CH277165A - Automatic telecommunications installation for communications operated with alternating current. - Google Patents

Description

<B>Installation of</B> automatic telecommunications for communications operated <B>in</B> alternating current. In known systems of automatic telephony or telegraphy, provision is made for a feeder bridge located preferably at the point of the transmission chain where the number of components is the least high, that is to say. generally say Jans the connection circuit, because it is these latter circuits which are the least numerous in an Office.

This arrangement offers the advantage of reducing to a minimum the number of complicated circuits able to provide the various functions such as supervision, call, release, etc.

However, among the communications carried out by the connection circuits, there are several categories such as, for example, local, long-distance, regional, suburban communications, calls from information operators, complaints, etc. However, the mode of exploitation of each of these categories may be different.

Furthermore, of all communications going to distant offices, some are carried by direct current circuits, others by alternating current circuits.

All these differences lead to multiple cases of use of the connection ciruits, which must be adapted in turn to these cases and therefore take on such a complicated form that the savings made by placing the power supply bridge therein becomes ilusory. It is then preferable to place these supply bridges at points such that the expense resulting from the increase in their number is largely compensated by their simplification, in particular when each bridge provides only one single type. Communication.

In the installation according to the present invention, the supply bridge is not placed in the first connection circuit.

It is, on the other hand, essential, in any communication, to ensure, as completely as possible in each Bureau, the Supervision of the position of the subscribers of the other Bureau, in order to allow the transmission to the the requesting subscriber, at the appropriate time, audible signals indicating to him the stages of the routing of his communication and, above all, in order to properly ensure the release.

It is important, in particular, to ensure the release, as soon as possible, of the maximum number of circuits in the event of incomplete release, that is to say by only one of the two subscribers in connection. Most of the known systems do not give such a possibility, because RTI ID="0001.0268" WI="3" HE="4" LX="1659" LY="1972"> the maintenance of the chain is often under the total control of one of the subscribers: requesting subscriber, or more often requesting subscriber, or sometimes even both.

It is therefore necessary for each Bureau to know the position of the subscriber from its own Bureau and that of the subscriber from the distant Bureau by means of as complete a supervision system as possible.

It is also known that when it is necessary to connect two subscribers belonging to very distant offices, it is no longer possible to count on the correct operation of the direct current circuits. It is then common practice to use the alternating current to exchange the dialing or supervision signals.

The installation according to the invention, which relates to. This last row allows permanent supervision, at the Office of departure, of the position of the subscriber of the Office of arrival. It also makes it possible, by sending suitable impulses, to cause the requesting Bureau to carry out Supervision and also counting, except in the ras where the requesting subscriber Response from the subscriber with charging Response from the operator without charging Triggering of counting at the operator's discretion Supervision of the answering of the subscriber request Release by the requesting Bureau The use of such a Code requires a set of circuits capable of composing the two Long Pulses. Moreover, to avoid release by a brief interruption on the part of one of the subscribers, it is necessary to slightly defer this release.

This set of conditions leads to circuits which might possibly be too complex to be incorporated into the starting groups.

The installation will therefore preferably include a common release device. several groups, which makes it possible to give it a much better yield, this device also comprising circuits making it possible to defer the release in order to free oneself from accidental cuts on the part of one or 1 ' other of the two subscribers.

The appended drawings show, by way of example, one embodiment of the device according to the invention. reached a special non-taxable service.

It makes it possible to obtain taxation at the will of the subscriber reached when the latter is uruni Tun a.pproprie equipment.

According to the invention, the first office at which the first applicant is received has a device; containing the power supply bridge and such that the response of the subscriber request causes the supervision of this subscriber and the start of the counting by sending two pulses of alternating current and the supervision without counting by sending with a single Pulse.

Each Office can therefore have the Supervision of 1a. position of the remote subscriber by use of a Pulse Code.

The eode used could be, for example. next: = 2 short RTI Pulses ID="0002.0272" WI="11" HE="4" LX="1382" LY="1055"> = 1 Pie Pulse = 1 second Pie Pulse = Short pulses at rapid rate until release by the requesting Bureau = 2 long impulses.

fig. 1 is a diagram of the complete chain of Linkage organs.

fig. 2 represents the Departure Office supply and metering equipment.

fig. 3 shows the multi-circuit joint release device.

fig. 4 represents the supply equipment at the 6th Arrival Office.

The numerical reference designating a relay contact Will be preceded by the letter R when the contact is at rest and. of the letter T when he is at work.

fig. 1 ei-annex is. a diagram representing, in sequence, the complete chain of devices used to set up a call from a requesting subscriber A located at the office of departure <I>DE,</I> up to the requesting subscriber B at the Office of arrival <I>AR.</I> This call uses: Calling subscriber equipment A. LTn requires connection CC1 to the office of departure.

A starting group GD ensuring the power supply of the applicant and the Supervision functions described below.

A connection circuit between the two offices, terminated by equipment C1 and C2. A CC2 connection circuit at the 6th Arrival Office.

An incoming group GA ensuring the supply of the requested subscriber and the Supervision functions in conjunction with the outgoing group GD.

Subscriber equipment B.

The chain is put in place by means of the ED and Ei recorders which immediately release the Oriented Organs and do not intervene for the Supervision.

At the end of communication, if an on-hook fault occurs for one of the subscribers, the supply groups GD and GA are freed by the occupation groups <B>01</B> and 02, according to subscriber at fault, by sending two long pulses from the office of the requesting subscriber, by means of the release device L.

Figs. 2, 3 and 4 represent respectively the parts of the installation represented schematically in GD, <I>L</I> and CTA In fig. 1. <I>I.</I> Office <I>of</I> departure.

fig. 2 represents the Departure Office supply and metering equipment. The operation of the device according to this figure Best 1e following: <I>Taking the</I> selector.

The recorder, after having set the digits making it possible to discriminate the direction to be taken, causes the rotation of the routing selector.

In its rotation, the latter explores the pins constituting its benches.

When it passes over a free selector serving the desired direction, the control circuit is closed by: wire C, R 42', control towards the recorder. The test circuit is established at the same time by: wire T, R45, resistance of 1000 Ohms, rest position of Cl, rest position of C2, R 46', jack, earth.

The recorder, having recognized the free selector, causes its orientation.

For this purpose, a battery is placed on the B wire. The selector turns by: B wire, R 44, contact breaker and selector coil, earth.

When the selector passes over a next free selector, the control circuit is established by: wire S, R 41', relay 4, wire C, recorder.

The test circuit is established by: wire A, R 43, R 66, wire T, next selector.

The recorder causes an overcurrent in the control circuit.

This overcurrent allows relay 4 to operate on its 50 Ohm winding. Relay 4 is energized and remains stuck by: Battery On wire <I>T, T 41,</I> resistance of 1000 Ohms, relay 4, ground.

Engaging relay 4 has the effect of extending the wires to the next selector to allow the selections to be executed until the outgoing circuit.

When the recorder performs the following selections, it also removes the tax indicator.

For this purpose, it sends pulses on the 1st wire C, these are received on the 1st switch C2 by: wire <I>C, T 43',</I> R 63', .switch ( '2, the 45', recorder.

When the recorder has received the indication that the subscriber is reached in the remote office, it connects the feed bridge and frees itself.

The connection is made on the 1st wire C by: wire C, T 42', R 61', relay 2, connection wire to the recorder.

Relay 2 is energized and remains at work by: earth, T 44', T 24, relay 2, Battery.

Relay 2 causes relay 1 to energize by: earth, relay 1, <I>T 24', R</I> 66', relay 1, Battery.

Relay 6 engages by: earth, T 14, relay 6, resistor, Battery. The calling subscriber is powered by: wire A, T 43,<I>T</I> 62,<I>T</I> 23, relay 1, Battery, wire B, <I>T</ I> 44, <I>T</I> 63, <I>T</I> 23', belay 1, teere.

Moreover, it perceives the 1st call return by: econdenser, R 34',<I>T</I> 21,<I>T</I> 43, f il A.

The device is awaiting a response from the subscriber's request.

Two ras are then ä, consider: <I>1.</I> Appet of a normal abo7vize giving licu <I>ä,</I> taxation.

To the. response, as will be described later, the Remote Office sends two Earth Pulses on the S wire.

At the beginning of the First Pulse, the 1st relay 5 is executed by: tee on the S wire, T 61, T 21', R 32', relay 5, Battery.

At the end of the pulse, the 1st relay 5 is maintained and the 1st relay 3 is executed by: teere, <B>T51,</B> relay 3, T22', relay 5, Battery.

At the beginning of the second Pulse, the 1st relay 2 re-energizes in opposition to the Good upper winding flow supplied by: tee on wire S, T 61,<I>T</I> 21',<I>T</ I> 32', relay 2, Battery.

The circuit of relays 3 and 5 is broken at <I>T 22'</I> and <I>T 21'.</I>

Relay 5 is maintained by: tee on 1st wire S, T 61, R 21', relay 5, Battery.

Relay 3 is maintained by: teere, T 34, relay 3, R 22', resistor, battery.

At the end of the pulse, relay 5 drops out. Relay 3 drops out, short circuited by R 51.

The conversation is established by: thread <I>A, T</I> 43, R 21, R 31, thread .:1; yarn B, <I>T</I> 44, R 22, R 32, yarn B.

The chain is maintained by: input side: wire <I>T, T</I> 45, <I>T</I> 65, resistor, battery; request: wire <I>T, T</I> 64, resistor, battery.

Finally, charging is started by the following circuits. Switch Cl is started by eame 7S,5, R 35', R 26, 12, Cl, Battery.

The switch C1 advances step by step and completes one revolution in the time corresponding to the unit of conversation time.

When it passes to the penultimate Position, a signal is sent to the subscriber to warn him of the end of the interval by: tone TN, capacitor, bank of C1, T43, wire < l..

When the time has elapsed, the counting impulses are sent to the counter by: wire S, T 41', T 62', 1' 13, R 25, R 35, Cl in Position 2, brush of C2 in the corresponding Position ing to the number of units, wire of pulses of sign6 by the Position of C2. <I>2.</I> Call from u,)i, ser-vice <I>does</I> not take place <I>ä,</I> charging. In this case, 1a. response from inande's subscriber only causes one Beule Impulse to be sent.

This pulse, received on wire S, causes relay 5 to switch on by: tee on wire S, <I>T</I> 61, <I>T 21',</I>R 32', relay 5, Battery.

At the end of the pulse, the 1st relay 3 is executed in series with the 1st relay 5 by: tee, T 51, relay 3, T 22', relay 5, Battery.

The eonv ersation is established by: wire A, <I>T</I> 43, T 21,<I>T</I> 31, wire:1; wire B, <I>1'</I> 44, <I>T 22,</I> T 32, wire RTI ID="0004.0263"WI="4" HE="3" LX="1179" LY ="1205"> B.

Charging is not triggered, because the 1st cam wire 7s.5 is cut into R 26 and R 35'. Libe7-a.tion..

First case: Reconnection <I>of</I> the caller: When the caller subscriber is picked up again, the 1st relay 1 drops out by opening the loop.

Relay 6 is maintained by: teere, T 65', relay 6, resistor, battery.

The charging is stopped by opening the T-cam wire 12.

The release of the group must release all the gears in Grapple by sending two long impulses.

For this purpose, the 1st group is called and an auxiliary device comes to connect and operates the release.

The fall of relay 1 causes the release device to be called by: teere, l'64', R 11, 1000 ohm resistor, 3000 ohm resistor, starting of the release device.

The same circuit prepares on the pin 17 of the top of the release device a stop polarity. The detailed operation of the release device will be deerit elsewhere.

When the latter has connected to the selector, the two long pulses are sent on the S wire and cause the release of the Remote Office Organs.

A ground is then put on the first wire L. This last one short-cireuite the first relay 4 which falls down.

The Battery which held the chain in Engaged is suppressed on the T wire by: Z' 45 for the requesting summer.

Moreover, the first relay 6 is short-circuited by R42 and drops out.

The wire <I>T</I> cötg requested is eoupg in<I>T</I> 64. The switch C1 comes to rest on the ground, R 44', brush and sector of C1, breaker, coil and Battery.

Switch C2 returns to rest by: earth, jack, R 46', brush and sector of C2, contactor and coil, R 63', . R 43', resistance, drums.

The selector is available for a new conversation. Second case: On-hook age <I>of</I> request: As will be discussed later, hanging up of the request causes the sending to the requester of a series of short pulses up to upon release by the applicant.

These pulses arrive in the form of ground on the 1st wire S.

Law:Sque These inipulsions are received; 1st relay 5 is executed by: earth on wire S, T 61, R 21', relay 5, Battery.

Relay 3 is energized by: earth, T 51, relay 3, R 22, resistance, Battery.

1.e relay 3 is maintained by: earth, T 34, relay 3, R 22, resistance, Battery.

During the following pulses, the 1st relay 5 remains in the Bonding state thanks to its short-circuit winding by T 52.

The counting circuit is open at R 35'.

If the requestor is racially bound, relay 1 drops out and the operations proceed as before. If the caller does not hang up, the group goes into Position to call the busy device by: land, T 64', T 11, <I>R 25', T</I> 33 ', resistance of 1000 ohms, resistance of 3000 Ohms, start-up of the positive device for occupancy.

This one is silent in search and connects thanks to the stop polarity prepared on the 1st bank 11 by: ground, T64,*, T 11, R25', 1' 33', resistance .of 1,000 Ohms, wire M.

When the requesting subscriber has been recognized and forwarded on a false call, an earth is placed on wire L. This causes the release device to be called and the operations then proceed as in the previous case.

fig. 3 represents an example of embodiment of the release device.

As has been explained in the preceding lines, a switch having to release a circuit presents RTI ID="0005.0272" WI="6" HE="4" LX="1351" LY="1020"> a ground on the 1st start wire.

The starting relay is energized: Relay 4 (fig. 3) is energized by: earth, 17M1, rest position of switch 50, R 42, relay 4, battery.

Relay 2 picks up with a certain delay. The search engine is started by: earth, <I>T 24, T</I> 41', switch, coil, Battery.

When the searcher encounters a selector on call, relay 4 drops out, its second winding being supplied by: fii:17, T22, relay 4, Battery.

Relay 1 is energized by: earth, T 24, R 41', R 31, relay 1, Battery.

Relay 3 is energized by: ground, T 11, relay 3, Battery.

Switch 150 is armed by: Ground, <B>T32,</B> Coil, Battery.

Relay 3 cuts at R 31 the 1st relay 1 which drops out and the two relays 1 and 3 thus beat by advancing the 1st switch 150.

When the latter has come to Position 1, the 1st relay 2 is maintained by: earth, bench <I>c, d, e, </I>, f of the combiner, R 43, T 21, relay 2, Battery.

When the 1st combiner arrives in the rest position of bank a, the 1st relay 6 is energized by: earth, Position 0 of bank <I>a, T</I> 25, relay 6, Battery. Relay 6 is maintained by: earth, bank <I>c, d, e, f, T</I> 66, relay 6, battery.

Relay 4 is shunted by the 100 ohm resistor switched on by contact 64 and rises.

Relay 2 is cut at R 43 and drops out. Relays 1 and 3 remain. earth-fed, T 65.

The release pulses are then sent by: earth, bank a., T 63, wire S. When the two pulses are sent, the combiner is in position 0 of bank b. A release earth is placed on the <I>L</I> wire by: earth, bank b, T 62, wire <I>L.</I>

This earth is maintained until the combiner has crossed the entire bench b and has come into the rest position. In this position, relay 6 is cut and drops out. The device is then available for a new<I>cycle</I> of operations.

II. Arrival office.

The fi-. 4 represents the arrival selector with bridge. of supply in the ter minal office, working in liaison with the group represented on the fi-. 2.

When the recorder orients the connection circuit selector and the latter switches to an available group, the control circuit is closed by: pin C of the connection circuit selector bank, 1, 22', control wire to the recorder.

At the same time, the test circuit is established by: pin T,<I>R23,</I> R 3â', resistor, jack, ground.

The recorder, having recognized an available selector, ensures its orientation.

For this purpose, he puts a battery on wire B. The selector turns by: battery on wire B, R22, breaker and coil, earth.

When it passes to a next available selector, the control circuit is established by: pin S, R 21', relay 2, brush C.

Similarly, the test circuit is. established by: pin J, R 21, R 34, brush T. The recorder then causes an overcurrent in the control circuit. Relay 2 picks up through its 50 ohm winding and is held by: battery on wire T, <B>T23,</B> relay 2, ground.

The different threads are then extended for the successive selections remaining to be made by: thread .1, 7'21, R 31, thread -t; wire B, T 22, R32, wire B; wire<I>T,</I><B>T23,</B> lower winding .of 2 and ground; wire S, <I>T 21' R 31',</I> wire S.

When the subscriber is reached, the recorder ensures the connection of the group. Relay 3 is activated by: wire C, T 22', relay 3, <B>CO</B> connection wire to the recorder.

Relay 3 is maintained by: earth,<B>T23',</B> T 34', relay 3, resistor, battery. The recorder then releases.

The selectors of the following stages are held on the T wire powered by: battery, resistor,<I>T</I> 33, wire<I>T.</I>

The called subscriber is rang by: resistance, R 64',<I>R 52, T 32,</I> wire B, subscriber's line and extension, wire: 1, T 31, R 51, R 61', relay 4, battery.

When the called subscriber picks up, the relay 4 picks up on the loop presented by the subscriber and following the same circuit as the inrush current.

Relay 4 is maintained by: earth,<B>T32',</B> <I>R 53', T 41,</I> relay 4, battery.

The cam circuit is established. At the beginning of the. first pulse, relay 6' is energized by: earth on<I>AC, T</I> 43,<I>R</I> 55', R 61, relay 6', battery.

At the end of the pulse, relay 6 is energized and 6' is maintained by: earth, T 32', T 63', relay 6, relay 6', battery.

The called subscriber is supplied through the 1st relay 1 which energizes by: earth, relay 1, <I>T</I> 62', <I>T</I> 31, wire A, loop of the subscriber, wire<I>B,</I> <B>T32,</B><I>T</I> 66', relay 1, battery.

At the start of the second pulse, relay 5 is energized by: earth on Cl, 1'43, <I>T</I> 62, T 61, R 51', relay 5, battery.

At the same time, a first pulse is sent on wire 8 to the caller's office by: earth on C.1, T44, T 63, T31', T 21', wire S.

At the end of this pulse, relay 5' is energized by: earth, T32', T42, 7'53, relay 5', relay 5, battery. Relay 4 drops out, cut in R 53'. At the third pulse, relay 6', thanks to its delay, does not drop out by flow opposition.

binds relay 6 is maintained by the same circuit.

1:n at the same time, a second pulse is sent to the requesting circuit by: ground,<I>T</I> 52',<I>T</I> 11',<I>T</I> 63 ,<I>T</I> 31', T21', wire S.

At the end of this pulse, relay 6 re drops. The conversation is established. The pulses on the cam wire are inoperative because: T 62 is open (relay 6 at rest); R 55' is open (5' relay at work).

Similarly, no pulse reaches wire S because: earth 44 is open (relay 4 at rest); R 11' is open (relay 1 at work); <B>T63</B> is open (relay 6 off).

The connection between the two subscribers is established by: wire A,<B>7'21,</B><I>T</I> 12, wire 11; wire B, 1'22, T 13, wire B.

On-hook <I>of</I> the called party: When the loop is opened by hanging up of the called party, relay 1 drops out. Short pulses are sent to the requesting office by: ground on AC,<I>T</I> 52', R 11', <I>R 63, T</I> 31',<I>T< /I> 21', wire S.

The outgoing equipment of the caller's office sends, as already described in the previous lines, two long pulses. These are received in circuit equipment., not described here. This cuts the power supply to wire T. Relay 2 no longer finds a holding circuit and drops out. Relay 3 drops in turn by opening T 23'.

By opening at 7'33, the chain is released on the requested side. Finally, the opening of T32' releases all the relays engaged.

<I>caller</I> hanging up: As already described in connection with the fi,-. 2, when the caller hangs up, the key sends two long pulses.

These, fed into the circuit equipment, cause relay 2 to drop by a pure cut in the power supply of wire T, the drop of relay 2 causes the call of an occupancy device by the following circuit: ground, R 23', T 54', resistor 1000 ohms, resistor 3000 ohms, start wire.

The busy device finds a stop polarity prepared on pin 1Z by the same circuit.

He recognizes that it is the called subscriber who has remained picked up by the circuit: battery, resistor, <I>T</I> 33, R 24', wire T2.

The busy device then searches for the called party and forwards it to a false call via circuits that are not described and do not fall within the scope of the invention.

When the latter is found, the occupancy device places a ground on wire L. The latter short-circuits relay 3 which drops out.

As described for hanging up the called party, the drop of relay 3 releases the whole group and brings all the relays back to rest.

Claims (2)

CLAIM: Installation of automatic telecommunications, for communications operated in alternating current between two subscribers belonging to remote offices, characterized in that the office to which is. connected to the caller includes a device containing the power supply bridge and such that the response of the called subscriber causes the supervision of this. subscriber and the start of counting by sending two alternating current pulses, and supervision without counting by sending a single pulse. SUB-CLAIMS: 1. Installation according to claim, characterized in that the release is obtained by means of an additional device serving several circuits. 2. Installation according to sub-revendicatlon 1, characterized in that the device con holding the supply bridge also ensures the release, and this only for a certain time after hanging up by at least one of the two stations in communication.