DE1524212A1 - Method for ensuring the functionality of storage units in data processing systems, especially in switching systems, e.g. Telephone systems - Google Patents

Description

SIEMEIiS AKTIENGESEILSCROT Munich, the '"' -

Wittelsbacherplatz 2

PA 66/2037 P 15 24 212.3

Procedure to ensure the functionality of Storage units in data processing systems, especially in switching systems, e.g. telephone systems.

The invention relates to a method for securing

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the functionality of storage units for program-controlled Functional sequences in data processing systems, especially in switching systems, e.g. telephone systems. Such data processing systems generally represent very complex structures that are economical can only be operated if special measures are taken to ensure that through If any part of the system is disrupted, the entire system is not blocked and thus fails. These measures concern the monitoring of the actual data flow from one part of the system to the other Use of self-checking and self-correcting Codes as well as additional over-initiation controls for whole words and word blocks; monitoring of the executed Calculation operations for their correctness through arithmetic controls as well as programmed • Controls and monitoring of the control processes through parallel work of individual components, assemblies or even entire parts of the system. The last-mentioned measure is used in particular when a trouble-free continuous operation of the system is required, as is a prerequisite in telephone switching systems, for example.

In known systems of this type, there are consistently two independent central "

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Controls are provided that compare liter. Facilities with one another in the various levels are linked. These central controls are subdivided in a "known manner into a central control unit, "consisting of a computation unit and a program unit, and a storage unit which, in addition to the programs for Execution of the punctures transferred to the system, all data necessary for the operational process contains saved. '' -

On the other hand, the doubling causes the storage plant in systems with a large number of partially changing information and the associated information large memory requirements a considerable · ■■■ Increase in investment costs.

The invention relates to a method for securing the Functionality of storage units for program-controlled puncture sequences in data processing systems, especially in switching systems, e.g. intercom systems, with the storage unit corresponding to the different types of required information is broken down into several individual memories, each are provided twice and operated in parallel to each other. The object of the invention is to improve the puncture ability of the storage plant itself in continuous operation

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■ with less memory requirements for the storage unit to secure and thus to reduce the overall system costs. This is achieved according to the invention Achieved that only for the memory whose information is part of the normal workflow must be constantly available and must not be lost, parallel storage is provided that over Compare facilities work together, and that on the other hand only a few for the remaining memories a few, interchangeable, passive replacement memories are provided, which are used only in the event of a fault enter the puncture and use the memory information lost due to the malfunction otherwise stored and / or externally supplied equivalent: take up information anew.

The invention is based on the fact that the individual types of: information to be stored has a different meaning. A distinction can be made between information, whose Loss would permanently disrupt the workflow of the entire plant, and information whose Iferluat just a delay in normal work Would cause, because this information is renewed at short notice be, can. For the first-mentioned type of information, belong for example with reference to central

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Controlled telephone switching systems the information about the participants involved in a connection, connection sets and route pieces, the charge units incurred for this connection, further information about the state reached in the context of a connection establishment, as well as information on the localization of faults and the like. The second type of information includes, for example, all subscriber-specific information, such as authorizations, connection location, connection type and the like, again with reference to centrally controlled telephone exchanges. Information about the Eelegungsstatus of the individual participants, connection devices and sections of the line network, also programs for the individual operations within the scope of a connection establishment as well as the programs for traffic measurements, routine tests and the like, since all this data is new in the system within a short time, for example by punched tape , entered or ¹ . but can be reworked and are therefore available again in a short time. _:

A loss of the last-mentioned information in the storage unit would therefore only be a delay of the normal work flow. In order to

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but there is no need for double storage in the system itself. be duplicated .de'a memory work, executed while all other parts • memory work individually and supplemented by spare memory, the step in in case of failure of the disturbed Speichefteil and its infor-, inationen rerecord .. As to maintain the continuous operation of a plant already some Few _: Spare memories are sufficient, possibly even a ■ single "spare memory, when using such a combination storage unit with individual and parallel connection of individual memories, there is a considerable saving in storage space.

An increase in operational reliability can be achieved in a known manner by storing the individual items of information in a redundant bar position and by providing "transmission controls" which, in the event of a fault, cause the system to switch to a replacement memory. \ ^; :.

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Purely the hay absorption of lost information ■ There are several options depending on the type of information and the system. So much for this information are contained in other parts of the combined storage unit, they can simply be extracted from these be taken over. You can also use separate Input devices can be entered into the system by means of perforated strips and the like. - Finally there is especially for termination systems for control and telephone purposes nor the possibility of the lost information through additional external facilities to redetermine. ■ '

In a further development of the invention on which the invention is based ■ Procedure arise in particular for telephone switching systems with separated from the line network for the connection of participants with each other central control part for the production of connections running over the line network in cooperation with an Eelegungsstatusspeicher for the Searching for a route, which shows the occupancy status of the eye blocks of the individual sections of the pipeline network v / Erkea saved contains various options to be able to respond in the event of a fault in the occupancy status memory to re-determine the occupancy status within a short period of time. This can be done on the one hand with the help of ■

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a network test facility. Is against In the switching system also a connection memory is provided in the storage unit, which the Infor-S

information about those involved in each connection Contains paths and facilities stored, this information can be accessed, in that the sections of the route involved in the individual connections work in the occupancy state memory Spare memory must be marked as occupied. The latter method is less time-consuming and also leads to the goal faster.

In both cases, it is useful to determine and record the occupancy status of the line network in the backup storage requirements to prevent further connections and instead give the busy signal to the calling subscriber, otherwise errors may occur again can. However, this loss of time of a few seconds is hardly significant, especially then not if the determination of the coverage status of the line network is divided into groups and If there are requests to establish a connection between subscribers, groups that have already been checked, e.g. within the same office group fc not prevented,

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but, as in the case of undisturbed operation, can be dealt with immediately. . ^;

Another, less costly option for recording the occupancy status of the line network in a backup memory is, according to a special development of the invention, that when a fault occurs in the occupied state memory in the replacement memory, all the sections of the line network are written as free and new connections to be established be selected based on the replacement memory and that the path sections involved in a selected connection and possibly stored in the Yerbindungsspeicher 'are separated before each connection, so that the path sections involved in another connection at the same time the release and activation of the arr of this other connection participating participants and connection sets as well as the cause deletion of the associated information in the connection and / or occupancy status memory. _:

This solution is based on the following consideration. When a connection is triggered, only the participating! Participants and connection sets are activated,

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but not the sections of the route involved in this connection, and the sections involved are released in memory. If, in the course of the Y / e search, a section of the route that is incorrectly marked as free in the allocation status memory is reserved for a new connection to be established and marked as busy, then a connection is made with! of the reserved connection route, the already existing section of the route that is wrongly marked as free © connection due to the separation of each section of the route each time a connection is established. Since this game can only be repeated until an existing connection is regularly triggered and the route that was originally incorrectly marked as free in the occupancy state is actually free, this guarantees that over time the occupancy state of the line network in the backup memory is fully enrolled without additional effort, if it is assumed that all sections of the route are in good condition. In addition, this method offers the advantage that the occupancy status is automatically corrected even if errors are not recognized.

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The probability that the Brsatzspeicher the Eelegungsstatus of the line network in a short Time recorded contains * can according to further Training of the invention is still essential be increased that with each or only with each η-th connection to be triggered in addition to the one on this one Connection participating participants and connection sets also the sections of the route involved in the line network can be unlocked.

Furthermore, it is useful to give preference to similar routes when searching for a route using the To change the occupancy status memory from time to time, so that 2Udera the danger that existing connections are wrongly triggered are, is significantly reduced, double connections are in the process of separation the individual sections of the route in the line network are excluded in any case before each connection is established.

On the other hand, interference in the line network evoked deviations between actual and saved occupancy status of the line network by means of the routine checks of the Line network recognized and by busy writing

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the disturbed sections of the road in the Eelegungszuotandsspeicher be resolved.

Further monitoring possibilities consist in the further development of the invention, on the one hand, that in the lame of a periodically recurring control program in the occupancy status memory, sections of the route marked as occupied are monitored for their activation and that, if there is no activation message, the fault search is initiated within a predetermined period of time, or that on the other hand in systems with Devices for traffic measurement in the event of an inadmissible traffic restriction determined during the lame traffic measurement, the occupancy status memory is switched to replacement and. the occupancy status of the line network is reworked.

The method on which the invention is based thus offers the possibility of maintaining a Continuous operation with significantly reduced effort for the central storage facility a number of possibilities to even with such complex systems * as they represent telephone exchanges, the ^ Route search required occupancy status memory to be replaced by a spare memory without the Switching operation is thereby significantly disrupted.

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This applies in particular if the program for in- - ■■ applies to a replacement memory with a gate rank in addition to other unavoidable tax measures to maintain the rest of the operation of the Plant is processed.

Another Torteil results when the Brsatzspeicher nderprorgramme in undisturbed operating case as storage for S _o, mme for example for test programs or & VerkehrSKessprogr be used. In this way, the provision of additional storage spaces in the storage unit, which is otherwise required for these purposes, is superfluous, so that the need for storage spaces is further reduced as a result of the double utilization of the spare storage.

Further details of the invention are given below explained with reference to the drawings. Show in detail 1 shows the block diagram of a centrally controlled Telephone exchange,.

Pig. 2 the block diagram of the central control of the parallel operation,

3 shows the block diagram of the central controller combined storage unit according to the invention, Pig. 4 is a principle image of the line network to explain the, effect of in the occupancy tape Parts of the route incorrectly marked as free.

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Hg.1 shows the basic structure of a known Fernspreehvermittlur / gsanlsge with a central control part separated from the line network KIT, consisting of a central control unit ZS and the associated storage unit SP. The individual subscribers, for example A and B, are connected in a manner known per se via individual subscriber circuits TS to the inputs of the line network KN, the outputs of which are in turn connected to the individual connection sets VUe or VS or PS. These relay sets are largely relieved of intelligence functions and are limited to supplying the central control with information and receiving commands from the central control. Depending on the type of function to be fulfilled, a distinction must be made between several types of connection sets. The connection set VTJe is used solely to establish external connections and the connection set VS to establish internal connections and the test connection set PS to carry out switching network tests. If these connection sets are shown, additional connection sets are normally provided, such as eg. B- ■ Elective sets, for receiving the dial-up sets, connection sets for incoming traffic as well as special connection sets for interception connections, keypad dialing connections or the like. -

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In addition to the line network with the connected Subscribers and connecting sets are a series provided by partial controls. These partial controls form the interface between the relatively slow switching processes of the line network and the very fast working central control. These Partial controls consist on the one hand of the scanners AT and AV to monitor the subscriber circuits and the connection sets for the presence of an commands to be forwarded to the central control and, on the other hand, from the signal distributors SV-T, SV-V and EM for transmitting the commands of the central control to the various facilities of the speech path ~ network. The sub-control I / O also shown is used to connect input and output devices, e.g. to connect the punched tire transmitter IS for Input of control programs or the like.

All partial controls are via a common Information line bundle IL connected to the central control. This central control is the real thing Brain of the switching system and resembles an electronic computer in its operation, whereby the following tasks. things to do are: Regulation of the flow of information from and to the individual sub-controls, evaluation and processing

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the information coming from partial controls, Forwarding of the information that has been developed to the sub-controls and storage of information. The central control accordingly consists of one Arithmetic unit, which carries out the linking of the information and a control unit, which the program. process regulates and that with the arithmetic unit to the central control unit ZS is summarized, as well as the storage unit SP. On the single functional sequence «in the frame a connection establishment and release is here not discussed further, as they are of less interest in the context of the invention and are analogous to those known systems can be executed, only the following is briefly indicated in this context} at the beginning of each connection, what by means of of the scanner AT in the respective subscriber circuit TS is recognized, the calling subscriber will be contacted via the Line network KIT initially with one of the subsections connected, which sends out the dial tone and picks up the subsequent dialing characters. Only when the Directional dialing digits are available, the calling participants with separation from the election sentence connected to a connection set of the corresponding direction, namely in the case of an external connection with the Connection set VITe and with an internal connection with the connection set VS, the output of which is via the line

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network KN switched through to the called subscriber will. The connection of the individual connection; routes are carried out by the setting marker EM based on the binatell information supplied by the central control.

Analogous to the different information required for different phases of establishing a connection is the storage unit- S3? the central control appropriately divided into several individual memories. These are \ next to the Frograminspeicher for the individual 'function programs first of all

1. the $ eilnehrcers store, in which for each {participant an individual storage space is provided, which shows the accrued charges, information on authorizations and the current occupancy status

contains, ', -'' ^:

2. the connection memory, the information about which to -a subscriber connection facilities involved in each connection and containment pieces,

3. the Eelegungsstaatgpeleher, which shows the current occupancy status of the individual sections of the road

-the line network contains stored and based on

whose route search is carried out, 4. ' the connection set eicher with information about the current operating status and the connection position

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in the pipeline network for each individual connection set,. . "ν- ^:.":; .,: ■■ - ■; ■. . "..., ■ '5, the register memory, in which information required for the connection establishment, such as dialed digits _t ' progressions for routing ¹ and the like, is stored.

■? / Ie Fig.2 shows more clearly, the central ■ Control of such a "switching system for security a continuous operation a in two central control works working in parallel ZSI and ZS2 and two similar storage units SP1 and SP2, which have the comparison devices VG and VG-SP are linked to each other. It serves the parallel connection of both central controls does not mean that different tasks can be carried out at the same time, but only to perform one and the same task in parallel at the same time, using the comparator VG and VG-SP it is monitored whether the respective Results match - Plagued errors lead first to a repetition of the task to be done and, if the error persists, to an instant localization of the error, i.e., it is determined which part in which of the two central controls worked incorrectly, so that the undisturbed part is released for sole operation can. So, for example, the storage unit SP2 as

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incorrectly located Avorden, this is how it works Storage unit SP1 continues alone and supplies both central control units ZS1 and ZS2. The same applies to the Failure of one of the two central control units ZS1 or ZS2, or parts of them.

Deviating from the grouping of the central control according to FIG. 2, the arrangement according to FIG. 3 shows a 'grouping in which, according to the invention, only a few parts of the storage unit are provided twice, while all other partial storage units, supplemented by replacement storage units, are provided individually and with both Central control units work together. Representing the two groups of storage tanks, the arrangement according to Pig. 3 only a partial memory of each memory group, namely the connection memory as double storage VSpT and ySp2 and the occupancy status memory BSp as a single memory in connection with a spare memory ESp. While the failure of the double storage; is treated in the same way as the malfunction of one of the storage units SP1 and SP2 according to FIG.

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However, this assumes that the information that is no longer available as a result of the fault inations can be reworked within a short period of time.

However, this option is always given when it comes to static information, e.g. A iressungen _Verkehr8-n Bchlußlagen of subscribers, permissions, programs for special purposes such as routine inspections or, is that regardless of momentary operating state of the plant and normally elsewhere in the form of paper tape can be gripped, which have served the 'start-up of the plant, with the restriction however, that the loss only causes a delay in the normal workflow, but does not mean a lasting disruption of the entire operating process. For example, programs for instant fault control and fault localization are excluded from individual storage. The same applies in general to dynamic information, such as intermediate results of information processing, which are contained in the register and connection memories, among other things, or information about the current configuration status in the speech network, only if the possibility exists

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such dynamic ones. Information from other parts of the memory to take over can usually be on one Double! Storage can be dispensed with.

A special case arises for switching systems according to Pig.1 in relation to the occupancy status memory, the the occupancy status of the individual sections of the! • line network KIT. recorded contains. A loss of this information "generally has no effect on existing connections. Only new Connections to be set up are affected because, as already mentioned, the route search is based on the configuration status memory is carried out. Provided that the line network is in a short Time can be worked out again, a failure of this memory part only has the consequence that only for the duration of the reprocessing of the lost occupancy status information by the any requests that have come into operation, not be used to establish the connection: can. In the event of a malfunction, however, there is only a very small amount of this low percentage of those involved in such a placement ■ Participants connected to the system are affected, which is all the less important as a participant is anyway can not distinguish whether the desired by him

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Subscriber is busy or whether the busy signal is a result of a fault has been caused.

It therefore offers precisely the status memory working «storage part of the storage unit SP der Central control: the possibility of an additional Reduction of the total memory requirement, even if no connection memory is provided in the control system of the switching system, all of which are connected to each connection Participating participants, connection devices and V / egestücke of the line network contains stored and whose information can be accessed.

For example, every switching system has a test facility for testing the line network, for example in the form of the test connection set PS according to FIG of the line network can be used.

Another one that does not require any additional effort The method will be explained in more detail with reference to Pig.4 that in symbolic representation a known per se Line network KN shows, consisting of the switching stages A to D, which are each composed of several switching matrices, which in turn are analog Coordinate selectors from a large number of crosspoints,

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For example, protective tube contacts,. "exist, whereby the input lines of each coupling element can be connected to one of several output lines via the individual coupling point contacts Connection device connected. With reference to FIG. 4, the connections on the left-hand side, for example R and T, of the line network KIT with the subscriber-individual subscribers. circuits and the connections on the right-hand side, e.g. U and S, with the continuing connection sets. "

This line network is still known Way designed in such a way that the with each input and Output line linked control points in. Form of contacts of a known type each time a connection is established first triggered and then the crosspoints required for the connection are switched through will. The general consequence of this measure is that, due to a disturbed route search, no double connections arise "

On the other hand, this measure leads to .that in the framework the establishment of a connection

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marked as free in the configuration state. It is therefore irrelevant whether the sections of the route marked as free are part of a new connection: If this connection is released regularly, since each time the call is terminated, a free identification is also connected in the occupancy status memory and therefore the actual occupancy status is linked to that indicated in the occupancy status memory State matches. If, for example, the 'Y / egestück' of the coupling stage X in Pig. 4 is incorrectly marked as free in the occupancy status memory, although the connection from R to. S runs above this, the regular release of this connection leads in turn to "correspondence between the actual and stored occupancy status. If, on the other hand, this section of the route is temporarily reserved for a connection between T and U within the scope of a new connection establishment, this section of the route is activated before the continuation of the new connection to trigger the existing connection between H and S, etc., until a connection running over this path is regularly triggered.

If it is incorrectly in the occupancy status, it is more than free marked sections of the pipeline network so will soon, at least in times of low traffic

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a complete.; 'correspondence between actual and saved occupancy status reached. One can Therefore, in the event of a malfunction, we can immediately call for a new work the lost status information "n \ do without, if you tend to go all the way in the Urs at ζ spei initially marked as free. ν

A fault is less significant, the more the existing connections are regularly triggered. On the one hand, this can be achieved by continuously changing the preference for similar routes during the route search, so that, analogous to other chain decisions and voters, the free route section that is first in the order is not selected. Rather, connections to be established one after the other are distributed approximately evenly over all available sections of the path, and thus the risk that. one and the same section of the route marked as free is used for a new connection, significantly reduced. _^: '■';

This measure can still be very effective as a result are supported, - that when a connection is triggered, the sections of the route involved are also triggered and be unlocked with it. This circumstance has /

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following on from the example mentioned above, the result that when the connection between R and S is triggered, the subsequently via .the path section χ running connection between T and U is also triggered, so that / 3 is the original after triggering this connection Part of the road wrongly marked as free χ after that it is fatally free.

In systems in which the line network is designed from the outset in such a way that every connection is released If the sections of the path involved are activated immediately, this does not mean any additional measures / effort. On the other hand, in systems in which the sections of the route involved are only displayed as marked free in the ~ 32 storage state memory and only the connection devices, such as subscriber circuit and connection sets, would graze free, it would on the other hand, it is already sufficient if only with every η-th, "e.g. every fifth connection that triggers this Paths are also unlocked. In this way it is prevented that the central control is overloaded by the release processes! *.

The method shown last with reference to FIG. 4 also offers the great advantage that if errors are not recognized, the occupancy status memory

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corrected independently without additional measures If occupied sections of the road are wrongly classified as free. Marked are.:

In addition, there are also a number of options to allow for deviations between the actual and saved occupancy status through further checks to prevent the line network. The simplest control option is offered by each connection and those that take place from time to time Routine tests of the line network, whereby disturbed sections of the road recognized and by busy writing can be withdrawn from traffic in the reservation status memory without an additional blocking is required. · ■. '"

Another possibility is offered by a periodically recurring control program, according to which the occupancy status memory is stored sections of the road marked as occupied are monitored for their activation and, if a · Price switch message fails to appear within a specified period of time, and troubleshooting is initiated. Finally, in the context of traffic measurement, there is the; Possibility of any errors in the occupancy status memory to uncover - if namely an ■ inadmissible traffic restriction is determined, ofc-probably in the occupancy status memory the majority of the way

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of the line network ale "occupied" is. In this case it is to be expected that in the occupancy status memory a large number of sections of the route are marked as occupied, which are in Reality "are" free. The occupancy status memory is therefore expediently switched to replacement and the Eelegungsstatus the line network newly "elaborated.

Overall, this results in a large number of ■ Procedure to also store the occupancy status memory in telephone switching systems as a single memory to be able to operate its function in case of failure by, a spare memory is taken over, although this is dynamic information that ' .-subject to constant change.

15 claims
4 figures

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Claims (1)

ΡΛ 9/420 / 3855-4273 - ^:. ^ ^: · Ί / ■,. ';^{; /:} 'JJ T. : Pat e nt to s ρ r ü c 3a e To 'procedure for ensuring the puncture ability of ; Storage units for program-controlled functional processes in data processing systems, especially in Yermitt "systems," ζ _O B »telephone systems, with the storage • plant according to the various types of required ; Information broken down into several individual memories which are provided twice -are and parallel are operated to each other, characterized in that only for the memory whose information is in Bahmen the normal. Work process always available = must be and not be lost, parallel ' memories are provided, which can be accessed via comparison device-> work together, and that 'on the other hand, for the rest of the memory only a few, with each other exchangeable passive spare memory is provided, which only come into operation in the event of a fault and which Memory information lost due to the malfunction based on otherwise stored and / or from include externally supplied equivalent information, 2. The method according to claim 1-, characterized in that the storage of the individual information in redundant New UnteriagCfl £% ϊ $ Α ^ y ^ tSalz Ζ des Ancteungsgu. v. 4 9. ^ - 30- Λ 1S24212 PA 9/420 / 3855-427? . '■ ν V : VW- V ^J: "; have representation erfolgt.und ÜbermittlungskQntrollen provided ο in Störuhgsfall the Umgiteuerung ■ ■ · to cause a Brsatzspeicher ο A method according 'to claim t or 2 for vermi ttlungssinlagen with the Iieitungsnetzwerk-for connecting 2eilnehmern each other separate central control part ■ for the production: of verlaufen- via the line network to YerMnciungen in Zusssimenarfteit with an occupancy state memory for the route search, which the instantaneous BelegungszuBtand the individual sweeping pieces of the line network are stored, characterized in that "in the event of a fault" in the occupancy status memory, the occupancy status of the line network is worked out and with the help of a test device. written in one of the Jirsatzspeicher v / irdo 4. The method according to claim 1 or 2 for switching systems with the network of wires for the connection of subscribers separate central control part for the production and triggering of over the line network. Werk running connections in cooperation with an occupancy status memory for the route search, the the current occupancy of the individual 3Ö982Ö / 1Ö88 ΪΑ.9Λ-2.0 / 3Β.55-4273 Contains route sections of the line network stored, and a connection memory which contains the information about the route sections and facilities involved in each connection stored »characterized in that when a fault occurs in the occupancy status memory, the occupancy status of the line network based on the route sections listed in the connection memory is newly worked out and is written into one of the spare memories » " Method according to claim 3 or 4, characterized? that for the duration of the identification and registration of the Occupancy status of the line network in the backup memory Requirements for the establishment of further connections prevented and - instead, the busy signal is given to the calling subscriber » 6 »Method according to claim 3 or 4, characterized in that the reporting of the occupancy status of the line network is subdivided according to groups and that requests to establish a connection between subscribers in groups that have already been checked (ZoB ₀ within the same exchange group) are not prevented, but as ■ can be dealt with immediately in undisturbed operation * 90 9 8 20/1 08 8 BAD PA 9/420 / 3855-4273 7ο Method according to claim 1 or 2 for switching systems with the line network for the connection Central control unit, which is separated from each other by participants, for establishing and triggering via the Line network running connections in 2 cooperation with an occupancy status memory for the Route search, which contains the current occupancy status of the individual Tfegestücke of the line networko stored, and possibly a connection memory, which stores the information about the sections and facilities involved in each • connection contains, characterized in that when a fault occurs vim occupancy status memory in Replacement memory for all sections of the line network -as freely registered, and new connections to be established be selected based on the spare memory and that those involved in a selected connection and, if necessary, sections of the route stored in the connection memory are separated before each connection so that the pieces involved in another connection at the same time triggering and disconnecting the participants and connection records involved in this other connection as well as the deletion of the cause associated information in the connection and / or in the occupancy status memory » 90 93 20 / 106S PA 9/420 / 3855--4273 ϊ 8 = method according to claim 7, characterized in that, when a connection is triggered, not only the subscriber and connection records involved in this connection but also the path sections involved are activated ₀ ■ "" ■■ 9v method according to claim 8, characterized in that only for every n ~ th connection to be released next to the participants involved in this connection and "· Connection sets also include the sections of the route involved in the Line network are activated ° 10o method according to one of claims 7 to 9, characterized in that the preference for similar. • Sections of the route are changed from time to time when searching for a route based on the occupancy status memory , 11o method according to any one of claims 3 to 10, characterized characterized that by disturbances in the * line network evoked deviations between the actual and stored occupancy status of the line network by means of the at 5 der connection establishment or the Routine tests of the line network carried out from time to time »recognized and by busy writing the disturbed? / egestücke in the occupancy zuatandaapeicher be resolved" . · · ' to9a2of i {ιι PA 9/420 / 3855-4273 ■ ' 12cMethod according to one of claims: 3 "to 10, characterized marked j that lsi paralyze a periodically v / ieder- .. " Kehrenden / Kontrollprograisrns in the allocation status memory sections of the route marked as occupied g-eJ on ■ their activation will be monitored and that "at Failure of an activation message "within a specified period of time", the troubleshooting is initiated will" - " " . . . "'" ■'. 13.A method according to any of claims 3 to 10 for systems with means for Yerkehrsmessung, characterized ■ 'that connected the BelegungQEUstandsspeicher on replacement in case of an established in-'Bahmen traffic measurement impermissible traffic restriction, and the congestion state de _(s cable network newly developed will " . 14, method according to one of the preceding claims _; characterized in that the -, program for commissioning a -Brsatzspeicher with priority next to other unavoidable. Control measures to maintain the rest of the operation of the system are handled '-' ■■ ·. '■ ■ "■".'. ■. - ^; , - ■ "■ - ■ ;. ' BATH ORiQINAL " PA '9/420 / 3855-4275 15ο Method according to one of the preceding claims, "■: characterized in that the Irsatzspeicher in. Undisturbed operation as a memory for special ^: ■ programs (e.g. examination program, traffic measurement program) ■ .. are used =,. · 909820/1088