DE19919512A1 - Telephone with function to recognize when handset is not replaced and provide acoustic alert - Google Patents

Abstract

When handset has not been replaced on telephone for predetermined time period, telephone is automatically brought into call state by fork contact being displaced by mechanical or electronic relay. When handset has not been replaced on telephone for predetermined time period, telephone is automatically brought into call state by fork contact being displaced by mechanical or electronic relay. Recognition unit (1) in telephone, receives information from position dependent switch in handset, from acceleration sensor, state of fork contact, output voltage of microphone and input voltage of receiver. Data is processed by algorithm and then optical or acoustic signal output with state influenced by fork contact state.

Description

The invention relates to a telephone with an additional function. This prevents Impairments for the telephone user due to inaccessibility, caused by incorrect operation. Furthermore, unwanted ones Assignments to the entry ports of switching centers prevented what for the Telecommunications network operator is advantageous.

There is currently a large number of new telephones in the terminal area diverse design. By for proper use design that is often not optimized can occur on many telephones, that due to even slight carelessness the listener is not working properly lies on. As a result, the fork contact is not closed, the phone can be in the known telephone technology can no longer be called.

Even with the widespread short-term placement of the handset next to the Telephone with the purpose of not being able to be called at the moment be forgotten to replace the handset. The inaccessibility will often not noticed here either.

It is therefore an object of the present invention to overcome the disadvantages of the above to eliminate mentioned prior art and a phone with a To develop additional function through which the disadvantages mentioned above eliminated.  

This object is in connection with the preamble of main claim 1 solved in that in the event of inadvertently not hanging up the receiver from a Detection device measures are triggered, which the Alert phone users to the malfunction of the phone.

The telephone advantageously turns on automatically after a predetermined time brought into a callable state. This is the accessibility in any case guaranteed again. The callable state can be established in this way, for example be that of a mechanical or electronic relay Fork contact is placed in the electrical state, which it with the on-hook Has listener. Now the phone can be called. Becomes the dropped handset added, can now by a position-dependent switch, as in described below, when the handset is off-hook existing switching state of the fork contact can be restored. It a conversation can now be answered and conducted.

The telephone according to the invention can be evaluated by evaluating various Recognize parameters from which there is a call or not. Is the Handset is not hung up and it is recognized that there is no call there is this connection in any, for example optical or acoustic form for the telephone user.

An easy way to identify a relatively safe Call connection is through the installation of a position sensitive switch given in the handset. This is set so that on the one hand in normal Conversation and on the other hand in the off-hook state of the listener different switching states occur. Furthermore, the installation of a Accelerometer possible, which an improved detection of Allows handset movement. In combination with loop current detection can be determined in a first approximation by an AND operation, whether or not a conversation is taking place.  

There is also the possibility of evaluating the bills Voltage components at the microphone output or at the listener's input Recognize the state of the conversation. However, it should be noted that no calls due to incoming advisory tones from the exchange connection is faked.

Therefore, the handset voltage is only in connection with other parameters of the listed options for determining an active call state between the telephone and the exchange.

Further details of the invention are shown in the drawing described schematically illustrated embodiments.

Here, FIG. 1 shows the arrangement of the detection device 1 in the phone 3 and the associated local exchange 5. When the receiver 2 is lifted, the recognition device 1 recognizes different input variables.

Fig. 2 shows the detection device 1. The information 6 from a position-dependent switch in the telephone receiver or 7 from an acceleration sensor, or from the state of the fork contact at 8, serves as input variables, for example. The AC voltage components of the handset and / or microphone at 9 can also be monitored. The received data are now processed according to predetermined algorithms. From the detection device, optical or acoustic signaling for the subscriber are then controlled via the output 10 and influenced by the output 11 of the fork contact.

Claims (6)

1. Telephone for connection to any telecommunications network, characterized in that a detection device triggers measures when the handset is not on-hook unintentionally, which make the telephone user aware of the malfunction of the telephone. 2. Telephone according to claim 1, characterized in that it is after a given time automatically if the handset is not on-hook unintentionally is brought into a callable state. 3. Telephone according to claim 1 or 2, characterized in that to recognize the state of conversation through the recognition device a position-dependent switch is built into the handset. 4. Telephone according to one or more of claims 1 to 3, characterized characterized in that to recognize the state of the conversation by the Detection device an acceleration sensor in the telephone handset is installed. 5. Telephone according to one or more of claims 1 to 4, characterized characterized in that to recognize the state of the conversation Output voltage of the microphone is used as an indicator. 6. Telephone according to one or more of claims 1 to 4, characterized characterized in that to recognize the state of the conversation Input voltage of the handset is used.