DE723814C - Circuit arrangement in telecommunications systems, in particular telephone systems, for selectors that can be set in two directions of movement by two successive series of current impulses, in particular rotary dials - Google Patents

Description

Circuit arrangement in telecommunications systems, in particular telephone systems, for adjustable in two directions of movement by two successive series of impulses Selector, in particular rotary dial The invention relates to a circuit for telecommunication systems, especially telephone systems, with rotary dials.

With such systems it is sometimes necessary to adjust the of the lever-operated rotary selector, for example to identify another selector on - to control the same or equivalent setting. Such arrangements are often necessary for command and remote control systems, if one Feedback made or the correct setting of a first voter should be checked again before a command is carried out completely.

The application of the inventive concept offers particular advantages Telephone systems, especially in the case of private branch exchanges, in which an automatic Transfer of outside calls without the assistance of an operator is provided. Such an assignment is often carried out in such a way that the person speaking with the office Extension calls the desired other extension in consultation. The one to connect with the trunk dialer will be serving. here then to carry out the assignment on, the line of the desired other extension is redirected. Here, too, results the need to recruit the desired second participant of a rotary dial to identify another rotary dial (the office dialer) to be able to adjust to the same line. Circuits for making such call transfers by redirecting the exchange dialer to one via one Lines marked lZ1, ücl <question connection are already known per se.

As far as only simple ones as an office dialer in these known circuits Rotary selectors are used, these arrangements serve their purpose; they fail However, once also these voters with regard to the size of the facility or from must be carried out for reasons other than lever dial. A well-known arrangement for this case has the disadvantage that the existing for the outgoing traffic The office distributor is also used to carry out the transfer. As a result of addiction however, there is a blockage of outgoing official traffic from a common body during the assignment.

There is also an arrangement known in which a lever as a rotary selector trained public office dialer on one by a rotary dial of a house connection set marked connection line has to be set if the subscriber by choice the outside line code expresses his will to establish an outside line connection brought.

With this arrangement, the rotary selector of the house set is equipped with 5 switching arms, of which a are used for the identification circuits. This arrangement has the disadvantage that not only do the rotary dials take up a considerable amount of space due to the 5 sets of contacts required, but also the multiple cable that has to be looped through the entire system is much stronger than with a three-wire rotary dial, because in addition to the normal a b c-cores two more cores must be provided for each connection point.

The invention also uses rotary dials for the house and Official clauses, but shows a significant simplification compared to the last mentioned Arrangement because with her the two switching elements of the selector for the identification take up comparatively much less space and the multiple cable contains significantly fewer veins. The invention accomplishes this using known rotary dials in which a pair of additional switching elements is present, one of which only in one direction and the other is moved in the other direction, by the fact that a voice selector of a traffic direction, z. B. Office, on a line is controlled by the combination of the setting both identifying elements of a voice selector, each movable in one direction only, preferably rotary dial, another traffic direction, z. B. House, designated will.

An embodiment of the invention is illustrated below with reference to FIG Illustrations described in more detail.

A private branch exchange based on the ioooer Spstein was used as an exemplary embodiment accepted.

The basic connection setup of a private branch exchange is shown in fig. For home traffic, the connection paths from call seekers are used AS, group voters GW and line voters Lit, 'exist. Be about these ways The consultation calls are also handled in a known manner. The line selector Lf ' are also used for incoming public calls and for transferred public calls shared. The trunk lines end on trunk transferors A-Ue, to whom trunk voters Abi ' are permanently assigned. Zoo-part rotary dials are used for the office dialers, who work with arm switching, with one contact group for the outgoing, the other contact group for incoming exchange calls and for transferred calls serves.

For outgoing exchange, the participants are divided into groups (three groups are shown in Fig. I), so that in this case each participant can only reach one free exchange line in his group. In incoming exchange traffic, the ATY serves as a group selector, via which a free Lii 'of the desired subscriber group is selected. When transferring, the relevant AW is controlled via the same switch arm set to the LW that is used in the consultation connection. The AS-GW used in the inquiry connection is then triggered.

In Fig.3 and d. the relays of the AS-GW set are identified by the additional letter g, those of the LW by the additional letter L. i. House traffic If the subscriber lifts the handset, then speaks via the direct current loop created in the subscriber circuit RI (Fig. 2). As a result, the AS (Fig. 3) of a free connection path is stimulated in a known and not shown way to adjust to the calling subscriber line. In this connection path, a not shown occupancy relay Bg responds, which applies its contact bg and vag = the relay flg II as a test relay to the c-wire of the AS . The calling subscriber line (Fig. Z) is identified by the closed contact y1. When checking the AS, T II responds, at the same time I2 is held over stone winding II. This separates the call potentials from the subscriber line.

In the AS-GW, agl relay VAg is excited by switching. The c-wire of the AS is grounded by vaguely, thereby blocking the subscriber line in a known manner. vague and vag5 switch the feed bridge to the speech wires so that relay Ag remains energized via the subscriber loop. Relay Xg does not respond in this circuit because its two windings are connected differentially.

The subscriber can now, in a known manner, receive a dialing signal which indicates to him that he can start dialing numbers. In the first series of current impulses, Ag oscillates in time with the current impulses. The voter is thereby lifted into the desired decade in a known and not shown manner. During the current impulse, VBg responds because it is vaguely closed. VBgl keeps the test circuit interrupted during the current impulse. After the end of the first series of current impulses, l-'Bg drops as a result of a permanent short circuit across agl, so that the voter turns in automatically. When checking for a free LW (Fig. Q.) The test relay 'Pg responds. The selector is thereby stopped and blocked by short-circuiting the high-resistance winding Pg II via pgl of the LW. The speech wires to the LW are switched through via pg = and pg3.

The additional selector arm GWz has been adjusted as a function of the lifting process. The selected decade is marked above this arm. The other additional selector arm GWe is only operated by turning the selector. The turning step to which the GW is set is marked with this arm. Both labels are not used in house traffic. They are used to control the AW to the LW used in the inquiry connection when transferring an exchange connection, as described in more detail below.

In the LW (Fig. Q.), When the GW is checked, relay Al responds via its winding I as an occupancy relay.

Once .the GW switches through the speech wires, the relay Al is kept energized through both windings as feed relays. Relay VAI responds over all and remains energized in a known manner until the connection is terminated. When the subscriber dials the following number, relay Al alternates between dropping and pick-up and thus transmits the current impulses first to the lifting magnet and then to the rotary magnet. During the series of current impulses, VBI responds via its winding I and energizes VCI via vbh relay. When the two delay relays drop out one after the other after the selector has been set, all the test relay Pl is grounded via vcll, vbl4, so that it can test the state of the desired subscriber line. When it is free, it blocks in a known manner by short-circuiting its high-resistance winding II via pll. pll and pll switch the speech lines through. The desired subscriber is called, Yl not responding to the alternating ringing current, since it is damped by the short circuit of its winding I via yll. As soon as the subscriber answers, YL responds via the direct current loop, switches the a-wire through and energizes relay VBL II via y13. By switching vbl3 the call is finally switched off. When the participants hang up the receiver at the end of the conversation, the feed relays Al and Yl drop out. As a result, the VAI, TVBL and VCI also become de-energized. Relay PI I is short-circuited via vcll and y14, drops out and then releases the called subscriber. The c-wire to the GW is de-energized by switching val3, since either yh is already open or earth is connected via vbll and UML. As a result, the relay Pg in the group selector is de-energized, drops out and triggers the release. a. Outgoing exchange traffic If a subscriber wishes to initiate an outgoing exchange connection, he briefly presses the button after lifting the receiver. If the AS of a free connection path has already run into the line at this moment, relay Xg (Fig. 3) is energized, which triggers the connection path again in a manner not shown. Relay RI (Fig. A) is short-circuited through the earth, which is applied via the key that is still pressed, but relay TI responds. Until the AW is checked, the earth on the b-wire remains switched on via t3 and r3. The exchange distributor is activated via t4 and r4, which initiates the setting of a free exchange dialer AW of the relevant subscriber group on the calling subscriber line. The calling line is identified by the closed contact t1 via the c-wire.

When an exchange transmission is occupied (Fig. 5), a changeover relay AU is energized which, with its contacts au ', aul, aua, switches on the switching arms of the exchange dialer AW leading to the subscriber circuit TS. The ATT 'is brought to the setting in a known manner and therefore not shown. After the setting has been made, the test relay Pan speaks, switches the voice wires through with p2 and p3 and blocks via p1 in a known manner. The feed relays A and B respond. Relay TJA is energized via x2 and a2, which is then held during the entire occupancy. The direct current loop of the exchange line AL is closed via a1.

As soon as the public signal sounds, the subscriber can now start dialing the number. The relay VB responds during each series of current impulses. The transformer is short-circuited at contact vbl to avoid pulse distortion.

If the subscriber hangs up at the end of the conversation, relays A, B, T% A and P drop. The tripping magnet A11 is excited via contacts vag and p4. The voter runs back to the rest position, in which he interrupts his own circuit via head contact. 3. Incoming official traffic When an official call comes in, a call sign appears. B. turns on by flipping an inquiry switch from into the trunk line.

There. such devices are known per se, their representation was dispensed with. When establishing the connection to the desired extension, the changeover relay AU is not energized, so the connection is established via the switching arms a2, b2, C. In this case, the exchange dialer works as a group dialer. When choosing the first digit, the z. B. can be done by dial or numeric transmitter, the lifting magnet H.11 of the ATV is operated. After the series of current impulses has ended, the voter turns freely on the chosen decade until the test relay P can check for a free line selector via arm c =. The test relay short-circuits its high-resistance winding via p1 in the usual way for the purpose of blocking.

In the LW (-A-bb. D.) The occupancy relay Cl responds via val2, vbh, izrzzll, pull. This relay identifies the LW as occupied for an exchange connection. The following two series of current impulses set the selector to the desired connection line by lifting and turning it in the known manner. Relay PAL I serves as a test relay, since c11 is switched over. When the line is free, it responds and switches the speech wires through directly via pal2, pal3, pal4, pal5, so that the call and supply of the extensions are made from the exchange transmission (the call organs are in of the transfer of office not specifically shown as they are known). By switching pah, the subscriber line is blocked by direct grounding of the c-core. The short circuit of winding II of the PAL relay is canceled at the pull contact, so that the relay can hold itself in the c-wire until the end of the connection.

The triggering is initiated with outgoing exchange traffic by the fact that the subscriber hangs up and as a result the feed relays A and B are de-energized in the exchange transmission. d .. Initiation of an inquiry connection If a subscriber wishes to hold an inquiry during an outside call, he briefly presses the key. While the button is pressed, relay B (Fig. 5) drops out due to a short circuit, while relay A is energized. Therefore X speaks about e2, bi, a3. Since u @ is still open, the short circuit of VB is canceled by x2 so that it responds. Relay U 1I is excited via vb3 and x '. With u = and u3 «> the voice wires to the inquiry line are switched over, and 1s4 puts the choke coil Dr in bridge in the exchange line to hold the exchange connection (the bridge has already been inserted through x1 in preparation to prevent power interruptions when switching over).

After the key has been pressed, B responds again, so that X drops out. VB is therefore short-circuited again and drops out. U continues through Wi-, zzl and UI .

In the consultation line circuit (Fig. Ab) the relay RRF responds via the loop, which is closed via a1 and ring carrier of the exchange transmission, and causes the AS to set a free connection path on the consultation line. As soon as AS checks, the isolating relay TRF responds.

The subscriber switched on inquiry receives from the connection path z. B. the dialing character and starts dialing a number. The consultation connection is set up in exactly the same way as a house connection. 5. Ending the inquiry call If the subscriber wishes to terminate the inquiry connection and switch back to the exchange line, he briefly presses the key again. Relay B drops out again, so that X could respond. However, VB does not respond now because it remains short-circuited via its own contact z, b2 and uB even after x2 has opened. The winding I of the relay U is short-circuited via x3, so that relay U drops out. As a result, the voice wires are switched back to the exchange line via u2 and u3. At the same time, the choke coil is disconnected again by opening u4, since it can now be dispensed with. The established inquiry connection collapses.

6. Transfer of an exchange connection If a subscriber wants an exchange connection transfer to another extension, he first makes an inquiry connection and notifies the desired extension - after their message, it puts on it the inquiring office picks up the phone.

The relays A and B and consequently VA and P in the trunk transmission drop out. The release magnet AM is excited so that the voter returns to the rest position. As soon as the head contact h2 has closed, the relay UM responds via va4 and the wires u and v interconnected by trf4 of the inquiry line. It holds on to its own contact um7 until the transfer is carried out, which is marked by the reopening of va4. The power magnets of the selector are switched off by um 'and zcm4 from the circuits intended for the normal setting and connected to those controlling the allocation. About um 'is addressed to S, which cancels the short circuit of T with s1. This now also responds and short-circuits via t 'relay S. T now lasts until the assignment is completed.

During the response time of T and the fall time of S, the resistance WP is connected to relay TRF via s2, um ', c-wire of the inquiry line.

This causes a current gain on the c-wire.

As a result of the interruption of the loop by opening a1 (Fig. 5), the relays Al and VAI (Fig. 4) have dropped out. Since `both VBI and YL are excited, switching val 'reverses the polarity of the c-wire arriving from the GW. The winding of the relay UMl is low-resistance, so that the blocking of the LW against occupancy from a third party is still maintained.

As a result of the polarity reversal, the relay Pg (Fig.3) drops out. Therefore, in the AS-GW 'the incoming c-core is connected to the outgoing c-core via vbg2, hBg II, Ullllg, umgi, pgi, Pg I, umgl.

Furthermore, by opening b2, the short circuit of winding II of TRF via wires x and y of the inquiry line has been opened. Before the current amplification just described, the relay VBg II was able to hold itself in this circuit via the c-core of the inquiry line, because it is designed with high resistance, just like TRF II.

As soon as the described current amplification is given to the c-wire, the relay UMg (Fig.g) responds. It applies direct earth to its winding via the surrounding area, so that it can continue to operate even after the current amplification has ended. Contact umg2 switches the c-wire leading to the LW to arm GWe, which is used to identify the turning step when relocating. Contact umg3 puts earth on the arm GWz to mark the lifting step.

Simultaneously with this, the following processes take place in the transfer of office: The lifting magnet HM receives electricity by switching UM , the voter lifts one step. Relay H is energized via the armature of the lifting magnet hm and via um ' , which with hl interrupts the circuit of the lifting magnet. The interplay repeats itself until Z checks for the marked decade. The circuit for Z is closed via um, ', AWz, multiple field to the GW (Fig.3), GWz, umg3.

By turning z1 (Fig. 5) the lifting magnet is switched off and the rotary magnet DM is switched on. The selector rotates via its self-breaker contact dm until relay, which checks for the rotation step e3, interrupts the turning circle. E checks over ums, arm AWe, multiple field to the GW (Fig.3), GWe, umg2, c-wire to LW, c12, val3, vbl2, UM, yl2. Relay E holds itself over its winding II, own contacts 'and u' until the end of the transfer.

In the LW (Fig. 4) the relay Uml responds in this circuit. It opens the short circuit of relay PAI II with umh and puts it in series with Cl on the c-wire to the AW. Since the test relay the AW is earthed via e1, it can respond in series with PAl and Cl. The connection is therefore switched through to the desired point in the same way as for an incoming exchange connection. As soon as the feed relays A and B and consequently VA respond in the exchange transmission, the circuit is interrupted for UM at va4, so that it drops out. UI is short-circuited via el and a4, it drops out and reverses the inquiry circuit. E is also de-energized by opening u5.

The c-wire between GW and LW is interrupted by opening c12 (Fig. 4). By closing b2 (Fig. 5), wires x and y to the feedback line and thus the high-resistance winding II of TRF are short-circuited. The relay can now no longer hold because, as already described, hBg II is high-resistance. TRF therefore drops out, opens the c-wire to the AS with trf, so that the relays VBg and U11ITg (Fig. 3) are also de-excited.

This is the same status as for a normal incoming exchange connection manufactured.

Claims (1)

PATENT CLAIMS: i. Circuit arrangement in telecommunications, in particular telephone systems, for selectors that can be set in two directions of movement by two successive rows of impulses, in particular rotary dials, which, in addition to the switching elements that follow both directions of movement in succession, have a pair of further switching elements, one of which is under the influence of the first series of impulses is only moved in one direction and then the other under the influence of the subsequent second series of current impulses only in the other direction, characterized in that a voice selector of a traffic direction, z. B. Office, is controlled on a line that is given to him by the combination of the settings of both each only movable in one direction identification switching elements of a voice selector, preferably rotary dial, a different direction of traffic, z. B. House, is referred to. Circuit arrangement according to Claim i, characterized in that both speech dialers are designed as rotary dials with identification switching elements each movable in only one direction, the line on which this selector stands being identified by means of the identification switching elements of one selector and this line by means of the identification switching elements of the other selector is visited. 3. A circuit arrangement according to claim i for telephone private branch exchanges, in which an exchange dialer is redirected to a line marked via a query connection for transferring an exchange connection, characterized in that the number current surge receiver (GW) used in the query connection has its setting by means of each only in one direction movable identification switching elements (GLVz, GLVe) and the dialer (AN ') seeks out this or a corresponding setting by means of his identification switching elements (AWz, AWe), which are likewise only movable in one direction. d .. Circuit arrangement according to claim 3, characterized in that the - \ 7uminernstroinschlagempfänger (GTV) used in the inquiry connection is stimulated by a switching criterion from the office dialer (ALl ') to identify its setting by means of the identification switching elements which are only movable in one direction. 5. Circuit arrangement according to AnsPruch .4, characterized in that this incentive consists of a current gain given over the test wire. Circuit arrangement according to Claim 5, characterized in that when the transfer is initiated (response to UAl), a relay chain (S, T) assigned to the exchange dialer comes into effect, which causes a brief pulse amplification on the test wire (c) of the inquiry line (via s2 and around'). 7. A circuit according to claim 6, characterized in that when the assignment is initiated (drop in AL due to opening of the direct current loop of the inquiry line) the incoming test wire (c in the last number surge receiver (LW, Fig. 4) is reversed (by shifting val3) B. A circuit according to claim 7, characterized in that the test relay (Pg) of the current pulse receiver (GTV, Fig. 3) is thrown off by reversing the polarity of the test lead, whereby incoming and outgoing test leads of this number surge receiver are connected to one another (by pgl) Circuit arrangement according to Claim 8, characterized in that a switching means (U., VTg) is located in the connected test wire, which responds to the current amplification, removes the connection of the test wire (at the contacts unagl and uyng =) and the potential is applied to the identification switching elements (GTVe and GWz) of the number surge receiver (via cracked = or 1 Ziiltg3.-