DE674828C - Circuit arrangement for counting connections in telecommunication systems, in particular telephone systems - Google Patents

Description

Circuit arrangement for counting connections in telecommunications systems, particularly telephone systems The present invention. refers to a Circuit arrangement for counting connections in telecommunications systems, in particular Telephone systems.

Its purpose is to ensure that the counting is carried out safely and to simplify it the transmission of metering current surges and achieves this by being in the connection path local institutions depending on the amount of the chargeable fee a certain Time is marked (by applying permanent potential to the connection line), during which switching means located at another point in the connection path the progression of the counter in one of the marking devices independent Make a sequence.

In certain cases. The transmission of the counting current surges, for example over long lines, associated with difficulties insofar as not security consists that all in one place: the connection path generated and via the connecting lines forwarded metering current surges arrive in the receiving device. This uncertainty is eliminated by the present subject matter. Furthermore, he can with great Advantageously used where only the speech wires are used to transmit the Counting current surges are available because when performing the count, in particular while the connection exists, the speaking can be disturbed via the speech arteries Participants are avoided to the greatest possible extent.

An embodiment of the subject matter of the invention is in the enclosed Drawing shown. In the drawing are all switching elements that are not necessarily to explain the subject matter of the invention are required, the simplicity and Clarity, omitted for the sake of clarity.

If the subscriber Tn lifts his receiver to establish a connection, the following circuit is closed for the relay R in the preselector VW : Earth, battery, resistance Wii, contact: 2 t, wire a, subscriber loop, wire b, contact 3 t, winding des- relay R, earth. The relay R responds in this circuit, so that by closing the contact 7r for the rotary magnet D of the preselector, the following circuit is established: earth, relay breaker RU, magnet D; Contacts 6 t, 7 r; Switch arm d .of the preselector VW, battery, earth, After .the first step of the preselector, the switch arm d is on the segment; so that the switching circuit for the magnet D now runs over this segment. The advance of the preselector VW takes place in a known manner until it finds a free group voter subordinate to it. If this is the case, the following test circuit is established: Earth, contact z2 k, head contact of the group selector, opened after the first stroke step of the same, winding of relay C, resistors Wis, Wie, switching arm c of preselector VW; Winding I of relay T (and parallel to it winding of meter Z, which cannot respond in this circuit), winding II of relay T, contact 7 y, switching arm d of preselector VW, battery, earth. In this circuit, relay C in the group selector and relay 7 'in the preselector respond. The preselector is stopped by opening contact 6 t. By closing the contact 5 t and immediately opening the contact 7r, the high-resistance winding II of the relay T is switched off, whereby the group selector GW found is marked as occupied. By opening the contacts 2 t and 3 t, the resistor Wi and the relay R are switched off from the speech wires, while the speech wires are switched through to the group selector GW by closing the contacts it and 4t. The locking circuit now proceeds as follows: earth, battery, switch arm d .of preselector VW in the working position, Tontakt 5 t, winding of the relay I T (to counter Z parallel; but which may not respond well in this circuit); Switching arm c of preselector VW, resistors Wie, Wis, winding of relay C, contact 12 k, earth. In the group selector, as already mentioned, the relay C was energized, initiating the known processes not shown here: Only one contact 9c is shown, through which the relay ZR connected to the lower speech wire via the choke coil Dy2 with ground potential is connected. Furthermore, after switching through the speech wires in the preselector, relays A and B in the group selector respond: Earth, winding of relay B, lower speech wire, switching arm b of preselector VW, contact 4t, subscriber loop, contact 1 1, switching arena of preselector, winding of relay A ; Battery, earth.

The participant now sends out the first series of impulses to set the group selector. As a result, following the # emitted pulses, relay A is made to drop out in pulses. In a known manner, not shown here, the group selector is set to a free connection line VZ, in that after lifting the group selector in a certain decade, the same selects a free connection line VL. After the first lifting step of the group selector, contact 12, k is opened: The blocking circuit is maintained, however, via contact 1 3 m (contact of the triggering magnet of the group selector), resistance Wi, and earth. The relay C also has a second winding, not shown here, which remains energized until the connection is complete.

If the group selector has now found a free connection line, so a test circuit comes about via the switching arm c of the group selector, the is now indicated here and in which the relay P of the group selector is energized. The relay P closes, among other things. its contacts $ p and i z p, making the speech arteries be switched through to the connecting line TL.

If the subscriber now sends the next series of current impulses to set the following connection device, which can be reached via the connection line, relay A is made to drop in pulses in the same way. The contact ioä follows these impulses and closes the following circuit each time it drops: earth; Contact zöa, switching arm a of the group selector GW, connecting line TL, contact 1 7 bi in the transformer UE, winding of the relay Al, battery, earth. The relay A1 thus picks up the pulses emitted by the relay A in the group selector and forwards them to the subsequent connection device, for example to a second group selector, which is set according to these pulses by closing the contact i8ai in pulses.

It is assumed that the second series of current impulses transmitted by the subscriber is decisive for the value of the connection. The second series of current impulses acting on the relay A1 in the transformer UE affects the magnet .Dm of the zone switch in the following way: earth, battery; Magnet Dm of the zone switch, contact 27 dl, contacts not shown, earth: The zone switch thus holds a certain number of pulses and thus switches its switching arm endm to a certain contact.

Further switching processes do not initially take place in the transformer: The subscriber establishes the connection up to by sending out further series of current impulses to the desired participant, whereby to be noted. that switching means is provided are that the action other than the second from the one calling prevent the number of impulses sent to the zone switch Dm.

If the called subscriber answers, battery potential is applied to the lower voice wire in a known manner in a device downstream of the transmitter UE. The following circuit then arises for the relay Bi in the transformer UE: earth, winding. of relay B1, lower voice wire and battery potential in a downstream connection device. The relay B1 in the transformer switches off the pulse relay A1 of the transformer by opening contact 17 b1. It also connects the switching arm dz,, of the time switch Dz to ground potential at contact 2o b1. Likewise, by closing the contact 21 b1 earth potential is applied to the switching arm dm . By closing the contact 28 b1, an 10-second switch is connected to the magnet Dz of the timer, so that the magnet of the timer receives current surges at intervals of 10 seconds. The time switch has three switching arms dz1, dz2, dz "which are thus incremented at intervals of 10 seconds.

It is assumed that the counter of the calling subscriber is to be incremented after each minute of the duration of the call. After one minute, the switching arms dz, to dz, are on the sixth contact. The following circuit is then established for the relay An: Earth, contact 2o b1, switching arm dz, on contact 6, winding of the relay An, battery, earth. The relay An responds in this circuit and connects to the following circuit at contact 26an: earth, battery, resistor WiS, contact 26an, switching arm da, the tap Da, contact 24s, winding of the relay 0, earth. In this circuit, the relay 0 responds, regardless of the position of the switching arm there, at its contact 25q in a holding circuit. The relay 0 also closes the double contact 19q. When the contact i 9 q is closed for the first time, the choke coil Dr, battery potential is connected to the resistor Wi, and the choke coil Dr4, which is connected to the lower speech artery, is connected. If the second contact is also closed, the resistor Wi, is short-circuited and the battery potential is now connected directly to the lower voice wire via the choke coils Dr and Dry. The following circuit is then established for relay ZR 'in group selector GW: Earth, battery, choke coil Dry, contact i9 q, choke coil Dr4, lower speech wire, switching arm b of group selector GW, contact iip, choke coil Dr2, winding of relay ZR, Contact 9 c, earth. The relay ZR in the group selector closes its contact 14zr and thus the following circuit for the relay X: earth, contacts i 5 y, i4, -r, winding of relay X, battery, earth. The relay X closes the contact i ix and thus the resistor like short on the blocking wire. The current on this wire is amplified in such a way that the counter of the subscriber Tn, which is parallel to the winding I of the relay T in the preselector, can respond. At the same time, contact 16x and thus the following circuit for delay relay Y in the group selector were closed: earth, contact 16x, winding of relay Y, battery, earth. The relay Y responds and opens the contact i 5 y and thus at the same time the circuit for the relay X. The relay X thus drops out and in turn opens the contact iix, so that the subscriber counter can drop. Opening the 16 x contact also interrupts the circuit of relay Y. This relay drops out with a delay, only closes the contact 15 y again after a certain time and thereby re-establishes the circuit for the relay X. This results in the second current amplification on the blocking wire and the second incrementation of the subscriber counter. The counting pulse is in turn terminated by relay Y, which interrupts the circuit for relay X at its contact i5y.

In this way, in a certain rhythm for which the training of the two relays X and Y is decisive and which one according to certain criteria can be set, caused increments of the counter of the calling subscriber.

The contact 3i q and thus the following circuit for the magnet of the pickup switchgear Da was also closed in the Gbertrager UE: earth, contacts 33s, 32u, 3 iq, magnet Da of the pickup, battery, earth. The switching arms there, and there, of the tap are thus switched to the next contact. The pickup magnet has a contact 34 da, which is now closed and closes the following circuit for relay U: earth, contact 34da, winding of relay U, battery, earth. The relay U opens its contact 32 u and .that the circuit for the pickup magnet Da.

The contact 34 there is therefore brought to waste, so that the circuit for the relay U is interrupted again. By closing the contact 32u the circuit for the A, gripper magnet is restored. The interplay between the pickup Da and the relay U continues until the switching arm dal has reached a contact marked by earth potential. If, for example, the zone switch Dm was brought to contact 2 by the second series of numbered current impulses sent by the calling subscriber. after four steps of the tap, while the relay U is still in the working position (it drops out after a delay), the following circuit is established: earth; Battery, resistance WiS, .Contact 26an, switching arm there, on contact q., Switching arm dz, of the time switch on contact 6, switching arm dm of the zone switch on 'contact 2, winding of relay S freed from short-circuit by contact 22 u, contact 21 b1 , Earth. In this circuit, the relay S responds, which opens its' contact 23 s and thus prevents its short circuit through the contact 22 u, which soon falls off. By opening: the contact 33s the circuit for the pick-up magnet Da is finally opened, so that it stops at the set contact. Furthermore, the relay S opens its contact 2.4s and thus the holding circuit for the relay Q. The relay Q drops out and opens its double contact 19 q; in such a way that first the short cut for the resistor Wi4 is canceled and only then the battery potential is switched off from this resistor. Opening the double contact 19 q causes the relay ZR in the group selector to drop. As a result, the contact z4zr is opened, so that the game between the relays X and Y, which, independently of other devices only working for themselves, make increments of the subscriber counter in a certain sequence, is ended. The duration of the potential application, initiated by closing the contact 19q in the transformer, is therefore decisive for the number of counting current impulses sent to the counter of the calling station.

The -Abgreifer Da 'in your transmitter UE remains initially set, and until the next ro-second pulse on the timer Dz has become effective. The switching arms d.1, dz2, dzs are then switched from their sixth contact to the first contact. Thus, the circuit for .the relay to be dz the switching arm, opened; and at the same time the circuit for the relay S is interrupted by switching the switching arm dzs out of its position 6. The following circuit is then established for the pickup magnet Da : earth, relay interrupter RUi, switching arm da, in working position, contacts 30s, 29q, pickup magnet Da, battery, earth. Under the action of the relay interrupter RUi, the pick-up is indexed until it has reached its rest position in which or switching arm da2 has run out of its segment. A re-excitation of the relay Q via the switching arm da, in the rest position, is initially not possible because the contact 26 is open. Only when the timer again reaches its sixth contact after one minute has elapsed. the relay An is energized and the contact 26an is closed. The relay Q is again excited and the battery potential is connected via the double contact igq. to the lower vein. The duration of the potential application depends on the time that the switching arm needs to get from its zero position to the marked contact. Of course, the speed at which the switching arm is advanced is also decisive, ie the design of the relay U. This means that you have a means at hand to precisely coordinate the duration of the potential application.

It was assumed that a connection with the valence, -> (i.e. Zone switch is in position 2) has been established. The way that the switching arm is there to move back from its zero position to the marked contact is four holding steps in such a connection. During this time the potential is applied to .the lower speech artery and .thereby; as described, the transmission of a certain number of counting pulses to the counter of the calling party Job.

If a connection is made to zone i, ie zone switch Dm is in position i, switch arm dz of the time switch is switched off, via position 6 of which contact 2 in the contact bank of switch arm da is identified. With such a connection of the switch arm required because of its zero position until the marked contact only two switching steps. So there is a potential application to the lower speech artery, the duration of which is half as long as in the connection described above. In each time unit with such a connection, only half of the previously sent counting current impulses are transmitted through the relays X and Y in the group selector to .den counter of the calling station.

From an explanation of the tripping of the devices shown can be dispensed with as the triggering processes for the subject matter of the invention are irrelevant.

Claims (1)

PATENT CLAIMS: i. Schältungsanördnun: g for counting connections in telecommunication systems. In particular telephone systems, characterized in that, depending on the amount of the charge to be charged, devices (Dm, Da) in the connection path indicate a certain time (e.g. by applying permanent potential to the connection line) during which at another point in the Switching means (X; Y) lying on the connecting path carry out the forward switching of the counter (Z) in a sequence independent of the identification devices. z. Circuit arrangement according to Claim i, characterized in that .the duration of the potential application is determined by the duration which a device (pick-up Da) requires - in order to get from an initial position to a marked position. 3. Circuit arrangement according to claim a, characterized in that; that the length of the switching path to be covered by the device is determined by a device set according to the value of the connection established (zone switch Dm). q .. Circuit arrangement according to claim i, characterized in that a switching means (relay ZR) influenced during the period of potential application brings the subscriber counter under the influence of a counter actuating device (X, Y) which influences the subscriber counter independently of other devices. 5. Circuit arrangement according to claim q :, characterized in that the counting actuation device (X, Y) always sends out current impulses to the subscriber counter in the same rhythm, so that the number of sent out counting current impulses is proportional to the duration of the potential application. 6. Circuit arrangement according to Änspruch 3, characterized in that .that by the zone switch (Dm) in the contact bank of the tap (Da) a certain contact is identified and that when the time for the counting implementation occurs simultaneously with the influence - the switching means causing the potential application (0) the step-by-step progression of the pick-up is initiated up to the marked contact and, when the same switching means (S) is reached, can be influenced to cancel the potential application. 7. Circuit arrangement according to claim i or 4, characterized in that the potential is applied to a speech wire and thereby the relay (ZR) which is connected to this wire and which switches on the counter operating device (X, Y) is operated. B. A circuit arrangement according to claim 7, characterized in that the application and disconnection of the potential takes place gradually in order to avoid interference on the speech wires. Circuit arrangement according to Claim 8, characterized in that the potential is applied or switched off in stages by switching off or switching on resistors (Wi4). ok Circuit arrangement for time counting young during the voice connection according to claim 1 or 8, characterized in that the potential is applied to a voice wire after each conversation time unit has elapsed and the counter actuating device (X, Y) arranged in the upstream device (GW) becomes effective. i i. Circuit arrangement according to Claim 10, characterized in that after each conversation time unit has elapsed, the switching means (Q) monitoring the potential application is switched on by a time switch (Dz).