DE1941265C3 - Memory-programmed special service additional device for a telecommunications switching system, in particular telephone switching system - Google Patents

Description

The general trend in the development of modern Telecommunications, in particular telephone switching systems is the use of a central control device, by means of which as many switching processes as possible to be carried out and to achieve a high flexibility mostly in the form of a program-controlled central device to control all in the system is present. On the one hand, the high operating speed of Systems with electronic components require extensive serialization of the processing to be carried out Tasks and thus a reduction in the number of components in a system; on the other hand The flexibility achieved by writable programs not only makes it possible for a system processed various tasks one after the other after entering suitable programs, but has for the Users also benefit from the fact that modifications the task only results in changes to parts of the program without, for example, the wiring the system would have to be changed.

The present invention relates to a circuit arrangement for a telecommunications, in particular Telephone switching system, in which switching operations with the help of a program-controlled central Control device, which controls the sequence of all, usually on the basis of rule switching programs occurring switching processes controlling program memory, an additional program memory for special service switching programs and one of those specified by the program memories Has program flow processing control logic, and in the further switching processes with the help program-controlled sub-control devices are carried out, depending on a one calling and / or called subscriber station associated special service identifier and due to a jump command that is present in the command list for rule switching programs Special service identification corresponding special service switching program can be controlled in the additional program memory

There are already a variety of centrally controlled telephone exchange systems using the program storage technology known from data processing systems. So describes z. B. the German Auslegeschrift 12 49 353 the control of a telephone switching system in which a common Control of multiple private branch exchanges from a single one remote from them Setup takes place, the operation of which is controlled by a memory program.

The German Auslegeschrift 12 92 210 describes a circuit arrangement for control circuits with stored in program memories control programs and program commands in control commands converting commands in telecommunications, in particular telephone switching systems, whose program memory is divided into two memory groups, which normally have to solve different tasks, while in the event of a malfunction Storage group The undisturbed storage group takes over the most important programs of the disturbed storage group while restricting its own tasks.
From the Siemens magazine "Informations Fernsprech-Vermittlungstechnik" 1966, Issue 4, pp. 176-183, an electronic, centrally controlled telephone exchange system is known, the central control element of which contains self-controlling wired programs for carrying out the switching tasks.

In the "Nachrichtenentechnische Zeitschrift" 1966, page 122, the system ESS No. 1 is described for its control is a high-speed computer, which is used to generate the control commands from a wired Logic exists using the stored program. This computer receives the commands for Execution of the arithmetic operations from a program memory in which the entire "intelligence" for the Control of the mediation and testing processes is included. This calculator also contains all of them Information intended for special circuits. For private branch exchanges, the system ESS No. 101 has been developed, of which in duplicate present control center consisting of a computer and two

3 4

Save, a program memory and a call- this embodiment is limited.

memory consists Fig. 1 shows schematically a telephone exchange

For the aforementioned technology, it is also a management system according to the invention,

known, an additional memory for the Abspejche- F ig. 2 a breakdown of the core memory of the

tion of commands to provide all the services 5 sub-control device.

received, which the subscriber of a private branch exchange in Fig. I are the essential assemblies

should also be offered (e.g. short number, central control device ZSf with its control logic St

Priority, conference, etc.), Pas reading out this and with its two program memories, one for Commands from the additional memory take place in this case rule switching programs (RSP), the other for

with the help of so-called jump commands. io represents Special Services Placement Programs (SSP)

The object of the present invention is as well as the partial control device TSt with its subscriber

therein, in a telecommunication, in particular telephone recorder data memory SP (z. B. core memory) and their

mediation system in which mediation processes with the help of data processing equipment DVE The participant

a program- controlled central control device TS of the individual subscriber stations TIn

management, the special services have flexible 15 via a common address rail AS (T. B.

and to make it economically insertable. . using a scanning device (scanner),

This is achieved in that this special service access to the central control device ZSi and to Mediation program memory a special sub-control device TSt The program memory RSP

service-specific command (e.g. call forwarding) and carries out the usual switching

the address of the subscriber station involved via a process (e.g. inquiry and transfer) through; the

common data channel to a special part are processes that are required in all systems

control device transmits, in which the program memory SSP experiences <% t alone or in

corresponding memory of stored and interrogated cooperation with the sub-control unit TSf the

ter subscriber data this together with the pre- Special services. The partial control device TSt leads

The information given on new commands is processed 25 such special service commands, for which accordingly

which in turn have the common data - their individuality need for variable memories

channel for the purpose of further connection establishment to the pro or / uinj additional »hardware«

program memory for special service switching programs Both the rule switching programs and

grams fed to the central control device, the special service switching programs contain a

will. 30 series of commands that are permanently in the system in hard-wired

The advantage of the invention is that for the ter form are stored, the commands corresponding Realization of memory-oriented special services that correspond to the instructions in address form

are to be kept ready in large numbers in the future, one for the program to be executed and each

Additional device is provided that initiates a specific series of commands without a specific address.

extensive advance work in the basic equipment 35 tet With such a command, the

Can be retrofitted The disadvantage that a partial control device TSt activates the termination

Advance payment of special service placement programs of their work phase by means of an acknowledgment signal from

for the retrofitting of services bring with them central control device ZSf reports the processing

would be, through a clear organizational result, the central control unit

Separation not only of both _{types of program, control 4} o management ZSi via a common data channel (change

mediation programs for the basic equipment and senschiene AS), of which also those for processing

Special service switching programs, avoid taking any required data (e.g. connection

The special service switching programs are supplied with number)

still separated according to special service switching service sending and receiving side.

gram and special service information, 45 Since in the case of special service switching processes, the redie is stored individually and other information is processed together with gel and special service switching programs. If the homely run alternately several times, a standardized storing information is advantageously stored in this individually in connection with the special service to arrangement in an individually separated way Rule together with information generated from the incoming control unit and special service switching programs in a sub-control unit the simplest way possible for each participant as well as for each special service in 55 special, memory-oriented special services. These change measures sub- control device TSt with their variable information can then easily be entered from the outside via a core memory SP containing writing devices. In addition, the necessary and ready for operation. If that is the case, the data processing device is then repeatedly controlled both memory for special service switching programs for information processing, as well as for the 60 (SSP) , which are advantageously "separate" on a control of the change in said memory Storage disk (e.g. a thread storage) can be used, moreover can be accommodated through the use. On this separate storage a common data channel also for the disk can, for example, special service brokerage: iprogramexchange of information and commands for special services for all possible Services, the effort required can be kept low from the outset. 65 are wired, although only one system-specific

In the drawings, an exemplary embodiment of the rapid selection of services is required. The special Invention with the special services required for understanding are subsequently added Details shown, whereby the invention is not limited to being realized by adding new programs to the

Writes core memory SP of the substructure device TSt . The storage disk for special service switching programs is only required if the processing of any special special service by means of the sub- control device TSt is provided at all. The execution of the jump command is therefore conditioned by the presence of a special special service storage disk: the jump condition can, however, also be set manually by a contact.

By means of the measure described, special services can be retrofitted by inserting a Sonderdiensl thread memory board SSP , connecting the partial control device 7 ".Sf and writing system-specific processing programs into the program area of its internal memory (core memory SP) using an external writing device. The in the program area of the memory SP saved as command sequences can be exchanged as required by simply rewriting. The retrofitting of special services does not require any soldering work and, moreover, no interruption of operation is necessary during the retrofitting time.

To input data into the core memory SP, the writing device 5 requests the sub-control device TST from the central control device ZSf. in order to avoid that possibly running special service processes are disrupted by input processes. The core memory content can be read out via the writing device S for control purposes. The address and content of the cell read are displayed. To monitor the write process, a read cycle is carried out automatically after each write cycle. The writing device 5 compares the data to be written with the subsequently read out cell contents. A subsequent write process is only released if both pieces of information match.

The partial control device TSt consists of a core storage device SP and a data processing device DVE, the latter having a control unit, an adding unit and registers for input and output. In the fig. 2, both program data and subscriber data are stored sequentially. At the beginning of the memory SP is the program area 1. which is for the individual special services (e.g. authorization 2. Revaluation 3. Partial addresses 4. Call forwarding 5. Call forwarding 6 areas in which the subscriber data are located individual memory cells are subdivided, are delimited by "area addresses" (0000 0500 1000)

(Address of the first memory cell of the associated area). A working phase of the partial control device TSf begins with a request from the central control device ZSf. at the same time provides a Ansprungadresse which the performed program designated (jump from the special service Vermiitlungsprogrammen in the program area of the sub-control means TSfJl The Ansprungadressen m are the special service Fädelspeicherplatte of the program memory SSP hardwired and TSt the Teilsteuereinrichlung in the control unit of the Datenverarbcitungscinrichmng DVE. the in known from data processing systems manner from Belehlsregister. instruction counter. decoders and sequence control is supplemented to the full memory address this initial address, the first instruction word in the program area 1 of the core memory SP is read, which in turn contains a jump command, with the help of the jump to the beginning of the particular. The use of a jump command at the beginning of the program enables the position of a special program in program area 1 to be selected as desired without the need to change the position in the special service threading memory latte of the program memory SSP wired jump addresses must be changed. In the event of changes, a new jump address only needs to be written in the general part of the jump command consisting of the latter and the operation part. The same applies if a different program is to be assigned to a start address.

The basic sequence of the programs will now be explained using the example of the special service »Rufweilerleitung«.

During a call state on the part of the subscriber station TInA , after a target element monitoring this state has elapsed, the central control device ZSt is requested, whose control switching program in the program memory RSPnun examines whether a special service switching memory SSP is provided in this system in the form of a separate threading plate and a sub- control device TSt is connected. If this is not the case, the call will be continued. If, however, a memory SSP for special services is available, this is controlled by means of a jump command contained in the command list for rule switching programs. The special service switching program forwards the address of the called subscriber station ΏηΒ together with the special service identifier »call forwarding« to the control unit of the data processing device DVE of the sub- control device TSt, where it is determined whether for the selected Tciincninci »icnc 77, -5 of the Sc-dcrd : = -;:! «R ·. · '« - »! ·?« ·! «-; - tung«. If this is not the case, then the control switching program of the central control device ZSf is jumped back and called again. If this special service is available, the internal program in the core memory SP searches for the “call forwarding” area based on the area address transmitted by the central control device ZSf (e.g. 2250). which is read out and added by the adding unit of the data processing device DVE to the address of the called subscriber station TInB . The result of the addition is the address of the memory cell in the "Call forwarding" area, which contains the address of the subscriber station to which the call is to be forwarded. After this call forwarding address has been stored in the output register of the data processing device DVE , if the selected subscriber station TTnB has not picked up in the meantime, an acknowledgment signal is sent to the central control device ZSi , which then monitors or carries out the further connection setup.

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Claims (2)

Patent claims: I. Circuit arrangement for a telecommunication, in particular telephone switching system, in which switching processes are carried out with the aid of a program-controlled central control device, which has a program memory which controls the sequence of all switching processes that usually occur using regular switching programs, an additional program memory for special service switching programs and a program sequence specified by the program memories has processing control logic, and in which switching processes are also carried out with the help of program-controlled sub-control devices, depending on a special service identifier assigned to a calling and / or called subscriber station and on the basis of a jump command present in the command list for regular switching programs, a special service switching program corresponding to the special service identifier in the additional Program memory is controllable, characterized in that this r special service switching program memory a command specific to a special service (e.g. B. Call forwarding) and the address of the subscriber station involved via a common data channel (AS) transmits to a special sub-control device in which these are processed together with the specified information to new commands based on in a corresponding memory (Sp) stored and queried subscriber data which in turn are fed to the program memory (SSP) for special service switching programs of the central control device (ZSt) via the common data channel for the purpose of further connection setup. 2.Schaltung arrangement according to claim!, Characterized in that the sub-control device (TSt) has its own memory (SP), in which the individual special services are regionally separated from each other, and a data processing device (DVE), which is used to control the relevant memory location in the memory and is used to process all received information.