methods are already known for this purpose. Of interest here are those processes where where an occupancy memory is used, in which the operating states of sections of the switching network are recorded, e.g. B. of intermediate lines, and with the assistance of son central control devices free connection routes are selected.

When searching for free connection routes, not only the operating states of sections of the route are closed take into account, but the mutual assignment of these paths must also be recorded. This can /. B. be done with the help of one and the same memory, including doit z. B. each with the operating state of a Wepestückes at the same time the addresses of those places of the memory are stored in which the operating states of the further sections of the road are stored (see German readings I 251 816. 1 253 769). But if the assignment of the Paths, e.g. B. by relocating intermediate lines to adapt to other traffic conditions changed, the addresses concerned must be changed at the same time, those in the intended memory are stored. The use of the memory for search and selection becomes obvious impaired by connection routes. It is also already known to assign the sections of the route in to be recorded in a memory separate from the occupancy memory (see German patents 1 190 518, 1,275,149). Here, according to the registered route search procedure, you can alternate between the relevant Save information about the operating status and about the assignment ·> οη sections to t. '. take and evaluate. Everyone who leaves memory especially according to its use train appropriately. Dj switching field of the switching can have several coupling elements (see German Patent specification 1 190 518). it can also consist of each multi-level sub-switching fields composed of scm Tie grouping of the coupling field can thereby be chosen so that the connection paths can uui a coupling field input, which at one is above all Sub-switching fields extending input coupling is located, leads to a coupling output, which leads to one is also located over all sub-coupling fields only eccentric output coupling stage. In the so-called reversal grouping however, the connection paths can also return to one and the same switching stage, with both switching matrix inputs and auJi Switching network outputs are provided, which are also present at the same time in one and the same sub-switching network can (see German patent specification 1 275! 49; German Offenlegungsschrift 1487 929).

It is also already known, the assignment of the route sections of the coupling field instead of with a Capture storage with a hardwired allocator / u. Such an allocator delivers after delivery the address of a stretch of road, the addresses of those places in the allocation memory that the Save the operating status of the further sections of the route (see German interpretation document 1254 703). Fm Such an assigner thus represents a template that records the assignment in question (see German patent specification 1 275 149, Spajte 2, lines 50 to 52). In this case too, changes to the routing of Intermediate lines and special measures for other changes to the structure of the coupling field to adapt the assigners to the change in the switching matrix. Such changes are inconvenient and errors can occur that only become apparent during subsequent operation do. In order to avoid similar errors, it is already known (see German disclosure document 1 562 140), a memory that al? Bclcgungsspeu her the operating states of interconnections of a switching network are detected from these interconnections to build up individuc'l related contacts, their Operating allowance depends on the operating condition of the intermediate lines and under the addition of coupling rectifiers interconnected to contact mothers are. In order to enable the use of such an allocation memory, there are still further switching measures required.

The invention is also based on the object to avoid the aforementioned inconvenience and the associated source of error. However, it does not affect the version of the lictricbs- / uständc of parts of the road, but rather the assignment of parts of the toilet. The invention shows one Path. how advantageously even the effort for an allocator or memory to record the allocation the distance is at least reduced, if not completely saved. Relocations of Intermediate lines to adapt to the traffic conditions are usually only made at a certain switching stage of the switching network, so that it is for the aforementioned Purpose is sufficient to consider only the intermediate lines going out from there. When in on As is known, the other parts of the switching matrix are built up very regularly, so it can be used for a special device for recording the assignment can be saved for these parts (see German patent specification 1 275 149, column 3). In this case, the application of the invention is particularly favorable. the However, the invention can also be used when the switching network has a very irregular structure.

In addition to an occupancy memory, route search cores are also used in the invention, as is the case per se is already known (see "Nachrichtenentechnische Zeitschrift". 1968. Issue 4, p. 206). Accordingly, at the invention of a method for searching for and selecting free connection paths in a switching matrix assumed from several coupling stages connected via intermediate lines, in which information on the operational states of the sections of the coupling field can be taken from the memory elements of an occupancy memory and from the route search arteries to be used. According to the invention, this method is characterized in that when searching of the connection paths the connectability of the sections of two paths assigned to the storage elements in the course of connecting routes to neighboring coupling stages from the routing of route search cores is derived, to the intermediate lines connecting the relevant adjacent switching stages include that this includes the information on the operating status of sections of a coupling stage their evaluation are routed via the route search arteries that are connected to each of these sections of the route Intermediate lines belong, and that these details for the evaluation individually to * information about the operational states of such sections of the path can be assigned, each of which is associated with an adjacent Coupling stage connected to these intermediate lines are. By that in place of a memory or a wired allocator * or a template the route search wires belonging to the intermediate lines are used in the manner according to the invention, It turns out that when searching for and selecting free connecting paths, these intermediate lines are restricted must be taken into account. This is the case when such rearrangements are made in order to adapt the switching matrix to other traffic conditions or who they are because of a Changes to the development status can be made. It will also be seen that the absence of Intermediate lines are also inevitably properly taken into account. In more expedient Further development can be provided that to intermediate lines that a corresponding line routing have heard a single toilet searchader each time. In all cases you can use the derivation the commitment the information about the Conditions of operation of sections of a coupling stage prior to their evaluation via the route search arteries to be given to these toilets respectively connected intermediate lines. The information mentioned is individual for the evaluation Information about the operational states of such

assigned to sections of the road, each with an adjacent Coupling stage are connected to these intermediate lines. This assignment can then be made in to known way for the comparison of such information be exploited, which then results in the Wcgcführung free connection paths.

An application example of the invention The method is explained below with the aid of a coupling field, which in turn is an example of the in Question is coming multilevel switching matrices.

ao This switching network and the intermediate lines affected by the method according to the invention are shown in FIG . In FIG. FIG. 2 shows an arrangement which makes use of the path search cores belonging to the intermediate lines in question

as can be recognized in detail.

The F i g. 3 shows the arrangement of these route search wires in the switching matrix.

The I · "i g. 4 serves to illustrate a measure which enables certain areas of exclude times the coupling circuit when searching for connection paths.

To the one shown in FIG. The switching network shown in FIG. 1, made up of several coupling stages connected via intermediate lines, includes the sub-switching fields KCl, KG1, KGi and KG4. Each sub-switching network is divided into two switching stages. But it could also be more than two coupling stages. The various subswitching fields are connected in all combinations via a bundle of central intermediate lines, so the sub- switching network KG1 is connected to the sub-switching network KG1 via the bundle 3434. There are also bundles 5656, 5634, 7834, 7856 and 7878. These intermediate lines are at the output coupling stages Bl.Bl, B3 and BA of the four sub-

coupling spring connected. The coupling field inputs T and the coupling network outputs R are located at the other coupling stages of the Tcil coupling fields.

All sub-switching networks are essentially the same built up. In the case of the partial switching network ATCl, there is

thus gang coupling stage with the coupling field outputs T and coupling field outputs R from the coupling fields IKl Al .. IKVAU. Ten of these switching matrices each have ten inputs and eight outputs. The switching network lines 7 are connected to these switching matrices. The remaining six of these coupling multiples each have eight inputs and eight outputs. The coupling field outputs R are connected to these coupling multiples. Eight coupling multiples are provided in the output coupling stage A1 of the sub-coupling network KG1, namely the coupling multiples IKVBl ... IKVB%. Each of these coupling multiple has sixteen inputs and eight outputs, which are at the same time connections to which central intermediate lines can be connected. The coupling matrices de two coupling stages described are connected via Zwi lines in such a way that they come together! form a so-called coupling group. Of these intermediate lines are those with \ ze \ b \, \ za \ ki

ν * / 8

How to lead. This is indicated by the sign e ^{that dC} Be? This switching matrix is used when using the

_einz or connection of Koppelviclfac! "2 ^ schillings ^ s ^ U _{Eils one ge} Wegesuchdder The <l" e

mmim ^ mmm

x:

■ * ■

and sixth exits bzv ^ An ^ ^ ^ _for benulrten ^ ^le ^ " ² _f ^ _dcm ^ _{ht an} Wegesuch-

associated intermediate lines together with the associated connection path sought can be used. The selection circuit W terminal strips of the distributors of the relevant sub-fields, which, if several pairs of coupling fields are to be connected, are then connected to the common path search vein in each case jointly at the comparator V. So are z. B. the intermediate keys are available, selects a pair. The instructions 175 ... 875 as well as the associated common data on such selected route sections come the same route search artery 75 / each to a connection then via the output register AR to the central bar of the distributor of the sub- switching network KG2 and to the control device ZST. In the intermediate register ZR, which is a connection strip of the distributor of the sub-coupling in the central control device ZST , KG4 suffered to be connected. If the address of one of the consecutive to intermediate lines is available in parallel, then also switching matrices of an output that take into account io can be temporarily stored together with the associated common path search cores. The meaning of this measure, which is connected to terminal strips in each case, will be explained later. The assessment if the parallel guidance is retained even with the reallocation memory SP provides the information mentioned. In this case, if the address kv of a Koopelviel t. B. to the mentioned connection strips of the distributor »5-fold and the address kg of the sub-switching network, to which the central intermediate lines 186 ... 886 the switching network in question belongs, from the central control device 86 / connected to the control device ZST. The addresses are. When moving from central interim access to the occupancy memory via the input lines, it is then only necessary, analogously to register ER.

each jointly on connection strips of the Ver ao connection paths that are rearranged via the lines connected from the sub-coupling splitter. Since fields KG1 ... KG4 lead existing switching networks, the route search cores are also recorded, each connecting a switching network input of the coupling is then when searching for and selecting field inputs T with a switching network output of the connection paths forced the switching to switching network outputs R. One such Connection consideration. »5 weg can each have one switching matrix input and one in the F i g. 2 is an example of an arrangement switching network output of the same sub-switching network, e.g. B. shown in the search for the connection paths of the sub-switching network # (71 connect or a coupling the connectivity of sections of the path, here the field input of a sub-switching network with a coupling circuit of switching matrices of two in the course of the field input of another sub-switching network , from 30 coupling input lies in both cases in one of the routing of the paths already described - different switching matrix than the switching matrix output is derived from search cores to the intermediate lines connecting the adjacent coupling stages, which are hard when searching for and selecting a connection path, this is the case in one case The information about the operating states of these times the output switching stage of a sub-switching network path sections of the switching network are to be determined by the memory 35. In addition, for this switching network, that row line is to be taken from the memory SP mmen, over The occupancy memory Sp has the memory outputs one of the intermediate 1 ... 8 leading from the switching matrix input, via which the information about the line is to be interconnected with one of the operating states of the connections of a switching matrix intermediate leading from the switching matrix output. Delivered in the compartment of the switching matrix. In this 40 other case, a coupling matrix of the output memory outputs is via the switching contacts vl ... v4 coupling stage of one sub-switching network and a and rl the first comparison register A1 directly connecting switching matrix of the output coupling stage of the other bar. In addition, 1 ... 8 sub-switching network is to be determined at these memory outputs. In addition, the second comparison register R 2 can also be connected via the switching contacts wt ... w4, zl ... z4 and a central r2 connecting these two switching matrices, with 45 intermediate line being determined. The mentioned Kopthis connection occasionally goes via path search veins. Cell multiples can be known per se with the aid of FIG. 2 are the terminals / ... 18 /, 21 / ... provided for the connection of routing methods for searching and selecting connection search wires due to the use of an allocation memory at 18 /, 31 / ... 38 / and 41 /. .. 48 / shown to which they are correct (see, for example, German patent writers ipeicherausgangs 1 ... 8 and the second comparison 50 1190 518.1 275149). This can also happen if the sub- switching fields can be switched on by more than two coupling devices via the mentioned connection contacts. Have such steps by appropriate actuation.

Connection contacts can be achieved that the connection In the embodiment for the application

The coupling of the memory outputs 1 ... 8 with the second of the method according to the invention exists

Comparison register Ä2 via which is also shown in FIG. 2 55 field made up of several similar multi-level parts

marked path search artery runs. Thereby coupling fields, namely from two-stage sub-coupling

which is used in each case such path search arteries, the π the fields. The sub-switching fields are the same!

from the relevant switching matrix outgoing intermediate set up very regularly, whereby with allei

interconnections belong. The connection contacts are sub-coupling fields for the intermediate lines di

from the central control device ZST ^ r- 60 same sequence for connecting coupling

controls. The control lines required for this purpose multiply. You can therefore search for:

go from this central control device ZST and select one of a specific coupling

and are just like the field input controlled by them to a specific switching matrix output

Switching contacts referred to. The connection path leading to the comparison register is initially between Al and Rl the comparator V is connected, the 65 lines that each have a switching matrix from the voi

the information about the operating status of each other given coupling matrix input ^ betw. Switching matrix output

speaking connections of two switching matrices are attainable and the same places in the row fohj

equals and determines which connections have for the Tciikoppelfcld or the same used

11 ^U 12

belong to the two sub-coupling fields used, right. These two switching matrices are connected in pairs on their central intermediate lines 175 and 186 with the aid of the occupancy memory. Operating mode are checked, whereupon pairs of said seventh and eighth such intermediate lines for the communication path in the switching matrix IKVBX and can be provided at the switching matrix of the fifth AKVBVl. Such pairs of 5 and sixth connection are affected. The resulting intermediate lines then each lead to and the given assignment is to be taken into account when checking the occupancy of the same switching matrix of the output switching stage of the state of the central branch in question or to two single lines. This takes place in accordance with the corresponding switching matrices of the initial dimension of the invention using such switching stages of the two sub-switching matrices used. io central intermediate lines assigned route search-special measures to take into account a wheel. If it turns out that at least one of the assignments is free here because of the regularity of the two central intermediate lines mentioned, construction of the switching network is not necessary (see, by determining a central Zwideutsche patent specification 1 275 149, column 3). interconnection determines the entire connection route

Such measures are needed but to be at 15. It turns out that none of these central

If the intermediate lines to be used are free in a provided switching matrix, then there is a different one afterwards

Series line over which the provided intermediate pairs of switching matrices of the output switching stages

lines to be connected are to be determined. How to take into account Bl and BA, one of which

already given, a switching matrix is currently also being switched via free intermediate lines

each provided when the connection path is one ao from the relevant switching matrix input and the other

Coupling matrix input and a coupling matrix output of the coupling matrix via free intermediate lines from the

same sub-switching network connects. If it connects, the relevant switching matrix output can be reached. In the

against a coupling matrix input of a sub-coupling search for a connection path are

field with a switching matrix output of another other pairs of switching matrices detected, each

Sub-switching network, two switching matrices are each from one switching matrix of the output switching stage

times provided, and it is one of these two of a sub-switching network and a switching matrix

The output switching stage of the other sub-switching network that connects switching matrices and is to be used

to determine the central intermediate line. It is formed that have at least one central intermediate

also the respective existing assignment especially interconnection are connected. One coupling each

to consider. In both cases, the 3 ° f is now multiple must from the coupling field input and the other

inventive method for searching and Aus Koppeivieifach from Koppcifeidäusgang over free

select free connection paths applied, according to intermediate lines of the relevant sub-switching networks

that the connectivity of the sections of the road in question can be achieved. This repeats itself until an appropriate one

Central intermediate line detached from the line routing of path search cores is found or until all

which leads to the 35 possible pairs of coupling multiples that come into consideration here.

Intermediate lines belong. For the derivation of which have been authored.

bindability to this, the information about the operational When recording the pair from the coupling

states of parts of the path of a coupling stage, here the IKVBX and AKVBl play the following

of connections of switching matrices, before their operations. From the central control device ZST

Evaluation routed over the route search wires, the 40 is first the address of the sub- switching network KGl

to connected to these sections of the route and the address of the coupling network IKVBl dem

Zv / ischenleitung belong. They are then used for the input register ER of the allocation memory SP. Evaluation of individual information about the company supplies. At outputs 1 ... 8 of this memory

states of such sections of the route are assigned, each of which is followed by the information about the operating states

at the neighboring switching stage to this intermediate 45 of the connections of the switching matrix 2 KVBl . When

lines are connected. Thereby this information for the free being of a connection is thereby

Information according to the assignment of the connections, possibly an impulse, as information fm eat

compared to each other. When occupied, however, no impulse is delivered. All these

In the following it will be explained how this is done in parallel via individual pulses to the outputs when it is a matter of searching for and selecting v> duel connected lines of the first comparison of its connection path, each of which is fed directly to a register JR1, the eight register elements Switching network input of a sub-switching network with one. For this purpose, the switching contacts rI and rl are switched through before the switching network output of another sub-switching network. This switch contacts connects. It is initially assumed that the outputs ν I and rl of the central control device ZST in the output coupling stage of the one sub-coupling 55 are controlled. Then from the field and in the output coupling stage of the other central control device ZST, the address of the sub-sub-switching matrix is already a switching matrix KG4 and the address of the associated switching matrix has been determined, which is from the relevant coupling matrix 4 K VB I to the input register ER field input or . Switching matrix output is accessible. delivered, after which the allocation memory SP information is z as a the partial gears 60 coupled field of the operating states of the relevant connections KGL cherish Direction switching network input with the Koppelvielfachs4KKßI at Kopper multiple Ikva 1 via the spoke design A when switching matrix 4KVA 16 of Teilkoppel- 1 ... 8 be delivered, namely in the form of field KGA lying switching network output for occurring or missing pulses. This information is binding, so the switching matrix IKVBl are supplied to the output coupling stage Bl equipped with eight register elements as from the mentioned 65 comparison register Rl , but not directly. Determined switching matrix input accessible and but through routing wires that? U the many AKVBl the output switching stage BA often AKVBl outgoing intermediate lines gehöals ren accessible loading of coupling-coupling from said switching network output. For this, the Schaltkonukte wA, zl and rl

13 ¹⁴

temporarily closed. They will be about the same as the fifth «and ^ sixth ^^ ⁵ ^^

designated outputs of the central compartment Steuereirr icntung 4KlBl associated siiiu. Be free

Z57-controlled. The consequence of this is that in the above-A "" Wü "^ so ^ nlei ^ c ^ R ^

Transport route from Speicner exits 1 ... 8 to the indicated dn Je Angao.u "« => P ₅ tanrnh-ranrh

Comparative rfeister Λ2 die Wegesuchadcrn 7856 / ein- 5 element des Vergle.chsreg.ste « Rl ^ ^ nn ab ^ x also

add? are. Pulses can be sent to the comparison register Rl in the operating case ^ ¹ ! ^ "^^^" _e ^ l "^

can only be accessed via these toilet search lines. For this in none of these ^b : ^ld f. \ ^R ^ ™ ^e . ^m _e i; "f £; [ ⁰ ^ Z

e belong to the weave arteries 75 f and 86 / (see F, g. 3). Specification is, ^ "™ ' ^ch ' ^if ""'S'chs 4θί ^Γ ί

The "belonging" intermediate lines 175 and 186 are the mentioned connections of the Kopp K.Jfach _S 4AÄM

to the "fifth" and sixth connection of the coupling was free. The comparison ^ erm.tteU now Pair, ν

often connected to 4KVBl. Accordingly, the corresponding registers could be used in the b Jn

can only be supplied by the memory output and 6 comparison registers R I and ^Ä ^ _; 'n ^ n η s.ch je _A - _r

Pulses get to comparison register «2. You can - two statements about the free of, * n .h and s η b -

Find the seventh and eighth register element. Here, in the pairs d.r si.b π cn un.

Verdeichsreuisters arrive, whereby the _five eighth register elements give such an indication; ■ ^ n- ,.

Leitunesführerun «of the intermediate lines and associated are z. B. in the couple of the seventh governmentJ.m.m. s.v-

In terms of the path ucha.ern given assignment take into account- ^^ Indication ^^ nthahen ^ ^ J ^ ^ ^

^llg From the stored ^r 1 and 2 optionally free central Zwisehenkuung molded tst n ,.

Delivered impulses can in no way be used for comparison »borrowed the central Zwaschen.e.tang 17s.J, .m la ....

most important aspects. w.be. it does not matter, st. soft eighth red more serious information η about the r

contain other TeilCppelfeld apart from the sub- switching network KG4, this means that the am _; .hu

vom Vemmdunaswe, is touched. At the first unü ~ h! Uss of the ^ PP ^ ^ieU ^ ^kl ^^: ^ - \ _

second, connection of the switching matrix 4Ki B 1, central Zwischenleiumg 185 are free, st DV ^ rL.

namely, no central intermediate rings are given, 5 gives the casting result to the ^ etc, ^ ha

closed. Correspondingly, there are no / oval ones further, so a pair of such Reg, s J.rn nt.

Intermediate lines close. Accordingly, selects the election result via the output ^ ,,

are also ... no additional arteries leading to the central street; u. -incntung / .. / ^ f-- '. '

the. For the freeing of such a connection at the same time the n. Using zj.-ui.ii. Z.Ms.

Giving impulse cetane Jäh by no means / by \ er 3 = IeUt nc fcstle,;. UiR ₁ o, e der / usucn.nJ.jnJ, ..-

eleichsregisterÄZ. ^ odLr.h is prevented dun a selectJe Verv- Jimgsvveg be, rnm. λ r._ f_,

such connection ^. looking for a connection ^ nam !. : h nai.r ^ .- u about this central ^ <- * ^] · -

we <ies / that works via two telecommunication fields. touch ^ - to - clocks. This ze: Ura e Zwisch.ri.uU.r, _^;.!

is sighted. The other connections of the coupling device at the same time also üen /.;. bemn / ep.ien. η-, ι, ιο Us ^ _/;

often 4 ^ 1'Sl. apart from the fifth and se-th ₃₅ v-df ^ hs 4λ "Ι TM. nam'.cn den! unfu- oj _t s,, -

Connection, are taken into account, i.e. / um Ans.'hluÜ. Did it result in s,; n that κ, .η. ü - r.

Te.lkoppclfeld Λ (, 2 only central intersections h:, - r a. Based on, intersection .. · hl .1 IS ,,.

drove that on the fifth and sixth Aiiscnkas, nge 175 free 1- :. be it. because the An ^ nluw ... · ... u-

are closed. Dignity of connections /. Ii. sum K-ppel ·. leifach IKiBl .included s ,,.,. n., 1

Sub-switching network ΛΌ'4 / lead to sub-switching network K <i3 . 40 are -Jer s: i es. know the an, ch usse. . . α s ...

Thus, from the third i.nJ fourth Spe.cherausg.mg il-w-'lvioliach 4KVBl connected ^ nJ. nu

«Delivered ImnuKe mm V erelei.h ^ egister R 1 further- snJ. so _; , i the S,; che and choosing a \ erbmJu; ^

forward sem.'da. in the third and fourth \ usganu Je, way further on / aset / en. Thereby M e.-i ank ,, s. . ^

Coupling matrix 4KVBl central intermediate environment: n vm Konpeivielfa.hen the output -. ^ Ppeiscu! ^ ._-.

are affiliated with, de / u: n Teilk..ppelfelJ λϊ,.> fuh- 45 and Ö4 αλ berucksicntigen / tiuem K- _P ; .In the,

ren. namely to Bun.le, 7834 belonging /e.Urals belong to the relevant Kopp.-lf.-l.l: ing mg _ ..,

Intermediate meetings with Jen We ₂ jsuch.uiem 7834 / '. affect the coupling element output via true / wis _; «E

For this the Schaltkoniakte u-4, ζ3 and rl vorleitungen crrei - :! ih.ir are. H.erlvi w, ^: in m..i -

overlooked to close. yl'-iehen \ erlebnisschnUe from ■ ··, e s ^ vorst-enen, - -

For the vorliccer.don Betnebsfail jc.lo.h. so w urd-n wrote. In a corresponding way it is so long,

as already aimeuebcn. die Schaltkoniakte u 4. zl and continue until either a free central /.wi .., κ

rl temporarily decided. N ₁₁ Ch sequence Jer guide g: funJe: i is ojer until all c :: iei.M; n I ^ a: ire ·. on

Schrichcnen precedents are in the comparison head: lvi: lf.ieh; n der Kopp: istu e B. an.I Ö4 o; ra.- -

ree.stern Al and Rl information about the Betneb./usLM.iM has been s “.i. Fs can thereby atici erp ^ .- M.

states of the relevant departure; ^ v K. ^ p.-Uieif ^ l-.c 55 da «no: g.-suitable central intermediate line vorl.,:, -

2KVBI and 4KVBl. Each comparison recorder has eight the .o .. The circuit arrangement is so cineenc.ii.M.

Ridding.elcmente. in which jewciK a ^, Viaabc on- that only /.we, Ane iben. of those who ever travel, ..-

«- is taken. Information / which specifies in each other eni.prc- associated connection, in their comparison -. E,

Before the rcsistcrclcmcntcn are included. w.-iJc; ·, /us.imm :n cause. Yes, the connections and here they are

compared in pairs by the comparator V. Wer- 60 connecting intermediate line bi the selection ü: s

all connections of the coupling system 2 KVB I were free. VcrbinJuncsweg: s actuated w.-rü.-n

so the freedom-related details in W, e already given are confused: n. sinJ auca connection n-zsw eg-

all Recisterclemenien of the virglcichsrej-ist-.Ts R 1. provided, each cn: n kopp.-lfelJ: ma in? im.I

apart from the first and / wide re _; :, st, relenvent. a head _P : lfel J output of the same Teikoppe fel.ies

In the comparison register Rl you can see m, 1c! Il · An-b: n 65 vcihindin. For the marriage of such a connection Jung; -

only in the seventh and eighth register elements. way: except for one, each of them becomes an AiisgangAopp :; ■

because only these bumps Recisterclem: ntc via VVege -; - cH- stage of the running Teilkopp: lfcldes g: hearing

were adjustable "and / was from information, the Koppclviclfach, which both from the Kopp.Mfeldemgani:

and can be reached from the switching network output via free intermediate lines of this sub-switching network used, expediently at the same time all switching multiples of the output switching stages of other sub-switching networks connected to this switching matrix via central intermediate lines. In this way, one possible switching matrix of the output switching stage of the sub-coupling used is taken into account one after the other until such a switching matrix is found. which has at least one free connection to which no central intermediate line connecting two output coupling stages is connected. How this takes place in detail is explained in more detail using an operating example for the sub-switching network KG1. It is, for example, to connect a switching network of the switching matrix 1KVA \ to a coupling field output of the coupling field 2A'Γ416 through a connection path / u that only leads over the sub-switching network AG 2. This, first those of the switching matrices 2AKB1 ... ICL BH are to determine the Ausgangskoppclstufe Bl, which are also accessible from said Koppelfeidausgang about free Zwischcnleitungen both from said switching matrix input as. So be z. B. the Koppelviclfach 2AKBI from the coupling field access via the intermediate line 2ralM and from the coupling field output via the intermediate line izaXdhX. ts can only be used for the connection path if one of its eight outputs or connections is still free. In order to search for and select the connection path, such a connection has to be determined which belongs to a straight line via which the two named intermediate lines are connected to one another. No central intermediate lines are connected to the first two connections of the switching matrix IKVBX. They can therefore be used in this operating example if they are free. Intermediate lines are connected to the other six connections of the switching matrix IKVBX, two of which lead to one of the remaining three sub- coupling springs KGX, AG'3 and KG 4 . There they lead to the first coupling compartment of the associated output coupling loop. If these six connections of the switching matrix IKVBX are also to be taken into account for the intended connection path, the operating conditions of connections of the respective first coupling multiples of the output coupling stages BX, S3 and B4 are required when searching for and selecting this connection path. The intended assignment must also be observed when evaluating them.

The circuit arrangement shown in FIG. 2 is also used for this purpose. In this hall too, the central control device / ST first supplies the address of the sub- switching field KG1 and the address of the component 2KVBX to the input controller TR , whereupon the Uclcgunps> pciwi) cr SI 'about his Spei chcrausgänge first. .8 details of the Uctricbszustäiulc the outputs of Koppc'viclfachs 2KVBX supplies. by closing the contacts v2 and rX these Angal> s the Vergleichsregistcr Ri / ugeführt. After that, from the central Control device / ST sent the address of the Tcilkoppelfddcs KG3 and the address of the associated switching matrix 5KlBl / to I input register TR , whereupon tier licleguiigsspciehcr .SV delivers information about the metrics / usland of the connections of the coupling ielfaihs 3AKB1 via its memory outputs I ... 8 IN should be remembered that such information is also given in this example of operation as in the example of operation described above in the form of pulses n, the occurrence of pulses indicating the absence and the absence of pulses indicating the occupancy of the connection in question. However, this information is forwarded to the comparison register ft 2 via the path search ladder, for which the switching contacts w3. : 2 v.nd rl to be temporarily closed. The path search ladder 5634 / is inserted into the transmission path that leads from the memory outputs 1 ... 8 to the comparison register Λ2. As a result, pulses can only reach the comparison register R 2 from the third and fourth memory outputs. Such pulses are delivered when the third and fourth output or connection of the coupling multiple 3AKSl are free. Such impulses can be added to the fifth and sixth register element of the comparator. Rl arrive. Thereafter, the relevant addresses are supplied from the central control device /.Sl to the input register ER to take into account the operating status of the connections of the coupling box 4KVBX of the sub-switching network AG'4. The allocation memory SP then supplies information about the operational conditions of these connections via its memory outputs 1 ... 8. This time the switching contacts μ 4 .: 1 and rl are temporarily closed for the transfer of such information. As a result, pulses indicating the absence of connections can only reach the comparison register Λ2 via the Wef / 'suchadem 7856 /. Only pulses supplied by the fifth and sixth output of the switching matrix 4AKB1 can be passed on. You can get to the seventh and eighth register elements of the comparison register R1. Finally, the operating states of the outputs of the switching matrix IAKS1 of the Tcilkoppelfcldes KGX must be taken into account. For this purpose, the relevant addresses are supplied to the input register ER , whereupon the assignment memory SP supplies the operating states of the connections of the switching matrix 1 K KS1 via its memory outputs 1 .. σ. In order to pass on such information, the switch contacts nl ,; 2 and rl are temporarily closed this time. As a result, the impulses supplied by the kitten and fourth output of the coupling multiple IA ^ B1 can reach the third and fourth Regislerclemcnl of the comparative register Λ2. Now all Angaoen are collected over those connections which are accessible from the switching matrix Lach IKVlX from about connected there in the central Zwischcnleitungen Vcrgleichsregisler Rl. The mutual assignment of these connections is also taken into account in each case. If 7th B. is reached from the coupling manifold output IKVBXfI via a central intermediate line in a free connection of an ar :, ler switching matrix, then a pulse has come to the seventh register element of the comparison register Λ2 in the course of the processes described above, which indicates that this connection is free. Such impulses can reach the other register elements of register R1 in a corresponding manner. But Solclic pulses can not * get Kl to the first two Rcgistcrclcmcnten of Vcrglcichsreg'stcr because of ilen first two outputs Ivsv. Connections of the coupling multiples of the output coupling no intermediate connections are connected. In order to take these connections into account when searching for and selecting a connection path within the same coupling field, a special / 11 procedure is therefore required.

The> came / .. ü. happen through it. Jau first shun register elements of the comparison register Rl Jurch an additional control, organg provided by the central control device ZST au-gef ^r> Hr · wtr'.J. Im pi; Uj ir. Can be supplied in each case if a connection path / diverted to a coupling input and a switching matrix output of the same sub-coupling is to be selected.

After the above-described process metrics have been processed, the comparator reports Γ milk pairs ν of register elements of the comparison registers R1 and R2 to the selection circuit M. in which both associated register elements were previously supplied with pulses. The selection circuit H selects one of these pairs. Is z. B. the pair ai:> the eighth register elements selected. It is thus determined that in the sub-switching network * '2 the Zwr ^ icnleiturgen 2: ulrl and 2rü! 6M are switched over that row line of the KoppeKieliacfis 2 λΊ H 1 / i ^ ammen, in which the eighth an ^ ^: -U: L> b / w. \ output of this coupling array is. in which the central intermediate line 186 .includes; ·, is. If it happened that no pair of associated register elements of the comparison registers R1 and R2 were supplied with two pulses indicating the absence of connections, the connection path cannot be via the coupling! ^1st efach 2 Ki'R I are carried out. A different switching matrix of coupling element B2 is then to be assumed, which can be reached both from the portable switching network input and from the switching network output in question via free intermediate lines; the corresponding procedural steps then have to be carried out. Repeat this until a matrix is found. that has at least one free connection. to which no occupied central intermediate line connecting two output coupling stations is connected. or until all possible Koppchielfaehe have been taken into account.

The in the F ι g. 2 shown; The circuit arrangement is also suitable for, before the processing of the method steps described above, those coupling matrices of the output coupling elements S1. B2. S3 and BA to be determined, each of which was initially assumed. In this case, information is provided about the operating states of the connections of those switching matrices that are shaded by connecting lines. om occupancy memory SP , in which the switching matrix input to be connected and the switching matrix output are present. A corresponding procedure can be used here, both when these two switching matrices belong to different sub-switching networks and when they belong to the same sub-switching field. To this end, the central control device ZST first supplies the input register ER with the addresses of the sub-switching network and the switching matrix with the switching network input. The Bclegungsspeichercr then delivers via its memory outputs 1.. .8 information about the operating states of the outputs or connections of this switching matrix and thus also about the operating states of the intermediate lines connected there. This information is fed directly to the calibration register Rl. The addresses of the sub-switching network and the switching matrix with the switching network output are then supplied to the Fn üvjsregister ER , whereupon the occupancy memory SP supplies information about the operating states of the connections b / w of the intermediate lines connected there via its memory outputs I ... .8. This information is fed directly to the comparison register R1 . The comparison V compares in pairs the information in the register elements of the comparison registers R 1 and R2 and reports the pairs that only contain information about being free to the selection circuit W, which then selects the first pair in the order. Herewith are at the same time.

ίο as will be shown, a usable switching matrix of an output switching stage or two associated output switching matrices of two output switching stages are defined. The associated address comes to the output register AR and from there to the central control device, where it is temporarily stored in the intermediate register ZR.

If the switching network input taken into account belongs to the same sub-switching network as the switching network output connected to it 7u, e.g. As when part Koppe - field KG 2, a switching matrix of the output switching stage Bl selected in the manner described above, namely a Koppelvieliach. which can be reached both from this switching matrix input and from the switching matrix output via free intermediate lines. This is because only intermediate lines go to a switching matrix of the output coupling stage B2. the respective connections of the switching matrices of the associated i input coupling stage that correspond to one another. For example, only intermediate lines lead to the coupling multiple 2 K \ B1, which in each case originate from the first connections of the switching matrices of the 1 input coupling stage of the sub-coupling field Ä'G'2. The connecting lines 2; alM and 2ral6M belong to these intermediate lines. This rule allows for building. that the information about the operating states of intermediate lines or connections can be fed directly to the comparison registers A1 and Λ2 and can be readily evaluated by the comparator I 'and the selection circuit Ά.

This evaluation results in the first coupling multiplicity of the output ski> pp <_l stage B1 in the sequence , which can be reached via free connecting lines both from the coupling matrix input and from the switching matrix output. Its address is initially recorded in the intermediate register ZR so that, as already described, it can then be determined which connection or which row line is to be used for interconnecting the connection path that has already been found. If no free connection or no free row line is found, the channel and selection of a coupling network; > .chs the output coupling stage Bl to repeat.i. the switching matrix already taken into account previously need not be taken into account again, for which purpose its address temporarily stored in the intermediate register ZR is used. In this way, the switching multiples in question of the output coupling stage BI are to be determined one after the other, which is then followed in each case by the further method steps already described in detail for determining the series line to be used. "

If the switching network input to be taken into account is at a different sub-switching network than the switching network output to be connected to it, information about the operating states of outputs or outputs is sent to the comparison registers Rl and Rl in the manner described above with the aid of the addresses of these sub-switching networks and the switching matrices concerned.

Connections from Koppeivieifacher ,. which are sounded with intermediate lines that are connected to two multiples of different sub-switching fields. are. Otherwise, however, this time too, mutually assigned register elements of the input registers PA and Rl are provided with information about the operations. which belong to connections of coupling multiples or to intermediate lines connected there, which correspond to one another in the order, but this time are not in the same sub-switching network, but in two different sub-coupling lines. This time, too, the regular structure of the sub-switching network, which is also the same for all sub-switching networks, does not require special measures to be taken to ensure that an assignment is particularly taken into account z. II. the switching network input at the coupling; ·; ■. multiple IKlAl of the sub-switching network Ao 2. as opposed to the comparison register R 1 information about the additional states of the \ on this coupling / intermittent lines. If the switching field _v .'ane is in the switching field ielfach AKi-A 16 of the leilt ppelfeld Kl 4., the information about the operating status of the intermediate line going from the K ppclmultiple 4AT-1 16 is received. The information about the Beiriebs / ustäiule of rule lines, which depart from each other corresponding circuits of these switching matrices, .- · enter Registcrelemente, each u cncni! 'r.orcn / aar. in the first Registerelenicnt comparison Sisters R 1 passes accordingly the indication of operating state the intermediate line 2za \ b \. Irend the information about the operating status of the line A: a \ 6b \ arrives in the first register element of the \ eraleichsister R1. Ischenleitungcn These two lead to mutually corresponding ppclvielfachen the Ausgangskoppelstuien Bl and!. namely to the head multiple 2 AI R I and: IS '. In the other regirelcmente of the comparison registers R 1 and Rl assigned to one another, information about the operating states of intermediate lines, which also ^; .--, ci 1 s to multiples of the output coupling stages,; I and ß4 lead, which correspond to each other. If included in IDCI register elements of a couple details about Jas 1 reisein, this means that each of these mutually associated switching matrices ./■!.ei the output switching stages Bl and fl4 üigsweg extent come for Connectivity in question than one of these switching matrices from Koppelfcldeingang via a free intermediate line and the other of these switching matrices can be reached from the coupling field output via the free intermediate line. With the aid of the comparator V and the selection circuit W , the first of these pairs of coupling multiples in the sequence is expediently selected and made available for the connection path to be searched for and selected, for which purpose the address of one of these two coupling multiples is transferred to the intermediate register ZR . This is followed by the method steps already described in detail, by means of which a central intermediate line is sought and, if necessary, selected via which these two multiples can be connected. If such a central intermediate line is not found, then the determination of a pair of switching multiples has to be repeated, but the previously considered pair of coupling multiples need not be taken into account again. which is made possible with the aid of the address previously temporarily stored in the intermediate register ZR. Fs are then searched for and selected pairs of coupling multiples until a pair is found. that via a free central interim university! is connected or until all pairs of coupling multiples of the relevant output coupling stages that come into question have been taken into account. It can also turn out that! '* No free connection path is available. ίο In many cases it is desirable that there is the possibility of certain parts of a switching matrix, in particular certain switching matrices. to block their use, for example because they are faulty. When searching for connection paths, such switching matrices are then not to be taken into account as free path sections. For this purpose, the additional information about the free state jn: - er path sections supplied by the occupancy memory SP at the Srchc of connection paths is expediently not passed on for further evaluation. This applies to information that is supplied by the storage element of the occupancy storage device, to which no toilets have been assigned, because the switching network has not yet been fully developed. Conveniently, the A'eiterg.ibe is of such information about the readiness Prcizusiand blocked in the occupancy of the memory SP to the Vcrgleichsregisiern R \ and R leading from the memory outputs, 1 1 ... 8 line wires. In the circuit arrangement according to Γ 1 a. 2 are the directions Q \. . .ζ) 4 inserted, each individually corresponding to the Koppclfeklteilcn AO 'I.. . A (/ 4 are assigned. These 1 devices are influenced by interlocking contacts that are individually assigned to the coupling multiples of the sub-switching networks. According to this influence, these devices cause the transfer of the relevant information about the free state to be blocked. How this happens in detail , can be seen from Fig. 4, where the connection of the 1 in the direction Q 1 is shown in detail in those lines that can be connected to the memory outputs I. the subswitching KC '\ are assigned. the device Qi consists of individual elements 1.8. z. B. are formed as flip-flops. each of these elements is inserted into one of the cable cores 1. .8. in addition, each of these elements to a of the disconnection contacts IA: r /> 1 ... IAiAS connected, which are individually assigned to the coupling multiples IKl Bi. .AKVBH of the output coupling stage B I of the sub-switching network AT »I. If an A switch contact is opened, it causes. that the assigned coupling compartment is blocked. Its opening has the problem that the associated element of the device Q \ is no longer the potential via this disconnection contact as before _; is supplied. This puts this element out of operation and does not pass on any impulses that are fed to it via the wire into which it is inserted. In this way, the forwarding of information about the current state of intermediate lines, which lead from the coupling multiples 1 KVA 1 ... I KVA 16 to this coupling multiplicity, is blocked in this line core. Because of the regular structure of a sub-switching network, such information is supplied via the same memory output. This switching matrix of Ausgangskoppelsiiife Ii \ is therefore no longer included in the search of connecting paths. In a corresponding manner, animal facilities can be used

21 * 22nd

Q2 ... Q4 coupling factor of the output coupling element the potential via the connection element to this coupling element . .HA of animal into account Hei finding of ordered Absclialtekonlukt is weitergehbar. Hs will be excluded connection routes. However, as already mentioned, Hs cannot also be passed on by multiples of the input coupling stages via this contact if the switching matrix allocated to the switching matrix cannot be taken into account in the 5 . Ils the memory elements 1 ... 8 of the contacts are excluded then, as just-Sucl-.e of connecting paths using Abschält- if already mentioned. I for the paddock execution (J I antler operation set, the passing on of multiple IA ' VA 1 ... 1 KVA 16 tier Hingaiigskoppclstufc of information about the l-'rci / .iistand is blocked, drs Icilkoppclfeldes A'('I serve this, which is indi- them prevented thereby that a connecting viducll associated AbscliallekoiHaklc 1 / vial ... io is wanted, the over the locked Koppelviclfach IAic 16 (s. Figure 4). These are the Abschaltckonlaklc Eingangskoppclstufc of Tcilkoppclfcldcs K (J 1 jointly to the execution Q 1. Also the devices Ql .. .QA, which are assigned to the andc-If they are closed, are assigned via these disconnection sub-switching fields KGl .. .KGA , contacts also the potential | to Establishment QX are via disconnection contacts that control the coupling. Reaches this potential \ - not to 15 times their Eingangskoppelstufcn individually z.iigcdicscr execution, it will have a total of associates out of service, set in a similar manner to decoder and an closed over none of its elements, so that it appropriately as the Hinrichlmpuls as Information about the free state wciter regulation ζ? 1 can be operated, bcn. In the supply line of the positive potential \ - is Once a connection path has been found by means of the decoder Dl is ao each one of the contacts of the connection path or by pressing the lAifll. ..1Ατα16 inserted. Contacts that are assigned to blocked associated crosspoint contacts in the Koppclvicl Koppclviclfachcn are open. The times over which the connection path leads through to-Dckoderregistcr DRi is now if the sub-coupling s: hold.

AGI field when searching for connection paths. There are various methods that you can use to

the address of that Koppelviclfach 95 is already known (see German patent specification 1048 956

the associated input coupling stage, via SpaUc 17, line 8 to column 18, line 45). This Mc

that the connection route has to lead. With the help of these methods, you can also apply here accordingly

The decoder Dl is set to address duLS. For this 1 sheet of drawings

Claims (14)

Patent claims: 1. A method for searching for and selecting free connection paths in a switching network from several switching stages connected via ZwischenJeitungen, in which information on the operating states of the route sections of the switching network is taken from the memory elements of an occupancy memory and in which route search cores are used for telecommunications, in particular telephone exchanges , characterized in that in the search for the connection paths the connectivity of the path sections assigned to the storage elements of two coupling stages (51 ... 54) that are adjacent in the course of connection paths is derived from the routing of path search cores (3434 /. .. 7834 /) leading to the Zv-ischenleituiigen (3434 ... 7834) connecting the relevant neighboring coupling soaps belong to the fact that the information about Hi? -> ⁿ operating states of route sections a coupling stage (z. B. S1) are routed before their evaluation via the route search arteries (3434 /. 5656 /. 78787), which belong to the intermediate lines connected to these wagon sections: (3434, 5656. 7878) , and that this information for the evaluation is assigned individual information about the operational states of those sections of the path that are connected to these intermediate lines (3434, 5656, 7878) in an adjacent coupling stage {B2, 53, 54). 2. The method according to Ansp.uch 1, characterized in that the Speicherelei., Enten information about the operating states of connections of switching matrices of the relevant switching stages (/. B. Bl and 54) are taken and that this information according to the assignment of the connections to each other be compared. 3. The method according to claim 2, characterized in that two items of information, both of which indicate the vacancy * ° of the associated connections (e.g. 2KVBI / 7 and 4K51 / 5), when compared, have the effect that these connections and the one connecting them Intermediate line (175) are involved in the selection of the connection path. 4. The method according to any one of the preceding claims, characterized in that in the Extraction of information about the operating status of a section of the road as an indication of its being free an impulse, but no impulse is delivered as an indication of its occupancy. 5. Circuit arrangement for performing the method according to one of the preceding claims, characterized in that to intermediate lines (z. B. 175 ... 875), the one to each other corresponding cable routing, each shared a single path search wire (75 /). 6. Circuit arrangement according to claim 5, characterized in that an intermediate line (z. B. 175) under intermediate lines (175 ... 875) with mutually corresponding line routing in each case a connection (2 KVB 1/7) of mutually corresponding connections of switching matrices ( IKVB \... 2 KVBH) of a relevant switching stage (Bl) with a connection (4AiTZ? 1/5) -3 of mutually corresponding connections of switching matrices (AKVB \ ... AKVBK) of the other relevant switching stage (54). 7. Circuit arrangement according to claim 5 or 6, characterized in that the adjacent coupling stages are the output coupling stages (B I .. .54) of multi-stage sub-switching matrices (KGl ... KGA) , from which the switching matrix is composed in that the output switching stages ( 51 ... 54) are connected in all combinations via central intermediate lines (3434 ... 7834). to which route search arteries (3434 / ... 7834 / i belong. S. Circuit arrangement according to Claim 7, characterized in that each Teilkoppeik-M has an input coupler stage, in which both coupling field inputs (T) and coupling field gears (R) ar are closed. 9. Circuit arrangement according to claim ■ ~ and 8. dadur: h characterized in that connection ι paths are provided, each of which has a head ^: field input e nes sub-switching network (z. B. KGl
a header field output of another
connect the switching network (e.g. KGA) so that when - searching for such a connection path:
pairs of coupling multiples (ζ. Β. 2λ ^: and 4Ä'l 51) are detected, each of which is defined by e:
KoppeKielfaih (2A'F51) of the output stage (52) of one sub-coupling field (KGT- a coupling multiple (AKl oil) of the Auslj
coupling stage 54) of the other partial coupling!
(KGA) are formed that have at least **
central intermediate line (175) connected: and one of each Koppehici (2KVB) \ om switching matrix input and the λτ,
Coupling manifold (4Öl) from Koppelfeldai; -:
via free intermediate lines (2za \ b \, 4ralo; the relevant sub-switching fields (KGl. , · '
are attainable. 10. Circuit arrangement, uch claims:
or 9, characterized in that the connection · .. ■■■
paths are provided, each one head
field input ur d a coupling matrix output dcs> e! -. Partial coupling (e.g. ACl) \ erbinden, daP;
the search for a uerartigen Verbindungsv ...: the .veils except>: INEM to the output switching stage (Fi \ said Teilk belong <ppelfeldes (Ä'Gl) ;; ^<;; Koppelvielfac is [IKVBi), both as the kr pelfeldeingang also from Koppelfeiuausg. .as. over free intermediate lines (Izalhl, ΙζαΙόΛΐι this used 1 fast coupling field (KGl) can be reached, also at the same time all to this KoppeKicifach OKVBl) over central Zwischenleitunycn (133. .. 188) connected switching matrices (2KVHl ... AKVBl) of the output coupling stage : (52, 53, 54) other sub-switching networks (KGl. KCi, KGA) are detected, and that in this way a possible switching matrix of the output switching stage of the sub-switching network used (KGl) is taken into account after another, until such a switching matrix is found , which has at least one free connection to which a central link connecting the occupied two output switching stages is connected, or until all such switching matrices have been taken into account. 11. Circuit "arrangement according to one of the claims 7 to IC, characterized in that the BLlepunpsspeiclior (SP) memory outputs (1 ... 8) h.it. libcr do the information about the operating / iistündc of the connections of a con Much compartment are delivered that these Sneicherausgänged 8) via switch contacts (ι Γ, x 4 x rl ... ... · η 4: zl ...: 4: rl rl) a first encryption | leichsreg.ster (. Rl) direct and a. second «comparison registers (Ä2) can be switched on via Weaesuehadem (3434 f ό 7834 J), which belong to the intermediate lines (3434 ... 7834) not included in the respective switching matrix d-ß ■■" the comparison registers (Rl, Rj \ a comparisons, (V) and to this a selection circuit (U ') are connected and that an intermediate freezer (ZR) is required, in which the address of a switching matrix to be taken into account one after the other is an output, switching stage, intermediate store! 12. Circuit arrangement according to claim !, characterized in that shutdown compacts fU-ral ... \ kval6: IAvM ... ikvhS; ...) are provided, the indWidue !! d -.- n KoppehieHacher a KVAl ... lKVA \ b: 1 λ! 51 . . 1 AI S8; ...) .! er sub-switching fields ιλϊ, Τ. . .) are assigned,; nd the <.erl., ndsiv .. Jaii the! ■■ nen assigned heads' · -! fach? in the search ■ · ■ η connecting _{routes are taken into account as ir} eie pieces of the way, in that they pass on the relevant information "about the free state of the"Srv>;rhi> _{rai! S "} corridors (I. ... 8) to block the lines leading to \ ergleicherrcgWerr- {Rl. Rl). 13. Circuit arrangement according to one of claims 5 to 12, characterized gckenn / eichne .. that intermediate lines (z. B. 175 ... 875) with corresponding line guides: together with the associated common path search vein (75 /) common connection strips of the distributors Jer "relevant sub-switching networks (KG2: KCi4) are connected. 14. Circuit arrangement according to claim 3, characterized in that parallel cefühi-te intermediate lines (z. B. 175 .. 875: ~ 186 .. 886) together with the associated common path search cores (75 /: 86 /) together to connection strips of the distributors relevant sub-coupling fields (KGl: KC4) are connected.