DE719897C - Circuit arrangement for counting connections of different values in telecommunications systems, in particular telephone systems - Google Patents

Description

Circuit arrangement for counting connections of different values in Telecommunication systems ,. in particular telephone systems The invention relates to a circuit arrangement for counting connections of different values in telecommunication systems, in particular telephone systems.

The influencing of the counter of the calling station can lead to different Points in time. While with single counts, z. B. for local connections, the forwarding of the subscriber counter is usually done at the end of the connection , the counting current surges for higher-order connections and multiple counting either when they become due while the connection is active for the counter fed, or they are collected by storage devices and at the end of the Transfer the connection to the meter.

The latter way has the advantage that the lines during the connection remain unaffected by the processes for carrying out the count, it results but the disadvantage that the cost of switching means is relatively large and Maintain the established connection path for a long time after the call has ended must remain, namely until all counting current surges are transmitted.

When transmitting the counting current surges during the existence of the Connection exists if only the speech wires are available for this purpose, the difficulty of counting without disturbing the participants speaking and the over to carry out the switching operations to be carried out on the speech wires.

The invention now indicates a way without significant additional expense additional switching means the counting during the connection without these disturbances perform and at the same time also a single count after the final signal has been given enable what is achieved in that the counting transmission relay with a rectifier lying parallel to it is arranged in such a way that that it is blocked against direct current while the connection is established, symmetrically lies between the speech lines and is eliminated after the connection has been terminated the direct current blocking to a voice wire transmitting the counting current surges is switched on.

The drawing shows an exemplary embodiment of the subject matter of the invention shown. All switching means and circuit arrangements that are not necessarily used for Explanation of the inventive concept are required are of simplicity and Has been omitted for the sake of clarity.

In the left part of the drawing parts of a group selector are shown, in a known manner by a numbered current burst series sent by the calling subscriber is lifted into a certain decade, whereupon the automatic in this decade A free subsequent connection device is selected. About the shown Group dialers can establish local calls, which are then sent via other group mv and a line selector run to the desired subscriber. Also higher quality Connections are made using the group selector. According to a certain setting In this case, it becomes a free time zone set ZZZ. the one in the right part the drawing is switched on.

The group selector is assigned as follows: battery potential in an upstream connection device, test wire c, resistor Wil, contacts 5 zr, 8 b, head contact iokk (closed as long as the group selector is in the rest position), windings 1I of relays A and B. , Earth. In this circuit, relays A and B respond in the group selector. Shortly thereafter, the supply circuit is also closed, so that the two relays A and B are also excited via the speech wires and the I windings. By opening the contact 8 b, the short circuit around the occupancy relay C of the group selector is eliminated so that it responds. Via the '%' G 'resistor Wil and the double contact 9 c, we are placed in a holding circle independently of the head contact io kk.

The calling subscriber now sends out a series of numbered bursts, through which the group selector shown in a known manner in a certain decade is lifted.

It is assumed that the group selector has been set according to a higher-order connection, so that a free time zone set ZZZ is switched on via its switching arms. As long as it is still in the idle state, the following idle circuit exists in the time zone set: battery in a subsequent connecting device, wire c., Winding of the relay ILr, switching arm dan. in rest position, contact 58c1, switching arm d13 in rest position; Contact 6o 1i, winding of relay R, earth. In this circuit only the relay K1- responds, which keeps its contact 3o kr closed and thereby turns on the winding II of the occupancy relay Cl of the time zone set to the switch arenas c of the group selector. -After finding a free time zone set, the following circuit is established: Earth, contacts gc, 1,2 a., Windings II and I (contact 16c is open and the short circuit for winding I is thereby canceled) of relay P, switching arm c of the group selector, Contact 3o kr, winding II of relay Cl, battery, earth. In this circuit, the test relay P in the group selector and the occupancy relay Cl in the time zone set. The speech wires are switched through at the i8p and igp contacts. The high-resistance winding II of the test relay P is short-circuited at contact i5 p, thus preventing, in a known manner, the activated time zone set from being occupied by another group selector. Through contact 3 p, a resistor such as earth potential is applied to the assignment wire c coming from the upstream device (preselector) and the triggering of the upstream device is made dependent on the relay P. By opening the contact 32 cl in the time zone set, the winding I of the occupancy relay Cl is freed from the short circuit and by closing the contact 31 cl this winding is included in the test circuit. The winding of the relay lir is short-circuited by contact 29c, so that it drops out.

The next number of current impulses sent by the caller is transmitted through the impulse receiving relay A of the group selector to the rush receiving relay A1 of the time zone set in the following way: earth, contacts 9c, iia, igp, switching arm a of the group selector, upper left winding of the ring transformer, contact pulled, winding of relay Al, battery, earth. The current impulses picked up by the relay -, A1 are transmitted to the contact 28a1 via the upper voice wire a. passed on to the subsequent connection devices. At the same time, the zone switch is set, the magnet of which is marked Dan: earth, contacts 55 k, 56a1, magnet D111., Battery, earth. The switching arms dm, and (111r_ are thus brought to a specific contact. The process of the zone detection is not essential for the invention. It is widely known to carry out the zone detection according to a multi-digit identification number. For the sake of simplicity, the embodiment is set up so that already after The zone is identified by the first code number acting on the time zone set. The zone identification is carried out .. via switching arm dzn1, while the switching arm din. is used to return the zone switch to the rest position. By closing contact 71 a1, relay V with its two windings I and II switched on. A short circuit is produced for winding I at contact 72 v , so that this relay receives such a drop-out delay that it keeps its armature in the working position during the series of current impulses until Zo V is set, so comes after its termination and the relay h drops out, the following circuit is established: earth, contacts 49 ci, 5o v, switching arm dmi, any one of the zone points Zo I to Zo V, contact 52g, winding I of relay K, battery, earth. The relay K responds in this circuit and opens its contact 55 k. This prevents the zone switch from being influenced by further series of N number current impulses, which are now forwarded to the subsequent connection devices via contact 2, 8 a1. A holding circuit via winding III of relay K is prepared at contact 46k.

If the called subscriber answers, the relay G via its winding I speaks via speech wire 62, lower right winding of the ring transformer. It closes the following holding circuit: earth, contacts 33 aia 349, winding II of relay G, battery, earth. Furthermore, the following hold circuit for relay IL is closed: earth, contacts 33 c1, 3-1g, 41 e, winding III of relay K, contacts 46 k, 48 x, resistor Wi8, battery, earth. At contact 5zg, winding I of relay K is switched off by the zone points. By closing the contact 66g, the magnet Da of a switching mechanism is connected to a ten-second contact, so that the switching arms da. until they are incremented at intervals of 10 seconds each. The switching mechanism with the magnet Da thus serves as a time switch. As will be described later, it also serves to access the charge units due for each time unit of 3 minutes and to send them to the subscriber counter.

The calling subscriber is granted a certain amount of time, the so-called waiting period, which saves him from being charged too high a charge if a wrong connection has been made and the listener is hung up at the calling station within the waiting period. In such cases, the calling subscriber's counter is only incremented once; which proceeds in the following way: The waiting period is a maximum of zo seconds. The switching arm there, the tap would reach the second contact after the waiting period had expired, so that a circuit for RelaisE would come about. However, if the subscriber hangs up the receiver within the waiting period without the relay E being switched on, the following circuit is established after the P , relay A and B and relay C, which is short-circuited at contact 8b, drop: Earth, battery, winding III of relay P, contacts 14c, zgp, switching arm a of the group selector, upper left winding of the ring transmitter in the time zone set, contacts 2r g, winding I of relay X, contact 23 k, lower left winding of the ring transmitter in the time zone set, Switching arm b, contact 18p, right lower winding of the ring transformer in the group selector, contact 4c, winding of the relay Zr, earth. In this circuit, the relay X in the time zone set and the relay Zr in the group selector respond, while the test relay of the group selector is kept energized via its winding III and a secure transmission of the counting current impulse is guaranteed before the connection path is triggered by connecting to earth via contact 3 p. By closing the contact zzr, a current gain is generated on the occupancy wire c, by means of which the counter of the calling subscriber is incremented in a known manner.

The rectifier Gl, which is parallel to the relay Zr, is connected in such a way that that he for the current direction in your just listed circuit of the relay Zr is impermeable.

By closing the contact z3zr becomes for the winding III of the relay P a short circuit closed across resistor Wi5. The drop in relay P conducts the triggering of the connection path in a known manner.

In the time zone set, relay X was energized by opening of contact 35x prevents unwanted influence on relay E. Through open of contact 48 x is the existing short circuit for winding II of relay X. opened, so that the winding II of the relay X is energized.

After the relay P has dropped, the contacts 18 p and 1 9 p and thus the circuit listed above for the relay Zr are opened. The relay Zr thus drops out, so that the counting current surge is terminated by opening the contact zzr. After opening the contact 1 5 P the circuit for the occupancy relay C1 of the time zone set is interrupted, so that the circuit for the relays G, K and X is interrupted at contact 33 cl and these relays drop out.

For the magnet Because of Abgreifers now following circuit is closed: earth, battery, magnet Because, contact 65g, shifting the on the segment, contact 6ou, winding of the relay R, earth. The switch arms of the tap are thus brought to the next contact. Relay R also responds in this circuit, which switches on winding II of relay U at contact 5i r. By opening the contact 6oit, the above circuit for the magnet Da and the relay R is interrupted. The circuit for relay Ij is therefore interrupted again at contact 51r, so that the circuit listed above for Da- and R is restored at contact 6oit. The switch arms of the tap move to the next contact. This game continues until the switch arms of the tap have reached their rest position. Then the following circuit is established: Earth, battery, magnet D-in of the zone switch, switch arm dm. on the segment, contact 58c "The switch is in the rest position, contact 6o it, winding of relay R, earth. Din and R respond. The switching arms of the zone switch thus move to the next contact. Relay R again switches on relay U winding II and The circuit for Din and R is interrupted at contact 6o. The game between Din, R and U continues until the switching arms of the zone switch have reached their rest position the relay kr applied, which now responds again.

If, after a free time zone set has been switched on by the group selector, the calling station sends out a series of impulses, by means of which the established connection is marked as being charged according to the local tariff, the following circuit is established after this series of impulses and relay I 'dropping out: Earth, Kontakted9cl, 5o v, switching arm dm "local zone point OZ, winding I of relay U, parallel to it winding II of relay k, battery, earth. In this circuit, relays K and U respond Magnets Da, of the pickup switched off, so that a time count for the connection is omitted. Otherwise, the charge, ie the transmission of a Zälilstroinimps, takes place on the strike of the connection in exactly the same way as with higher-quality connections, if the listener is within the waiting period is hung up at the calling station, which has already been described in detail.

Let us now consider the case that a higher-quality connection has been established and that the connection has existed for more than three minutes. The switch arms dinl una diii. of the zone switch are, as already mentioned, on any of the zone points Zo I to Zo V. After the called station had been reported, the relay G was energized, which connects the ten-second contact to the magnet Da of the tap at contact 66g. If, after the tap has been switched on twice and after the waiting period has expired, the switch arms of the same reach the second contact, the following circuit is created for relay E: Earth, contacts 33 cl, 3-1g, 35x 361z, switch arm da = in position 2, contact 39y, winding of relay E, resistance battery, earth. The relay E responds in this circuit and closes a hold circuit at contact 4.o e. By opening the contact .Ii e, the holding circuit for the relay K is interrupted so that it drops out. The charge, ie the metering current pulses are sent out, takes place during the connection and always at the beginning of a time unit. The response of relay E initiates the transmission of the first series of counting currents, which takes place in the following way: At contact 69 e, the ten-second contact from magnet Da of the tap is switched off for the duration of the counting current surge transmission. By closing the contact 68e the following circuit is formed: Earth, battery, magnet Du, the tap, contacts 66 g, 68 e, 62 q, 6 iy, 6o u, @ Z'icklung of the relay R, earth. In this circuit, the magnet Da, the tap and relay R respond. The switch arms of the pick-up «are thus conveyed to the next contact. Relay R switches on relay U winding 1I at contact 5 ir. The circuit for Da and R is interrupted at contact 6oit and the circuit of relay L 'is then interrupted at contact 5i r. By closing the contact 6o it, the above-mentioned circuit for Da and R is restored, so that the switching arms of the tap take a further step. Relay R turns on relay U, which interrupts the circuit for Da and R at contact 6o. This game continues until the switching arm of the tap has found the contact that is connected to the zone point to which the switching arm dml of the zone switch is set. The following circuit is then established: Earth, contacts 49 cl, 5o v, switching arm dm, of the zone switch, one of the zone points Zo I to Zo V, one wire of the tariff cable TK, switching arm da, of the tap, contacts 53u, '54e, winding I of relay D, battery, earth. The relay O is placed in a hold circuit via its winding II and the contacts 38 q, 40 e, 349 and 33 c1. The winding of the relay R is short-circuited by contact 59 q, so that the interrupter cycle just described stops. The tapping continues, however, controlled by other switching means and in a different cycle that is more favorable for the emission of counting currents. A circuit for relay IVi is established via contacts 38q, 42 is and 43y. The relay! B1 causes the transmission of the first counting current impulse, namely a grounded alternating current source WO via contact 26 m. connected to both speech wires. This alternating current power source is above contacts 24 e and 22 k at the lower and, contacts 24e and 2I g against the upper opening vein. Alternating current counting current impulses are thus sent simultaneously via both speech cores by relay 111. The counting current surges continue in parallel via the switching arms a and b of the group selector, - the contacts 8 p and i 9 p, transformer windings, winding of the relay Zr, parallel rectifier G1, earth. The relay Zr of the group selector is excited by one half-wave of the applied alternating current. By closing the contact 2 zr, a current amplification is generated on the blocking wire in a known and described manner in order to pass on the counting current impulse to the subscriber counter. The short-circuit for relay Y that had existed up to that point is canceled by contact 45 ira. By closing the contact 64m of the magnet receives Since the Abgreifers in the following way a current surge: earth, battery, magnet Because of Abgreifers, contacts 66g, 68e, 63q, 64m, shifting the on the segment Kontalcte6ou, 59Q, earth. The switch arms of the tap are thus brought to the next contact. The magnet Da of the tap has a contact 47 da, via which the following circuit for relay Y is now closed: Earth, contacts 33 c1, 34g, 40 e, 38 q, 42 u, 47 da, winding of relay Y, resistor LTVi7, Battery, earth. By opening the contact 43y, the circuit of the relay IYl is interrupted, which then drops out and terminates the first counting current surge by switching off the alternating current source. Earth potential is applied to contact 25M instead of the alternating current source. At contact 44y, the winding of relay Y is placed in a holding circuit independently of contact 47 da of the tap, but this does not last long, since the short circuit for relay Y is restored via contact 45, which drops with a delay. The relay Y thus drops out and again places the winding of the relay 1y1 in the above-mentioned circuit at contact 43y. By closing the contact 26111, the next counting current impulse is given simultaneously via the two speech wires, while at the same time a further continuation of the tap takes place at the contact 64M. This game continues until the gripper has reached its rest position and its switching arms are in the starting position. As many counting current surges are thus sent out by the tap as switching steps are required to bring the tap from the contact marked by the switching arm dm of the zone switch via a zone point to the rest position. In the rest position of the switching arm da2 of the tap, a short circuit is produced for the winding of the relay E via the dropped contact 39y, so that this relay drops out. By opening the contact 40 e, the holding circuit of the relay O is interrupted and this is brought to waste. As a result of the opening of contact 4o e, relays 111 and Y cannot be switched on again for the time being. The ten-second contact is in turn applied to the magnet Da de's tap via contact 69 e. From its rest position, the tap is switched on at intervals of 10 seconds until, after a further conversation time unit of 3 minutes, the switching arm da2 of the tap comes to contact 18. Then the following circuit is established for relay E: earth, contacts 33c., 349, 35x, switching arm da2 of the tap on contact 18, contact 39y, winding of relay E, resistor ff "i6, battery, earth. Via contacts 66 g, 68 e, 62 q; 61 y, 6o u, the interrupter circuit is now closed again for the pickup Da with relay R. The pickup peeling arms are now switched beyond the rest position again up to the contact, which is via a zone point Zo I to Zo V and the switching arm dm, is connected to ground potential. By responding to relay O and closing contact 38q, the circuit for relay II is again established, which now initiates the transmission of the next series of counting currents in the manner described then guaranteed if the calling subscriber hangs up his receiver while a series of counting currents is being transmitted d the winding III of the relay P is applied to the upper voice wire and this relay is connected to the alternating current source or contact 25 ita during the transmission of the counting current impulses via contact igp, switching arm a of the group selector, transformer winding, contacts 2i b, 24 e, 26n and earth, Earth kept energized (safety circuit). This relay maintains the connection at contacts 3 p and i 5 p until the series of counting currents is completely transmitted. Only when the double contact 24 e is open after the count current impulse sequence has ended and the relay E has dropped out, the relay P of the group selector can drop out and trigger the connection.

In order to prevent the relay C in the group selector from dropping during the transmission of the counting current impulses, which could occur because this relay is short-circuited by contact 2 zr, the fuse is made that a normally open contact 6z; - and resistor 9 ' i3 battery is applied to relay C during the counting current surges and so its excitation is maintained.

If a local connection is established that does not run over a time zone set, then, in a known manner, at the end of the connection in the line selector, counting potential is applied to the lower voice wire. Through this counting potential, the counter relay Zt- is excited via the dropped contact - [ c, which forwards the counting current impulse at contact 2z5- to the subscriber counter. The rectifier lying parallel to the relay Zr is impermeable to the direction of the current in the circuit of the relay Zr.

Claims (6)

PATENT CLAIMS: i. Circuit arrangement for counting connections of different values in telecommunication systems, in particular telephone systems, characterized in that the counting transmission relay (Zr) with a rectifier (GI) lying parallel to it is arranged in such a way that it is blocked against direct current while the connection is being made, symmetrically between the speech wires and after termination of the connection, removing the direct current blocking, it is connected directly to a voice wire transmitting the counting current surges (at contact 4c). 2. Circuit arrangement according to Claimi, characterized in that the counting transmission relay with the rectifier lying parallel to it to the opposed by capacitors DC shut-off center of a ring transformer is connected while it via the contact of a relay indicating the termination of the connection Disconnection of a capacitor of the transformer directly to the counting current surges transmitting voice wire is switched on. 3. Circuit arrangement according to claim i, characterized in that during the connection by the meter forwarding devices (ZZZ) for each alternating current metering surge to be transmitted simultaneously to the speech wires created% vird. .l. Circuit arrangement according to Claim 3, characterized in that that during the transmission of counting currents a connection maintaining the connection Circuit (catch circuit) is prepared, which when the connection is terminated during the counting current impulse transmission comes into effect and the connection is released prevented until the end of the counter current surge transmission. 5. Circuit arrangement according to claim r, characterized in that for connections with only one actuation of the Subscriber counter the counting transmission relay in a circuit (catch circuit) is excited, in which also a premature release of the connection preventing Switching means (P) is influenced. 6. Circuit arrangement according to Claim 5, thereby characterized in that this circuit runs in a loop over both speech arteries and for the production of this circuit in the speech line lying DC converters locking devices are bridged (at contact 21 g). ;. Circuit arrangement according to claim 5. characterized in that the parallel to the counting transmission relay lying; Rectifier is arranged so that it is responsible for the direction of current in the Circuit for the counting transmission rclais is impermeable.