DE1298118B - Time division data switching system with message-based sampling - Google Patents

Description

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The invention relates to a data exchange system; In addition to the subscriber according to the time division principle with message-bound combination, it also contains additional target information,
of scanning. Recently it has now been proposed that in the

In telecommunications switching systems, in addition to known time division switches, are necessary

the messages between external units, i.e. 5 memory elements in a central memory.

the subscriber and remote transmission circuits. This memory contains the allocation

also - z. B. in the construction and dismantling of connections voltage between the respective feeder and the

and in the execution of services - information - respective customers as well as all data and pro -

between the external and internal (cengrams, which are used to solve the switching-related

central) units exchanged. The external input i ° tasks are required. The memory is as ar-

With the corresponding internal temporary storage, units become part of a central control system that controls the

Units (e.g. register for recording dialing changes to binary messages from the

sign, signaling device). gladly to the respective related agreements

There are indirectly controlled telex operators. In such a messaging system known, the time division switching systems bound with a marking method * 5 are the work and the connections are identified by binary code words via a space-consuming customer, switch through. Should a connection be established through the use of a central memory the calling participant presses (local part - the assignment between the respective increase) the call button on his teleprinter. The bringer and the respective customer who z. B. on Loop of the local line is closed, and the a ° end of the connection setup from the result of the Call relay of the subscriber circuit responds. Since choice is formed, particularly cost-saving through a free selector converter is caused to lead.

associated caller to a free connection The invention is now based on the object of a

member of the hundreds group concerned. Time multiple data exchange system with subsequent

Once a free link is found, provide 25 directional scan to create the

the associated call finder has the calling advantages of the system already proposed

Participant a. At the same time, the first group and also, in a simple way, the traffic from external

selector, which is permanently assigned to the link, ner units with internal units of the office as well

proven. The exchange is now ready to accept dialing from internal and external units at the same time.

digits ready and sends the ready to dial 3 ° possible.

to the remote switching device of the participant. The selection This task is characterized according to the invention get to the selector converter, which solves them in that one central control and one central implements system-internal four-digit code. The dial set memory in which the assignment between the jezer are therefore internal customers during the election, occasional feeders and the respective customer which is available via additional call finder with the setting 35, are provided that the central control sets of the group and line selectors and with the via an input code multiple and an input subscriber are connected. Program channel to an input code converter and

It has also been proposed to connect the connection via an output code multiple and an output in a telex switching system via a program channel to an output code converter to an asynchronous combination multiple with centralized 4 ° that is switched through between the system units based connection set-up sets. and / or within the central control system. Such an exchange is provided in Teihiehmerschaltungen, borrowed connection paths and that the links, central connection establishment- central control information from internal additions, central occupancy transmitters and a central retriever or to internal customers in the same way chain broken down. Each subscriber circuit contains 45 conveyed like messages from an external to a combination sender and a combination transmitter to an external consumer,
receivers that are set to a specific combination assigned to the subscriber. In the context of the invention, there are two possible combinations. All abilities for conveying information from system units are z. B. to a nine-digit internal transmitter feeder or to internal recipients, multiple and a nine-digit receive multiple. 5 ° Are the internal feeders in the form of switch locks. These multiples for transferring the messages within the central control system are also used to control the connection, which they expediently use in the same way as the external establishment. When a connection is set up, the feeder and recipient of the input code first appear as a central connection set-up kit as the converter and the recipient connected to the output code converter. From the participants. Internal and external feeders are thus connected to the calling subscriber, the priority of the (switching) request signal for the assignment of a free connection call to the central control with the external kit is given to the transmit multiple. Equivalent to a grain feeder. If the external and binational memory in the connection set-up kit is to receive internal feeders or several internal feeders, the combination of the calling subscriber and 60 bringer groups assign different priorities so that the combination receiver and the combination receiver are assigned, a second input code converter for the emergency combination transmitter is required within the connection.

assembly kit. Thereupon, on the other hand, the combination are the internal feeders and receivers

Transmitter from the receiving manifold to Kornmer as programs available in the central memory,

bination receiver of the calling subscriber the 65 that is how the internal feeders and recipients operate

Ready to dial signal sent. The mentioned expediently directly within the central

Switching signal for the assignment of a connection control. They are then identified by addresses

assembly kit can only be evaluated by this one. In this case, bypassing the

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Input code converter a priority decision of the memory Sp in the word register WR available,

compared to the external feeders without one. It passes through the output code multiple ^ 4CF

additional input code converter possible. to the output code converter ACW, which the customer

In a central office, however, both can be determined. Finally, the central control takes action

internal feeders and consumers in wired 5 ZSt through the output program channel APK die

Execution as well as with programmable structure transfer of the status change to the customer,

to be available. In this case, the internal participants are During the election, the participant (or a

carrier lines and internal customer lines so- remote transmission) connected to a character register

like the internal code multiple at the same time as an additional, which represents an internal consumer. Of the

Borrowed connection paths within the central control io external feeder is, as described above, from

tion provided. Input code converter ECW identified.

Further advantages and details of the invention The after each read cycle in the word register WR result from the customer embodiment shown in the drawing of the central memory Sp , address is given by the output code multiple ^ iCF

Each subscriber is connected to a subscriber circuit TS via external lines EL i5 and controlled via the output program channel. From APK - passed to the output code converter A CW , the subscriber circuits TS lead external feed- This selects the bringer or receiver lines EZL, EAL to the connected internal receiver, the character inputs of the input code converter ECW or via an internal customer line. to register, off.

the outputs of the output code converter ACW. 20 The internal suppliers and customers can

These code converters have the task of the 1-out-of-N- also in the form of programs in the central

Code that exists outside the exchange for identification control.

tion of the participants is used, such internal feeders a request in the binary

Convert the code with which the central control unit to the central control unit ZSt, so they are through

ZSt works. The input program channel EPK and 25 an address that is currently in the word register WR of the center

the input code multiple ECV or the output central memory Sp or in an auxiliary register of the

Program channel APK and the output code multiple central control ZSt is marked. There

ACV connect the input code converter ECW or the address to the memory /? already available

the output code converter A CW is connected to the central link, an internal feeder line is

Control ZSt. In the wired version of the Zu- 30 liquid. After being called up by the central control ZSt

Bringer and recipient is the central control ZSt , the address of the internal feeder is taken from the word

also via internal feeder and recipient registers WR through the internal code multiple ICV dem

Lines IZL, IAL connected to the code converter - address register AR transferred. The further mediator

sen. With a programmable structure the internal admission process runs in the manner already described

The internal code multiple 35 ab is the source and buyer. With this procedure it is possible to set a priority

ICV provided that the address register AR and the differentiation between internal and external

Word register WR of the central memory Sp mitein-feeders to meet, as the input code converter

other connects. Each ECW is bypassed in the central memory Sp. To distinguish between priority

A cell is assigned to the feeder, which is used with the binary between different types of internal feeders.

coded address of each feeder can be reached. The 40 likes to meet the independent requirements

The content of this cell is in each case the address of the Ab- the central control ZSt is also a

takers. Provided in the mediation of each step priority register.

alternately, a read cycle runs. The input acts an internal unit as a recipient, so code multiple ECV is to be part of the address _also with a programmable structure of the internal register AR, the output code multiple ACV is the address of the recipient in the already legged part of the Word register WR of the memory Sp is written in the word register WR of the zen-connected. inscribed in central memory Sp. The address of the

It is initially assumed that the internal consumer can provide the start address of the appropriate Feeders and consumers as circuits exist in the program, with which the storage space of the pro are and is reached via internal feeder and consumer 50 grams. However, it can also do the lines are connected to the code converter. The address of a program associated with this program The mode of operation of the invention is intended to represent the memory cell allocated under this pre-feeder Suspension for internal feeders and internal acceptance from the program through substitution or indexing need to be explained. is attainable. In this case, the customer

A signal generator, which ascribes a signal to a subscriber from the office 55 address through an internal code multiple, acts as an internal feeder. register AR of the central memory ZSt for further The input code converter ECW, passed to the signal processing. For this, however, it is necessary via the internal feeder line IZL that the central control ZSt is external and included, identifies this internal feeder internal customers as well as various types of internal and forms its binary coded address with which the 60 customers differentiate can. This memory cell of the signal generator can be reached. The purpose is in each case a part of the user addresses in the word register WR. At the same time, through the input program, it requests the customer addresses from a code channel EPK from the central control ZSt . After the converter is evaluated. This code converter, the central controller ZSt, which has retrieved the address available in the input code wall independently or from the ECW in the central controller ZSt, can be present as part of a command decoder. He initiates the read cycle in the central memory Sp. However , it can also be part of the output code converter. The address ACW stored in the cell of the signal generator. The result of the address evaluation of the external customer is available after the access time must then be via an internal customer line, which

otherwise not required, _{s is} reported back to the central control ZSt.

In a switching system it can also happen that a feeder is connected to an internal and an external consumer at the same time. Is z. If, for example, a subscriber (external feeder) is connected to an exchange line (external customer) by the exchange, the dialing characters passing through the exchange must be recorded by a character register (internal customer) in the exchange to record the zone of the called subscriber. The time division method is used to solve this problem. The external feeder is alternately connected to the internal unit as a consumer and this as an internal feeder to the external consumer. In order to convey a step change from the external feeder to the external consumer, the central control ZSt therefore requires two work cycles; with the first cycle it mediates the step change to the internal unit, so with the next cycle the step change is mediated to the external recipient. The mediation processes take place in detail in the manner already described.

In the message-bound time division multiple data as switching system according to the invention, the central control ZSt thus communicates information between feeders and recipients of all types in the same way. The internal units can be present as circuits or as programs or as a mixture between these forms in the central control ZSt . Since the invention already contains a central memory, the internal units can be implemented as programs in a cost-saving manner. An exchange, whose internal units are only available in the form of programs, is not able to cope with a high volume of traffic because every "action" is the result of commands executed one after the other "actions" that can be carried out in parallel. Such an exchange can also process a high level of traffic.

Claims (10)

Claims: 45 1. Data exchange system according to the time division principle with message-based scanning, characterized in that a central control (ZSi) and a central memory (Sp), in which the assignment between the respective feeder and the respective customer is, are provided that the central control ( ZSt) via an input code multiple (ECV) and an input program channel (EPK) to an input code converter (ECW) and via an output code multiple (ACW) and an output program channel (APK) to an output code converter (ACW ) is connected that between the system units (ZSt, ECW, ACW) and / or within the central control 6 _Ö tion (ZSi) additional connection paths (IZL, IAL, ICV) are provided and that the central control (ZSt) information from internal feeders or to internal customers in the same way as messages from an external feeder to an external customer. 2. Data switching system according to claim 1, characterized in that each internal unit via an internal feeder line (IZL) to one of the inputs of the input code converter (ECW) and via an internal customer line (IAL) to one of the inputs of the output code converter (ACW ) is connected. 3. Data switching system according to claim 1, characterized in that the word register (WR) of the central memory (Sp) or an auxiliary register with the address register (AR) through an internal one to identify internal feeders or to select internal customers with the help of addresses Code multiple (ICV) are connected, 4. Data exchange system according to claim 3, characterized in that a priority decision is provided between internal and external feeders. 5. Data exchange system according to claim 3, characterized in that for the priority differentiation a priority register is provided between different internal feeders. 6. Data switching system according to claim 3, characterized in that a code converter is provided for recognizing the type of customer with the aid of part of the customer address in the word register (WR) of the central memory (Sp). 7. Data exchange system according to claim 6, characterized in that the code converter for recognizing the type of customer is an independent part of the central controller (ZSt) . 8. Data switching system according to claim 6, characterized in that the code converter for recognizing the type of consumer is part of a command decoder within the central controller (ZSt) . 9. data switching system according to claim 6, characterized in that the code converter for recognizing the type of customer is part of the output code converter (ACW) and that an internal customer line (IAL) between the output code converter (ACW) and the central controller ( ZSt) is provided, via which the result of the address evaluation is reported back to the central control (ZSt) . 10. data switching system according to claim 1, characterized in that at the same time Transport of a feeder with an internal and an external customer meets the requirements of the Feeder can be processed by the central control according to a multiple time method. 1 sheet of drawings