DE2918796C2 - Control circuit for an answering machine - Google Patents

Description

If a call from a subscriber does not go off-hook after several ringing signals, the caller must assume the party is absent and give up trying to talk. To the Informing the caller that the subscriber is absent and informing him of the time of return, are used as an additional device for answering machines.

However, it often happens that the subscriber is present and also wants to take calls, himself but at a greater distance from the telephone set z. B. stays in the garden. If he then perceives the call signal and goes to his telephone set, it can very often happen that the caller returns has hung up. when the subscriber has reached his telephone set because the caller answered.

that the called party is not present. This is for both of you unpleasant because the caller has not reached the desired subscriber and the called party is in vain go to the telephone and for this z. B. has interrupted a job

From DE-AS 26 04476 a device consisting of a receiving and display device arranged at a calling subscriber and a transmitting device with several buttons arranged at the called subscriber is known with the help of which the called subscriber can send various types of information to the calling subscriber. For example, the message can be transmitted that the called subscriber is absent for a long time, that he does not want to be disturbed, that he is only briefly away from his workplace or that he is not at the telephone, but in the house and possibly successfully over This known device encodes the information entered with the dsn keys into the transmitter and transmits it as single-frequency or multi-frequency characters to the receiver, in which these characters are decoded.
However, such a device has the disadvantage that in the last two information cases described the calling subscriber does not know whether he will actually reach the called subscriber in a reasonable waiting time or not Special reception and display device is required. This reception device would also have to be equipped with speech protection so as not to mispronounce through noises or speech. Another disadvantage is that the keys are used to preset the information to be transmitted to the caller, but that the called subscriber does not make a necessary change to the information or resets the operated computer key or forgets, and that incorrect information is thus passed on to the called subscriber will.

This last-mentioned disadvantage also exists when - as would be conceivable - as a facility an answering machine is used.

Furthermore, DE-AS 15 66 826 is a personal

search device in a telephone exchange known, in which this system in addition to the normal call a special ring tone sequence by means of a connected to the line selector output of the called subscriber Sends out the signal converter. This ringing tone sequence reaches a transmitter of the people search device and wirelessly becomes the portable device of the called party, consisting of at least one receiver Transferred to the participant. This subscriber can then visit his telephone set or via one other telephone set give information in the vicinity of his telephone set so that the calling Participants can be notified. The people search facility but can also be equipped with a feedback transmitter and voice connection in both directions.

If a paging device with feedback transmitters and voice connections in both directions would be used in the first described device, the high effort would be disadvantageous because there are

t> 5 modulators for modulating the carrier frequency with the voice band required. Often an answering machine is also used for special reasons be desirable. Furthermore, if only a single carrier

sequence is available, the search time can be long, so that the calling party will possibly hang up his handset again. On the other hand, if several carrier frequencies are available, the carrier frequencies must be spaced a long way because of the speech modulation. In this case, consuming generators for the carrier frequencies are tr. Conducive.

If a people search device without feedback transmitters in the first-described known device would be used, the waiting time for the caller can be so long that this gives up the connection attempt The called subscriber therefore becomes his telephone set in vain have returned.

The object of the invention is to provide a control circuit of the type mentioned in the preamble of claim 1 for an answering machine, which is simply structured and with the help of which the called subscriber is not in the vicinity of his telephone set is located, the calling party can quickly notify whether he can be reached immediately or not

This object is achieved with the measures mentioned in claim 1. The triggering of the notification of the calling subscriber can thus be made dependent on a switching action taken by the called subscriber after the call, without having to use a people search device. Failure to reset the switch does not result in incorrect information for the calling subscriber. Answering machines that are already connected to subscriber lines can be retrofitted with the control circuit according to the invention. ι

Further developments of the invention can be found in the subclaims.

The invention will now be explained in more detail with reference to the embodiment shown in the drawing

In this embodiment, only the details necessary to understand the invention are shown An answering machine is therefore assumed, which can optionally be one of two different ones Can submit message texts.

The answering machine is connected to the corresponding wires to the associated telephone set via wire a and b. It is now assumed that the switches T1 and T2 are in the shown position. If now a call comes for the subscriber, the ringing current receiving relay R responds to the ringing current. To simplify the illustration, the connection of this relay R is only shown schematically. The relay R is drop-out delayed. The delay time is chosen so that the pause between two callsigns is bridged.

The relay R only drops out again when no more callsigns are received. With the contact r 1, the start relay S is switched on, which closes the loop via the transformer Ue to the office with its contact si. With the contact 5 2 the motor M for the drive of the tape is switched on and contact s3 closes the self-holding circuit for the relay 5.

The text recorded on the corresponding track is now transmitted to the caller via the tape head TK 1. It may be an indication i .. example, that the called party until pm evening would be called. When the text has been transmitted, an end of tape signal is generated in a manner not shown. With contacts öel and be2 actuated as a function of this signal, the motor M is switched off and the hold circuit for the relay S is interrupted. When contact s 1 is opened, the loop to the office is interrupted and the device is in the idle position again.

However, if the subscriber is present but further away from the telephone set, he switches switches T1 and T2 together beforehand.
If a call comes in now that speaks again

ίο relay R on. Depending on the spatial conditions, a call signal can now be transmitted to the subscriber using contact r3 via output A. At the Aasgang A z. B. an outdoor alarm clock W can be switched on or a wireless transmitter that transmits a corresponding signal to a receiver carried by the participant

If the subscriber wants to accept the call, he presses an acknowledgment key QTi, via which the relay Fi is made to respond Y. ' Case of a

Participants miiguled receiver is appropriately assigned a transmitter and the wirelessly transmitted signal is then picked up by a receiver in the vicinity of the answering machine, which then turns on the relay Fi. Such receivers and transmitters are z. B. known from people search systems, but it is also possible to provide acknowledgment buttons that are wired to input E 1 at several points in the area in which the subscriber is staying when he wants to receive calls.

When the contact / 11 is closed, the start relay S now responds via the actuated switch Tl and contact r 1. Since switch T2 is also activated, the sound head TK 2 now issues a different message text. With this message text the caller

z. B. communicated that the called party is already is on the way to the telephone and may wait a moment. Simultaneously the time circuit Z described below is reset with contact / 12

When this message text is issued, the end of the conveyor contacts at and be 2. The opening of the contact be 2 , however, has no effect on the self-holding circuit for the relay S, since the switch T1 is toggled and the relay S via the contacts u 3 ;

"Gu and s 3 remains held When the subscriber then the telephone set, opens the controlled from the switch hook of the telephone set contact gu and allowed to drop relay S. The loop to the calling subscriber is now put on hold over the telephone. Should not be interested in the participants who answer the call, it may have a Quittangsl-ste QT2 operate via the relay Fl is brought to respond. Relay U responds via the actuated contact / 2 and is maintained via the contacts

u 4 and 5 4th contact u 1 causes the start relay to respond,

Contact υ 2 switches to the tape head TKi and Contact u 3 switches the latch circuit for the relay Sin dependence on the end of tape contact be 2. If the participant has forgotten to

If you do not have to switch the switch to the position shown, the correct message text can still be issued. With the contact r2 of the Rufempfängercrrelais a time circuit Z is switched on, which after a specified time, z. B. 20 see the relay U to connect

Talking t> 5 brings about the ones already described above Processes triggers.

If the answering machine only sends a message can, it is necessary that each time you switch

direction of switch 71 the announcement text is changed. A reversal with the relay t / is then also not possible possible.

It goes without saying that in realizing the Control of the answering machine instead of the relay shown here also electronic switching means or Arrangements using microprocessors can be used.

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Claims (8)

Patent claims: 1. Control circuit for an answering machine, in which a sounding circuit is provided, the is closed when there is a call, whereby the loop closes and causes the output of a message text by means of a playback device after which the connection is released, characterized in that that a switch (Tl) that can be actuated by the subscriber is provided, and when it is actuated, the switch-on circuit over it and an additional .Schmittmittel (ΠΙ) runs, which is only dependent of a switching action of the called subscriber closes the switch-on circuit, and that the The connection is released after the message text has been submitted until the called subscriber has reported is prevented. 2. Control circuit according to claim!, Characterized in that that the additional switching means (/ 11) is operated directly or indirectly via cables. 3. Control circuit according to claim 1, characterized in that the additional switching means (711) operated wirelessly. 4. Control circuit according to claim 1, characterized in that different message texts are provided for the two different operating modes and for this purpose the playback device between two memory: means (TK 1,2) can be switched (T2). 5. Control circuit according to Apspruch 1, characterized in that a further switching means (U) is provided, which the Wirku ^ j? of the switch (T 1,2) cancels 6. Control circuit according to claim 5, characterized in that the switching means (U) is excited by a timing circuit (Z) which responds when the additional switching means (/ H) is not actuated after a predetermined time after the occurrence of a call. 7th Control circuit according to Claim 5, characterized in that the switching means (U) can be actuated by a further switching means (/ 2) which can be controlled via lines or wirelessly. 8. Control circuit according to claim 1, characterized in that the called party is informed of the presence of a call by wire or wirelessly (r 3, W)