DE410674C - Circuit arrangement for telephone systems with dialer operation - Google Patents

Description

Circuit arrangement for telephone systems with dialer operation. The invention refers to telephone systems. with `` Väh: erbetrieb '', especially those in which high-quality connections are made via special workplaces .. With these systems, the calling participant notifies the officer in addition to the desired, also with his own number, whereupon the officer crediting the for the Link causes fees to be paid.

The invention now aims to give the officer switching means through which they ensure correctness in a simple and reliable way in the case of multiple connections the own number given by the calling subscriber. Achieved this is achieved by the fact that the officer has a special one that runs over a surge receiver Auxiliary circuit manufactures on whose. End-, vähler, der, at the same time as checking selector serves, the control wires of the multiple lines of the subscriber are connected.

In the drawing, two circuit arrangements are shown as exemplary embodiments shown for subscribers with multiple connections.

In Fig. I, the test leads of the multiple lines of the subscriber are A (private office) individually to the contact field of the test selector CFS, while in Fig. 2 all test leads pulled together via capacitors to form a common line 22 connected to contact 31 of the test selector CFS.

The switching processes are now based on the current flows (Fig. Z and 2) are explained in more detail.

It is assumed that a subscriber A (Fig. I) who has several trunk lines is trying to establish a connection with a subscriber for whom special charges are to be paid. For this purpose, it establishes a connection via the automatic selector switches i LF, 2 LF, i GS, 2 GS and 3 GS, which are only indicated in the drawing, to the workplace of the exchange to which the desired subscriber is connected . The call may be made visible to the officer there in some known way. The officer gets in touch with the calling subscriber, who gives her the desired number and that of his own line. After pressing the CD "K button, the officer now sets the automatic selector switches i CGS, 2 CGS and 3 CGS via the converter 1Z to the line specified by the calling subscriber by pressing her dial D. In the example given, these selectors are those with common Group drive, but other selectors of any known type, such as rotary dials, can be used in this circuit arrangement.After switching through to the end or test selector CFS, to which the test leads of the subscriber lines are connected, the buttons CTK and CLK actuated, whereby the battery and the officer's remote receiver are placed on lines? and 3. The relay q., which bridges lines 2 and 3, responds and closes a circuit for relay 6 of the battery, normally closed contact of relay 8, right winding of relay 7, test contact and test arm of selector 3 CGS, working contact of relay 4., winding of relay 6, and through the transfer coil 9 to Er de. Relays 6 and 7 pick up. Relay 6 removes the short circuit of the right high-resistance winding from relay q. on, whereby the relay 5, which is in series with this, is prevented from responding. Relay 7 closes the circuit for the stepping magnet F of the battery via breaker i, armature and normally closed contact of relay 8, winding of magnet D and working contact of relay 7 to earth. The stepping solenoid P is energized by the interrupter and switches the switching arms of the test selector CFS over the contacts. If the participant has reached the office via the first line of his group, the officer immediately receives a buzzer tone via the following circuit from earth, the transmitter coil 9 (which is inductively coupled to the test current source CT), capacitor parallel to relay 6, working contact of the relay q., test arm and test contact of selector 3 CGS, capacitor, test arm and test contact of selector CFS, then via the test and blocking wires of the selector set by the calling subscriber to the lower working contact of the button CTK, contacts of the button CLK, remote receiver of the officer OTS and Spring and middle normally open contact of the CTK key to earth. If the participant is connected via another line in his group, the officer receives when the associated line is touched. Contact through the test arm of the selector CFS the test tone. The interrupter i is dimensioned in such a way that the switching arms of the test selector CFS remain on each contact for one to two seconds so that the officer cannot overhear the test tone transmitted to the officer. If the switching arms of the test selector CFS have reached the last contact of the line group of the subscriber, the relay 8 is energized via contact io, which is directly connected to earth. This switches off the interrupter circuit and removes the short circuit of the left high-eared winding of the relay 7 by interrupting the inner normally closed contact. The relay 6, which is in series with this, drops out and short-circuits the right high-resistance winding of the relay 4. As a result, the relay 5 receives a current of sufficient strength to attract. to be able to. Relay 5 closes the circuit for the lamp ir with its armature, which lights up and indicates to the officer that all lines of the participant have been checked.

The switching operations in the exemplary embodiment according to Figure 2 are similar. Two lines 20 and 21 of the subscriber's line group are shown here. The connection to the switchboard workstation is as shown in Fig. I. Likewise, may the setting. of the check selector CFS can be done in a known manner via any selector. A common test wire 22 is connected to contact 3 i of the test selector CFS. With this line 22 all test circuits of each of the multiple lines of the subscriber via capacitors, such as. B. 23 and 2q., Connected. After pressing the button CTK, a tone transmitted by the test current source CT is sent to a circuit that extends from earth, through the transmitter 28, capacitor 29, line 27, test arm 30 and test contact 31 of the test selector CFS, line 22, capacitor 23, test contacts and Test arms of the selector i LF and 2 LF, capacitor 25, test arm and test contact of the selector iGS, capacitor 32, spring and lower working contact of the button CTK and transfer coil 33 extends to earth. By transmitting to the secondary winding of the carrier 33, the officer hears the test tone in her telephone.

These two switching arrangements according to Fig. I and a close the; large Advantage in itself that: the test mark does not belong to your calling subscriber can be.

Claims (5)

PATENT CLAIMS: i. Circuit arrangement for telephone systems with Voting company where high-quality connections are established by female officers, characterized in that the officer in the case of multiple connections for the purpose of control the own number given by the calling subscriber a special, over Current surge receiver, longer running Hi: fsstromkreis produces, whose final selector at the same time serves as a test selector, which the multiple lines connected to it of the subscriber automatically checks. 2. Circuit arrangement according to claim i, characterized in that that the control circuit via the test leads of the test selector and the test and blocking leads the selector switch set by the calling subscriber runs. 3. Circuit arrangement according to claim i, characterized in that the officer after checking all Contacts of the contact group of the test dialer arranged for the calling subscriber automatically contains a control symbol (lamp i i):. q .. Circuit arrangement according to Claim i, characterized in that the three-phase circuit of the test selector through two relays is controlled, one of which switches on the triangle circuit while the other, after checking all multiple lines of the participant, the rotary solenoid turns off. 5. Circuit arrangement according to 'claim i, characterized in that the control: wires of all lines of the subscriber line group via capacitors are interconnected at a contact of the test selector.