DE19636617C2 - Cordless telephone - Google Patents

Description

The invention relates to a cordless telephone set according to the preamble of claim 1.

So-called cordless phones are generally known. A cordless phone usually consists of the Handset with keyboard, possibly with display and a lower case with charging station. The handset is pointing generally a microphone for speaking and listening a hearing transducer or speaker. This cordless Telephone sets must be used and operated always with one hand out of the lower case with charging station be removed or from a storage place be included. After using the handset either put down again or to charge the battery again placed in the lower case with charging station. These devices have an acoustic interface for receiving and Send direction on. DE 43 20 047 A1 describes Extension of the cordless telephone for other applications at least one handset using an additional network inverse interface to a cordless telephone final unit (TAE) has been added. GB 2 274 960 A. describes a cell phone using a computer can be connected, the functions in two substantial parts are divided. Namely once Adaptation of the level of the interface connection lines through Circuits in the cradle of the cell phone and secondly, the control logic is in the Computer communication software included. This Interface device realizes the transition from one Four-wire to two-wire transmission, the  Interface for this with the electric fork of the phone connected is. Also includes the facility physical and functional adaptation units that are used for Example used for signal adaptation and amplification become. The radio telephone is processor-controlled and has an internal control bus that connects to the Interface of the radio telephone is connected. For implementation of analog voice signals in digital data to be transmitted there is an encoder / decoder in the radio telephone. "Cordless Phones" and "Mobile Phones" are also described in the following documents: EP 0 655 873 A2, US 5,479,479 A, DE 44 08 794 A1, DE 34 33 900 C2 and EP 0 696 149 A2.

They do offer a way of data transfers perform that will become increasingly important in the future; she however, are energy technology and adaptation technology as well operational needs improvement.

The invention is therefore based on the object to modify cordless telephone so that at Data transfers the necessary signal level adjustments depending on the connected devices as well as rules the components and automatic shutdown of current components that are not required can be controlled.

The achievement of the object according to the invention is characteristic characterized in claim 1.

Further solutions or refinements of the invention are in the characteristics of claims 2 to 6 characterized.  

This solution eliminates complicated operation, Signal level adjustments are done quickly and correctly automatically and the energy consumption is controlled lowered. The overall technical function is improved.

For the user, the interface is essentially one Socket into which the plug of a device used for Data transfer is suitable, can be plugged in. she is either as a two-wire interface or as Four-wire interface designed. For housing are Control lines on sockets so that the device that is suitable for data transfer, addressed, started and if necessary, the election can be included. she is via adaptation amplifiers, control lines, a Adaptation module and via transmit and receive lines with the coding and decoding circuit of the cordless telephone connected and via control lines to a control bus. The control bus is in turn connected to the control lines of the cordless phone and connected to a control line of a microprocessor that controls the individual via the control bus Switching elements for the respective function must work together controls. Through the connection of a cordless phone with an electric one Interface can now either be the data transfer take place or in a further modification of the Interface can use it to choose and transfer data  occur. This has the advantage that fax machines, Printers or computing / control devices related to this Interface are compatible, can be connected and that, for example, laptop models of computers through this not be restricted in their mobility, that is cordless phone is fully connected to it. Moreover can now use a cordless telephone to Transmissions and data acquisition and transmission be carried out directly by the sensor. A The measurement results can be temporarily stored omitted.

The invention is based on in the drawing illustrated embodiments explained in more detail and described. In the drawing:

Fig. 1 is a basic circuit diagram for a four-wire interface;

Fig. 2 is a block diagram for a two-wire interface and

Fig. 3 shows the basic circuit structure of the interface.

In the figures, in the description, in the summary and in the claims the same parts are the same Expressions and associated reference numerals denote the are listed in the list for reference numerals.

In Fig. 1 a schematic circuit diagram of a cordless telephone with an electrical interface 14 is shown for data transfer. This interface 14 is designed here as a four-wire interface and has a transmission and reception direction with the transmission and reception lines 16 and 17 required for this. These transmission and reception lines 16 and 17 are connected to an encoder / decoder 4 of the cordless telephone. The encoder / decoder 4 is also connected via a line 9 to the known HF part 5 , which in turn is connected to the antenna 6 . In addition, the encoder / decoder 4 is connected via lines 9 on the one hand to the loudspeaker 1 via an amplifier 3 and on the other hand to the microphone 2 via an amplifier 3 . The amplifiers 3 , the encoder / decoder 4 and the HF part 5 are each connected to the control bus 7 by a control line 8 and are controlled by the microprocessor 10 connected to it. An adaptation module 11 and adaptation amplifier 12 for the interface 14 are also connected to the control bus 7 via further control lines 15 . The interface 14 is connected to the control bus 7 with its own control line 15 . The interface itself is implemented externally by at least one socket into which the plug of a device that is suitable for data transfer can be inserted. The interface is designed as a four-wire interface and has a send and receive direction, which are routed to different sockets. The control lines 15 are also guided on sockets so that the device which is suitable for data transfer can be addressed, started and the selection can be recorded. The interface 14 is also equipped with overvoltage protection so that static charges in the cordless telephone cannot cause any damage.

The interface 14 according to FIG. 2 is realized externally by at least one socket into which the plug of a device that is suitable for data transfer can be inserted. It is designed as a two-wire interface and has two sockets to which the transmission and reception lines 16 and 17 are routed. In addition, the control lines 15 are guided on sockets so that the device which is suitable for data transfer can be addressed, started and, if necessary, the choice can be made. The matching amplifiers 12 are also used here for impedance and level matching. The adaptation module 11 , which is connected on the one hand to the adaptation amplifiers 12 and on the other hand to the encoder / decoder 4 , serves to adapt to the input of the encoder / decoder 4 . The electric fork 13 is required for the transition from the two-wire transmission to the four-wire transmission. The microprocessor 10 controls the individual units of the cordless telephone via the control bus 7 by means of a data record, which units have to work together for the execution of the respective function. The microprocessor's data set consists of an address of the respective unit and a command. The data of the data set can be sent in parallel or in series via the control bus 7 . As can be clearly seen from FIGS. 1 and 2, both basic circuit diagrams are constructed essentially the same, they differ only in the two-wire or four-wire version.

The interface of FIG. 3 is constructive to arrange such on the housing of the cordless telephone that, in use of the interface, the keyboard can be operated, the display is visible and that the cordless telephone are located on the cradle or in the charging station can, for example, while charging the batteries. The sockets are assigned the specified lines or signals. Free sockets can be assigned other signals or lines if necessary.

List of reference numbers

1

speaker

2

microphone

3

amplifier

4

Encoder / decoder

5

RF unit

6

antenna

7

control bus

8th

control lines

9

interconnectors

10

microprocessor

11

matching module

12

Programmable gain amplifier

13

electric fork

14

electrical interface

15

control lines

16

.

17

Transceiver lines

Claims (6)

1. Cordless telephone with loudspeaker and microphone, keyboard, encoder / decoder and HF part with antenna and a control bus, with which the components mentioned are connected for control by a microprocessor arranged in the cordless telephone, and in which an interface with the electric fork of the cordless telephone is connected in order to implement the transition from a two-wire to a four-wire transmission, characterized in that
that the interface ( 14 ) is connected to the control bus ( 7 ) via further control lines ( 15 ), the adaptation elements or amplifiers ( 12 ) and an adaptation module ( 11 ) with the encoder / via transmission and reception lines ( 16 , 17 ) Decoder ( 4 ) is connected, and
that the adaptation amplifiers or elements ( 12 ) and the adaptation module ( 11 ) are connected via further control lines ( 15 ) to the control bus ( 7 ) for control by the microprocessor ( 10 ). 2. Cordless phone according to claim 1, characterized in that the adaptation module ( 11 ) on the one hand with the adaptation amplifiers ( 12 ) and on the other hand with the encoder / decoder ( 4 ) connected via the transmit and receive lines ( 16 , 17 ) and for adaptation to the input of the encoder / decoder ( 4 ) is designed in terms of circuitry. 3. Cordless phone according to one of claims 1 or 2, characterized in that the microprocessor ( 10 ) via the control bus ( 7 ) and control lines ( 8 and 15 ) is connected to all components of the cordless phone and the interface ( 14 ). 4. Cordless telephone according to one of claims 1 to 3, characterized in that the interface ( 14 ) for data transfer is realized by sockets on the housing. 5. Cordless telephone according to one of claims 1 to 4, characterized in
that the interface is designed as a four-wire interface and has a transmission and reception direction, which are guided to different sockets on the housing and
that control lines for initializing or selecting the data transfer are routed to additional sockets on the housing. 6. Cordless telephone according to claim 1, characterized in that the circuit of the interface ( 14 ) is integrated in the device to be connected to the cordless telephone and via control lines ( 15 ) and transmit / receive lines ( 16 , 17 ) with the control bus ( 7 ) and the encoder / decoder ( 4 ) is pluggable.