DE972136C - Circuit arrangement for telephone extension systems with dialer operation and a workstation that can be controlled by the extension participants - Google Patents

Description

ISSUED JUNE 4, 1959

D 18679 VIII a / 2id *

has been named as the inventor

Berlin

Workplace

In larger private branch exchanges with dialer operation is for the purpose of providing information and the exercise of a special switching activity a service point in the branch exchange intended.

In particular, this body is responsible for monitoring operations, taking into account the different authorizations assigned to the individual extensions. Participants with semi-official rights, those who are not able to establish trunk connections themselves control via the Message line to the · workstation of the operator station, which is then used to connect an exchange line to the extension with semi-office authorization cares. If the number of semi-official participants is very large, then under certain circumstances Operation can no longer be managed via the usually only reporting line.

The purpose of the present invention is to improve the operation when arranging several message lines for the ao Make the control point as simple as possible, especially the number of signaling and Restrict operating aids as much as possible, and even no longer provide these aids, than if there was only one reporting line. According to the invention this is achieved in that Peeling means of the message lines leading to the workplace in such a way on common, the

909 5240

The circuits assigned to the workplace ensure that all of the circuits required to handle the calls Switching processes (signaling, connection, allocation of exchange lines with release of the Reporting line) with the help of the organs common to all reporting lines at the workplace or initiated.

In the drawing, an embodiment of the object of the invention is shown. All switching means and circuit arrangements which are not used directly to explain the concept of the invention have been omitted for the sake of simplicity and clarity. In the upper part of the drawing, the interrogation apparatus AA of an operator station that receives inquiries and initiates the allocation of trunk lines is shown. Outgoing connections can be made by the officer via the connecting line going from this apparatus. It has a switchover point through which subscribers calling via a message line are connected to the interrogation apparatus. Of the switching and signaling means assigned at the officer's place, the MEL signaling lamp, the MKL signaling control lamp, a TT button for assigning an exchange line, and an AT button (bottom center), through which the connection of calling reporting lines to the connection line of the interrogation device of the operator station, are shown is, hook switch contacts 4HU and 5 HU. The part common to all message lines contains a relay MM for receiving and forwarding the allocation criterion, a relay MS for actuating the switching point in the connection line of the interrogation apparatus and a relay RM for monitoring the message control lamp.

There are three incoming ends to the operating point running message lines shown. The assigned to the individual message lines Switching means and circuit arrangements are separated from one another by dash-dotted lines. The equipment of the lines is essentially the same as one another.

The reporting point is reached after certain code numbers have been sent, for example using a line selector that has been set accordingly. The line selectors are designed so that they are on a multiple contact after receiving the'Meldenummer. If the first message line is busy, the line selector continues to rotate freely until it has found a free message connection. It is initially assumed that when the other message lines are free, the line selector occupies the first message line, that is to say that the control point is controlled via the Adernαϊ, b 1, ei. The following circuit is established via the test wire: earth in the line selector, test wire, contact 31 in, winding of relay Ri, contacts not shown, winding of relay Ti, minus. The signal lamp is switched on by contact 6ri: Minus, resistance Wi 1, contacts 6r i, Jtri, signal lamp MEL, earth. The ringing current sent out via the voice wires a 1 and b 1 of the line selector rhythmically influences the relay arrangement ΑΊΑ ι (with rectifier and capacitor). By closing the contact 12 at 1, earth potential is applied to the alarm clock line WK via the hook switch contact 4, HU . The operator station recognizes the presence of a call from the optical and acoustic signal. Relay T 1 opens the short circuit for the winding I of the relay N1 at contact 17 ί ι and prepares the switching on of this relay via contact 18 tx. After taking off! of the handset on the interrogation device · the hook switch contacts are activated. The circuit for the alarm clock is interrupted at contact 4HU. The official presses the query button. The following electrical circuit is created via Keysenkcwvtakt 85 ^ iT: earth, hook switch contact 5 HU , switching means, not shown, winding of relay RM, key contact 85 AT, contact 18 ί i, winding I of relay Ni, resistance Wi2, minus. In this circuit ^1, the relays RM (initially without effect) and Ni respond . After releasing the key, relay N1 remains energized via key contact 84 ^ iT ₁ contact i6ni and winding II. Relay Mi addresses via contact 14m ι: minus, winding of relay M i, contacts 14.n1,42712, 69 W3, hook switch contact S HU, earth. In addition, the following circuit for the relay MS is closed in the common part: earth, hook switch contact 5 HU, contact 13 »η ι, winding of the relay MS, minus. Via contact 83 ms relay MvS "is placed in a hold circuit which remains in place until the receiver is attached to the interrogator. By opening contacts 22 ms and 24raj, the connection line of the interrogator is disconnected from the continuing line and via contacts 23 ms and 25 ms switched to the wires leading to the message lines. By closing the contacts 26 mi and 29ml, the first message line is connected to the connection line of the operator station. After switching through the line selector (switching off the ringing current), the calling subscriber can make his wishes known to the officer on duty If the subscriber wishes to be assigned an exchange line, the officer presses a button, if the subscriber has office or semi-office authorization, through which contact 3 TT is closed , Winding I, closed. Relay speaks via contacts 2 mm and 19 m 1 TR 1 which, by opening the contacts 27 in, 28 in and 31 in, activates the signaling line from the monitoring means connected to it. Via the contacts ι WiW and 21m ι negative potential is applied to the test wire c 1 leading to the line selector via iao the low-resistance winding II of the relay MM . As a result of this current amplification, a switching process is triggered in the line selector in a known manner, which brings about the start of an exchange line dialer and its setting to the calling subscriber. Flickers during this time

the signal lamp MEL : earth, lamp MEL, contact 8 in, flicker FL. The connection of the exchange line is followed in a known manner by the triggering of the internal connection path with the line selector. In the course of the triggering, ground potential is switched off in the line selector from the test wire ei, so that the relay MM, which only held up via its winding II after the button contact 3 TT was opened, drops out. As a result, the relay TR 1 is also made to fall. The MEL lamp goes out to indicate that the subscriber is connected to the exchange line. After hanging up the receiver on the part of the officer, the circuits for the relays MS, RM, M ι and N 1 are interrupted at the opening hook switch contact 5 HU. The system is now in the idle state.

If a line selector is set to other message lines, for example the answering station is occupied via the connections a 2, b2, c2 or «3, & 3, c 3, the relays R 2, T 2 or R 3, T 3 excited. The signal lamp MEL is switched on via resistors Wi 3 or W14 and contacts 34T2, 35 ir2 or 63r3, 6iir3. Due to the ringing current applied in the line selector, the relay AM2 or AM 3 is switched on via contacts 53 ir 2, 54 tr 2 or 76 ir 3, 77 ir 3, which switches on the alarm clock by closing contact 39 on 2 or 66 on 3 . After pressing the call button, the relay N 2 and N 3 via contacts 45 12 and 17 are switched on via key contact 85 AT and after opening the short circuit for winding I of relay N 2 on contact 45 i 2 via contact 46i2. After releasing the button, a holding circuit is closed via button contact 84 AT and contacts is η 1 and 44η2 via winding II of relay iV2 or via contacts 15 η ι, 43 η 2 and 72 »3 via winding II of relay N ^ . Relay M 2 or M 3 is switched on via contact 41 μ2 or 68113. Relay MS with holding circuit is energized via contact for 83 ms via contact 40 m 2 or 67 m 3. The connection line of the control unit is connected to the message lines at the j contacts 23 ms and 25 ms. Via contacts 51W2, 52 m 2 or 75 ^ 3 »79 ^ 3, the second and third message lines are connected to the interrogator via the connecting line. If the officer assigns an exchange line, after the relay MM has responded, the low-resistance winding II of the relay MM is connected to the test wire c 2 or ct> via contact 48m 2 or 74 W 3, thereby connecting the exchange line influencing organ causing the calling participant. Relay TR2 or Ti? 3 is switched on via contacts 47 m 2 or .73 »13 , which causes the signal lamp MEL to flicker via contact 36 ir2 or 62 ir3. All other processes can be derived from the previous detailed description.

Let us now consider the case that a further report call comes in while a report call is being processed. If a different line selector is set to the second message line during the processing of a call received via the veins ατ, bi, ei , ie the workplace z. B. occupied via the wires a 2, bz, C2 , then - the relay RM was energized in series with the relay iVi in the manner described - via contact 82 rm and contact 38 r 2 of the relay R 2 assigned to the second message line Flicker circuit for the signal control lamp MKL closed: earth, signal control lamp MKL, contacts 81 rm, 37 η 2, 38 r 2, 82 rm, flicker symbol FL. (If the third message line is occupied, the flickering circuit would run via contacts 64 «3 and 65 r 3.) While the officer is busy processing the first message call, the MKL message control lamp draws her attention to the presence of further message calls. You do not need to hang up the receiver after the first report call has been processed, so that the relay MS continues to be energized and the connection of the connection line to the report lines is maintained. When the call button is pressed, the button contact 84 ^ fT and thus the holding circuit for the relay Ni of the first message line is opened. The relay N 2 now responds via key contact 85 AT , which was applied in preparation to the working side of the key via contact 46 12. The sequence of further processes proceeds in the manner described.

Claims (3)

PATENT CLAIMS: gg ι. Circuit arrangement for telephone extension systems with dialer operation and a workstation that can be controlled by the extension subscribers, characterized in that several message lines lead to the workstation and switching means thereof act on common circuits assigned to the workstation in such a way that all switching operations (signaling, connection, allocation of trunk lines with the release of the reporting line) with the help of the organs common to all reporting lines at the workplace (MEL, MKL, WK) or initiated (AT, TT) . 2. Circuit arrangement according to claim 1, characterized in that the assignment of a message line characterizing switching means (T, AM) bring common circuits of the workplace to effect, via which the presence of a call characterizing, all message lines common signaling means (MEL, WK) are switched on. 3. Circuit arrangement according to claim 1, characterized in that the connection of the calling message line to the workplace and iao the allocation of an exchange line through all message lines common switching elements (AT, TT), which after preparation by the message lines associated switching means (T, M) common Bring electric circuits to effect, be initiated. 4 · Circuit arrangement according to claim ι, characterized in that with simultaneous control of the workplace via several message lines during the handling of a call by switching means of the other waiting message lines via a common circuit, a special signal (MKL) is switched on, through which the officer on the need attention is drawn to the processing of further reporting lines. Considered publications:
K. Scheibe and H. Wolffhardt, "Telecommunications engineering of telephone construction &Normalzeit", 1949, pp. 226, 229 with pictures 301, 306, 307. 1 sheet of drawings © 509656/99 1.56 (9095M / J5.59)