NO116699B - - Google Patents

Description

Link for automatic referral.

The present invention relates to automatic telephone systems and is a switching device for automatically referring a telephone call from one telephone number to another. The invention is limited to such telephone systems which include partly registers and selectors, partly a marker for setting the selectors in accordance with the registration in said registers.

It is known for such connections to arrange partly a multiple with groups of marking wires for marking a called subscriber line number, partly a number of switches which each contain a registration device for a subscriber number and a control device which, with the help of said multiple, controls when calls to said subscriber number are present . The switch's registration device has then been set by a telephone operator after ordering, to whom the call is then automatically connected by means of a special signal to the register that controls the connection.

The invention is intended to give all subscribers the opportunity to refer incoming calls to another subscriber number, a voice machine, a buzzer signal transmitter or a telephone operator even by a simple method without the help of a telephone operator. According to the invention, this is achieved in part by means of another registration device in said

te switch to which a called number is transferred from said register by a preparatory call to a special area code, partly by a relay in the marker which is affected by a control device in the switch during subsequent calls to said subscriber number and which switches the marker's

circuits for setting said selectors in accordance with the registration in the first-mentioned registration device in the switch instead of in accordance with the registration in said register.

The invention will be described in more detail below with the help of the attached drawings fig. 1—7. Fig. 1 shows an overview diagram for an embodiment of the invention, the switch RO being set directly by the identifier D. This embodiment is the basis for the detailed representation in fig. 3-7. Fig. 2 shows an overview diagram for another embodiment, in that the identifier D sets a registration device in the register REG in a known manner and a special side path V-B-R is arranged between the registers and the switch RO. Fig. 3 shows the selector devices in an automatic telephone system according to the invention. Fig. 4 shows a string line SN and a register finder RS. Fig. 5 shows a register REG and a part

of the marker M.

Fig. 6 shows part of the marker M as well as relay rows for selecting the free switch and the free voice machine.

Fig. 7 shows a switch RO.

Figures 3-7 are placed next to each other in a row in numerical order.

In fig. 1 are Al and A2 subscriber sets, LI and L2 subscriber lines, T and T2 voice machines and BL1-BL4 selectors, which connect the subscriber sets and voice machines to cord lines SN so that call connections can occur. In addition, there are a number of registers REG, each with its own register search BR, a marker M and switch-on relays G for the registers and R for a number of switches RO. Two multiples t and u are connected to the marker. The multiple t is based on the identification D and is used to determine a calling subscriber line number. The multiple u comes from the register and is used for the transmission of a called subscriber line number to the marker and to the switches RO, as well as for the switches' monitoring of the calls within the exchange. A bundle of wires p is used to designate the wires to be connected. With the help of a relay device F, a talking machine To is connected to a switch RO and with the help of relays H, the marker selects a free string line.

When a call is made from the device Al, the wire LI is connected over a search device BR to a register REG. At the device, the subscriber hears an answer tone from the register and takes the number for e.g. the device A2 on its finger pad, whereby the number is registered in the register REG and the black tone disappears. If the marker M is free, the register REG is connected via a relay G to the marker M and marks the called number in the multiple u. At the same time, the register affects the identification D, which designates the calling wire number in the multiple t. The marker selects a free string line SN by switching on a relay H and sets the selectors BLI and BL2 through current circuits over the wires p. Conversation connection is obtained between the devices Al and A2 over the wires LI and L2, the selectors BLI and BL2, and the cord line SN.

If the subscriber at the device A2 leaves his place and goes to the subscriber at the device A1, he can switch his telephone calls from the device A2 to the device A1. This happens from the device Al and is carried out by first taking an area code 09 and then the number for the device A2. When the area code 09 is received in the register REG, this is recorded on a relay in the register, after which the register is reset without being released. The subscriber hears the answering tone again and takes the number for device A2, which is recorded in the register. The register is then connected via a relay G to the marker M and a relay R selects and affects a free switch RO. At the same time, the register affects the identifier D. The marker M is prevented from setting up a call connection. Instead, the number of the calling device (Al) is transferred, using the multiple t, and the number registered in the register for the device A2, using the multiple u, to the selected switch RO, which, after it has registered the numbers, sends a signal to the register REG for uncoupling the marker. The calling subscriber receives a new answer tone and must now hang up his hand microphone. The switch RO then checks all numbers that are called, and resets the marker by means of signal wires s, so that all calls to the device A2 are automatically connected to the device Al.

If the subscriber at Al takes the area code 02 instead of 09, then no further digitization is necessary, but 02 is transmitted together with the number for the device Al to an idle switch RO, which then transfers all calls to the device Al to a voice machine Tl, which sends a specific message, for example "Going away, call the information".

If the subscriber at Al dials the area code 00 instead of 09, no further dialing is necessary either, because the digit combination 00 is transmitted together with the number for the device Al to a switch RO, which first selects a free telephone T2 with the help of a selector F recording device and connects the caller to it. A tone signal is sent from the voice machine's recording device to the caller, who is then given 30 seconds to speak in a message, for example "Meet between 4 and 5 p.m.". After the aforementioned 30 seconds, the voice machine is switched over for transmission, the subscriber checks his message and hangs up his hand-held microphone. All calls are then connected to the device Al, so that they are answered by the voice machine T2.

To release the switches RO, there is a special area number 01. A subscriber who wants to cancel a referral calls the area code 01, whereby the register REG registers 01 when a relay is activated, resets its registration mechanism and gives a new answer tone. The subscriber then sends his own number, and the switch that has registered this number is affected and released. The subscriber hears a third answering tone from the register and must now hang up his handset.

Fig. 2 shows another embodiment of the invention. The register REG is provided with an additional registration device, which is automatically set in a known manner using the identifier D in connection with a call and which registers the calling subscriber line number. If an area code whose first digit is O is then dialed, the register REG is connected by means of a relay V to an auxiliary marker B, which in turn is selected and connected to a free switch RO by means of a relay R. The register REG then transfers both the calling subscriber's number and the called number of the selected switch RO. The auxiliary marker is then released and the register sends a tone signal to the caller to indicate that the connection process has ended and that the subscriber should hang up his handset.

The multiple u is used in this case only for the switches' RO subsequent control of called subscriber numbers. The marker M is only required for setting up call connections. Thereby, the register REG is connected via a relay G to the marker M and both the calling and the called subscriber's number are transferred to the marker. At the same time, the called number is marked in the multiple u. When calling the direction digit 00 for the voice machines T2, the marker is also switched on, which initiates the call connection between the calling subscriber line, for example Al, and the selected voice machine by setting the selectors BLI and BL4 on one of the cord lines SN.

The marker M receives a reference to the selected voice machine from the selector F via RO and a signal wire s.

Figs. 3-7 are more detailed principle diagrams of an automatic subscriber exchange, in which the invention is adapted in accordance with that in fig. 1 specified embodiment. The subscriber center is made up of coordinate selectors and electromagnetic relays. Each subscriber apparatus Al—A2 and voice machine Tl—T2 has a bridge in a coordinate selector. Each bridge has several 10-30 contact spring groups for connection to a corresponding number of rope lines SN. Several coordinate selectors are connected to the same string lines, so that each string line has a contact spring group in each coordinate selector bridge.

To simplify the preparation, reference is made to fig. 3 to a small switchboard with nine cord lines corresponding to the bar magnets Sl—S9. Bar magnets in a number of coordinate selectors are connected in parallel so that a cord line SN in fig. 4, which is indicated through a current circuit over wire d, is designated for all subscriber lines and voice machines at the same time.

The register search RS in fig. 4 are bridges in a special coordinate selector with the bar magnets Sil—S19. The cord lines SN in fig. 4, the register REG in fig. 5 and the switches RO in fig. 7, the marker M and the identifier D are made up of relays. The selectors F are also relay devices as shown in fig. 6-7. The subscriber lines LI—L2 in fig. 3 is provided with each line relay LR1—LR2 and are grouped in 10s. The bridge magnets Bl —B2 serve as switch relays. The line relays LR1—LR2 are used for connecting the subscriber lines to common register connection wires ni—n2 arranged for every 10, which simplifies the register connection and identification. This is achieved by arranging the line relays within each 10-number in a row, so that only one line relay at a time within the 10-number can attract its armature. The subscriber numbers are two-digit and the occupancy time for the registers is short, as no lingering waiting times are caused by the fact that only one subscriber at a time within every 10 numbers can make a connection. The register search RS in fig. 4 each have a position for every 10 subscribers, which means that the bar magnets Sil—S19 belong to each of their 10s.

If a call comes from the device Al, which is assumed to have the number 11, to the device A2, which is assumed to have the number 12, the following connection sequence occurs. When the subscriber Al lifts the handset, the line relay LR1 attracts in the following current circuit: +, the contacts 461-471 of the relays G in fig. 6, the thread ml, the contact 94 in fig. 4, wire n6 (contacts 57, 11 and 21, wire loop over wire LI and device Al, contacts 24 and 15, winding on relay LR1 to minus. Contacts 11—18 are affected. Contact 17 breaks the inrush current circuit for relay LR2 and other line relays belonging to the same ten number as LR1. Relay LR1 breaks contact 15 and is held with current across contact 14 in the following current circuit: +, contacts 93—96 and 91 in Fig. 4, the winding now the bar magnet Sil, the wire n5, the contacts 56, 22 and 14, the winding of relay LR1, to minus. The bar magnet Sil attracts. Contacts 91—95 are affected.

Contact 95 completes a circuit for selecting a free register: -f-, contacts 95, 106—107 and 109, the winding of relay H3, wire r5, contact 121 in fig. 5, the winding of the relay RR4, to minus. Relays H3 and RR4 energize and contacts 107—109 and 141 are affected. The bar magnets Sil—S19 form a relay row and the relays Hl—H3 another relay row, in which only one bar magnet and one relay can energize at a time. Contact 94 breaks the inrush current circuit for all line relays LR1—LR2 in the 10s. For the selected register REG, the following circuit is connected: -f-, contact 141, the winding of the relay RR2, the wire r4, the winding of the bridge magnet GB1, to minus. The bridge magnet GB1 affects contacts a5—d5. Relays RR2 and D2 are energized across wire n4, contact d5 and wire r4 and attract their armatures. Contacts 55—57 and 121 are affected. The bar magnet Sli and the relay H3 release their anchors. The relay RR4 is slow-acting during grinding and during its grinding time the relays RR1 and RR3 attract through the following current circuits: +, upper winding of the relay RR1, contact a5, wire nine, contacts 12 and 21, wire LI and device Al, contacts 24 and 16, the wire n2, the contact b5, the wire r2, the intermediate winding of the relay RR1, to minus. Contacts 111—112 are affected. Relay RR3 receives power via contacts 111 and 188. Contacts 131—134 are affected. With this, the line LI is connected to the register REG and the caller hears the answer tone, which is sent out from the buzzer generator Su2 via the contacts 191 and 131 through the lower winding of the relay RR1.

The calling subscriber dials the number for the device A2 on the dial, whereby the pulse series are repeated by the pulse relay RR1 and transferred by the contacts 112 and 133 to a relay set PR, which, in a known manner, registers the pulses, registers the pulse series on the registers the pulse series on the recording devices El—EO or Ell—E10 and is reset after each series of pulses: The first digit, which is 1, is registered when the relay El.

The contacts el and e2 are closed. The relay ER1 energizes when the relay rate PR is reset after the first series of pulses, in the following circuit: -f-, contacts 134 and 151, the winding of the relay ER1, the contact el, the winding of the relay El, to minus. Contacts 191 —193 are affected. Contact 191 disconnects the black tone and contacts 192—193 alternate between the recording devices Ell—EO and Ell—E10.

The second pulse series, number 2, registers when the relay E12 is switched on. Contacts e21—e22 end. The relay ER2 energizes, when the relay rate PR is reset for the second time, through the following circuit: +, contacts 134 and 151, the winding of the relay ER2, the contact ell, the winding of the relay Ell, to minus. Contact 195 is affected. If the marker M is free, the following circuit is closed: +> contacts 464—474 and 472 in fig. 6, the winding of the relay G3, the wire g7, the winding of the relay RR8, the contact 195, to minus. Relays G3 and RR8 energize. Contacts 471—475 and 181—187 are affected. The following circuit for identification of the calling subscriber line LI is closed: +, the winding of the relay D1, in fig. 3, wire n3, connector c5, wire r3, connector 187, to minus. The relay Dl, which belongs to the 10 or so subscribers from which the call originates,

draws and terminates partly a contact 53 for designating the number 10 in the multiple t, partly ten contacts 51-52. The calling line's LI one digit is designated through the following circuit: +, contacts 18, 26 and 51, wire ten, the winding on the relay Tl in fig. 5, to minus. At the same time as the relay Tl, the relay Til attracts with current over the wire to and the contact 53. The contacts 311—313 and 310 are closed.

The following circuits are closed for designation of the calling subscriber: -f, contacts 411 and 413, wires gl resp. g2, contacts 181 and e2 resp. 182 and el2, the winding on the relay wool resp. u2, to minus. The relays ull and u2 energize. Contacts 211—213 and 220 are closed.

The following circuit is closed for selection of a free string line SN: +, the winding of the bar magnet S9, the wire d, the contacts 76 and 86, the winding of the relay Hil, the contacts 102, 104—105, the wire m2, the contact 442, the winding of the relay MR2, the wire g3, contacts 183, 171, and 161, to minus. Relays MR2 and Hil as well as bar magnet S9 energize. Contacts 421 and 101—104 are affected. The selected string line SN is indicated in all coordinate selector bridges BLI—BL4.

Contact 475 on relay G3 in fig. 6 closed a circuit for the relay MR4, which is slow to engage. During the turn-on time of relay MR4, the state of the called wire is monitored through the following current circuit: +, contact 441, the upper and lower windings of relay MR3, of which the upper has high resistance, contact 421, wire v2, contacts 220 and 222, the wire pl2, the winding on the bridge magnet B2 in fig. 3, to minus. If the wire L2 is free, the relay attracts MR3. Contacts 431—433 are affected. The upper winding of the relay MR3 is short-circuited by the contact 433, whereupon the bridge magnet B2 attracts its armature. Contacts 41—46 and a2, b2, c2 are affected. The contact 432 breaks the current for the relay MR4 and the contact 431 completes a current circuit across the wire vi, the contacts 310 and 311, the wire pil, the winding of the bridge magnet Bl, to minus, for connecting the calling subscriber to the selected string line SN. The bridge magnet Bl attracts its armature. Contacts 21—26 and al, bl, cl are affected. The following circuit is formed: +, lower winding of relay N2 in fig. 4 and the contact 71 connected in parallel with the upper winding of the relay N3 over the contact 83, the wire ot, the contact al, the wire LI and the device Al, contacts 23 and 15, the winding of the relay LR1, to minus. The relays N2 and N3 attract and LR1 is maintained in this circuit. Contacts 81—86 and 88—89 are affected. Above contact 101 and later 84, + is connected to wire c and contacts cl and c2 for holding the bridge magnets Bl and B2 and for busy marking. Ringing signals are sent to the device A2 from the ringing generator RG via the transformer RGT and upper contact spring group in the interrupter RP, contact 88, upper winding of the relay NI, contact 73, wire b, contacts b2, 33 and 43, wire L2, device A2, contact a2 , the wire a contact 71, the electrolytic capacitor Cl, the intermediate winding of the relay N2, to +. The contact 13 on the line relay LR1 in fig. 3 prevents the ring current from passing through line LI. Instead, an intermittent summing signal is sent to the apparatus Al from a summing generator Su3 via the contact 81, is transformed between the upper winding and the intermediate winding of the relay N and passes over the wire a to the lead LI. When the bridge magnet B1 was attracted, the contacts 21 and 24 broke the current for the relay RR1 in fig. 5, which relay releases its armature. The contact 111 is opened. When relay RR3 releases its armature, contacts 131—134 open and the register is reset. Contact 195 opens and relays RR8 and G3 release. The marker M is released. Relays MR2 and Hil which were held by contact 101, bar magnet S9 as well as relays MR3, Ull, Til, Tl and U2 release their armatures.

The initiated connection is maintained from the device Al by means of the relays LR1 and N2. When the subscriber at device A2 answers, the following circuit is closed: -f, lower winding of relay N2 connected in parallel with upper winding of relay N3 across contact 82, contact 71, wire a, contact a2, wire L2, device A2, contacts 43, 33 and b2, wire b, contact 73, upper winding of the relay NI, contact 88, to minus above the upper contact spring group in the breaker RP directly or in series with the left-three winding of the transformer RGT depending on the position of the breaker. The relay NI is slow-acting and is not affected by ring current, but attracts its armature in the said direct current circuit. Contacts 71—76 are affected. Contact 71 breaks the current for line relay LR1, which, like relay N3, releases its armature. Contact 73 breaks the ring current. The relay N2 releases slowly as a result of the electrolytic capacitor Cl and the relay NI is held with current across the contact 85 through its lower winding. When the relay N2 releases its armature, the relay NI is retained by its slow action until the relay N3 has attracted again in the following circuit: -f, upper winding of the relay N3, contact 83, wire a, contacts al resp. a2, the line II and the device Al resp. the line L2 and the device A2, contacts 23, 13 and etc. resp. 43, 33 and b2, wire b, contact 74, lower winding of relay N3, to minus. Contacts 88—89 end again. The relay NI is then kept energized across contact 89 and the call connection is maintained until both subscribers have hung up their handsets.

If the called device had been busy, the test relay MR3 would not have attracted, but the relay MR4 would have attracted its armature instead, the contacts 441 443 being affected. The following current circuit is formed: +, the winding on the bar magnet SO in fig. 3, the wire m3, the contact 443, the winding of the relay MR5, to minus. The bar magnet S9 releases and the bar magnet SO attracts quickly while the relay MR5 attracts slowly as a result of a capacitor connected in parallel with the winding of the relay MR5. The contact 451 closes the current circuit for the bridge magnet Bl in fig. 3, which attracts. Contacts 21—26, as well as ao, co are affected. The following circuit is formed for holding the line relay LLR1: -|-, a choke D, the contact ao, the wire LI, the device Al, the contacts 23 and 14, the winding on the relay LR1 to minus. The bridge magnet Bl is held with current across the contacts 18 and co. The caller hears a busy tone, which is emitted from a buzzer generator Sul across the capacitor Co. The register and the marker are freed as described above. If the subscriber at the device A2 visits the subscriber at the device Al and wants calls to the device A2 to be connected to the device Al, he calls the area code 09 from the device Al. The call is connected to a register REG as described above and the area code 09 is dialed. The relays EO and ER1 in fig. 5 attracts after the first digit. Contacts e5—e7 and 191—193 are affected. The relay RR7 attracts with current through its lower winding and is then retained with current across contacts 134 and 162 through its lower winding. Contacts 171—173 are affected. After the second digit has also been dialed, relays E19 and ER2 attract. The contacts e31 — e33 are connected. The relay RR5 is energized through its lower winding and attracts its armature. The contact 151 is affected and the current through the relays ER1, EO and ER2, E19 is broken, whereby the register can record two new digits. The registration 09 is marked by the relay RR7, which is kept energized through its lower winding over the contacts 134 and 173. The caller hears a new answer tone, when the relay ER1 releases its armature and the contact 191 closes. The subscriber now dials the number for the device at A2, which is registered through activation of the relays El — ER1 and E12 — ER2. The relays RR8 and G3 attract as described above. Contacts 181 — 187 and 471 — 475 are affected. The following current circuit is formed: +, the winding on the relay R02 in fig. 7 in the vacant switch RO, contact 612, wire kl, the winding of the relay RI, contacts 513, 511—521, wire g4, contacts 184, 172 and 161 to minus. The relays RI—R3 form a relay row, in which only one relay can be switched on at a time. The relays RI and R02 attract. Contacts 511—517 and 621—626 are affected. Relay R04 attracts current across contact 632, wire k3 and contact 515. Contacts 641—648 are closed. At the same time, the calling device Al is marked in the multiple t by means of the identifier, whose relay Dl in fig. 3 receives current via contact 187 as described above, partly the calling device A2 in the multiple u through the current circuits of the relays ull and u2 via contacts e2, 181, 411 and el2, 182, 413.

As a result of the marking in the multiple t, the relays K1 and K21 in fig. 7 in the following circuits: a/ +, the contact 53 in fig. 3, the wire to the connector 731 in fig. 7, upper winding of relay K21, connector 644 to minus.

b/ +, contacts 18, 26 and 51 in fig. 3, wire ten, connector 711, upper winding of relay Kil, connector 642, to minus.

Contacts 711—713 and 731—733 are affected. The relays Kil and K21 are then kept current through their lower winding, the contacts 713 resp. 733, 631 and 622 as well as the winding of the relay ROI, which latter relay is slow to engage and has not yet attracted its armature.

As a result of the marking in the multiple u, the relays K31 and K42 attract in the following circuits: a/ +, contact 411 in fig. 6, the wire gl, contacts 181 and e2, the multiple u, contact 741, upper winding of the relay K31, contact 646, to minus.

b/ +, contact 413, wire g2, contacts 182 and el2, multiple u, contact 781, upper winding of relay K42, contact 648, to minus.

Contacts 741 — 743 and 781 — 783 are affected. The relays K31 and K42 are kept current through their lower winding, contacts 743 resp. 783, 631 and 622 as well as the winding of the relay ROI, which relay now attracts its armature. Contacts 611 — 613 are affected. The following circuit is formed: +, upper winding of relay RR5 in fig. 5, connector 185, wire g5, connectors 401 and 517, wire k6, connector 613, to minus. The relay RR5 attracts. Contact 151 is affected and the register is reset for a second time. The relays El, ER1, E12 and ER2 as well as RR8, G3, RI and R02 release.

The caller hears an answer tone and will now hang up his handset. In switch Ro, the following current circuit is connected: +, contact 705, the winding of relay R07, wire k4, contact 516, to minus. The relay R07 attracts its armature. The contacts 671 — 678 are affected and change the windings of the control relay R08 from the multiple u to the multiple t, which happens because in this case calls to the number marked with the multiple u must be switched, while in other cases, described below for the direction digits 00 and 01, the the multiple t marked number must be monitored.

The relay R08 is designed so that it attracts if its upper winding and its intermediate winding are energized at the same time, which only takes place if both digits of a called number agree with the number registered in the switch for the multiple u, in this case number 12 for the device A2.

If now a subscriber with, for example, the number 22, similar to what is described above for the device Al, makes a call to the device A2, the number 12 is received in the register REG, after which the register is connected to the marker M. The relays Ull and U2 are energized via the contacts e2 respectively el2 in the register REG. The following current circuits are closed at the same time: a/ +, contact 411 in fig. 6, the wire gl, the contacts 181 and 2e, the multiple u, the contacts 742 and 676 in fig. 7, upper winding of relay R08, to minus.

b/ +, contact 413, wire g2, contacts 182 and el2, the multiple u, contacts 782 and 678, the intermediate winding of relay R08, to minus.

The relay R08 attracts its armature. The contacts 681 — 685 are closed. The following current circuit is formed: +, contacts 681 and 621, wire s3, the winding of relay MR1, to minus. Contacts 411 — 414 are affected. The marking current circuits are switched from the wires gl and g2, which go across the register, to the wires sl and s2, which go to the switch RO. Relay R08 is energized through its lower winding, contact 682, wire s4 and contact 475.

The following circuits are formed:

a/ +, the contact 412, the wire sl, the contacts 684, 672 and 712, the multiple u, the winding of the relay Ull, to minus.

b/ -f-, connector 414, thread s2, con-

bars 683, 674 and 732, the winding of the relay Ul, to minus.

The relays Ull and Ul attract. Contacts 211 — 213 and 210 end. A free string line SN is selected and its bar magnet, for example S9, attracts, as described above. The relay MR2 attracts. The listener relay MR3 is connected via contacts 421, 210 and 211 to the wire pli of the associated device-Al. At the same time, the calling subscriber line is identified by the identifier D, since when calling from number 22, relays T12 and T2 attract.

If the device Al is free, the listening relay MR3 attracts. Contacts 431 — 433 are affected. The bridge magnet B1 and the bridge magnet corresponding to wire p22, which for reasons of space are not drawn in fig. 3, pulls and the calling line and the line LI are connected to the cord line SN. The ringing signal goes to the device Al. The caller has thus automatically been connected to the device Al, as he dialed the number for the device A2.

When the subscriber at the device A2 leaves the space for the device Al, he cancels the switch by dialing the area code 01 and then his own number. Canceling can be done from any device within the telephone exchange. When the direction digit Ol is registered in a register REG, the relays EO, ER1, RR7 and Ell, ER2 attract. Relays RR5 and RR6 attract in the following circuit: -|-, contacts e7 and el3, upper winding of relay RR6, lower winding of relay RR5, to minus. Contacts 161 — 163 and 151 are affected. The registration relays EO, ER1, Ell and ER2 release while the relays RR6 and RR7 are kept energized through their lower windings and the contacts 163 and 163 respectively. 173. The subscriber hears a new answer tone when the contact 191 is closed.' The subscriber then dials his own telephone number, in this case 12, which is registered in the register REG when the relays El, ER1, E12, ER2 are switched on. The relays RR8 and G3 are now given time to attract. Contacts 181 ■— 187 and 471 — 475 are affected. The above-mentioned circuits for switching on the relay R08 in the switch RO set for number 12 are closed. The relay R08 in fig. 7 attracts. Contacts 681 — 685 end. The following circuit is formed: +, contacts 162, and 186, wire g6, upper winding of relay R03, contact 685, to minus. The relay R03 attracts. Contact 631—635 is affected. The relays Kil, K21, K31 and K41 release. The following circuit is formed: +, the winding of the relay RR5, contact 185, wire g5, contact 401, wire k5, contact 633 to minus. Relay RR5 attracts, contact 151 is affected. The relays El, ER1, E12, ER2, RR8 and G3 release. The subscriber listens to a new answer tone and must now hang up his handset. In the switch RO, the relays R03 and R08 and finally ROI, which are slow-acting, release, after which the switch RO is free.

With the help of talking machines, additional switching possibilities can be achieved by the invention. A speech machine Tl in fig. 3, which when it is started emits a specific message, for example "Absent, call the information", has been assigned an area code 02. It is now assumed that the subscriber at the device Al with the telephone number 11 will be away for a while and wishes that said notification must be given by calling his device. He then calls the area code 02 from his device Al. The digit 02 is registered in the register REG fig. 5 when switching on the relays EO, ER1, Ell, ER2 and RR7. The contacts e5—e7, e21—e22, 171 — 173 as well as 191 — 193 and 195 are affected. The relays RR8, G3 and, for example, RI are affected, as described above, whereby a free switch RO is selected. The relays R02 and R04 in the switch according to fig. 7 attracts.

The calling device Al is identified by activation of the relay Dl in fig. 3 as described above and is designated in the multiple t by means of the threads ti and more. The relays Kil and K21 in fig. 7 attracts. Contacts 711 — 713 and 731 — 733 are affected. At the same time, the number 01 in the multiple u is marked through the following circuits: a/ -f, contact 411, wire gl, contacts 181 and e6, the multiple u, contact 701, the winding of the relay K30. Contact 645, to minus.

b/ +, contact 413, wire g2, contacts 182 and e22, the multiple u, contact 781, the winding of the relay K42, contact 648, to minus. The relays K30 and K42 in fig. 7 attracts. Contacts 701 — 705 and 781 — 783 are affected. The relay ROI attracts in the holding current circuit across contacts 622, 631 and 713, 733, 703 resp. 783. The relay RR5 in fig. 5 energizes contacts 185, 401, 517 and 613 and resets register REG by affecting contact 151, so that relays EO, ER1, E12, ER2, RR8, G3 and RI release. The subscriber listens to a new answer tone and must now hang up his handset.

Calls to the device Al are then automatically connected to the voice machine Tl. It is assumed that a call is made from the device A2 to the device Al. The number 11 is hereby registered in the register REG, by the relays El, ER1 and Ell, ER2 attracting. The relays RR8 and G3 attract. The following circuits are formed: a/ +, contact 411, wire gl, contacts 181 and e2, the multiple u, contacts 712 and 671 in fig. 7, upper winding of relay R08 to minus.

ta/ +, contact 413, wire g2, contacts 182 and el2, the multiple u, contacts 732 and 673, the intermediate winding of relay R08 to minus.

The relay R08 in the switch which has registered the subscriber number 11 attracts. Contacts 681 — 685 are affected. Relay R08 is maintained with current through its lower winding. The relay MR1 in fig. 6 receives current via contact 681. Contacts 411 — 414 are affected. The following circuits are formed: a/ +, contact 414, wire s2, contacts 683, 675 and 702, the multiple u, the winding of the relay UIO, to minus.

b/ +, contact 412, wire sl, contacts 684, 677 and 782, the multiple u, the winding of the relay u2, to minus.

The relays UIO and U2 attract. Contacts 201 — 203 and 220 end.

In the meantime, a free string line SN has been selected as described above and the relay MR2 engages the listening relay MR3 in the following circuit: +, contact 441, upper and lower winding of relay MR3, contact 421, wire v2, contacts 220 and 202, wire p3, the winding on the bridge magnet B3 in fig. 3, to minus. If the talker Tl is idle, the listening relay MR3 attracts. Contacts 431 — 433 are affected. The bridge magnet B3 attracts in the listening current circuit after the upper winding of the relay MR3 is short-circuited. The contacts a3, b3, c3 are affected.

At the same time, the calling device A2 is identified as described above by switching on the relay D1 in fig. 3, and relays T2 and Til have attracted so that contacts 320 and 312 are closed. The bridge magnet B2 attracts. The contacts 31 — 36, a2 — b2 are affected. The relay LR2 is held in series with the relays N2 and N3 in the string line and a ringing signal is sent to the voice machine Tl according to what has been described above. In this case, the ringing signal is broken immediately through the following circuit: -f-, lower contact of the interrupter RP, wire f3, choke coil Zl, rectifier rel, contact b3, wire b, contact 73, upper winding of the relay NI, contact 88, upper contact spring group on the breaker RP, to minus, directly or over the transformer RGT. The relay NI attracts. Contacts 71 — 76 are affected. Line relay LR1 and relay N2 release. The device Al is connected to the talking machine Tl via the contacts a2, b2, a3, B3. The talking machine Tl is set in motion by relays which receive power via contact c3.

After the caller has listened to the voice machine's message, he hangs up his hand-held microphone, so that the circuit across line L2 and device A2 is broken. As soon as the interrupter RP hereafter affects its lower contact, the current is also broken through the choke coil Dl and the lower winding of the power supply relay N3. Relays N3 and NI release and the connection is disconnected.

The speech machine T2 in fig. 3 belongs to a group of voice machines that share the area code 00, and is arranged so that a subscriber can speak an arbitrary short message on one of the voice machines, after which all calls to the subscriber's number are switched to this voice machine and receive this message.

If, for example, the subscriber with number 11 wants to close his device Al by switching all incoming calls to a voice machine T2, which automatically answers with a ring, he calls the area code 00 from the device Al. The number 00 is registered in the register REG by the relays EO, ER1, E10, ER2 and RR7 attracting. Contacts e5—e7, 191 — 193, e41—e42, 195 and 171 — 173 are affected. The relays RR8, G3 and for example RI and R02 as well as R04 attract. Contacts 181 — 187, 471 — 475, 511 — 517, 621 — 626 and 641 — 648 are affected. The calling device's number is identified, designated in the multiple t and registered in the switch RO, whereby the relays Kil and K21 attract. The direction number 00 is designated in the multiple u through current circuits above the contacts e6 and e42, and is also registered in the switch RO by the relays K30 and K40 attracting. The current circuit for relay K40 passes contacts 413, e42, multiple u, contacts 652 — 662, 771 and 647. Contacts 711 — 713, 731 — 733, 701 — 705 and 771 — 774 are affected. During the switch-on time of the relay ROI, a free speech machine T2 is selected, for example through the following current circuit: -f, contacts 704, 774, 625, wire f4, partly through contacts 494, 484, 482, the winding of the relay Fl, wire fl, the contact 602, to minus, partly through the winding on the relay Fo, to minus. The relays Fl — F2 form a relay row in which only one relay at a time can attract. It is assumed that the relay Fl and the relay Fo attract. Contacts 481

— 486 as well as 400 — 404 are affected. Only then does the relay ROI attract and affects contacts 611 — 613. The relay R06 attracts in the following circuit: -f-, contact 481, wire f3, the winding of relay R06, con-

beat 635, to the minus. The contacts 661 — 663 attract, whereupon the relay R06 is held in the following circuit: +, the relay FREE in fig. 3, the wire f2, contact 663, the winding of the relay R06, contact 635, to minus. Contact 400 closes a circuit across wire f6 and contact 624 for relay R08 and contact 403 closes a circuit for relay MR1. The relays R08 and MR1 attract. Contacts 681 — 685 and 411 — 414 are actuated, whereby the marking current circuits of the multiple u are switched from the register REG to the selected switch RO. The contacts 404, 485 and 402 complete the circuit through the relay MR2 and the wire m2 for selecting the free cord line SN. The relays MR2 and Hil as well as the bridge magnet S9 are assumed to attract.

As can be seen from fig. 7 connected to the marking wire for the digit combination 00, while the voice machine corresponding to the relays F2 and R05 is thought to be connected to the marking wire for the digit combination 09, which, according to what has been described above, is not used for any subscriber line or other voice machine. The following circuits are closed for marking the selected talking machine T2: a/ +, the contact 414, the wire s2, the contacts 683, 675, 702 the multiple u, the winding of the relay ulO, to minus.

b/ +, contact 412, wire sl, contacts 684, 677, 772, 661, the multiple u, the winding of the relay uo, to minus.

Contacts 201 — 203 and 230 are affected. The listening relay MR3 is connected via the contacts 421, 230, 203 and the marking wire p4, to the bridge magnet B4 in fig. 3, and attracts. The contacts 431 — 433 are affected and the bridge magnet B4 attracts. The contacts a4, b4, c4 terminate. At the same time, according to the description above, the calling subscriber Al is identified and designated by switching on the relays Til and Tl, as the bridge magnet Bl also attracts. The contacts 21 — 26 and al — cl are affected. The device is then connected to the voice machine T2. The relays N2 and N3 attract in series with the line relay LR1. The ringing signal is broken by the relay NI attracting in the following circuit: + , lower contact in the interrupter RP, wire f3, choke coil Z2, rectifier re2, contact b4, wire b, contact 73, upper winding of the relay NI, contact 88, upper contact f spring group i the interrupter RP, to minus.

The talking machine T2 and the amplifier TF2 are started by relays TFR, which carry current across contact c4. The caller hears a short tone signal and then has 30 seconds to speak a message. A current pulse is then sent from the talking machine to relay FR2, which attracts its armature. The contacts 61 — 69 are affected, whereupon the relay FR2 is held with current across the contacts 69 and 601. The input and output side of the amplifier TF2 is switched by the contacts 61 — 68 and the caller can listen to the recorded message. The subscriber must then hang up his handheld microphone.

If there is no idle telephone T2 when relays K30 and K40 in switch R energize, relay FO but none of relays Fl — F2 will energize. The following current circuit is formed: +, lower winding of relay R03, contact 626, wire f5, contacts 496, 486 and 404, to minus. The relay R03 attracts. Contacts 631 — 635 are affected. The relays R04, Kil, K21, K30 and K40 release. The relay Fo is held with current across the contact 634. No connection is established until the relay MR4 in fig. 6 attracts. Contacts 441 — 443 are affected. The relay MR5 and the bar magnet SO attract. The bridge magnet Bl attracts and the device Al is connected to the buzzer generator Sul and hears a busy tone.

If the voice machine T2 was free and a message was received by the subscriber with number 11, from now on all calls to number 11 will be automatically connected to the voice machine T2 and saved with the said message. It is assumed that a call comes from device A2 to number 11. The line relay LR2 attracts and the wire L2 is connected to the register REG as described above for device Al. The subscriber dials the number 11 on his dial and the number is registered by the relays El, ER1, Ell and ER2 attracting. The relays RR8 and G3 attract. The calling device A2 is identified and designated, whereupon the relays Til and T2 attract. The called number is designated in the multiple u, as first the relays ull and ul attract, at the same time that the relay R08 in the switch in fig. 7 attracts. The relay R08 is maintained with current through its lower winding, and the relay MR1 in fig. 6 switches the marking from the register REG to the switch RO, as the relays Ull and Ul release, and instead attract the relays UIO and UO. A string line SN is selected and the relays MR2 in fig. 6 and Hil in fig. 4, as well as the bar magnet S9 in fig. 3 is believed to attract. The listener relay MR3 attracts, if the speech machine T2 is free. The bridge magnets B2 and B4 attract, whereby the device A2 is connected to the talking machine T2. The ringing signal is interrupted and the talking machine T2 and its amplifier TF2 start. The caller hears the message given by the voice machine, which is repeated until the subscriber hangs up his hand-held microphone, whereby the connection is disconnected and the voice machine stops.

Claims (2)

1. Coupling device for automatic referral of calls in an automatic telephone system which contains, in part, subscriber lines (LI, L2), selectors (BLI—BL4), registers (REG), a call identification device (D) and a marker (M) for connecting connections over said selectors, part of a number of switches (RO) for monitoring and switching calls to subscriber lines connected for reference, characterized by a first common multiple (u) for all switches with marking wires for marking calls to a telephone number registered in a the marker connected register, and another, for all switches common multiple (t) with marking wires for marking the number of an identified calling subscriber line, a registration device (K10— K21, K30—K40) for each of said multiples in each of said switches for in the case of a preparatory call that begins with a special area code, by means of signals on the marking wires in said multiples, to record partly the number for a subscriber line if received mende calls shall is referred to another line, then the number of another line to which the call is to be referred, as well as by a control device (R08) in each switch, which is influenced by means of circuits above said first multiple when calls are marked to the subscriber line registered for referral and by a relay (MR1) in the marker which in turn is affected by the switch's control device and which switches the marker's current circuits so that when calling a subscriber line registered in a switch for reference, partly to mark the number of the other line registered in the same switch in the first multiple, partly to disconnect the other marking that has affected the switch's control device. 2. Switching device according to claim 1, characterized by a changeover relay (R07) in each switch which switches said control device from one to the other of the switch's registration devices depending on whether a subscriber number or an area code has been marked in the first multiple and has been registered in the registration device corresponding to this multiple in the switch.