DE959195C - Circuit arrangement for telephone systems with dialer operation and keyboard selection - Google Patents

Description

and Stf

Ernst Horn, Berlin-Friedenau,
. Klaus-Peter Schmidt, Berlin-Grunewald
have been named as inventors

and keyboard selection

Patent issued February 7, 1957

The invention relates to a circuit arrangement for telephone systems with dialer operation and Keyboard choice, in which the setting of the voters of a connection path under the influence of common Setting devices are made by the calling station according to the to be selected Number can be controlled.

Arrangements are known in which several or all. Voters of an electoral level or several setting devices are assigned together. The connection of a setting device takes place either when the voter is occupied or when the calling party takes effect Digit sent, corresponding to the digit to be dialed. In the The latter arrangement is an adjustment device only for the inclusion of the code character and time required to hire the voter occupied.

There are also arrangements are known in which one before the first, depending on one Dialing number in a certain traffic direction to be set voter located point of the connection route, z. B. behind the preselection organs, a setting device is connected to the connection path or just such a connection path can be assigned who has access to a free setting device. These accommodation facilities take all numbers corresponding to the number of a desired connection line

series of current impulses or code characters, save them and initiate the setting of all Connection route selector.

In these systems, one is several; Memories, taps, control devices, control and auxiliary relays etc. containing setting device occupied and locked all the time necessary to build up required connection. An adjustment device is also available during the

ίο pauses switched on; so will only be imperfect exploited. This is opposed to the advantage that only at a single point of the connecting paths Schalrmdttel for connecting adjustment devices are required.

In systems with keypad selection, in which the various digits of a phone number correspond Code characters are recorded and saved at one point on the connection route, to reduce the number of memories and voter settings required, and thereby It is the object of the present invention to make such systems economical. Is resolved this task in that over in front of the first optionally to be set connection dialers Lying positions of the connection paths for setting the connection dialer serving setting devices be influenced by the voting marks sent out, each setting device only the Setting a connection dialer is used and a free setting device when it comes into effect a code character sent by a calling station is switched on via a free dialer. According to a further embodiment of the invention, each free voter is assigned a search dialer, the when a connection path is occupied, it adjusts itself to this and the associated free voter switches on for the duration of the connection establishment.

The number of adjustment devices required

depends on the traffic. In any case, it is smaller than the number of free voters. In Figs. R and 2 two embodiments of the invention are shown. It's just them Circuit details necessary for understanding are shown.

Fig. Ι shows an arrangement in which upon arrival a code character via a free selector a free setting device to the connection path switched on and switched off again after setting the connection selector to be controlled by it will;

Fig. 2 shows an arrangement in which the adjusting device is switched off already after taking the code character by the free voter, so that the subscriber send out another code character and thus occupy a new setting facility can, while at the same time the control of the first connection selector by the setting device takes place via a coupling selector, the has recorded the first code character.

This is achieved compared to the arrangement according to Fig. Ι that the participant the individual Can press selection buttons to send the code characters in quicker succession.

The mode of operation of the circuit according to FIG. 1 is as follows: A call searcher AS is occupied by the subscriber via the event chain. The call relay R picks up via the contact id (circuit not fully shown). The contact 3 r prepares the check on the calling subscriber line. In circuit 1, the A i relay of the search selector SW responds via contact 4r :

i. +, 4-r, 5 a, 6p2, AiI, -.

The contact 8 r marks the bank contact belonging to the busy caller in the c-core of the search dialer. One of two other contacts of the call relay R brings the Q relay (not shown) of the call seeker and occupies a / at the same time. GW. The call finder starts up via the other contact.

After Ai approaches the search dialer, it also starts up. The contact 9 α 1 prepares the checking of the SW on the bank contact marked by 8r and 10αϊ the pick-up of the Ci relay in the SW .

In the call searcher, after the Q relay has responded, contact 12 g prepares the Pa relay to pick up. If the AS has checked the calling subscriber, its test relay P picks up.

2. +, Pll, Pl, zr, asc, c, ..., -.

The call finder is shut down. Contact 13 / »short-circuits the winding II of the P relay and prevents further call seekers from checking this subscriber line by shifting the potential. The Pa relay in circuit 3 is excited via contact 14p.

3. +, 12a, 14p, Pa, -. _ioo

After Pa has picked up, a holding circuit for the test relay in the call searcher is closed over 15 pa and a holding circuit for the A i relay in the search dialer is closed over 16 pa. 17 pa marks the bank contact of the SW for checking the occupied AS even after the call relay has dropped. The contacts i% pa and igpa connect the subscriber line to the search dialer. The 2> relay of the call seeker (not shown) is excited via a further contact of the Pa relay, which with its contact 2d advances the starter chain and by opening its contact ι d brings the call relay R to waste. After R has dropped, circuits r and 2 are disconnected and holding circuits 4 and 5 are effective:

4. +, 16 pa, Sa, 6p2, All, -.

S- +, 13 P, -PI. ISM äse, c,. .., -.

When the c-arm of the SW has reached the marked bank contact, the .Pi relay of the search dialer and the ^ relay of the call seeker in circuit 6 picks up:

6. +, gai, 2op2, Pill, FiI, sure, 21c, 17pa, AIII. -.

The search dialer is stopped. The contact 22 ρ ι short-circuits the winding II of the pi relay and prevents further SW from being checked on this marked bank contact by shifting the potential. The P2 relay in circuit 7 is excited via contact 2'3 /> i:

7 +. ² 3 pi, -P21, -.

The contacts 24 p 2 and 25 p2 switch the a and fr wires of the search dialer through to the call seeker and thus place the feeder bridge A1, Bi on the subscriber line. The subscriber receives an official signal that is inductively transferred to circuit 8 in a known manner:

8. +, Aiii, 28 ti, 24 p 2, swa, 32 c, 18 pa, asa, a, participant loop, b, asb, 19 pa, 34 c, swb, 25 p2, 30M, Bi, -.

The starting chain of the SW is switched on at the contact 7 ρ 2, while the circuit 4 is interrupted by opening 6 p 2. Relay A1 remains in circuit 8. The occupancy relay C1 of the SW picks up in circuit 9:

9. +, 27 ^ 2, ioo-i, Ci, -.

The contact 20 ρ 2 prepares the drop of the Pi relay. 26 p2 maintains the blocking of the SW by connecting ground via the resistor Wi 2 to the c-arm of the SW .

After C ι has drawn in, a holding circuit for P 2 is closed in preparation at contact 36 c 1. The contact 37 c 1 prepares the first test, the contact 38 c 1 the second test and the blocking of a free setting device Ee .

If the calling subscriber places the combination corresponding to the first decade digit to the a and / or & wires of the subscriber line by pressing a selection button, then the feed relay A ι drops out in the SW. The contact gai interrupts the circuit 6, so that the P i relay is de-energized, while A in the call finder continues via circuit 10:

10. +, Wt2, 26p2, swc, 21c, 17pa, AIXI, -.

The contact 10αϊ interrupts the circuit 9, C1 drops. In the time when A ι already, C1 has not yet dropped, the test for the setting devices and the occupancy of such by the free selector FW takes place.

Is z. If, for example, setting device 1 is free, the coupling relay Kn of the free selector in circuit 11 responds:

11. +, iiai, 37C1, 39M, if ill, GLi, 42011, -.

If, however, the setting device 1 is occupied and the setting device 2 is free, the coupling relay pulls if 12 in circuit 12 to:

12. +, iiai, 37CI, 39M, K12I, GL2, 43C12, -Ken.-.

The same applies to the third coupling relay in the event that the setting device 1 and the Setting device 2 are occupied.

Takes the free voters no free adjustment, so C 1 can in time, A 1 have not yet fallen off, neither relay Kn, K 12, Kit, attract, and the participant will receive waste from C ι busy signal. If, on the other hand, circuit 11 has become effective, the second test for setting device 1 takes place in circuit 13:

13 +. 38CI, UI, Uli, Sofei 3. 48Ä12, 47Ä11, 52u / KiiII, 55gi, Cii, - ~.

In this circuit, the t / relay and the occupancy relay Cn of setting device 1 pick up. The contact 42c 11 switches to the position 45c 11 and thus switches the contact chain of the setting devices, consisting of the contacts 42 to 46.

After U has picked up, the excitation circuit of the coupling relay Kn at contact 39 u is opened and at the same time the winding of the coupling relay K 11 short-circuited by contact 52 u is placed in the circuit 14 which, after 58w is closed, also serves as a holding circuit in P2:

14. +, P2II, 58m, Uli, 50 & 13, 48 ^ 12, 4.7kl !, if 11II, 55 ^ 1, Cn, -.

This second test (circuit 13 and 14) prevents the occupancy of a setting device by two subscribers calling at the same time. Is z. B. initiated by addressing the coupling relay Kn from the participant Tn the assignment of the setting device ι and at the same time prepared by another coupling relay (not shown) the assignment of the same setting device 1, only the coupling relay of the subscriber can continue to fall from Ci , its {7 relay picked up first.

After U has picked up, contacts 28 u and 30 u have disconnected the feeder Ai, Bi from the subscriber line and contacts 29 u, 31 u have switched on the dialing bridge to the subscriber line. 59 ^u , 60 u and 61 u connect the d, e and f wires of the search dial.

In the selector bridge, the selector bridge relays set themselves according to the code characters given by the subscriber via the two wires of the connection line (circuit 15 and 16). The participant places z. B. via one or more resistors earth to one, a, to the other, b, or to both wires α and b of the subscriber line:

15. +, Option key, ..., σ-wire, asa, 18 pa, 32 c, swa, 24p2, 2911, 62 ^ 11, 68ei, AnI, 69 (111, HiI, -.

16. +, Option,. .., & -Ader, asb, 19 pa, 34 c, swb, 25 ρ 2, 31 u, 65 ^ 11, 72 ei, B111, 73b n-, H1 II, -.

The selector bridge relays An and Bn have fault current if the subscriber applies earth to the subscriber line via two resistors. For this, however, the Hi relay, which is excited internally in the setting device, can hold itself at this current level (two resistors) (e.g. in circuit 15) via its winding I and / or im

Circuit τ6 via its winding II. If the subscriber applies earth via only one resistor to the a and / or the & -wires, the relays A 11 and / or B 11 can respond. At their contacts 69 αϊ ι and / or 73 b ττ they switch off the H τ relay and place the relay A 12 and / or B 12 in the selector bridge circuits via the contacts 7ία · 11 and / or 75 & 11. However, A 12 and / or B 12 have fault current at this current level (a resistor switched on); they can only attract if the subscriber puts earth directly on the subscriber line. The individual combinations of options should be chosen in such a way that either the Αττ- or the i? 11 relay can pick up.

If the selector bridge relays have set themselves according to the button pressed by the subscriber, a relay E τ responds in circuit 17:

17. +, 76dl, 127 ^ 1, 770H1 / 78 & 11, Ei-I, -.

After E1 has responded, holding circuits for the selected selector bridge relays are closed via their windings II or III (not shown), selector bridge circuits 15 and 16 are disconnected at contacts 68 ei and 7221, and circuits 18 and / are separated at contacts 70 e 1 and 7421 or 19 closed, in which a blocking relay Sp 1 responds, which prevents the disconnection and release of the setting device if the button of the subscriber is still pressed after setting the connection selector.

18. +, dial button, ..., α-wire, asa, 18 pa, 32 c,

swa, 24 ^ 2, 2911, 62 & 11, JQeI ₁ -SpIl, -. 19. +, Option,. .., ö-Ader, asb, igpa, 34c, swb, 25 p2, 3JU ₁ 65 fr 11, 74 <ji, Spill, -.

When Ei pulls in , the control and setting of the connection dialer begins at the same time, e.g. B. by backward impulses via the circuit 20:

20. +, Ji, 92 ei, 7ggi, 86fr 11, 61 ϊι, swf, & -Ader (to GW), ..., - (to GW).

In this circuit, the Ji relay responds with each pulse from the connection selector, which advances a counting relay chain (not shown) according to the number of pulses. A certain point was marked by the contact pyramid of the selector bridge relay. If the contacts of the counter relays have now adjusted to this point, a test circuit 21 is closed via the α wire to the group selector, in which the test relay of the GW responds and stops it:

2i. + (in the GW), test relay (of the GW),. . ., α-wire, swe, 60 w, 83 fr 11, ... (contact pyramid of the selector bridge relay in setting device 1 and contacts of the counting relay), 126g 1 / EiII, Gill K03, -.

In this circuit, the release relay G ι picks up at the same time, which prepares the triggering and activation of the setting device 1. The G ι relay is placed in a self-holding circuit via its contact 128 g · 1 and its winding II

, 22 and opens at its contact i2jgi the pick-up circuit 17 of the .Ei relay, which is held after opening 126g "1 in the circuit 21 via its winding II.

22. +, 76c 11, 128 gi, GiII, -.

Circuit 14 is interrupted at contact 55 ^ 1. This interruption is not effective, however, since the relays Cn, Ku, U and P2 are held in the circuit 23 via the contact 12521.

23. +, P2II, 58U ₁ Uli, 5ofri3, 48fri2, 47kl !, ^7S KnII ₁ i2sei / 8gspi, Cn, -.

After the group voter has been redirected to free choice, the is interrupted there Circuit 21. The relay £ 1 drops out and opens circuit 23 at its contact 125 * 1.

However, this interruption only takes effect if the subscriber's dial button is no longer pressed, as the relays U ₁ P 2, Kn and Cn otherwise remain in circuit 24:

24. +, P2II, s8μ, Uli, 50fr 13, 48fr 12, 47fr11, KnII, 8gspi, Cn, -.

If the selection button now returns to its rest position, the circuit 18 and / or 19 is interrupted. The blocking relay Sp ι drops out, opens its contact 89 sp ι and thus the circuit 24. The relays U ₁ Kn, Cn and Ci drop out, and the relays Ai, Bi and Ci respond again. The circuits 8 and 9 are thus re-established, and P2 continues to exist via contact 36c 1.

The participant can start by choosing the second digit of the decade.

After the line selector has been set, the following takes place from there during the time: G1 already attracted, E ι not yet dropped, via the b-wire a special impulse is sent to the setting device to determine whether the called subscriber was found free or occupied. In the 'first case, if in the last electoral stage z. B. the setting device is switched on again, the selection relay F1 in the circuit 25 and closes the circuit 26 with its contact 90/1.

25. + (in the LW), b-wire (up to the AS), swf, 61 u,

86fr 11, 93? Ϊ́, Fi, -.

26. +, 90/1, 80fr 11, 59W, swd, gia, C ₁ -.

In the circuit 26, the circuit switching relay C pulls the call detector to, puts itself in a holding circuit (not shown) which opens at the contacts 21 c, 32 c and 34, the circuits c via the a-, b- and c-wire of the search selector (Circuits 6 and 8) and with its contacts 33 c and 35 c switches the subscriber line through the capacitors Ko ι and Ko 2 to the I. GW .

The search selector is free and returns to its rest position in a known manner. The subscriber is fed by the feed relay A of the call seeker ^ (circuit 27).

27. +, AI, 33. c, 18 pa, OJcz-, a-vein, participant, fe-vein, asb, 19 pa, 35 c, v4II, -.

In the circuit arrangement according to FIG. 2, the call searcher is assigned by a subscriber and the occupancy of a search dialer by the occupied caller and the setting the call seeker to the subscriber and the setting of the search dialer to the call seeker such as

to in the circuit arrangement according to FIG. 1 (currents · ¹ circuits 1 to 9).

If the calling subscriber puts the combination corresponding to the first decade digit on the α and / or & wires of the subscriber line by pressing a selection button, the feeder relay A 1 in the search selector drops out. The contact 901 interrupts the circuit 6, so that the Pi relay is de-energized, while A in the caller is still in the circuit 10. The contact ioai interrupts the circuit 9. C1 drops out. At the time when A 1 has already dropped and C ι has not yet dropped, the test for the setting devices is carried out, and such a device is assigned by the free voter. Is z. If, for example, setting device 1 is free, the coupling relay if 11 of the free selector in circuit 28 responds:

28 +, Shark, 37 Cl, 39M, KNI, GLi iooc2i, 42 c 11, -.

If, on the other hand, setting device 1 is occupied and setting device 2 is free, coupling relay Ki 2 in circuit 29 picks up:

29. +, 11 αϊ, 37CI, Z9 ^U > K12I, GL2, 101C22, 43CI2, IO3C2I, 42cii / (or) 45cii, -.

The same applies again to the third coupling relay in the event that the setting devices 1 and 2 are occupied. If the circuit 28 has become effective, however, the second test for Ee 1 takes place in circuit 30:

30. +, 38ei, 171, Uli, 50 * 13, 48 * 12, 47Jfeii, H, IO5C2I, Cn, -.

In this circuit, the [/ relay and the occupancy relay C11 pick up again. The contact 42c 11 switches to the position 45cn and thus switches the contact chain of the setting devices, consisting of the contacts 42 to 46 and 100 to 104, to the next free setting device. After U pulls in, the excitation circuit of the coupling relay Kn is opened by the contact 39 u and at the same time the winding II of the coupling relay Kn short-circuited by the contact 52 μ is placed in the circuit 31, which serves as a holding circuit for P 2 after 58 u are closed.

31. +, P2II, 58M, Uli, 50 * 13, 48ki2, 47 * 11, KnII, 105C21, Cn, -.

This second test (circuits 30 and 31) again prevents the occupancy of a storage facility by two subscribers calling at the same time.

The contacts 28 u, 3011 switch off the feed relays Ai, Bi from the subscriber line, and the contacts 29 u, j, iu place the selection bridge on the subscriber line.

If the selector bridge relays have set themselves according to the button pressed by the participant, this is how relay £ 1 responds in circuit 32:

32. +, 76C11,

, 77cz.11 / 78fcn, express, -.

After E 1 has responded, holding circuits for the selected selector bridge relays are closed via their Wicklungs.il or III (not shown), the selector bridge circuits 15 and 16 are separated at contacts 68 e ι and 72 e 1, and the selector bridge circuits 15 and 16 are separated at contacts 70 eι and 74ei the Circuits 18 and / or 19 closed, in which the blocking relay Sp 1 responds again, which prevents the switching off and release of the setting device before the button of the participant has returned to its rest position.

After E 1 has picked up, an auxiliary relay C 21 of Ee ι is also excited via contact 106 ei in circuit 33:

33. +, 108 * 22, 109 * 23, K21, C21, io6ei, -.

Through its contact 107 c 21 a new circuit for the E i relay is closed.

34. +, IO7C2I, 127g · i, 77CII1 / 78 & 11, Eil, -.

The circuit is at contact 105 c2i. 31 separated. If the subscriber's selection button has already returned to the rest position (marked by a drop in. Spi), the relays U ₁ Kn and Cn also drop out, the circuits 8 and 9 are restored, Ai, B ι and C 1 in the search dial pull up again and P 2 continues through contact 36ei.

The participant can start by choosing the second digit. If he presses the selection button corresponding to the second decade digit, a new setting device is assigned via the first group of coupling relays K11 to KiZ of the free selector. However, the tightening of Kn is prevented by the contact 100 c 21, since the setting device 1 is still occupied.

The coupling relay K 21 was addressed at the same time as the auxiliary relay C 21 of the setting device. It has closed its contacts 114 * 21, 117 * 21 and 120 * 21, which are used to control the connection dialer.

By opening contacts 110 * 21, 112 * 21 At the same time, further coupling relays of the second coupling relay group will pick up before termination the setting of the first connection dialer "5 prevents.

When it is set, the connection dialer gives back impulses via the dem Circuit 20 corresponding circuit 35:

35. +, Ji, g2ei, 7ggi, 120 * 21, swf, & -Ader (to GW), ..., - (to GW).

Have the contacts of the pulse counting relay chain on those of the contacts of the selector relay marked point is set, the group selector is shut down via the α wire

in that, circuit 36, which corresponds to circuit 21.

36. + (in the GW), test relay (in the GW),. . ., α-wire, swe, 117 & 21,. .. (Contact pyramid of the selector bridge relays and contacts of the counter relays in the Eei), 126g 11EiIl, GiIlKoJ ₁ , -.

In this circuit, the activation relay G1 of Ee 1 picks up at the same time, which prepares the triggering and activation of the setting device. The G i relay is again placed via its contact 128 | f ι and its winding II in a holding circuit 22 and interrupts its! Contact 127 £ ι the pick-up circuit 34 of the .E1 relay, which holds after opening the contact 126 g τ in the circuit 36 until the connection selector also the interruption of this circuit takes place. If E ι drops, its contact 106 e 1 opens the circuit 33. C 21 and K21 drop. The setting device is free for new assignments after the contact 100C2i is closed.

Has the subscriber during the setting of the first connection selector a new Einstelleinas direction, z. B. Ee2, is occupied and the code character corresponding to the second decade digit is transferred to it, after the coupling relay K21 has dropped out, the coupling relay K 22 immediately picks up via contact 110 ^ 21. The setting of the second connection dialer begins, and at the same time the subscriber can key in the third digit of the decade.

By the circuit arrangement according to FIG the subscriber is thus enabled to use while setting a connection dialer a first setting device is already intended for setting the next connection selector To send code characters to a second setting device. The election times can thereby be abbreviated advantageously.

Claims (9)

PATENT CLAIMS: i. Circuit arrangement for telephone systems with dialer operation and keyboard selection, characterized in that setting devices (Ee) influenced by the dialed digits are switched on via free dialers (FW ₃ coupling relays) located in front of the first number surge receivers, which are only used to set a number surge receiver and always first at the moment the code characters are keyed in by the calling station via the free dialer (FW) . 2. Circuit arrangement according to claim 1, characterized in that the number of adjustment devices (Ee) is smaller than the number of free voters (FW). 3. Circuit arrangement according to claim 1, characterized in that when a connection path is occupied, a free selector (FW) is switched on via a search selector (SW) for the duration of the connection establishment. 4. Circuit arrangement according to claim 3, characterized in that a feed bridge (A ι, Β 1) arranged behind the search selector (SW) takes over the feeding of the calling party during the connection establishment. 5. Circuit arrangement according to claim 3, characterized in that an occupied setting device (Ee 1) is switched off after setting the connection dialer to be controlled by the free dialer (Fig. 1). 6. Circuit arrangement according to Claim %, characterized in that, after a code character has been recorded, the setting device (Ee 1) is switched on to the outgoing connection path (GW) with simultaneous disconnection from the incoming connection path (AS) (Fig. 2). 7. Circuit arrangement according to claim 6, characterized in that after disconnection 'of the setting device (Ee τ) from the incoming connection path during the setting of the connection selector, another setting device (e.g. Ee2) when the next code character becomes effective via the free selector (FW) is switched on. 8. Circuit arrangement according to claim 3 with free selectors consisting of coupling relays, characterized in that a holding winding (II) of the coupling relay (K 11) only after a pull-in of a blocking relay assigned to the free selector (FW) and opening the response circuit of the coupling relay (Ku) (U) is switched on in the occupancy circuit running via the occupancy relay (Cn) of the setting device (Ee i). 9. Circuit arrangement according to claim 8, characterized in that the blocking relay (U) branches off the connection path from the feed bridge (Ai, Bi) to the selection bridge (A it, B 11, A12, B12, H) of the setting device (Ee 1) switches. For this purpose 2 sheets of drawings & 609617/189 8.56 (609 809 2. 57)