DE2816898A1 - Centrally controlled automatic telephone exchange - has priority evaluating device with connection blocking switches to which control potentials are applied - Google Patents

Abstract

Line bunches are divided in accordance with the subscriber priority criteria. The telephone exchange has an identification device, a priority evaluating device and a store for routing codes. The priority evaluating device (BAW) has at least two groups of switches (1A, 2A..., 1C, 2C...) blocking connection build-up, each with inputs (a11, a21... c12, c22...) and output (a12, a22 ... c12, c22...). Directionally oriented control potentials are applied to the inputs of both groups of blocking switches, routing code oriented control potentials are applied to the outputs of the first group of switches, and both control potentials are applied to the outputs of the second group switches.

Description

Circuit arrangement for telephone, especially loading

operator telephone systems, for the blocking of automatically producible Connection through-circuits The invention relates to a circuit arrangement for Centrally controlled telecommunications, in particular company telephone systems, with automatically controllable connection through-connections, with different subscriber categories Authorization criteria with subdivided trunk groups and with an identification device, an authorization evaluator and a key figure memory.

In telephone systems defined in this way, prior to the connection through-circuits the subscriber stations causing such measures are checked to determine whether they are entitled to set up such calls. One distinguishes in the telecommunications systems, for example, between officially authorized and semi-officially authorized persons and non-official categories.

Subscribers with outside authorization can make both outside calls build up as well as can be called directly by public authorities in the incoming traffic direction. While semi-authorized participants only in the incoming traffic direction with the Office participants can be connected (simple blocking), but not authorized officers Participants are not connected to the exchange line participants either inbound or outbound (double-sided blocking). There are similar differentiation criteria for the so-called Remote authorizations that relate to call connections in which the connections go beyond a certain local area (long-distance dialing).

Due to special characteristics of company telephone systems, for example, through the possibility of intruding on existing call connections Additional eligibility criteria result for the individual participants, which are specified in checked in the same way for their presence before the connection through-connections Need to become.

For all of these different eligibility criteria it is known Provide each so-called authorization plates on which - for example in the form of a printed circuit - lines are located that are similar to those of one Coordinate field are arranged. Thereby the lines of one input level, for example, the hundred mark assigned to the individual participants, while the lines of the other input level, which have a contact combination can be controlled from ten and one contact markings of the participants, either represent the positive or negative statement of justification. The galvanic The crossing lines are connected either via jumper diodes or produced by means of cable bridges.

For the individual eligibility criteria, e.g. B. semi-official or not Authorized participants are therefore separate routings on different authorization plates intended.

It is also known due to the different traffic flows these authorization checks for outgoing and incoming connection traffic to be carried out in various central control facilities.

This is how, for example, the authority to act and thus also the statement about the non-exchange authorization for incoming official traffic in a dial code converter determined on the basis of the selected company telephone subscriber number, while at outgoing exchange traffic after the selected exchange code a subscriber line identification takes place and the authorization check by the so-called authorization evaluator is made.

These tax processes, which run differently, are due to the audit several different authorizations for connection traffic in incoming and outgoing direction associated with considerable expenditure on equipment and require in addition, extensive shunting work.

In addition to the direction-dependent traffic restrictions are, in particular in larger line networks with a large number of company telephone systems to be interconnected There are other traffic restrictions to consider. In these pipeline networks namely, the various company telephones can not only have one single connection path - the shortest between two systems - can be connected, but so-called detour connections can also be made len. These detour connections between the original system and the target system lead over one or more other company telephone systems. Since these connections are both with regard to the additional line assignments as well as with regard to the Loads on the company telephone systems involved are very expensive only a certain group of participants is authorized within a company telephone system be to use such communication routes. It also makes sense also the number of authorized participants with the length of the detour (second-third way etc.) in order not to reduce the entire network of lines through a few calls to load very heavily.

The object on which the invention is based consists in checking of traffic restrictions depending on more than two conditions for connection to enable line connections and thereby the expenditure on equipment and the To keep control processes for the individual locking checks as low as possible.

This is achieved according to the invention in that the authorization evaluator blocking switching means preventing at least two groups of connection through-connections each having an input and an output that to the first group the locking switching means associated inputs and the second group of the Blocking switching means assigned inputs direction-oriented control potentials and to the outputs assigned to the first group of locking switching means as well as to the directional outputs assigned to the second group of blocking switching means and key figure-oriented tax potentials can be switched on.

With the provision of two types of interlocking switching means linked in this way has achieved that the right service-oriented bundle of cables under Inclusion of the selected key figure can be blocked against each other in a simple manner can. This means, for example, that an incoming trunk group is busy 1 when dialing the code 1 against an outgoing line bundle 2 with help can be blocked by three control lines and two blocking switching means. Furthermore This is the name given to this type of variable blocking option for trunk groups as a function of of the selected key figure also as a regulated routing.

It is essential to the invention that the blocking options not only on one-sided blockings - an incoming trunk group is merely blocked against an outgoing trunk group with a certain code - restrict, but that by appropriately connecting further blocking switching means with the same Circuit arrangement can also be implemented a double-sided blocking. Based In the above example, this means that the incoming trunk group is also busy 2 not connected to the outgoing line bundle 1 when dialing code 1 will.

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

In the bundle identifier BID there are in each case certain authorization criteria combined line bundles the direction-oriented identification contacts lbk, 2bk for the incoming trunk group and Rbg, 2bg for the outgoing occupied trunk group provided. The authorization evaluators are also BAW and the code memory SKZ shown, which with the bundle identifier BID over a variety of control lines are connected. The authorization evaluator BAW includes the lock switch means 1A, 2G, 3A and 1C, 2C, which have their respective Switching points a1, a12; a21, a22; a31, a32; cii, ci2; c21, c22 with the trunk groups assigned routing points 1K, 2K for the incoming line bundle and IG, 2G for the outgoing occupied cable bundle by means of a jumper wiring are connected. Furthermore, the blocking output SP is in the authorization evaluator BAW intended for connection traffic. If necessary, the blocking criterion will be the not shown central control unit transmitted, which then also in prevents the connection through-connection in a manner not shown.

The following is the function and mode of operation of this circuit arrangement using the routed blocking switching means 2A, 3A and tC and 2C both for the simple as explained for the double-blocked connection traffic.

First of all, it is assumed that in the simply blocked connection traffic a transmission that is assigned to trunk group 1 is busy arriving and on the basis of the available target information - the code 1 is selected - with to be connected to a subscriber who is using the outgoing trunk group 2 can be reached. The trunk groups 1 and 2 should however be used in this traffic direction must be blocked in connection with the selected code number 1.

In the selected example, the bundle identifier BID is the incoming trunk group 1 through Actuation of the identification contact ibk and the outgoing busy trunk group 2 by pressing the identification contact 2bg marked, while the corresponding code number contact is from the code memory SKZ 7kz is closed. About the actuated identification contact lbk and the same time closed code number contact lkz then a circuit is closed at which the blocking switching means 2A is switched on via the connections a21 and a22. Via the switching contact 2a1 of the blocking switching means 2 &, which is thus actuated, is also Switching potential applied to the connection c12 of the switching means 1C, whereupon this too Blocking switching means 1C via the already actuated identification contact 2bg of the bundle identifier BID and the unmarked jumper line between the connection point 2G and the terminal cii is excited. The thereby actuated switching contact ic of the blocking switching means 1C applies the blocking potential to the starting point SP and thus does not signal this illustrated central control unit that this connection between the Leltungsbündeln 1 and 2 may not be switched through with the selected code number 1.

In the case of double-blocked connection traffic - based on the above-described Example - the trunk group 2 in the incoming traffic direction against the trunk group 1 to be blocked in the outgoing traffic direction with the selected code number 1. In the authorization evalu ter BAW are the switching points 2K with a31, a32 with 1KZ and IG with c21 and Connect c22 to a3 using patch cords. In a similar way as already described, When the identification contact is activated, it becomes 2bk and the identification number contact is activated lkz the locking switch means 3A energized, which is also actuated in conjunction with the Identifying contact lbg of the bundle identifier BID and the also actuated Switching contact 3a1 des Lock switch means 3A the lock switch means 2C switched on. About the actuated switch contact 2c is in the same way as already described for the simple blocking, blocking potential at point SP des Authorization evaluator EQW is switched on and thus also the connection throughput between the incoming trunk group 2 and the outgoing trunk group 1 blocked for the selected code 1.

1 Figure 3 claims

Claims (3)

Claims 1. Circuit arrangement for centrally controlled telecommunication, in particular company telephone systems with automatically controllable connection circuits, with subdivided into different eligibility criteria by participant categories Line bundles as well as with an identification device, an authorization evaluator and a code memory, d u r c h g e n n n -z e i c h n e t that the Authorization evaluators (BAW) at least two groups of connection through-connections preventing blocking switching means (1A, 2A, 3A ... and 1C, 2C ...) each with one Input (all a21, a31 ... and coli, c12 ...) and one output (a12, a22, a32 ... and c12, c22 ...) that the first group of the blocking switching means (1A, 2A, 3A ...) assigned to inputs (a11, a21, a31 ...) as well as to those of the second group the blocking switching means (7C, 2C ...) assigned inputs (c11, c12 ...) direction-oriented Control potentials and to those of the first group of blocking switching means (1A, 2k, ...) assigned outputs (a12, a22, a32 ...) key figure-oriented as well as those of the second Group of locking switch means (1C, 2C ...) assigned outputs (cl2, c22 ...) directional and key figure-oriented tax potentials can be switched on. 2. Circuit arrangement according to claim 1, d a d u r c h g e k e n n notices that with identification contacts (1bk, 2bk ... 1bg, 2bg ...) the Identification device (BID) and with code contacts (1kw, 2kz ...) of the code memory (SKZ) the direction-oriented and the indicator-oriented tax potentials can be switched on are. 3. Circuit arrangement according to claim 1, d a d u r c h g e k e n n indicates that a contact (lc or 2c ...) of the second type of blocking switching means (1C or 2C ...) controls the prevention of the connection through-connections.