DE887830C - Circuit arrangement for telecommunications systems with dialer operation, in particular telephone extension systems with subscribers with different traffic authorization - Google Patents

Description

Circuit arrangement for telecommunications systems with dialer operation, in particular Telephone PBXs with subscribers with different traffic authorizations The invention relates to a circuit arrangement for telecommunications systems Voter operation, in particular telephone branch exchange systems with participants from different parties Traffic authorization.

It represents a particularly simple solution to the task for the extension subscribers Depending on your traffic authorization, the automatic production of the one you have chosen To enable connection or to prevent this establishment. This is because of it achieved that a connection of the selected connection path to the subscriber line according to the traffic authorization, in a central connection device, preferably in the first group selector, arranged auxiliary relay by a short-term Bridging of the speech arteries is influenced by means of the upstream Preselection organ assigned call relay and the isolating relay is effected.

Two exemplary embodiments of the invention are shown in the drawing.

Let us first consider the mode of operation of the arrangement shown in FIG explained.

The participant N is a not authorized participant. The clamps K i, K2 are therefore connected to one another.

If the subscriber lifts his receiver, relay R responds via battery, resistor W i, contact it, subscriber set N, contact 31, relay R, earth. Relay R closes its contacts 6y and ioy. The rotary magnet D of the preselector is therefore repeatedly excited and de-energized via the battery, switch arm d, contacts io y, 8 t, rotary magnet D, breaker RU, earth, so that the switch arms of the preselector are advanced until the voter finds a free group voter Has. At this moment, the relays T and A respond via battery, switch arm d, segment s, contact ior, windings II and I of relay T, switch arm c, resistor W3, contact 23 dk and 2i h, contact ii a, head contact 13 k , Contact 14v, winding III of relay A, earth. Relay T closes its contacts 2 t, q. t, 7 t, g t. By closing the contact gt, the circuit for the rotary magnet D is interrupted, so that the preselector stops on the free group selector. Furthermore, about contact is gt; Segment s and switching arm d short-circuited the high-resistance winding II of the relay T and thus the preselector is blocked against further assignment in a known manner. The speech wires from the preselector to the group selector are switched through by means of the contacts 2 t and 41. Relay A opened contacts ira and 2oa when it responded. With contact ix a the short circuit for relay C is canceled, so that it responds with a delay via battery, switch arm d, segment s, contact gt, winding I of relay T, Schaltarm.c, resistor W3, contact 23 dk and 2i h, relay C, contacts 13k, 14v, winding III of relay A, earth. Relay C closes a hold circuit for itself with contact 12 c via battery, switch arm d, segment s, contact gt, winding I of relay T, switch arm c, resistor W 3, contact 23 dk and 21 h, relay C, contact 12 c, Resistor W4, earth. It opens contacts 15c and 26c and closes contacts 22c and 24c.

Since the circuit for relay R was interrupted when contact qt was closed, but R only drops out after relay T has responded, there is a short bridge between the speech wires via contact 7 t, connection K 2 - K i, contact 6 y, and since, as mentioned, relay C responds with a delay, there is a circuit for relay H via battery, winding II of relay H, contacts 26 c, 16p, switching arm a, contact 6 y, connection Ki - K2, while the bridge is in place, Contact 7 t; Switching arm b, contacts 18 P, 15c, winding I of relay H, earth. Relay H responds, closes a hold circuit for itself via battery, winding III of relay H, contacts 25h, 24c, earth and opens contact 2ih.

If the subscriber who is not authorized to officiate now dials the number, e.g. B. 036, a public exchange participant, which, like the numbers of all other public exchange participants, begins with a zero, the head contact 13 k is opened during the first lifting step of the group selector and the holding circuit for relay A is interrupted. As soon as the group selector has reached the decade corresponding to the number zero, the decade contact 23 dk is opened. This triggers the occupied preselection and the group selector. This prevents the unauthorized subscriber from receiving an exchange connection.

If, on the other hand, subscriber N who is not authorized to operate, dials the number Another extension participant who is not like that of the outside line for example begins with the digit zero, the group selector is not activated when the current is impulsed controlled to the decade of office corresponding to zero. Therefore the sent ones get there Number current surges over earth, contacts 22 c, 2o a, a wire to the downstream voter. The further establishment of the connection is carried out as known, although that is not shown Test relay P of the group selector responds and the speech wires by closing the Contacts 17 p and ig p switched through to the subordinate voter.

It is now assumed that the subscriber N is an authorized subscriber may be. In this case, the terminals Ni, K2 are not connected to one another.

If the subscriber lifts his handset, the group dialer is seized as described above, however, in the short time in which the contacts 6 r and 7t are closed at the same time, there is no bridging of the speech wires, since none between the terminals K i, K2 Connection exists. Relay H is therefore not energized because it does not respond via the subscriber loop.

If the authorized subscriber dials a subscriber's number, as soon as the first digit of this number has been sent, the group voter will has reached its decade of office, the decade contact 23dk opens, but the Connection not released because contact 2i / b is closed. By dialing the number generated current surges therefore reach the downstream via earth, contacts 22c, 2o a Dialer, and the desired connection is made.

If the authorized subscriber N dials the number of an extension subscriber, the relay H cannot respond after the group selector has been assigned, since there is no connection between Ki, K2. Contact 21h is therefore permanently closed, and the current surges are transmitted to the downstream voter via earth, contacts 22c, 2o a, a wire, so that the subscriber N receives the desired connection.

Let us now consider the mode of operation of the exemplary embodiment shown in FIG described.

The subscriber N is a not authorized extension subscriber. The terminals Ki, K2 are therefore not connected to one another. If the subscriber lifts his receiver, the group selector is seized, as explained above, but when relay A responds via winding III, contact 25 a is closed and, since relay C responds with a delay, relay H is energized via the battery, Winding II of relay A, contacts 24c, 25a; Winding I of relay H, winding I of relay A, earth. Relay H closes a hold circuit for itself via battery, winding II of relay H, contacts 26 h, 27 c, earth and opens contact 2ih.

If the subscriber who is not authorized to act now dials the call number of a subscriber, then again, as described above with reference to FIG the decade of office reached, the decade contact 23 dk and thus the selection and the group voter were triggered.

If the subscriber who is not authorized to officiate selects another extension subscriber, relay H speaks, as just explained, via its winding I and the two windings I and II of relay A, binds itself via its winding II and opens contact 2ih, but the switching arms are switched off of the group dialer is not controlled to the external decade, since the extension subscribers' numbers do not contain the digit corresponding to the external decade. Contact 23 dk thus remains permanently closed, and the number current impulse is given via earth, contacts 22c, 2o a, a-wire to the downstream voter. The desired connection is therefore established, with the test relay P (not shown) of the group selector responding in a known manner and switching the speech wires through by closing the contacts 17P and igp.

It is now assumed that the subscriber N is an authorized subscriber may be. In this case, the terminals K i, K2 are connected to one another.

If the authorized extension subscriber dials the telephone number of an exchange subscriber, there is temporarily a circuit for winding I of relay H via contacts 2, 4e and 25a, but this relay cannot respond because this winding I is short-circuited via contact 7t, connection K: z - K i, contact 6r, switch arm a, contacts 16 P, 24 c, 25 a, winding I of relay H, contact i8p, switch arm b. The purple contact therefore remains permanently closed. The desired connection to the subscriber is established.

If the extension subscriber with authority to office dials the number of another extension subscriber, the two contacts 21 h and 23 dk remain closed, since not only, as just explained, the response of relay H is prevented, but also the switching arms of the group selector according to the number of the desired extension subscriber not be lifted to the decade of office. The transmission of the current surges by means of the contact 2o a is therefore unhindered and thus the connection to the selected participant is also established.

The release of the connections after the end of the conversation goes into in all of the above cases as is known and is therefore not shown or described.

Claims (3)

PATENT CLAIMS: i. Circuit arrangement for telecommunication systems with dialer operation, in particular telephone extension systems with subscribers with different traffic authorizations, characterized in that the connection of the selected connection path is activated controlling the subscriber line according to the traffic authorization, in one central connection device, preferably in the first group selector, arranged Auxiliary relay (H) is influenced by briefly bridging the speech wires, the call relay (R) and the des Isolation relay (T) is effected. 2. Circuit arrangement according to claim i, characterized in that that the auxiliary relay (H) is triggered by a short-term bridging of the speech wires caused current amplification is excited and when selecting an impermissible connection on the part of the subscriber, the further establishment of the connection, preferably by disconnecting the test wire prevents (Fig. i). 3. Circuit arrangement according to claim i, characterized characterized in that the auxiliary relay (H) by briefly bridging the speech wires is short-circuited and thereby the further establishment of the desired connection allows (Fig. 2).