DE1283296B - Circuit arrangement for a centrally controlled exchange serving a telephone network and a telegraph network together - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY GERMAN WTWWt PATENT OFFICE Int. CL:

H04q

EDITORIAL

German KL: 21 a3 - 38

Number: 1 283 296

File number: P 12 83 296.1-31 (St 24389)

Filing date: September 14, 1965

Opening day: November 21, 1968

The invention relates to a circuit arrangement for a telephone network and a teleprinter network jointly serving, centrally controlled switching center.

It has already been proposed several switchable communication systems - for example Telephone and teleprinter systems - for the purpose of better utilization of the switching facilities to summarize a switching system and the setting up of connections controlling and effecting facilities (coupling network, Markieret, etc.) to be used jointly for all communication systems.

However, it can be quite desirable to use the coupling networks for telephone and telex traffic keep separate. This can be due to the very different size of the collective of participants and / or in the likewise very different traffic concentration of the two networks. In addition, in some countries (e.g. the Federal Republic of Germany) it is perfect Network separation between the telephone network and the telex network must be taken into account.

The object of the invention is to maintain a good degree of utilization of the switching equipment to ensure the network separation.

This object is achieved according to the invention in that each of the two networks has an individual Switching network is assigned with its own switching network control and that with the individual switching network controls and / or the individual connection paths in temporary information exchange standing further centralized organs of the exchange are jointly assigned to both networks.

This has the advantage that, in spite of the separation of the network, the coupling network and its directly assigned control organs (e.g. markers) for establishing the connection in each of the two Networks to be used by centralized bodies (e.g. billing, allocators, identification devices, electoral bodies, etc.) optimally can be exploited. It can be shown that the additional work involved for this Organs, as they are necessary for telephone traffic, is very small.

Data terminals are already reaching the subscriber stations to an ever-increasing extent both networks for use. The network separation results in the problem that one Data transmission between one connected to the telephone network and one connected to the telegraph network Data device is not possible.

Circuit arrangement for a one
Telephone network and a telex network
jointly serving, centrally controlled
Exchange

Applicant:

Standard Elektrik Lorenz AG,

7000 Stuttgart-Zuffenhausen

Named as inventor:

Dipl.-Ing. Heinrich Mantel, 7257 Ditzingen

In a further embodiment of the invention is to enable traffic between a the telephone network and a data terminal connected to the telex network in the exchange a special coupling arrangement connecting the two otherwise separate networks is provided, which enables a transition from one network to the other.

The invention will now be explained in more detail with reference to the drawing.

This shows schematically an exchange serving the telephone network and the telegraph network together with a coupling network for each of the two modes of transport.

A telephone subscriber can be connected to another subscriber or a connection line of the telephone network via his subscriber circuit TS and the coupling network consisting of the switching stages A 1 and B 1. The connection setup in the switching network A1 , B1 is controlled by coupling network controls K-St (e.g. markers) assigned to this switching network.
In the same way, a telex (telex) subscriber can be connected to a subscriber line or a connection line of the telex network via the switching network consisting of the switching stages A 2 and B 2. Coupling network controls K-St are also assigned to this coupling network to control the establishment of the connection.

The central organs shown under the dashed line are now used in both types of connection establishment. The organs shown - subscriber identification organ TIn-Id, subscriber class allocator TIn-KZ, election recording organ WA, routing allocator LZO and fee facility Geb-E - are only examples of such

809 63S / 1258

Organs. Depending on the structure of the exchange, other or more such ones are to be used together Organs conceivable (e.g. test facilities, correctors, etc.).

While the connection is being set up, these organs are temporarily in connection with the switching network controls (e.g. the routing allocator) or with the individual connection paths (e.g. the election receiving organ WA) and can be adapted with little extra effort so that they do their job for both of them Networks can meet. If their function is different for the two types of traffic, they can be set accordingly by evaluating the identified participant identity.

Both in the telephone subscriber station shown in the drawing and also in the shown telex subscriber station is shown in each case a data terminal. A connection for data transfer can for example be made so that after making a connection and Transmission of a message that data transmission is to take place to those involved in the connection Subscriber stations switched to the data terminal (possibly automatically). Such a data connection can only be established between subscriber stations that are connected to the connected to the same network.

However, it is also possible to switch to the data terminal before initiating the connection. If a connection is to be established directly from one data terminal to another data terminal, first the switch S is actuated and then the connection setup is initiated. This changeover switch could also be replaced by a device in the manner of the shared changeover switch used in two-way connections, in which case, without prior switching of the telephone or Teletypewriter or the data terminal connected via this device on the same connection line can be put into operation (both incoming and outgoing). It is also conceivable to connect a data terminal to the exchange via its own connection line.

In all of the cases mentioned, the problem arises that one is connected to the one network Data terminal no connection established to a data terminal connected to the other network can be. This means that a subscriber equipped with a data terminal cannot do everyone Reach any other participant provided with a data terminal.

To solve this problem, according to the invention, there is a special switching arrangement in the exchange C provided that fulfills the role of a mixer by providing access from a network to the other network.

If determined by a general identification of the calling subscriber stations becomes that there is a call from a data terminal, according to the invention the first digit is the from calling subscriber dialed digit - or another transmitted before the actual number dialing Signal - evaluated separately in the exchange to determine whether the called Subscriber station is connected to the telephone or telex network. After that - under Consideration of the identity of the calling subscriber station - it is decided whether a transition from one network to the other is necessary and, if necessary, mixer C is in operation must be taken.

Claims (3)

Patent claims: 1. A circuit arrangement for a telephone network and a telegraph network jointly serving, centrally controlled exchange, characterized in that each of the two networks is assigned an individual coupling network {A1, B1 or A2, B 2) with its own coupling network control (K-St) and that the further centralized organs (e.g. Tin-Id, WA, TIn-KZ, Geb-E, LZO) of the switching center which are in temporary information exchange with the individual switching network controls (K-St) and / or the individual connection paths are common to both networks assigned. 2. Circuit arrangement according to claim 1, characterized in that to enable traffic between one connected to the telephone network and one connected to the telex network Data terminal in the exchange a special switching arrangement (C) is provided, which allows a transition from one Network on the other. 3. A circuit arrangement according to claim 2, characterized in that the identification device (TIn-Id) of the exchange generally determines the class of a calling subscriber station (telephone, teleprinter, data terminal) and, when there is a call from a data terminal, puts switching means into operation that evaluate a criterion (e.g. first digit of the dialed number) transmitted by the calling data terminal in front of the signals (dialing information) characterizing the identity of the called data terminal, which indicates whether the called data terminal is to the telephone or the Telegraph network is connected, and that the commissioning of the special coupling stage (C) is dependent on the result of this evaluation and on the identity of the calling data terminal. 1 sheet of drawings 809 638/1258 11.68 © Bundesdruckerei Berlin