DE3037363C2 - Circuit arrangement for telephone systems, in particular private special telephone systems, with freely selectable connecting line priority - Google Patents

Description

55

The invention relates to a circuit arrangement for telephone systems, in particular private special telephone systems, with several differently authorized subscriber stations and with changes to authorizations for certain connection lines controlling, assigned to a centralized or decentralized controller Switching means.

Telephone systems defined in this way are often provided for private special telephone networks which the connected subscriber facilities in addition to their. Function aie in incoming and outgoing traffic direction driven telephone equipment additional switching tasks have to meet. The subscriber facilities can for example be maintenance stations of energy supply companies or also placement and workplaces for air traffic control systems. Depending on the structure and requirements of a telephone system can affect both the individual subscriber facilities between one another and the connecting lines that can be connected by the subscriber devices are different Have permissions. Are known inter alia. Systems in which these authorizations - whether line and / or operator station-related - can be changed by manually controllable switching devices. the Determination and evaluation of the authorized persons among each other takes place either by means of centrally running Search and identification processes with subsequent authorization evaluation or through decentralized processes Shifting operations, such as determining the ranks using the known derailleur gears.

The object on which the invention is based consists of all of these line and / or operator station related Changes to authorizations regardless of the control concept and in one of the effort to realize her little costly way and in particular the universality of this switching and To ensure control operations.

According to the invention this is achieved in that certain or all subscriber stations several Identifying means controlling different priorities of the connecting lines are assigned and the central or decentralized control, upon actuation of one of the freely selectable actuatable marking means, generates a marking signal as a function of the existing one Operating status, the priority assigned to the identification means in one of the central or decentralized control transfers working memory assigned and that the central?.! e or decentralized Control prepares the issuing of a priority command corresponding to the respective switching state.

With the assignment of several different priorities for each of the subscriber stations connectable connecting lines and their control by freely selectable identification means achieves that the subscriber stations, depending on the operational requirements, the priority of the connection lines can control manually. The use is essential to the invention in this context of a working memory to see in which the priority of the connected stations desired by the subscriber stations Connecting lines is transmitted and if desired by the decentralized or centralized control can be converted into a corresponding priority command.

According to an advantageous embodiment of the invention it is provided that the priority command is used to assign a preferred connection line can. With this switching measure it is possible to use certain connecting lines that normally can be occupied by several subscriber stations with the same priority, by a short-term for higher-level tasks to reserve certain participant positions, and against the occupancy by the Block subscriber stations with low priority.

Another advantageous embodiment of the invention provides that with the priority command at Allocation of all connecting lines in the selected direction to an existing connecting line

lower priority and the relevant Connection line with the subscriber station determining the priority command of higher priority connected. Such a preference for a few subscriber stations or a single subscriber station allows, for example, the automatic in emergency situations Activation of connection lines, which are used by subscriber facilities with low-order connection line purity were occupied. This preference ensures that the appropriate Subscriber station an absolute priority over all other subscriber stations in this regard can assume that the occupancy of the connecting lines canceled and by a kind of forced disconnection are available to the higher-level subscriber station.

A further advantageous embodiment of the invention provides that if one does not reach through Priority command to seize a connection line when all connection lines are occupied Direction as a result of the same priority marking by actuating one of the marking means higher priority an occupancy of a connection line in the selected direction is enforced. The to Higher-level tasks can therefore also be given priority when all of the participants are occupied Connecting lines in one direction by activating the identification means of the higher one Priority necessarily lead to an assignment of the desired connection line.

Another advantageous embodiment of the invention is achieved in that the central or decentralized control switching means are assigned which are highest when the marking signal is issued once Priority is the activation of an equivalent marking signal until one is released by the connection line occupied by the highest priority, and thus there is no possibility of using two participant positions with equal rights in themselves, change of priority to be able to do in an untargeted manner.

The invention is explained in more detail in an exemplary embodiment shown in the figures, with only the Switching devices necessary for understanding the invention are shown.

In the exemplary embodiment, the structure is a centrally controlled telephone system shown, but what the invention is by no means limited.

The centrally controlled telephone system has the subscriber stations TS 1, 7 SN with the corresponding identification means KM 11 to KMWX and KMN 1 to KMNY , the subscriber units 751, TSN with the connection line connection units LTU and the group coupling stages GSN within the connection line connection group LTG via unmarked connection lines with the time step units TSU and the associated group coupling controls GSC of the central coupling stage CSN can be connected. Both the group control GC and the group coupling control GSC are, like all central control devices (not shown), connected to the central control CC, which also contains the main memory MU

The change in priority of a connection line by the subscriber stations TSl, TSN takes place in such a way that, after the desired connection lines have been switched on, an identifier KMW to KMX X or KMN \ to KMiY , whose information is freely selectable by the operator of the subscriber stations TSi, TSN, is actuated is written into the main memory MU of the central control CC . In the event that the desired connection line was already occupied by another subscriber station TSi, TSN, the corresponding subscriber station TS . or TSN change the connection line priority in the main memory MU by pressing a higher-quality Kennzefrhnüngsmiiiels KM 11 to KMiX or KMNi to KMNY so that the preferred connection line assignment can be controlled by the central controller CC.

With the priority information per connection line stored for each subscriber station 751, 75A / within the main memory MU, it is sufficient that, with the help of the central control CC, the priority command can be used to initiate the most varied of switching processes within the telephone system, depending on the respective operating state of the telephone system. For example, an occupied-marked connection line can be forcibly released by suitable known switching measures of the central controller CC and connected to the subscriber station 751 or TSN initiating this switching measure. In the case of several connecting lines in a desired direction, which also cannot be reached because other subscriber stations have already occupied them, the higher-order priority command can also be used to force the connecting line to be occupied.

If the marking signals of the highest priority are transferred from more than one subscriber station 751 or 75 / V to the main memory MU , the priority identifier of the last subscriber station 751 or TSN is not effective, so that incorrect switching of several subscriber stations 75 t, TSN with equal priority is excluded are. The change in priority can then only be controlled again after the connection lines occupied by di <: h '/ ciiste priority have been released.

1 sheet of drawings

Claims (5)

Patent claims: 1. Circuit arrangement for telephone systems, especially private special telephone systems, with several differently authorized subscriber stations and with authorization changes for certain connecting lines controlling, a central or decentralized control associated switching means, characterized in that certain or all Teflnehmerstellen (TSi to TSN) several different priorities of the Identification means (KMXX to KMXX; KMNX to KMNY) are assigned to control connecting lines and the central or decentralized control (CQJ when one of the freely selectable activatable identification means (KM ...) is activated, a marking signal depending on the existing operating status of the identification means (KM .. .) ^ superior priority in a main memory (MU ) assigned to the central or decentralized control (CC) and that the central or decentralized control (CC) issues a priority corresponding to the respective switching state ätsbefehl prepared 2. Circuit arrangement according to claim 1, characterized in that with the priority command a preferred connection line assignment takes place 3. Circuit arrangement according to claim 1 or 2, characterized in that an existing connection line with lower priority is interrupted with the priority command when all connection lines of the selected direction are occupied and the connection line in question with the subscriber station determining the priority command of higher value (TS \ or TSN ) is connected. 4. Circuit arrangement according to one of claims 1 to 3, characterized in that if a priority command to occupy a connection line is not implemented, all connection lines in one direction are occupied as a result of the same priority markings by actuating one of the identification means (KM ... ) Higher priority an occupancy of a connection line of the chosen direction is enforced. « 5. Circuit arrangement according to one of claims 1 to 4, characterized in that the central or decentralized controller (CC) are assigned switching means which, when the marking signal of the highest priority is issued once, the activation of an equivalent marking signal up to the Freiv / earth one through the Prevent the connection line that is occupied with the highest priority.