DE1029049B - Circuit arrangement for telephone extension systems with dialer operation - Google Patents

Description

GERMAN

The invention relates to a circuit arrangement for telephone private branch exchanges Voter operation and facilities to be influenced by dialing numbers for assigning the function of a Main unit (night unit) to any extension.

The solution to this problem, which is known per se, was previously only possible with the help of special ones Optional devices (step-by-step switch mechanisms or relay selectors) are possible after an initial switching process can be influenced by the number assignment in such a way that the corresponding subscriber is on the public line dialer and the exchange dialer calling for incoming exchange connections to this subscriber is set. The resulting great effort for such an arrangement, after all is only a special feature in private branch exchanges, does not meet the requirements that Approach the expert with regard to the economic viability of such systems.

The invention provides a way of optionally giving up the task of assigning the function as a master any subscriber locations using as far as possible those already used for subscriber identification, in particular to solve their interconnection with trunk lines, existing facilities and thus not insignificantly increase the profitability of the systems. It consists in that after Issuance of the allocation code (night code) a switching device that in normal operation (daytime operation) under the influence (numbering) of the operating unit for connecting the desired extension subscribers serves on trunk lines, is set in readiness for admission and after receiving number bursts a corresponding position in the device connecting the trunk lines.

An exemplary embodiment of the subject matter of the invention is shown in the drawing. Not all of them immediately its explanatory devices and circuit arrangements are for simplicity and for the sake of clarity have been omitted.

At the top left, a subscriber point Tn is indicated, from which internal and external connections can be established via an internal set of call finders ^^ / line selector LW. After setting the line selector with a specific code number (night code number), the subscriber is connected to an arrangement NZ referred to as the night addition. In terms of circuitry, the night add-on is coupled to the so-called MRK marker, which in normal daytime traffic is the aid for operation in the exchange to connect subscribers of the private branch exchange with exchange lines

for telephone exchange systems

with voter operation

Applicant:

German Telephony Works

and Kabelindustrie Aktiengesellschaft,

Berlin SO 36, Zeughofstr. 4-11

Christian Lettre, Berlin-Lichtenrade,
has been named as the inventor

switch. Essential parts of the marker are voters, either stepping mechanisms or relay arrangements, which, after being influenced by dialing the number (with a numeric transmitter or dial), issue such markings that an incoming office dialer is stopped when it has reached the connection of the selected subscriber. The marker’s pulse relay is marked /. During normal daytime operation via line PL, it is influenced by the night-time add-on NZ after the switch to night-time operation.

According to the invention, the devices of the marker are used to subscribe to the To switch the private branch exchange as a night switch or to change the night switch, so that after pressing the night switch certain subscriber stations optionally the task of loading. service and monitoring body can be assigned. The selection of participants for the exercise In addition to the operator, the night switching activity should only be carried out by a few authorized extension participants be made possible. Your connecting lines are specially designed as in each A rectifier that can be bridged by a relay operated by the night switch is arranged on its wires. First of all, consider the processes that occur when the night changeover is carried out from the operator station of the private branch exchange.

By flipping the night switch at the workplace, contacts 31JV GS and iONGS are closed. The relay GS is over the latter switched 1, gs present at its contact 5OG J-1 via contact 46 potential at which the permanent night point ISIN

809 508/117

Signing contact in the contact bank of the test arm e of the exchange dialer AW switches on: The exchange dialer set in motion when an exchange connection comes in thus stops when the connection line of the permanent night position is reached. (Of course, several subscriber stations can also be marked as permanent eighth digits in the exchange dialer.) Ringer current is sent out via additional switching arms of the exchange dialer, which are not shown, and after lifting the dialing signal is transmitted, which arrives inductively on windings I and II of relay A and thus to the operator station. With Kontakt39el the transmission of the dialing impulses to the marker is prepared. A circuit for the marker relay B1 , which controls its assignment and other preparatory processes, is closed by Kontakt43el via contacts 44/1 and 47 ί 4. The exchange now sends the number of the night

of the handset, the speaking connection with the local office of the subscriber to be switched is appropriate

participants made.

^{If the exchange wants to switch an extension other than N T} eight position instead of the permanent night position, an internal connection set ASI LW is occupied after actuation of the connection button (not shown). The dialing character is transmitted from the line selector. After actuating the night switch (closing contact 31 NGS) and setting the line selector according to the night code, the following circuit is established for relay F :

Earth, contacts not shown, winding of relay F, switching arm c of the line selector, contacts 24fr, 25el, 27c '. Winding of relay C or low resistance WiI. Contact 29 ", contact 31 .VCS", resistance "72, minus.

Relay C does not respond in this circuit. The relay / · "switches off with contacts 3 / and 4 / current impulse series. They are picked up by relay A and transmitted to the pulse relay / of the marker:

Earth, contacts 38/1, 39el. 41 o. Winding of the relay /, minus. ^:

The pulse relay / is. As already mentioned, the same relay that is influenced in daytime operation by the operator station via line PL for setting the marker. It acts on counting chains, for example relay chains, in such a way that, at the end of the impulse, certain links in the chains in the contact field of the exchange dialer identify the position corresponding to the selected extension subscriber (by a certain potential). The identification members of the marker are not shown. It is only shown that on different contacts 53 rwl, 54 / Tt'2, 55ra'3 different positions in the contact bank of the switching arm e of the official

the speech wires of the internal set through, so that the selector ₃₀ are turned on for the purpose of the office responsive relay A:

Earth, winding II of relay A, contact 8 c, switch arm b of the line selector, contact 4 /. Switching arm b of the caller, loop running over the control point. Switching arm a of the caller, contact 3 /, switching arm α of the line selector. Contact 6c. Winding I of relay A, minus.

After opening the contact 29 «, the relay C responds, which interrupts the above-mentioned circuit for relay A through the contacts 6c and 8c and turns on the windings I and II of the relay B at the contacts 5c and 7c with reversed potential. To shut down the voter on one or the other contact. After the series of impulses has been emitted, a relay 74 is switched on to mark the end of the selection in the marker, which switches on relay P of the marker with contact 48ί4. By closing the contact 51 ρ the relay Fl is energized in the night add-on:

Minus, resistance Wi2, contact 31NGS of the A ^T eight switch, winding of the relay / '"!, contacts 36el. 51p, contacts not shown, earth.

The relay / "" 1 provides for the relay P of the marker with contact 45/1 an independent from the relay Cl

Relay A does not drop out. but holds on to its 45 pending electric circuit. The control point is

Winding III and the contacts 17 c and 16 a. The control point is switched in such a way that relay B cannot respond. The following circuit is established for relay Cl :

Earth, contacts 13c. 12 / », 9/1, winding I of relay Cl, minus.

When relay C is switched off by contact 25c 1, the following holding circuit for relay Cl is closed via contact 26el:

Earth, contacts not shown, winding of relay F, switching arm c of the line selector. Contacts 24ir. 26el, winding II of relay Cl (the shunt via resistor ίί'ι'3 is open through contact 28), minus.

When relay C drops out , relay B (windings I and II) is switched off and the previous state is restored by switching on relay A (windings I and II). The holding circuit for relay A. Winding III is interrupted by contact 17e. This winding is now over

WZ, contacts 23c, 22/1, Co, contact 18c 1st winding III of relay A, minus now transmit a buzzer signal:

Minus, winding III of relay A, contact 18el, capacitor Co, contact 21/1, Su.

The buzzer indicates that the marker has made the identification on the exchange dialer, ie that the dialed extension is marked as night station in the exchange dialer. With contact 42/1 the relay GS is switched on, that with contact 46g ·.? switches off the contact identifying the permanent night position in contact bank c of the public dialer. The operator station then disconnects itself from the connection set. As a result, the relay A drops out, which by producing a shunt via the low-resistance WiZ and contact 28a

the relay Cl brings to waste. The circuit for relay Fl remains in place:

Minus. Resistance Wi2, contact 3IiV GS of the night switch, winding of ReIaJsZ ⁷ I, contacts 35el. 33c, 37/1. Earth.

The relay that switches off the permanent eighth digit (7.S 'remains energized (via contact 42/1), and the energization state for relay P in the marker is maintained (via, contacts 45/1 and 48? 4), so that the

Mark the contacts of those relays that identify the subscriber selected as the eighth position, activated stay.

In addition to the exchange, special authorized subscribers should have the right to switch any extension as a night switch or, if necessary, to change the night switch. In contrast to normal subscriber stations, the connecting wires of such authorized subscribers are designed in such a way that rectifiers G / 1 and G / 2 are located in them, which are short-circuited during normal day-to-day operations. Only when the relay G.S'l is switched on after actuation of the night switch and the contacts 1 gs 1 and 2gs 1 are open, the rectifiers are effectively in the connection wires. After selecting the night code and setting the line selector, a loop circuit for the two windings I and II of relay A is created in a similar way as before. The direction of the current in this circuit is such that the rectifiers have continuity. \ ^T ah operation of the relay G are as described above, briefly, the two windings I and II of the relay B is turned on with reversed Stromrichtuug. Since the rectifiers are now impermeable, the relay B cannot respond, so that the relay G, which is immediately thrown off by the relay Gl, restores the original circuit via relay A.

If an unauthorized subscriber dials the night code - such subscribers lack the rectifier and the gs 1 contacts in the connection wires - the circuit for relay A is also established. After switching over the contacts 5c and 7c, the relay B responds in the unlocked loop. The result is the following circuit for relay T / e:

Earth. Contacts 13c, 11 / ;. Winding of the relay TR, minus.

The relay TR opens the contact 24 ir and thus a place in the c-wire coming from the line selector. This is the signal for triggering the from the unauthorized subscriber to the night add-on XT. established connection path.

Attempts of this kind on the part of unauthorized participants have no effect on the night add-on that has already been set, since a backup current circuit is closed for the relay / '1 that characterizes this state while the relays C and Ii are energized via contacts 34 b and 32 c (the contact unit failure times are compensated by the all-case delay of the relay Fl ). The marker is kept set (via contact 45/1) so that the night switch is not disturbed.

If this task is to be assigned to another participant instead of a participant who is connected as an eighth position, this is only possible for the authorized participant. If the night code is dialed for this purpose at an authorized extension after lifting the receiver, relay A responds in the manner described, which causes relay C to be switched on. Since relay B does not respond, the holding circuit for relay / ⁷ I is interrupted after contact 33c is opened. The marker relay P is switched off by contact 45/1. This is brought into the rest position with its identification devices, whereupon the nn-iit shown relay Γ4 drops out. Via contact 47i4 in the marker and contacts 44/1, 43cl in the night add-on (relay Gl was switched on via contacts 13c, 12b and 9/1), the marker is reassigned by switching on relay B1. Thus, the identification of the subscriber previously switched as the night station is canceled, and any other subscriber can now be switched as the night station in the manner described.

It is also possible for the authorized participants to switch themselves as a night station. The operations this does not require any further explanations, as this differs from the processes shown nothing changes.

If you want to switch back to daytime operation, only the night switch is put into the rest position. As a result, the relay F1 drops out, so that the marker is brought to the rest position in the manner mentioned and thus any subscriber identification, including the one for the permanent night digit (relay GSL dropped out) on the exchange dialer, is canceled. After opening the night switch, it is not possible to use the night add-on. The marker is completely switched off from the night additive, so that it can be used in the usual way for daytime operation without being influenced by it.

It is also possible for the authorized stations to switch from a specific subscriber station switched as a night station to the normally fixed night station (permanent night station). For this purpose it is only necessary to send out the night code, whereby, as described, relay Fl to waste and thus the marker is released, so that the special identifications on the exchange dialer are canceled. Since relay GS is switched off by contact 42/1, but relay GSl remains energized when the night switch is actuated, the contact that characterizes the permanent night digit is switched on in the exchange dialer via contacts 46 ^ .9 and 50 ^ iI.

It is of course also possible to switch unauthorized participants as a night station, but is the creation and removal of this state is also only possible for authorized participants.

Claims (9)

Patent claims: 1. Circuit arrangement for telephone extension systems with dialer operation and devices to be influenced by dialing the number for allocating the function of a main station (night station) to any extension, characterized in that after the allocation code has been issued (night code) a marking device (MRK), which in normal operation (daytime operation ) is used under the influence (numbering) of the operator to connect desired extension subscribers to exchange lines, is set in readiness for reception and, after receiving number current surges, marks a corresponding position in the exchange line connecting device (AW) . 2. Circuit arrangement according to claim 1, characterized in that in a device (night add-on XZ) that is occupied after the night code has been issued, switching means (Gl) are effective, which in normal daytime operation is also under the influence of the control point, the pulse relay (/) of the marking device to the Switch on the impulse contact (41 α) of the impulse relay (A) of the night add-on. 3. Circuit arrangement according to claim 1 and 2, characterized in that after the transmission of the a subscriber station to be identified as a night station corresponding series of current impulses switching middle (Fl) of the night add-on for the duration of the night service or until switching processes are initiated to change the night service, keep the marking device (through relay P) in the set position. 4. A circuit arrangement according to claim 3, characterized in that after the transmission of the current impulse series corresponding to a subscriber station to be identified as a night station, a signal (Su) indicating the completed setting of the marking device is transmitted from the initiating station. 5. Circuit arrangement according to claim 1, characterized in that the device reached after the night code has been sent (night add-on XZ) is assigned a switching means (B) which checks the authority initiating the night service for its authorization to determine the night position. 6. Circuit arrangement according to claim 5, characterized in that the subscriber stations authorized to determine the night position are assigned valve cells (GIl, Gl 2) which prevent the test switching means (B) from responding in the night additive and thus prevent the connection path established to it from being triggered. 7. Circuit arrangement according to claim 6, characterized in that after controlling the Night additive briefly the potentials in the speech arteries are swapped and thereby the Loop current is checked for continued existence or blocking by the valve cells. 8. Circuit arrangement according to claim 3, characterized in that after setting the marking device (relay F 1 energized) switching means (GS) are switched on, which after actuation of the night switch in the exchange as a night station (permanent night station) on the office dialer (AlV) marked point (or places) switch off. 9. Circuit arrangement according to claim 3 and 8, characterized in that after control of the Switching means (C) assigned to it during the night trigger the set marking device cause it to be ready to receive for renewed setting and at the same time again the Bring the status of the connection of the permanent night point or points. Considered publications:
German interpretative document No. 1 005 571. 1 sheet of drawings © »09 508/117 +.