DE889764C - Circuit arrangement for determining the number of a calling subscriber in telecommunications systems, in particular telephone systems - Google Patents

Description

Circuit arrangement for determining the number of a calling party in telecommunications systems, in particular telephone systems The invention relates to a Circuit arrangement for telecommunications systems, in particular telephone systems, with automatic Test facilities through which the subordinate position in the connection path identified line of the calling subscriber is determined. Here are the subscriber lines are connected to the connection devices via free dialers. The free voters are assigned impulse transmitters, which after a connection has been established be put into operation via this free dialer and one of the number of the calling Participant corresponding number of power surges over the line of the connection path send to a subordinate body.

In the known arrangements of this type are of the subscriber lines in each case individual lines branched off and connected to the contacts of the locking device assigned viewfinder selectors. By setting this viewfinder selector on the marked line is the number of the calling subscriber set. It is in the essence of this circuit principle that the area to be determined Subscriber numbers for each such determiner is only small; for example becomes a determiner using one hundred part seeker selectors required for every hundred participants.

According to the invention, the range of the numbers to be determined is essentially enlarged many times over without increasing the need for switching means, that a line selector assigned to the group of the calling subscriber for determination part of the number is also used. The arrangement is expediently made in such a way that that of the free voters and line voters assigned to the participants in groups Combined detection fields for the voters of the detection facilities instead of the individual lines that used to be common, now group lines and to determine one, for example the last digit of the number of the calling subscriber to take advantage of an already existing voter.

In the following an embodiment of the invention is described with reference to the drawings. Fig. I shows the overall arrangement in an overview image; 2 shows that part of the determination control circuit which has access to a plurality of call seekers and line selectors assigned to the calling subscribers via its searcher selector IM and access to several line selectors assigned to the same subscriber lines via its selector IF; in Fig. 3 the other part of the detection control circuit is shown.

The contacts of the relays, e.g. B. Vc, are in the drawing only with digits, z. B. i, however, in the description with small letters and numbers, z. B. vc i, denoted.

The arrangement will first be described in broad outline with reference to FIG. B. 2ooo Hz, to the point A. Similar points that are connected for the other twenty subscribers in the same contact bank of the line selector RS are interconnected and then jointly fed to contact B in a contact bank of the selector IM. - In response to a signal given via the starting line SW, the voter IM simultaneously searches for the identifier in contact B via its ten contact banks. With the help of the control circuit i C, the selector i F is started in order to select a line selector RS, which, as mentioned above, is characterized by its access to the subscriber S. The control circuit i C drives the number spindle of this line selector and sets it to the decade known from the tens digit of the number of the calling subscriber. The control circuit i C also actuates the brush trolley of the line selector to search for the bank contact connected to point A. If he has found it, this is the ones digit. set the number; and at the same time it is decided whether the hundreds digit is even or odd. Then the whole number of the calling subscriber is from the control circuit i C by means of series of audio-frequency power surges of a different frequency, z. B. 500 Hz, passed through the selector i F and RS, point A, first call finder i LF, a receiving device, not shown, to a printer device, also not shown.

In detail, the switching operations are as follows: The detection initiation pulse from the connecting line circuit used in a connection energizes relay Gs (Fig. 2), which in turn energizes relay Gb in series with relay 0t of a detection control circuit of the group. If all circuits of this group are occupied, the relay Ng responds to the starting circuit to another group. to forward _ control circuits. The relay Vd is then excited via vc 3 and et i and in turn causes the relays Vc and Do to respond. This opens the circuit for the relay Vd, so that it drops out with a delay. During the time in which the relay Vd is energized, a current of 2,000 Hz flows through vd 2, dc 2, primary winding of the transformer DT, d0 q. to Earth. The current induced in the secondary winding of the transformer causes the relay Ar to respond in the anode circuit of the tube DV, if this tube is in order. Relay 0k is excited via ax = and vb 2. The relay Vc has held over vc 3 and ot i, and the relay 0, k holds over ok 3, winding of the relay Vb and contact vc i. In this circuit, the relay Vb responds.

The circuit across relay Vd was opened when relay Yc was energized, and therefore the tube is checked during the delayed release time of relay Yd. If the tube is disturbed and therefore the relays Ar and 0k are not energized, the relay Va responds to the contact vd 3 as soon as the relay Vd drops out. By opening the contact va 2, the relay 0t would be de-energized and the control circuit would be triggered. The relay Va holds itself through its right winding and the signal lamp BAL.

If the tube is OK, relay Vd drops out, as do relays Ar and Do.

The magnet IMM now responds via ct 2, fla 2, ok i, ay i, and the voter IM searches freely for the group of lines that contains the line of the calling subscriber. When the group of two hundred lines is found, a high-frequency signal current runs via the third wire of the subscriber line and the capacitor connected to it, the switching arm of the selector IM, on which the group of twenty subscriber lines including the line of the calling subscriber is located, via the rectifier W. a bridge rectifier, e.g. B. R i, va i, ot q., A 3, Pb i, Po q., Primary winding from DT, do 2, rectifier Y to earth. The current of? Ooo Hz induced in the secondary winding of the transformer DT renders the tube DV conductive and energizes the relay Ar. About äy i, vb 2, af 5 then becomes. the relay Bt energized. Then a DC test relay Mt is switched on to check for a double connection: earth, a f i, mtm 2, mum i, rl i, high-resistance winding of MT, bt i, lt 3, imm ii, test battery.

If no other detection control circuit has been shut down on the same output, the relay Mt responds and stays in series with the relay Md via its low-resistance winding, which also responds. When the relay BI was energized, the relay Dc was via the contacts bt 3 and fit q. excited.

If the relay Mt is not energized in a double check, the magnet IMM responds again via ot 2, dc i and rynt i, and the selector IM starts looking again. In the event that the relays Mt and Md have responded, the selected output of the selector IM is immersed through the low-resistance earth via Md, Mt on the switching arm. ii marked as busy. .

If relay Md is energized, the magnet IF: VI comes to response via md 2, fit i, ft i, and the selector IF searches freely for a free line selector in the group that is identified by the position of IM . If a free line selector is found, the relay Ft speaks to: earth, dc 2, imm 13, i fm i, Ft, md i, i fna 3, wire, -q to the free c wire of the line selector RS, not shown, Battery.

The double check is carried out by relays Fd and Ft , and if IF is the only selector checking the line selector RS, the Fd relay is energized, followed by relays Fh and Do. At contact fh .I, the circuit for the relay Dc opens, which then drops out with a delay.

The relay Ar, which was energized by the current of 2,000 Hz through the selector IM, is caused to drop by the response of the relay Do, and the relay A f speaks about do i, af 2, fh 2, ok i and ar i at. Relay A f is maintained via do i and af 2 and also energizes relay Ta.

This completes a basic circuit: Earth, ar i, ok i, fh 2, af 3, Os, i fm 2, wire i, b wire of the line selector RS and a relay F i, not shown, of this line selector.

In this circuit, the relays F i and Os respond. The magnet MTM of the individual memory selector is excited via os i and us i. The actuation of the relay F i in the line selector causes a rotation of the number spindle and sends pulses back via the basic circuit, whereupon the relay Os drops out with each pulse and the selector MT switches on.

Earth via d0 q., Primary winding of DT, do 2, Iis q., Switch arm mtm 3 is applied one after the other to the wires i to io swept over by the switch arm mtln 3 , in order to connect the contact bank of mtln 3 with the selector arm imm i to imm io associate. When the arm imm, on which the tone of 2ooo Hz is reached, the relay Ar responds again and opens the basic circuit in order to bring the line selector RS and the selector MT to a standstill. The relay It then responds via a f 5, vb 2, ar i and in turn energizes the relay Us via it 2 and af 4. At contact us q. the circuit for the relay Ar is opened indirectly, which then drops out and closes the basic circuit again. Relay Us holds on .us 3, af q, and relay It drops out. The circuit for the primary winding of the transformer Dt now runs through do 2, us 4., i25 Hz filter, lt 2, switching arm i fm q, wire 3 to the line selector (test arm).

If the relay Fl in the line selector drops out, it is done in a known manner the control switch is switched to the position for single selection; it speaks again on, the basic circuit is closed and the brush carriage rotates.

At this moment, the reverse current surges are transmitted through the relay Os via os i, zas i to the magnet MUM of the 22-part memory selector MU. When the brush trolley reaches the contact of the c-core at which the 25 Hz potential is applied, the relay Ar responds, so that the relays Os and FL in the line selector RS come to waste and the brush trolley stops. The memory selector MU has made the same number of steps as the brush carriage of the line selector RS. The relay lt responds again, and the contact it i connects the battery via i fm 5 and line q. to a special relay in the line selector to prevent a free dialer from starting in the private branch exchange. If the ringing tone persists for a sufficiently long time, the relay It de-energizes the delayed relay Ta. This arrangement ensures that the brush carriage stops on the marked contact and is not brought to a stop by a current surge resulting from fluctuations in the direct current condition of the subscriber's c-wire. Earth via ar i, vb 2, af 5, us 2 and ta i energizes the relay Lt.

In the meantime, the detection circuit was held by earth potential via a contact of the relay 0t. During the transmission, earth is switched on via an i25 Hz filter, us 5, mtm 5, switching arm imm to a collecting point of the twenty multiple switched identification wires including that of the calling subscriber. This prevents low-frequency interference between the individual identification wires, while a detection circuit can communicate with another connection in the group.

If a premature trip occurs, the circuit will for the relay 0t interrupted, unless there is another call in the same Time is available.

If an early trip occurs while the line selector brush cart is running and the detection circuit is held for another connection, the line selector RS will not find a designated output in the selected decade and the selector MU will then take twenty-one steps. The relay Rl is then excited over mm 2 and is held by its contact rl 2. When the relay RL responds, the relay 0t, like the other relays, is de-energized. The relay X speaks through the breakers of the MTM and MUM and over. mtan 2 and afi and closes a circuit for the magnet MTM via xi, mtna i. The relay X works in this way with the magnet MTM and switches the selector MT back to the rest position. Then, in a similar manner, with the aid of the relay X, the selector MU is brought into the rest position. The relay Rl is then short-circuited and drops out via earth, af i, mim 2, mum i, rl i.

Assuming the conversation continues, relay Cw is energized via lt 2, i fm q :, line 3 and c-wire of the line selector. In parallel, the isolating relay of the calling subscriber responds, and the relay 0t is also held via cw i. If the connection is released during the transmission of the number of the calling party, the relays Cw and 0t drop out and the detection circuit returns to the rest position.

The various digits are determined in the following way and in transferred in a known manner. In a six-digit office system, the first two are Numbers known from the office. These first two immutable digits are respectively sent out in positions i and 2 of a control switch.

The thousands digit is indicated by 'the position of the selector IF or, with in other words, determined by the group to which the line voter belongs. the Hundreds digit depends on the position of the IF selector and that of the identification selector MU. As is known, the even hundreds are in the left and the odd hundreds connected in the right field of the line selector. This distinction is made by it stipulates that with an even hundreds digit, the units digit is not converted is connected because the even hundreds in the left field of the line selector are, d. H. the voter MU has a maximum of only ten power surges during the single election receive. If the hundreds digit is odd, the line voter's car must be used receive additional power surges to get into the right field. The tens digit is determined by the setting of the selector MT, while the units digit is dependent sent by the voter MU.

Claims (3)

PATENT CLAIMS: i. Circuit arrangement for determining the number of a calling subscriber in telecommunications systems, in particular telephone systems, with automatic test device through which the downstream of one in the connection path Point marked line of the calling subscriber is determined thereby characterized in that a line selector assigned to the group of the calling subscriber (RS, Fig. I) to determine part of the number of the calling party is also exploited. 2. Circuit arrangement according to claim i, characterized by a digit memory selector (lYIT, Fig. 3) in the detection circuit, which is in Step in step with the line selector when searching for the marked line will. 3. Circuit arrangement according to claim i and 2, characterized by. Detection fields that originate from the subscriber line circuit and are connected in parallel to the group detection selectors (I, M, Fig. I) and line selectors (RS; Fig. I). q .. Circuit arrangement according to claim i to 3, characterized by ten switching arms (z. B. imm i ... imm 1o, Fig. 2) of the group lock selector (IM, Fig.2), via which the group selection is carried out in parallel and via which is connected in series with a switching arm (mtm 3, Fig. 3) of the digit memory selector (MT, Fig.3), the identification test arrangement (Ar, Fig.2) with the identification multiple to control the setting of the line selector.