DE3037365A1 - Private telephone system - has priority and group facilities allowing change of priority through local instrument addressing central control memory - Google Patents

Abstract

The system is used to increase the versatility of priority call selection and group connections. The former can be particularly useful if the telephone system is also used for emergency communications, for e.g in process or power plants. Certain, or, if necessary, all instruments (TS1,TSN) on the system are provided with controls for selecting a range of priorities (KN11....KM1X;KMN1...KMNY). A call and associated selected priority is put into a working store (MU) in the central processor (CC) where it is checked. If the priority has changed then the store is updated. If the called extension is engaged then by exercising a higher priority the existing call can be interrupted. Also priorities can be established even if the system is already fully occupied at the moment at which a new priority call is entered. As a precaution against conflicting instructions, only one extension can exercise top priority at any one time.

Description

Circuit arrangement for telephone systems, in particular

private special telephone systems, with freely selectable changes to authorizations The invention relates to a circuit arrangement for telephone systems, in particular private special telephone systems with several differently authorized subscriber stations and with an authorization change for certain connections enabling central or decentralized control associated switching means and with a Authorization comparison of the calling, called and / or the one already existing further involved with the calling, called subscriber station Switching means enabling subscriber station.

Telephone systems defined in this way are often used for private special telephone networks provided in which the connected subscriber facilities in addition to their function than telephone equipment operated in the incoming and outgoing traffic direction must also perform switching tasks. The participating institutions can for example or also maintenance stations of energy supply companies of placement and workplaces for air traffic control systems.

Depending on the structure and requirements of a telephone system both the individual subscriber facilities among themselves and those of the subscriber facilities connectable connecting lines different authorizations exhibit. In any case the participant authorizations and the connection line authorizations compared with each other and in a selection process either the connection of the connection line to the subscriber facility is permitted or blocked. When connecting several subscriber facilities with one another, in the case of so-called conference calls, these selections are more similar Manner is required, however, both the authorization of those who are already on the conference call involved as well as the connection line authorization with the authorization of the to compare newly connected subscriber equipment. For certain operating cases, For example, in emergency situations, it is known to have authorization restrictions either to be canceled in general or to be changed function-related to the effect that connections that are normally not allowed are allowed.

The object on which the invention is based is on the one hand to increase the possibility of varying authorizations of all kinds and on the other hand, the changes in authorizations by the operators of the Participant facilities individually to the most varied of operational situations to be able to customize. According to the invention, this is achieved in that certain or several different priorities assigned to all subscriber stations are assigned and the central resp.

decentralized control when one of the freely selectable actuators is actuated Identification means after being set up in vain for the calling subscriber station Connection a marking signal depending on the existing operating status the means of identification assigned priority in one of the central or decentralized control containing working memory transfers and depending on the comparison of all or part of the priority of those involved Subscriber stations by the subscriber station calling in vain by means of free Choice, the priority in the main memory can be deleted and a higher priority can be registered is.

As essential for the invention is to be seen that after one of a subscriber station in vain to be established connection by the subscriber stations assigned marking means a marking signal in the assigned to the control RAM can be carried over, depending on the comparison of all or part of the priority of the participating stations by the in vain calling subscriber station the priority in the main memory by means of free choice can be changed. It thus becomes a correspondingly proceeding subscriber station possible, inter alia to existing conference connections by choosing the higher Priority.

According to an advantageous embodiment of the invention, it is ensured that in the presence of the highest priority for more than one subscriber station the priority in the main memory cannot be changed for the participating stations are. This ensures that not two subscriber stations with mutually influence existing calls with the highest priority can.

According to a further advantageous embodiment of the invention are in the main memory for the comparison state of registered priorities of the subscriber stations can be fed to a data memory and thus, for example, to Control purposes, available at any time.

Another advantageous embodiment of the invention is thereby realized that the result of the data memory via a registration device can be printed out and is therefore available at any time as a control document.

The invention is shown in a figuratively illustrated embodiment explained in more detail by only the switching devices necessary for understanding the invention are shown.

In the exemplary embodiment, the structure is a centrally controlled telephone system shown, to which, however, the invention is in no way limited.

The centrally controlled telephone system assigns the subscriber stations TS1, TSN with the corresponding identification means KM11 to KM1X and KMN1 to'KM on, the subscriber stations TS1, TSN with the trunk connection units LTU and the group switching stages GSN within the trunk line trunk group LTG via unmarked connecting lines with the time step units TSU and the associated group coupling controls GSC of the central coupling stage CSN can be connected are. Both the group control GC and the group coupling control GSC are like all central control devices, not shown, with the central control CC connected, which also contains the main memory MU.

The change in priority of a connection line by the subscriber stations TS1, TSN takes place in such a way, that after turning on the desired Connection lines additionally one from the operator of the subscriber stations TS1, TSN freely selectable identification means KM11 to KM1X or KMN1 to KM1Y activated whose information is written into the main memory MU of the central controller CC will. In the event that the desired connection line is already through another Subscriber station TS1, TSN was busy, the corresponding subscriber station TS1 or TSN by pressing a higher-quality marker KM11 to KMlX or KMN1 to KMNY the connection line priority in the main memory MU to that effect change that the preferred connection line assignment from the central controller CC can be controlled.

With the for each subscriber station TS1, TSN within the main memory MU stored priority information per connection line is achieved that with the help of the central control CC depending on the respective operating status the telephone system of the priority order to initiate the most varied Switching processes within the telephone system can be exploited. For example an occupied-marked connection line by suitable known switching measures the central control nC forcibly enabled and with this switching measure initiating subscriber station TS1 or TSN are connected. If there are several connecting lines a desired direction, which therefore also cannot be reached, since other participant positions have already taken this, you can use the higher-quality Priority command, the occupancy of the connection line can also be forced.

If more than one subscriber station TS1 or

TSiQ sends the marking signals of the highest priority to the main memory MU transmitted, then the priority identifier of the last active subscriber station TS1 or TSN is not effective, so that incorrect switching of inherently equal priority several subscriber stations TS1, TSN are excluded. The priority change can then only be used again after the connection lines occupied by the highest priority have become free controlled again.

5 claims 1 figure

Claims (5)

Claims 1. Circuit arrangement for telephone systems, in particular private telephone systems with several differently authorized subscriber stations and with an authorization change for certain connections enabling central or decentralized control associated switching means and with a Authorization comparison of the calling, called and / or the one already existing others involved with the calling, called subscriber station Switching means enabling subscriber station, d a d u r c h e k e n n z e i c h -n e t that certain or all subscriber stations (TS1, TSN) have several different ones Identification means assigned to priorities (KM11 to KM1X; KMN1 to KMNY) and the central or decentralized control (CC) can be freely selected when one of the actuatable marking means (KM) after in vain to the calling subscriber station (TS1 to TSB) established connection a marking signal depending on the existing one Operating state, the priority assigned to the marking means KM) in one the main memory (MU) contained in the central or decentralized control (CC) and depending on the comparison of all or part of the priority of those involved Subscriber stations (TS12 TSN) by the subscriber station (TS1 or TSN) the priority in the main memory (MU) can be deleted and a higher priority can be registered. 2. Circuit arrangement according to claim 1, d a d u r c h g e k e n n notices that with the change of priority in the main memory (MU) a new comparison of the priority of the participating subscriber stations (TS1, TSN) takes place. 3. Circuit arrangement according to claims 1 and 2, d a d u r c h It is not noted that when there is a highest priority for more than one subscriber station (TS1, TSN) the priority in the main memory (MU) cannot be changed for the participating stations (TS1, TSN). 4. Circuit arrangement according to one of claims 1 to 3, d a d u r c h g e k e n n n e i c h n e t that the in the main memory (MU) in the comparison state registered priorities of the subscriber stations (TS1, TSN) can be fed to a data memory are. 5. Circuit arrangement according to claim 4, d a d u r c h g e k e n n z e i c h n e t that the result of the data memory via a registration device is printable.