DE648349C - Circuit arrangement for telecommunication, especially telephone systems with several AEmtern in series - Google Patents

Description

The present invention relates to a circuit arrangement for telecommunications, in particular telephone systems with several offices in a row. 'She has the The task of running such systems as smoothly and economically as possible to ensure. That is what we must strive for, especially when the individual Offices for long, high-quality leadership

10, lines are connected to one another, as is the case, for example, in so-called self-dialing long-distance traffic is the case across several offices or network groups, in the savings Civil servants' existing advantage of this traffic does not become obsolete to ensure that the high-quality connecting lines are occupied for an unnecessarily long time. This can happen because the calling subscriber, if he is busy when establishing a connection Lines or the called subscriber does not answer, does not release the connection, Instead, it waits for a long time until the lines become free or the desired subscriber answers. However, the high-quality connecting cables are allowed to wait with such waiting times not be charged. In this case you must rather - after a short time Time to be released again.

It has already become known to avoid unnecessarily long occupancy of lines when the line is busy by subscribers connected to a sub-office Connection devices of the sub-office as well as the connecting lines leading to the sub-office to trigger again immediately.

Furthermore, it has already become known "at a certain point on the connecting route To connect auxiliary officers to a line in order to notify the calling participant to do if the called subscriber does not answer. In a similar way it is already known for telegraph systems, if the desired subscriber station is occupied, in their place in the last office reached an office apparatus to the established Activate the connection so that the calling subscriber can send his telegram to this device.

The - the former arrangement has the disadvantage that when you call the desired Participant this can be occupied again, so again a connection line is unnecessarily occupied.

In the case of the last-mentioned known arrangements, it can happen that the connection just got through to an office in which no official apparatus or no auxiliary officer is planned or the latter is not present. This is particularly true in the case of systems with several offices in a row, in which individual offices that at

*.) ■ From the patent payer the following has been indicated as the inventor:

Dr. Frits Lubberger in Berlin-Grunewald.

to connect an auxiliary officer to give the calling participant information would be suitable, not at all or only partially. rend occupied a certain time of the day ^ are. V £: -v

Finally orders are still knownHJ become, in which an '' auxiliary officer is provided in each office. These arrangements but have the disadvantage that the officers can only make connections that are in their own office to end.

In contrast, the invention always connects auxiliary officers to the established connection at a suitable point on the connection path in order to provide information to the calling subscribers or to receive their request. According to the invention, this is achieved in that facilities are provided in the individual offices, of which a facility is optionally identified in any office by a special switching measure as to be used and, if a connection established to a subscriber of this or another office is unsuccessful, according to a specific one Time is automatically brought into effect in order to switch on a signal and thereby cause the entry of an auxiliary officer. The accompanying drawing illustrates an embodiment of the invention. There are shown only the information needed to \ ^r fore sub ject of the invention, circuit details. N ₁ is a calling station, for example a subscriber station or a remote officer, who via the preselector VW, the group selector GfF ₁ in the office VSt ₁ , the long- distance line FL ₁ , group selector GfF ₂ in the office VSu, the long- distance line FL ₂ , the group selector Gf- F ₃ in the office FSf ₃ , the trunk line FL ₃ and the line _{selector LfF 4} in the office FSi _{4 establishes} a connection to the subscriber Y ₄ . Of course, in addition to the single electoral level shown, several electoral levels can be arranged in the individual offices. The end office VSt ₁ is an office that is only manually operated during the day for outgoing connections. The incoming connections via the long-distance line FL _S are established by dialing a number on the part of the calling station. To establish a connection, the subscriber station N ₁ dials a specific code number. It is initially assumed that the connection comes _{through to the called subscriber Y 4} without encountering busy lines, the called subscriber Y ₄ is also free.

When the connection is initiated, the FIF preselector is activated in a known manner and set to a free group selector GIF ₁ . After setting the preselector FfF, the bridge relay A ₁ j; än speaks over the closed loop at ■ the calling station N _1. Relay A ₁ closes its contact 2a, and -ij & x thereby sets the delay relay V ₁ . ^ JM of the first series of impulses, the partial loop is alternately opened and closed, the relay A ₁ oscillates, it opens and closes its contacts 2 O ₁ and Ia ₁ alternately; the ReIaIsS ₁ is excited via the contacts ι W ₁ and 3 V _1. The first series of impulses causes the group selector to be raised to the desired decade in a known manner; the group voter then turns freely to a free line. The FL ₁ pipeline may be one of these. Earth contacts 10 _1, 3 V _1, winding of the relay S _1, battery, ground, the relay S ₁ energized;: the second impulse series is again intermittently over Relay F ₁ acts as a delay relay during the series of impulses. Relay S ₁ alternately applies the alternating current source WQ ₁ to the two speech wires via its contacts 9J ₁ and 1Oi ₁ and, after the group selector GfF _{1 has been set as} required, excites via the wires of the long- distance line FL ₁ and contacts 24 ^ 2 and 27 ^ 2 the AC relay J ₂ in the office FSi ₂ .

Here, with the first current surge of this series of current pulses, which also serves as an occupancy, current surge, relay F _{2 is} excited in the following circuits: Earth, contacts 18 i ₂ , i5g- ₂ > winding of relay F ₂ , contacts 14Z ₂ , 17 ^ ₂ , Resistance fFi ₂ , battery, earth. The relay F ₂ remains independent of the relay J ₂ via its contact 13 / g . After opening contact 14/2, relay G ₂ responds in the following circuits: 100. Earth, contact 13/2, winding of relay F ₂ , winding of relay G ₂ , resistor Wi ₂ , battery, earth. By the subsequent current pulses, the relay F ₂ via earth contacts i8t _2, 16 g of ₂ short-circuited intermittently; however, the shorts are not long enough to cause relay F ₂ to drop out. The group selector GfF ₂ is set in a known manner to the desired decade by this series of current impulses, whereupon it selects a free line FL _2. The test relay F ₂ speaks via the switching arm c and stops the voter. The switching operations for setting the group selector GfF ₂ are irrelevant to the invention and are therefore not shown. In the case of the third series of impulses, relay A ₁ in office FSi ₁ oscillates again and thereby energizes relay J ₂ in office VSt ₂ intermittently. This closes its two contacts 302 and 31 i ₂ and thereby applies the alternating current source fFQ ₂ to the line FL ₂

at. In the office VSt ₃ , the AC relay / _{3 is} excited via the two speech wires of the line FL ₂ and the contacts 43 e ₃ and 46 ^ _3. Relay / ₃ includes the first current pulse, which again serves as an occupancy rush current, the following circuit for the relay F _3: earth contacts 37 ^ _3, 33§ _"3, winding of the relay F _3, contacts _35/3, 36 g _a, resistance wi _3, battery, earth the relay F ₃ maintains itself via its contact _32/3 independently of the relay / g After the opening of the contact 35 f _3, the relay g is energized in the following circuits. _3:. earth Kontakj: 32 ^ ₃ , winding of relay F ₃ , winding of relay G ₃ , resistance Wi ₃ , battery, earth. The subsequent current surges _{short-circuit relay F 3} via contacts 371 ₈ and 34 ^ 3. However, it does not drop during the series of current surges As a result of this series of current impulses, the group selector GW _{3 is raised} to the desired decade in a known way, whereupon it selects a free line FL _3.

In the fourth series of impulses, relay A ₁ oscillates in office VSt ₁ and alternately energizes relay .SV. Relay S ₁ transmits the current impulses as alternating current impulses to relay J ₂ in office VSt ₂ . Relay J ₂ forwards the current impulses in turn as alternating current impulses via line FL ₃ and again energizes relay J _{3 in the} VSt _{3 office} . Relay J ₃ specifies by closing its two contacts 48 i _a and 49 _s i the AC power source WQ ₃ to the two speech wires of the line FL ₃ and excited via the contacts 62 e ₄ and 65 e _4, lying in a bridge to the speech wires AC relay J ₄ in the final office F-SY ₄ . This series of current impulses raises the line selector to the desired decade in a familiar manner. The switching processes for this are not shown. With the first current surge, the following circuit is formed for the occupancy relay F ₄ : Earth, contacts 5Oi ₄ , 52g- ₄ , winding of the relay

«F ₄ , contacts 54 / ^, 55 ^ ₄ , resistance Wi ₁ , battery, earth. The relay F ₄ is connected to a holding circuit independent of the relay / ₄ via its contact 5If _4. After opening the contact ₅₄ quarters the relay G is energized in the following circuits _4: earth contact 51 ^ 4, winding of the relay F _4, winding of the relay G _4, resistance Wi _4, battery, earth. During the current surge series, the relay F ₄ is short-circuited via: earth, contacts 56I ₄ , 53 ^ 4, but it does not drop because it is designed as a delay relay. The next series of current impulses, which is transmitted from the relay J ₄ to the rotary magnet of the line selector, is turned to the desired subscriber line. The current flows for this are not shown. Since the subscriber JV ₄ , as assumed, is free, speaks after the line selector has checked the subscriber line, a Rufanschalterelais L (not shown) via an interrupter and alternately applies the ringing current source WQi via its contacts 67I ₄ and 68 Z ₄ to the called subscriber line. The subscriber JV ₄ takes off, so the ringing pauses in talking over the closed subscriber loop, and the contacts 66 to Z ₄ and Z 69 _4, the feeding bridge relay Bi. The relay F ₄ transmits the signal that the called subscriber has been hung up in the following way backwards to the office VSt ₁ : Relay E _{1 temporarily closes its contacts 63 ^ 4} and 64 ^ ₄ in a way that is not of further interest here and thereby sends an alternating current surge from the alternating current source WR ₄ , backwards over the two wires of the line FL ₃ , the switching arms α and b of the group selector GfF ₃ , the contacts 47 J ₃ and SOi ₃ to the AC relay E ₃ . The relay E ₃ responds and closes its contacts 44 e _s and 45 ^ ₃ . The alternating current source WR ₃ sends a current surge backwards via the two wires of the line FL ₂ , the switching arms α and b of the group selector GW ₂ , the contacts 28 i ₂ and 29 i ₂ back to the alternating current relay E ₂ . The relay E ₂ responds, it closes its two contacts 25 ^ ₂ and 26 e ₂ and thereby applies the alternating current source WR ₂ to the line Fu ₁ . An alternating current surge runs over the two wires of this line, the switching arms α and b of the group selector GW ₁ , the contacts 8 J ₁ and IiS ₁ to the alternating current relay E ₁ . The relay E ₁ switches, if the calling station is a subscriber station, a time zone set or, if the calling station is a remote official, extinguishes a monitoring lamp at the remote station.

When triggered, the 'loop is _{interrupted at the calling StClIeJV 1} , the * ° 5 relay A ₁ in the office VSt ₁ drops out. Since the relay V _{1 is} heavily delayed, the relay S ₁ responds for a relatively long time and sends a long alternating current surge to the alternating current receiving relay J ₂ in the office VSt _{2 via its two contacts 9J 1} and 10.%. Relay J ₂ is energized for a long time. It short-circuits the occupancy relay F ₂ for a longer period of time via contacts 18 i ₂ and 16 g ₂ , so that it falls off. This initiates the release of the connection devices in the VSt _{2 office.} When the relay J ₂ is excited by the long trigger current surge, _{a long alternating current surge is also sent via the contacts 3Oi 2} and 314 via the line FL ₂ to the relay / ₃ in the KSY ₃ office. The relay J ₃ closes via the contacts 37 i _s

(548340

and 34 ^ 3 the occupancy relay .F ₃ briefly for a long time and brings this to waste. This initiates the release of the connection devices in the VSt _{3 office.} Furthermore, the relay / ₃ sends a long alternating current surge to the relay J ₄ in the office _{FSt 4} , via its contacts 48 i ₃ and 49 7 * 3. Relay J ₄ shorts the occupancy _{relay F 4} for a longer period of time via contacts 56 f ₄ and 53 § ₄ , thereby causing it to drop out. Relay F ₄ initiates the triggering of the line selector LfF _{4 in} a known manner.

It is now assumed that the called subscriber N ₄ is busy or does not answer. In this case, care must be taken to ensure that after a short time, after about 30 ", an officer is switched on in the office FSt _{4, which is initially located for the called subscriber, in order to receive the wishes of the calling subscriber} FSt _4, the T key ₄₁ and pressed D _42. Upon arrival the Nümmernstromstöße, the two relays F ₄ and G ₄ About were as described energized. the contact _51/4 after closing the T key ₄₁ of the following circuit for the thermal relay Z ₄ closed: earth contacts _51/4, 59W _4, T key _41, thermal relay Z ₄ battery, earth If the subscriber within the response time of the thermal relay Z _4, which should be about 30 "apart, as is the contact 61st e _{4 of} the feed bridge relay E _{4, the} following circuit is formed for the relay M ₄ : earth, contact 61 e ₄ , button T ₄₂ , winding of the relay M ₄ , battery, earth. The relay M ₄ opens its contact 59 W ₄ and thereby interrupts the circuit for the thermal _{relay Z 4} , so that it cools down again and its contact 58S ₄ does not close. Via the contact 60 Mi ₄ , a holding circuit for the relay M _{4 is} closed, which is independent of the feed bridge relay E ₄ and can only be interrupted when _{the relay F 4 drops out when triggered.} If, however, the subscriber N ₄ does not answer within the response time of the thermal relay Z ₄ , the contact 58 S _{4 is} closed and the signal lamp La _{4 is} switched on as a result. The appearance of this signal prompts an officer to enter the existing connection via an interrogation switch. This can be done in any way not shown here. The further treatment of the connection takes place in some manner not of further interest here; so z. B. the officer can accept an order from the calling participant, which the officer later awards the called participant, or the officer can, if necessary, send a messenger with a message from the calling participant to the called participant.

The connection of the auxiliary officer in the office VSr ₄ is only possible during the day. Since the office is not manned at night, switching on signals during this time is pointless, and it must be ensured that an officer in the nearest manually operated office is induced to enter the connection in such a case. For this purpose, when the office VSt ₄ closes, the keys T ₃₁ and T ₈ in the office _{FSt 3} are pressed. It is of course also possible to provide devices which _{bring about the closing of the key contacts T 31} and T ₃₂ as a function of a switching action by the officer in the office VSt ₄ when leaving her place. This officer influences a relay, for example via a wire of the line FL ₃ and a glow lamp arranged in the office VSt ₃ , which causes the key contacts T ₃₁ and T _{32 to close.}

Since when the group selector GW _{3 was assigned} the relay F ₃ in the office VSt _{3 was} energized, the following circuit for the thermal _{relay Z 3 is} closed after pressing the T ₃₁ button: Earth, contacts 32/3, 40 W ₃ , button contact T ₃₁ , thermal relay Z ₈ , battery, earth. If the participant N ₄ does not pick up within the response time of the thermal relay Z ₃ , the contact 39 ^ 3 is closed and the signal lamp La _{3 is} switched on. At this signal, an officer in Office FSt ₃ joins the connection. Since it may also be desirable in this case to release the long-distance line FL ₃ , when the thermal relay Z ₃ responds, the occupancy relay F _{3 is} short-circuited via: toc earth, contacts 38 ^ ₃ , 34 ^ ₃ . The relay F ₃ drops out and thus initiates the triggering of both the group selector GW ₃ and the subsequent connection devices.

If you want to switch on a signal in the offices VSt ₂ ^and FSi ₁ , which causes the entry of an auxiliary officer, the buttons T ₂₁ , T _{22 in the office F ^ i 2} and the buttons T ₁₁ and T ₁₂ in the office VSt _{1 must be} closed will. In the office VSt ₂ , after the key T _{21 is} closed, a circuit for the thermal relay TH _{2 is} closed, which switches on a signal lamp La ₂ via its contact 23 ^ ₂ if the subscriber N ₄ does not respond within the response time of the thermal relay. On the other hand, if the participant picks up before this time, relay E _{2 is} briefly energized, which energizes relay M ₂ via: earth, contact 22 e ₂ , button T ₂₂ , winding of relay M ₂ , battery, earth. Relay M ₂ opens his. Contact 2ow ₂ and thereby interrupts the heating _{circuit for relay Z 2} .

About his contact 21W ₂ relay M ₂ is maintained regardless of relay E ₂ to trip. In the office VSt ₁ , after the key T _{11 is closed,} a circuit for the thermal relay Z _{1 is} formed: earth, contacts 4V ₁ , Sm ₁ , key T ₁₁ , thermal relay Z ₁ , battery, earth. If the subscriber does not respond within the response time of relay Z ₁ , the signal lamp La _{1 is} switched on via contact 12, S ₁ , which causes an officer to enter the connection. However, if the participant reports in time, relay E ₁ and thus ReIaJsM _{1 is} energized in the following circuits:

Earth, contact 7 C ₁ , button T ₁₂ , winding of relay M ₁ , battery, earth. The relay M ₁ interrupts the circuit for the thermal _{relay Z 1} through its contact 57% and places itself in a holding circuit independent of the relay E ₁ via its contact Ow ₁ , which is only interrupted when the connection is triggered by the calling station.

In order to create the possibility that the signal lamp La _{1 is} switched on first, so that an officer close to the calling subscriber enters the connection first, only the response time of the thermal relay Z _{1 has} to be set up for a shorter time than that of the thermal relays in the rest Offices. For example, the response time of the thermal relay Z _{1 can be} 25 seconds compared to a response time of 30 seconds for the thermal relays in the other offices. The arrangement can be made so that the entire connection from the office FJTi ₁ to the subscriber JV _{-1 is} triggered as soon as the thermal _{relay Z 1} responds. The arrangement can also be made in such a way that the connection remains, so that after the civil servant enters another office, e.g. in FJTf ₃ , an understanding between the calling participant, the civil servant in office VSt ₁ and the civil servant in Amte VSt _{3 is} possible.

A connection running over several offices can also encounter busy lines in the connection path, ie all connection lines continuing in one direction, e.g. B. the connecting lines FL ₂ that can be reached via the group selector GW ₂ are all occupied. In this case, it is advisable to display the overload condition, even without preparation for switching on the signals. A solution for this is shown in Amte FJTi ₂ . If the selector GW ₂ does not find a free line FL ₂ , it runs over all outputs into a spinning position marked 11 and via this position excites the signal lamp La ₂ : earth, winding of the test relay P ₂ , switching arm c of the group selector GJf ₂ , spinning position '11, signal lamp La ₂ , battery, earth. The appearance of this signal also triggers the entry of an officer into the connection.

It should be pointed out that the present arrangement can be inserted into any long-distance dialing system with direct dialing on the part of the calling subscriber to the called subscriber without significant changes; because in every system of this type, surge receiving relays (Z ₁ to / ₄ ) and hang- up monitoring relays E _{1 to} E _{4 are} provided. The introduction of the arrangement according to the invention only requires the addition of a contact for the off-hook monitoring relays in the various offices. In office VSt ₁ the relay E has ₁ to a further contact 7 ^ _1, in office VSt _2, the relay E ₂ with a further contact 22 e _2, in office VSt _3, the relay Jj ₃ with a further contact 42 e _s, in Office VSt ₄ the relay E _{1 can be provided} with another contact 6r e ₄ . If it is no longer possible to load the feedback relay with another contact, you only need to switch on a new relay in the circuit of the signal sources WR ₂ , WR _{3 , WR 4} , which responds in the feedback circuit and takes the place of relays JS ₁ to E. ₄ the relays M ₁ , M ₂ , M ₃ , M _{4 are} energized.

Claims (10)

Patent claims: 1. Circuit arrangement for telecommunications, in particular telephone systems with several offices in series and facilities provided in the offices for receiving messages in the event of unsuccessful connections, characterized in that in the individual offices each facilities (Z ₁ , Ai ₁ or Z ₂ , M ₂ or Z ₃ , Af ₃ or Z ₄ , - Af ₄ ): provided io *, of which a device (e.g. Z ₁ , Af ₁ ) can be selected in any office by a special switching measure as to and if a connection established to a subscriber of this or another office is unsuccessful, it is automatically activated after a certain time in order to switch on a signal and thereby cause an auxiliary officer to enter. 2. Circuit arrangement according to claim i, characterized in that the identification ^ of the devices (Z ₁ to Z ₄ , 7If ₁ to Af ₄ ) in the offices by manually operated switching means (buttons T ₁₁ , Ta, T ₂₁ , T ₂₂ , etc.) he follows. 3 · Circuit arrangement according to claim ι, characterized in that the devices which switch on the signals or the signals themselves (La ₂ ) are switched on automatically in a state of the continuing lines which does not allow a call to be conducted (e.g. all lines in one direction are busy).
4. Circuit arrangement according to claim i, characterized in that the identification of the facilities in one office (e.g. l'St _s ) takes place as a function of a switching measure in another office (e.g. VSt ^) . 5. Circuit arrangement according to claim i, characterized in that the devices _{contain time switches (Z 1} to Z ₄ ) which are switched on when the connection devices located at the incoming end of the connecting lines are occupied and, in the case of connections that do not lead to calls, a signal lamp ( Switch on La ₁ to La ₄ ). 6. Circuit arrangement according to claim i, characterized in that the devices contain switching means (M ₁ bis.M ₄ ) which prevent the switching on of the signal lamps when a call is established within the response time of the timers (Z ₁ to Z _4). 7. Circuit arrangement according to claim 6, characterized in that the switching means (M ₁ to M ₄ ) are switched on by relays (E ₁ to E ₄ ) influenced when the desired subscriber is unhooked. 8. Circuit arrangement according to claim 5, characterized in that the time switching devices (Z ₁ , Z ₃ ) come into effect in different offices after different times (in VSt ₁ faster than in VSt ₃ ). 9. Circuit arrangement according to claim 5, characterized in that the Time switching devices (Z) triggering the connection paths after the switched on Time switching device cause connecting devices lying. 10. Circuit arrangement according to claim 5 and 7, characterized in that the devices (Z ₁ to Z ₄ , M ₁ to M ₄ ) are operated via local circuits, which are only available in systems with connections extending over several offices in itself current surge receiving relay (J ₁ to J ₄ ) and off-hook monitoring relays (E ₁ to E ₄ ). 1 sheet of drawings