DE916651C - Circuit arrangement for monitoring the impulses in telecommunication systems with dialer operation, in particular telephone systems - Google Patents

Description

(WiGBl. P. 175)

FEDERAL REPUBLIC OF GERMANY

ISSUED AUGUST 16, 1954

GERMAN PATENT OFFICE

PATENT LETTERING

CLASS 21a ³ GROUP 36io

D 10966 VIIIa 121 a ³

LIBRARY OF THE GERMAN PATENT OFFICE

Willy Seidel, Berlin-Reinickendorf

has been named as the inventor

Telephone systems

The main patent started on June 19, 1951

Patent application published December 17, 1953

Patent issued July 8, 1954

The main patent relates to a circuit arrangement in telecommunications systems with voter operation, in particular telephone systems, for prevention the establishment of connections in certain directions or to certain connections, whereby the Nutnmernimpulsgabe Mediating or monitoring switching device after recording the decisive for the blocking Number burst series by generating a criterion and passing it on to the connection path the setting of a building the connection path! Number surge receiver in the direction of the connection path to be blocked.

The arrangement shown in the main patent may be flawless Setting of trunk entries according to the number current impulse which is subject to surveillance ' questioned, especially when, in which the monitoring executing switching element several locked positions in a row are arranged. and. behind these positions! only the one marked by the number current impulse Position 'lies. It may then, the case

occur that a connection that is permissible in and of itself cannot be established.

The purpose of the present invention is to remedy this deficiency. Sifö orders that one causing the connection to be blocked Relay is connected in such a circuit in the monitoring circuit that it is at Connection of blocking potential according to the number sequence that is decisive for blocking ίο only takes effect if: it is through the surge receiving relay is brought into a state that enables it to be addressed.

The drawing shows an exemplary embodiment of the subject matter of the invention relating to a private branch exchange. The main ones are shown. Parts of a monitoring device that is assigned to an American transmission. The monitoring device is therefore at: a point over which the first series of numbered bursts sent out for the setting of official devices runs. In the upper part of the drawing, the trunk line AL is shown with the two speech cores α and b . The main component of the monitoring device is a follower, which is set with its switching arms d 1 to ei4 by the magnet DM .

When the monitoring device is assigned, the relay / is excited via wire bi: earth, wire bi, contact 25 w, winding / of the relay /, minus. After contact 9 i opens, relay H responds: earth, wire bh, contact 6 w, winding of relay H, minus. The impulses of the first exchange code sent by the calling extension subscriber are transmitted to the relay / monitoring device via the exchange line AL. The latter happens indirectly, ie with the impulse relay / de-energizes, in the impulse pause it picks up. After its first drop, relay V responds: earth, contacts 13 h, i6i, windings II and I of relay V, minus ·. Its winding II is short-circuited via the contacts 15 / 2- and 14.V , so that the relay is held in the working position due to the delayed drop during the individual series of current impulses. The current surges reach the rotating magnet of the follower: earth, contacts 28 i, 29fe, 31 /, magnet DM, minus. The switching arms of the follower are adjusted according to the recorded number stream series.

If a code number is sent first that is not a blocking number or is not the first digit of a blocking number, for example the number 5, the connection can be set up unhindered. Any other number than the first digit is then not picked up by the follower, because it is via the arm. dz of the follower in such connections a continuous current circuit for the winding II of the relay. / closed! is: Minus, winding II of the relay /, contacts 23 h, 22V (relay V had dropped out after the end of the series of impulses and prolonged opening of contact i6i), switching arm d 2 in position 5 (corresponding to code number 5), earth. No switching processes are triggered via switching arms dl and d $ of the follower, since both switching arms are on idle contacts. As mentioned, the other series of numbered bursts transmitted to the office do not affect the tracking drive any further, rather it remains in the position it has assumed.

After the closing date, the transferor of. the wires, bh and bi earth are switched off, so that the relays H and / drop out. The follower is brought into the rest position via switch arm c? 4: earth, contacts 33? /, 321, shackle arm ^ 4 on the segment, contacts 30 h, 31 /, magnet DM, minus. Relay V is switched on via contact 11 d of the rotary magnet DM : Earth, contacts 12h, 11 d, winding I of relay V, minus. At contact 33 z / the circuit of the rotary magnet is opened, so that contact 11 d and shortly thereafter the relay V drops out. The rotary magnet is switched on again via the closing contact 22 ν. In this way, the switching arms of the follower are moved step by step until the switching arm <f 4 expired from the segment and. the idle position of the follower has been reached. Then all the devices of the arrangement shown are in the rest position.

Unauthorized connections are blocked by the relay AB, which is connected to the switch arm ^ 3 of the follower with two consecutive but oppositely connected windings I and II. If, for example, the first series of impulses sent over the exchange line, for example according to number 9, indicates an inadmissible connection , the following circuit is established for the relay AB after the series of impulses, when the relay / has finished its impulse movement and remains energized for a long time : Minus, winding I of relay AB, contacts 341, 35 h, switching arm d $, contact 9, earth. The relay AB picks up and opens the contacts 1 from and 2 from in, the speech wires of the exchange line. The result is the same as described in the main patent. To the following! A permanent impulse is sent to public authorities, which causes a cessation of a public authority which goes beyond the extent of the number of sfirom impulses that has been cleared out and at the same time causes it to be triggered. The calling subscriber is sent the busy signal in any known manner and, after the final signal has been given, the monitoring device is triggered.

In the arrangement shown in the main patent, if several blocking contacts follow one another in the contact bank of the contact arm effecting the blocking, there is the possibility of an incorrect transmission of the numbered burst series sent. This is caused by the switching of the control relay F, which does not hold out when several blocking contacts follow one another and causes the connection path to be released prematurely. A connection that is permissible in and of itself can erroneously not come about because the free contact following the blocking contacts cannot be reached. In the present arrangement, this is

Source of error switched off. Whenever the switching arm d 3 reaches a blocking contact, ie a contact connected to the earth, the relay AB cannot respond during the pulse (contact 34 ″ open), since both windings are opposite. After the impulse has ceased (contact 34 t closed), the relay AB receives a pick-up delay due to the short-circuiting of its winding II, which prevents it from responding during the contact break (40 m / sec), since the magnetization curve does not reach the response point in the short time. As soon as the next pulse arrives (contact 341 open), the action of the oppositely directed windings sets in again with a renewed setting on a blocking contact, which removes any remanence in the relay. In this way, even with any number of blocking contacts in succession, the follower and the dialer building the connection path are precisely set, in accordance with the number current impulse. The switch-on of the relay AB after selecting a locking number takes place after the last pulse has stopped, immediately following the response delay, which only slightly exceeds the duration of a pulse pause (40 m / sec). There is therefore a relatively quick separation of the split arteries. after the blocking number. The desired effect could not be achieved with a normally used delay relay controlled by the pulse relay, since undesired switching processes (number transmission) can then be triggered from the subsequent connection path in the considerably longer time from the termination of the last pulse of the locking number to the disconnection of the voice line were.

The arrangement shown also provides for the evaluation of multi-digit identification numbers. For this purpose, three relays X, Y, Z are provided, the windings of which, I are wired to the contacts of the contact bank swept by the switching arm d 1. As only indicated in the drawing, the contacts in the paths of the switching arms d 2 and d 3 are connected in a certain arrangement to earth potential via contacts of these relays.

It is assumed that a connection with the identification number 83 is permitted, but a connection with the number 84 is to be blocked. After the first digit 8 has been transmitted, the switch arms of the follower are on the eighth contact. After the end of the series of impulses (relay / remains energized for a long time, relay V drops out), the following circuit is created: earth, contacts 13A, 171, i8w, 192, 2oy, 2.XX, switching arm d 1, contact 8, winding I of relay X , Minus. Relay X is located via contacts 13 & and 4 χ in a holding circuit via winding II, switching arm d'i is isolated at contact 2ιλγ. The contacts 8 in the. Contact banks of switch arms J2 and c? 3 are empty contacts.

If the subscriber sends out a series of current impulses consisting of three current impulses as the second, the switching arms of the follower reach contact 11. Switching arms d 1 and d ^ are on idle contacts. After relay V has dropped out, the following circuit is created via switch arm d2 : Minus, winding II of the relay /, contacts 23 h, 22 v, switch arm d 2, contact 83, contacts, earth. For relays / a continuous circuit is closed in this way, so that further series of current impulses no longer reach the follower. Triggering takes place in the manner already described.

If, however, the number 4 is sent as the second after the first number 8, then the switching arms of the follower are on contact 12. The switching arms d 1 and d 2 are now on Leerkomtakteni. About shift arm c? 3 is coming _; The following circuit is established: Minus, winding I of relay AB, contacts 34 i, 35 h, switching arm d 3, contact 84, contact x, earth. Relay AB responds and causes: in the manner described, the immediate release of the connection.

If 1 relay Y or Z is switched on with other identification numbers via switching arm d , then these relays close via contacts 3 y or 5 ζ auxiliary circuits for the windings II. Contacts y or ζ then decide whether to enable the connection path (circuit for / via switch arm d2) or block it (circuit for AB via switch arm c? 3).

If the exchange line is occupied by an exchange or by an authorized subscriber, the relay F is energized via wire bf. A short circuit has been established for relay // via contacts 10 / and 8/1 so that this relay cannot respond. The rotary magnet DM is switched off at the contact, 31 /, so that the number of current impulses that are now emitted are not monitored by the follower and the connection path can be established without hindrance.

If an inquiry is initiated in the course of an exchange connection, the relay W is switched on via its windings I and II via the wire and b ι. The pulse receiving winding I of the relay / is switched off by the pulse receiving wire bi at contact 25 w and connected to earth via contact 24 w (drag contact), so that the relay / remains constantly energized when a query is made and the follower cannot be influenced by the current surges sent . The relay //, which was excited via wire bh after contact gi was opened, remains for the duration of the query via contacts 7 w (drag contact), 13 h and earth.

Claims (3)

115 patent claims: i. Circuit arrangement for monitoring the impulses in telecommunication systems with: dialer operation, in particular telephony systems, according to patent 905 861, characterized in that a relay (AB) which causes the connection to be blocked is switched into the monitoring circuit in such a circuit that it is switched on when Blocking potential according to the The number current impulse series is only effective wind when it is triggered by the power surge relay (/) State is brought. 2. Circuit arrangement according to claim i, characterized in that the relay with two in series, but oppositely directed Windings (I and II) in the monitoring circuit is arranged and a winding (II) through the surge receiving relay is short-circuited, which means that the relay responds as quickly as possible Transmission of the key number for the blocking via the activated blocking potential enables wind. 3. Circuit arrangement according to claim 2, characterized in that the one winding of the relay through a normally open contact (34 i) of the indirectly operating surge receiving relay (/) is short-circuited. For this. 1 sheet of drawings © 9538 8.54