DE2046744A1 - Arrangement for the timely query of waiting calls in telephone systems - Google Patents

Description

R.S. Lecoanet et al 5.1 Arrangement for the timely query of waiting people Telephone calls.

In the case of telephone systems, where the connections are made by operators can not be avoided that a certain waiting time in the main hour of operation occurs. The placement staff are all occupied and the calls pile up. As soon as an agent becomes available, she will serve you of waiting calls. When the call to be served is selected by random selection from the calls are pulled out, some of them may wait a long time to be served wait while others are served with almost no waiting time. It is therefore desirable if the calls are served in the order in which they arrive. Needed for that however, one means to classify the calls to identify the oldest call and to signal to him that he will be served first.

The invention is based on the object of an arrangement for timely To create query of waiting calls in telephone systems. This is according to the invention achieved in that a first clock-controlled in a common device Counter is provided, which determines the current time stage that at a incoming call in a facility assigned to the calling line The current reading of the first counter is stored in a second counter is provided; who then advances one digit each time all calls are made with the currently set time step are queried that in the line facilities the stored value with the position of the second counter in a comparison circle will compare and that if the two values are equal, the call is forwarded will.

R.S. Lecoanet et al 5.1 The invention is now based on the in the Embodiment illustrated in the accompanying drawing is explained in more detail.

In the drawing are a line device EA and a common Facility EC shown. The multiple arrows between the two bodies show that several line devices EA in parallel with the common device EC are connected.

The various circuits are built up with relay contacts and diodes. A relay is represented by a rectangle with the connections on both sides are brought up to one or two windings. It is by two lower case letters marked. According to the representation chosen, those are controlled by a relay Contacts distributed over the whole circuit. They have the reference symbol as a reference symbol of the relay, followed by a digit. The reference symbol pps denotes, for example, the Contact 5 of the relay pp. The various circuits are supplied by a common direct current source, E.g. a battery is fed, the positive pole of which is grounded. The one to the negative Pole-leading lines are marked with an arrow.

The line device EA contains an incentive circuit DT, a storage circuit EN and a comparison circle DC.

This line device is connected to a telephone device, not shown connected, which is located at the entrance of a semi-automatic control center, and through which the Intermediaries answer. A connection A / B, shown in the drawing by a shown in dashed lines is established by means not shown. when a call is received in the telephone facility. She stays in this for as long Position as how the call is not handled. You will then not go through any further shown means separated, H. s. Lecoanet et al 5.1 if the calling line is connected to a connection point.

The common facility EC includes: one serving as a timer Counter CV, which defines the current time level and corresponding time information outputs and, controlled by a relay kj, which in turn by pulse generator C 1 or C 2 is controlled, advances; a counter CP. which indicates the edit time level, and a subtraction circuit SOU.

which indicates the difference between the positions of the counters CV and CP. The counter CV. the counter CP and the subtraction direction SOU are binary circuits with 4 bits. They each control 4 output relays. If z. B. the counter CV in the Position 0001 is, the relay aa is actuated and the relays from to ad are in the rest position. When it is then in position 0010. the relay is energized from and the relay aa. ac and ad are in the rest position etc. The counter CV has 15 effective positions and provides 15 different time step information. Position 0000 will not used. It switches from one position to the next when via its input en the leading edge of an earth pulse is applied. At the same time the relay will mg excites at the beginning of this earth pulse and drops again when the counter reaches its Has changed position.

Such a counter is generally known and can refer to various Ways to be realized. The mode of operation of the counter CP is that of the counter QV identical. The subtraction device SOU receives the positions of the counters CV and CP through contacts aa2 - ad2 and ca2 - cd2. She shows with her relay sa - sd the difference between the positions of the counters CV and CP. If z. B. the Counter CV in position 0100 (relay ac activated and aa, ab and ad in rest position) and the counter CP in position 0001 (relay ca energized and cb to cd in the rest position ), the subtraction device displays the difference 0011. The relays sa and sb are energized and the relays sc and sd are in the rest position.

R. S. Lecoanet et al 5.1 Let us now first assume that there is no waiting call. In the line direction EA, all relays are in Rest position. The same applies to all other line facilities. In the common device EC are the counters CV and CP both in liner the same arbitrary Position e.g. 0100. The relays ac and cc are energized. Contact ac5 places earth to line c and thus gives the current time step to the line devices. The contact cc5 switches the earth from the line lc to the line Oc and gives with it the served time step.

Furthermore, in the subtracting circuit SOU, the two are the same Receives values, the relays sa to sd at rest. It follows that the relay l; is actuated.

Finally, the Reais kj is periodically actuated by the pulse generator C 1, but its contact kj2 has no effect because contact nr2 is open.

It is now assumed that a single call is in the line facility EA is received. When a call occurs in the telephone facility with which the Line device EA is connected, the circuit AB is closed. The relay Incentive circuit DT pp addresses via the following circuit: battery, relay pp, contact pr4, circuit AB, diode di line g, contact mg 1 earth in the common Facility EC. Contact pp3 closes and supplies a ground potential to the relay pp to keep. The contact pp5 closes and the relay pc responds via: battery, Contact pp5, upper winding of relay pc, diode dc, line c, contact ac5, contact mg2, earth. The relays pa to pd save the timer 0100 on the lines a to d is applied. The diodes da to dd are used to decouple the various line devices connected several times to lines a to d.

R.S. Lecoanet et al 5.1 As soon as the relay pc has responded, it closes the contact pc2. The relay pm of the comparison circuit DC speaks via the contacts pc2 and prl and indicates that a time stage is stored in the device EA is. The contact pcl closes and connects the line lc via the diode rc and the contact pc2 with the relay pm. The contact pm2 closes and thus holds the circuit for the relay pc upright. The contact pm3 closes and the relay speaks pr at. The contact pr4 switches over and thus holds the relay pr and leaves the other hand the relay pp drop out. The switched contact prl applies earth to the line r to the common facility EC to signal that a call is waiting in the then the relay no. responds. By switching the contact prl remains the relay pm only depends on the comparison circuit of the contacts ca5 to cd5 and pal to pdl. contains. When the first element of the stored time stage in EA (contact pal) identical to the corresponding element of the time stage operated of EC (contact ca5), the contacts pal and ca5 are in the positions shown, that is, in opposite positions and the relay pm receives over this line no earth. However, it receives an earth if the contacts are actuated differently are and this earth keeps the relay actuated. The same goes for the other three Elements of the compared time levels.

If there is any difference between the time levels to be compared exists, the relay receives pm earth and remains actuated. However, if all ads are identical, the relay pm drops out. The diodes ra to rd serve like the ones Diodes da to dd of the decoupling. For the case under consideration it was assumed that the Counters CV and CP are in the same position, i.e. the current one Time step corresponds to the time step served and that R.S. Lecoanet et al 5.1 Relay pm drops out as a result of the switchover of the contact prl. The over the EA received call facility is now intended for query. To this For this purpose, an earth potential is transmitted to the OP line via contacts pm5 and pr2.

Furthermore, the opening of contact pm2 interrupts the hold circuit for the relays pa to pd, which all return to the rest position.

The saved time step is then deleted. In the facility EA only the relay pr remains activated, which is held via the contacts pr3 and pr4 will. It drops out when the call has been answered and thus the connection A / B is interrupted will.

Finally, when the contact pml is closed again, it becomes an earth applied to line s. The relay ns of the common facility EC speaks on, but has no effect at this point in time.

It should now be assumed that the received from the device EA Call cannot be answered immediately (no operator free) and thereby the operation of the joint facility EC is described. It still will once reminded that in the device EC after a call the relay nr is actuated.

The operation of the counter CV will now be described.

When the relay kj, controlled by the pulse generator Cl, responds and contacts nr2 and lkl are closed, contact kj2 connects to earth Input of the counter CV. The relay mg responds. The contact mg2 opens and disconnects the earth from the line c in order to display the R. S. Lecoanet et al 5.1 switch off the current time step that changes.

The counter CV switches to position 0101. Now they are Relays aa and ac energized and the relays down and ad in the rest position. The contacts Close aa5 and ac5.

When contact kj2 opens again and disconnects earth from input en, the relay mg drops out. The contact mg2 closes and places earth on the now over lines a and c is transmitted. The current time step 0101 is like this displayed on lines a to d. Now when a call comes in, the line setup will be save the current time step 0101. As long as there is at least one call waiting (Relay no energized), the counter switches CV at regular intervals via the contacts kj2, nr2 and lkl continue in the rhythm of the pulse generator Cl.

Let us now assume that a second call occurs during the current timer shows the value 0110 on lines a to d. the calling line device EA2, which corresponds to the device shown here EA is set up, but has not been shown, saves this time stage.

Since the position of the counter CV differs from that of the counter CP, the subtraction device SOU displays the difference. One or more of the relays sa to sd respond according to the value of this difference. The relay lj falls away. The contact lj2 closes and prepares the energization of the relay np. Be it also pointed out that when the counter CV arrived in the position 0000 and the relay mg has dropped out, the relays aa to ad are in the rest position. Contacts aa4 to ad4 and mg3 are closed. The relay mk responds. Of the Contact mkl closes and applies earth to input en of counter CV.

This then switches to the following position 0001. The relay mg speaks to. The contact mg3 opens and initiates R. S. Lecoanet et al 5.1 the dropping out of the relay mk. The contact mkl opens and switches the earth from the input en of the counter CV and the relay mg drops out. When the counter CV therefore arrives in position OOOO, automatically switches to position 0001, whether there is a call or not. The position 0000. the excitement of none of the r Relay pa to pd in a line facility EA is thus made possible by the time gates used excluded.

Now when the first waiting call is queried, the circle A / B in the device EA interrupted by means not shown. The relay pr drops out, thereby disconnecting earth from line s. The management facility EA is thus in the rest position again. With the shutdown of the earth the short-circuit for the relay np, which is in series, is canceled from the line s with the relay ns that continues to respond.

The contact npl closes and applies earth to the input em of the meter CP on. The counter CP advances one step and reaches the position OlOl in which the relays ca and cc are energized. The relay lg speaks at the contact lg2 opens and interrupts the hold circuit of the relays ns and np, which then drop out. The contact npl opens and disconnects the earth from the input em of the counter CP. That Relay lg drops. The contact lgl closes, the relay li speaks via the contacts nsl, lgl and nrl an. The contact ns2 closes and prepares the holding of the relay ns and the excitation of the relay np before. The contact nsl opens and controls the dropping of the relay left When contact 1i2 is opened, the short circuit for the relay np canceled which now responds in series with the relay ns that is still operated. As already described above, the contact npl closes and controls the transfer of the counter CP to the following position 0110, in which the relays cb and cc are energized are.

R.S. Lecoanet et al 5.1 The contacts ca5 to cd5 place earth over the Lines la, Ob, Oc and 1d. The relay pm of the comparison circuit DC of the second Line device EA2 is with the lines Oa, 1b lc and Od through the contacts pl connected to dl. With this anticoincidence the relay pm drops out. The establishment EA2 is prepared in this way. to be connected to an operator console, such as it was already described when setting up EA. At this point the Device EA2 as a result of the dropout of the relay pm earth to the line s. These Earth keeps the relay ns in the common device EC actuated and interrupted thus the advancement of the counter CP.

The relay np drops out.

If the call to facility EA2 has also been answered and if none Another waiting call is received by the shared facility EC on the Line r no longer earth potential. The relay nr drops out. The contact nrl opens again in the rest position, if the counters CV and CP then in different positions are, the subtraction device SOU supplies information that differs from 0000. One or more of the relays sa to sd are energized. The relay l; is not aroused. The relay li responds via the contacts nsl, lgl, ljl nrl. The contact li2 closes and controls the excitation of the relay ns. As already described, the relay drops li ab the relay np responds, the relay lg drops out, the counter CP switches over one step further the relays ns and np drop out, the relay li speaks again on, etc. until the counter CP arrives in the same position as the counter CV. The subtraction circuit SOU now provides a display 0000. The relays sa to sd are now all in the rest position and the contacts sal to sdl are closed. The relay lj responds and interrupts the response circuit with its contact 1j1 for the relay ii. The counter CP remains in the position in which it is located. That way is the counter R.S. Lecoanet et al 5.1 CP in the brought to the same position as the counter CV to prevent that time when it arrives of the next call is lost. The diode ds prevents the influence of the earth via contact li2, to relay nr, thus preventing this relay from being energized when there is no call.

So far the case has been considered that in one age group only one there is only one waiting call. If there are multiple calls waiting, received the dormant line devices all have the same instantaneous time level.

If the counter CV on the lines la to Od has a served timer indicates which is identical to the stored time stage, the relay pm falls in every dormant facility belonging to this time level. These bodies put all earth on the line s and thus stop the counter CP. Any of these Facilities also apply earth to the op line. In a manner not shown they are queried one after the other in any order. Do everyone When the call has been completed, the relays pa to pd and then pr fall in the corresponding Line facility. When the operator takes the last call of a timer queries. the earth on the line s is switched off, so that the relay np in series responds with the relay ns to advance the counter CP.

The arrangement according to the invention can also be used by the operator Show the time level of the longest waiting call. To do this, receive the subtraction circuit on the left via the contacts aa2 to ad2 die Display of the time step displayed by the counter CV and on the right-hand side via the Contacts ca2 to cd2 show the position of the counter CP.

The subtraction circuit SOU forms the difference between these two displays and shows this in binary form through the R.S. Lecoanet et al 5.1 Excitation of the relays sa to sd on. With a difference of z. B. 0011 are the relays sa and sb energized, the other relays are in rest position. The contacts sa3 and sb3 close and supply a ground potential to a digital-to-analog converter CN. This continues to receive an earth signal that may be issued by contact lv2, which shows the switching speed of the counter CV. This converter delivers over its output as an analog signal.

the one on an analog measuring device AM (shown as a galvanometer) Displays the approximate waiting time of the oldest call.

Let us now consider the case that on the basis of the number of waiting calls and their processing time, the waiting time of the oldest call the Duration of one cycle of the counter CV assumes. In this case the counter CP has a such delay. that the counter CV would overtake it, but this is forbidden in order to keep the correct order when querying the calls.

If the position of the counter CV is one unit smaller than that of the Counter CP actual, their difference is 1111.

All relays sa to sd are now energized. Contacts sa2 to sd2 are closed and relay 1k responds.

The contact lkl opens and prevents the application of earth pulses to the input en of the counter CV in order to block the progression. The contact lk2 closes and controls the response of the relay LV, which is via the contacts LV6 and sd4 holds. The contact lvl switches and connects the relay kj with the pulse generator C2 instead of the pulse generator Cl.

e The pulse generator C2 has a lower clock rate than the pulse generator Cl. The relay kj is thus operated in a slower rhythm. If counter CP to move on to R.S. Lecoanet et al 5.1 switches, takes the difference between the positions of the counters CV and CP is different from 1111 Value. Strictly speaking, it takes the value 1110. The relay sa drops out. Of the Contact sa2 opens and relay 1k drops out. The contact lki completes again the control circuit for the counter CV. The counter CV switches again in rhythm Relay kj white, i.e. in the rhythm of the pulse generator C2.

The time levels are increased so that more waiting calls are saved can be. The counter CV continues to work in this rhythm until the difference between its position and that of the counter CH is less than 1000. If the If the difference is reduced to 0111, the relay sd drops out. The contact sd4 opens and the relay lv drops out.

The contact lvl goes into retirement again and the relay kj is reconnected to the pulse generator Cl and the counter CV can return to the previous one Assume working speed.

The arrangement according to the invention allows the waiting calls in Divide time levels and operate them, starting with the oldest level. she continues to allow. to extend the duration of the time steps in the event of overload in order to to be able to save more waiting calls. On the other hand, the capacity of the system can be enlarged with little means.

In order to double the capacity, for example, it is sufficient to add each arrangement of the System (counter CV, counter CP, memory EN etc.) to add a stage.

Claims (5)

Claims R.S. Lecoanet et al 5.1 l-. Arrangement for the timely query of waiting calls in telephone systems, characterized in that in a common Device (EC) a first clock-controlled counter (CV) is provided, which the current time level specifies that when there is an incoming call in one of the device EA assigned to the calling line is the current status of the first Counter (CV) is stored that a second counter (CP) is provided, the advances by one digit each time all calls start with the currently set Time stage are queried that in the line facilities (EA) in a connecting circuit (DC) the stored value is compared with the position of the second counter (CP) and that if the two values are equal, the call is forwarded. 2. Arrangement according to claim 1, characterized in that a locking means (nr2) is provided, which prevents the first counter (CV) from being switched on, when there is no waiting call. 3. Arrangement according to claim 1, characterized in that in the common Device (EC) a comparison circle (SOU) is provided, which the positions of the two counters (CV, CP) compares with each other that this comparison circle with the same Position of the counter a switching means (lj) actuated that the wet circuit of the second Counter (CP) prevents this comparison circuit from being used by another switching means (alk) actuated when the difference takes on the duration of one cycle of the second counter (Cp) threatens and that this other switching means (lk) the application of clock pulses to the first counter prevented. R.S. Lecoanet et al 5.1 4. Arrangement according to claim 3, characterized in that that when reducing the difference, the clock for the first counter (CV) to one lower clock sequence (C2) is switched. 5. Arrangement according to claim 5, characterized. that the tact it is only switched back to the higher clock sequence (C1) when the difference less than half a cycle duration;