DE893517C - Circuit arrangement for the assignment of codes to different groups in telecommunications systems - Google Patents

Description

Circuit arrangement for the assignment of key figures to various Groups in telecommunications systems In telecommunications, in particular telephone systems are Circuit arrangements for the assignment of key figures to different ones equivalent groups (zones or directions) known. To those in a group table To be able to technically evaluate the defined assignment of the key figures was previously Stepping devices, for example rotary selectors, are used. These result Quite apart from the high wear on the contacts, longer setting times, and- because of their rigidity with regard to grouping options, several Such switching means can be provided for a specific grouping device.

The invention relates to an arrangement for grouping key figures according to the coordinate principle. Such an arrangement can reduce the complexity of switching means adapted to the respective necessary needs and thereby. Savings on switchgear achieved weirdein.

In the case of the direction preselection method, 2o opo, for example, are possible A maximum of 177 key figures are evaluated in 27 direction groups. Of those are closed the end offices of your own node office leading nine four-digit codes, the nine three-digit key figures and the to define nine two-digit key figures leading to its own central office area.

According to the invention, the group assignment is achieved in that each Place an index number according to its value on one of the z. B. ten each Its associated market derivation has an alternating potential for each subsequent position applies and the marking lines in each case two consecutive: the places by switching means are nibbled on in terms of coordinates in such a way that certain Switching means become effective through potential differences and an assignment to groups by combining the contacts of all appealing switching elements.

In order to achieve the mentioned: adaptation and saving of switching means, is a multiple meshing of two successive bundles of marking cables made in such a way that the same group affiliation is made with different codes Same: Switching means become effective as far as the grouping plan allows. the in this arrangement upwelling circuits undesirable potential differences are by blocking switching means (rectifiers) in series with the respective SchaltImi.tteln are avoided. In the case of uneven-digit codes, the marking lines are -the last digit connected to each other via the locking and switching means and this Connection point to different potentials compared to the marker lines placed.

The invention is illustrated in the basic circuit diagram using three examples explained in more detail.

i. By choosing a two-digit code, e.g. B. 2o, is through the Number 2 of the contract a2 and by the number o of the contacts bio gechlossien, whereby Negative potential on the marking line MLa2 and positive potential on the marking line MLbio is placed. In the connection between these two marking lines speaks Relay R I (V via the rectifier G14 and closes its contact ¢ I. Thus group D assigned to this number is applied to positive potential.

If you choose a four-digit code, the grouping takes place analogous to the Bemspiel described, whereby the four code numbers correspond to the marking lines MLa, MLb, MLc and MLd are assigned.

z. When choosing a three-digit code, e.g. B. i2i, are through Connect the contacts ai, b2 and c1, the marking lines MLai and MLci to negative potential and the marking line MLb. placed on plus potential. In the connection of the two The relay speaks to the first switched marking lines, RI via the rectifier GIi at. That speaks in the connection of the last switched marking lines Relay HI via the rectifier GL on. In the connection of the last switched If the marking lines to earth are connected, relay R IV is energized. By addressing this both relays is activated by the combination of their contacts rI and 61 the Group D placed on positive pobentiial.

3 .. With the successive selection of two key figures belonging to a group, e.g. B. 31 and 32, is analogous to that in i. described example in both cases the same relay @ .R III energized. By "closing the contact 3I, the code numbers 31 and 32 are assigned to the group F."

In addition to the desired circuit via relay R III, the following reverse current circuit would be possible without the use of the rectifier: ' In this case, the codes 31 and 32 would also be assigned to group D.

Lead the use, for example, of rectifiers in series with The circuit is decoupled from each of the relays. The unwanted circuit is thus by the rectifier Eq. locked, so that the relays R I, R II and R IV cannot address.

Claims (3)

PATENT CLAIMS: i. Circuit arrangement in telecommunications in particular Telephone systems for assigning codes to specific groups, e.g. B. Zones or directions, characterized in that each digit corresponds to an identification number their value on one of the z. B. ten Mgrkierlinien each assigned to it an alternating potential for each subsequent point applies and the marking lines in each case two successive positions by switching means (relays, in particular Small relays) are meshed according to coordinates in such a way that according to the code number - Certain switching means become effective through Potentlihldiffereinzen and an assignment made into groups by combining the contacts of all responding switching means will. 2. Circuit arrangement according to claim i, characterized gekennzeiehneb; that a multiple Meshing of two bundles of marking cables is carried out in such a way that, when different key figures belonging to the same group, the same switching means are effective as far as the grouping plan allows. 3. Circuit arrangement according to claim 2 "characterized in that the undesired Potential differences can be avoided by blocking switching means (rectifier). q .. Circuit arrangement according to claims i and i to 3, characterized in that at the marking lines for the last odd digit, are assigned, are connected to each other via the locking and switching means and this connection point has a different potential compared to the marking lines owns.