Data processing/transfer device and data end device for a line-switched network and packet-switched network

The present invention relates to a data processing / data transmission device according to the preamble of claim 1 and a communication device for a circuit switched network and packet-switched network, both according to the preamble of claim 15 and according to the preamble of claim 16th

In publications on the subject "home networking" or "Connected Home" or "Telephony and Control" is spoken by a networking of devices in the private area, such as televisions, personal computers and other devices for everyday use. The phone, landline phone or cordless phone, it is preferably used as network access to the circuit-switched network (voice network). Access to the packet-switched network (data network) - eg Internet - is irrelevant and can be done in different ways.

The connection between packet- and circuit-switched network, according to <figref idrefs="f0001">FIGURE 1</figref> only insofar known measures available, as the device, such as a personal computer for packet data transmission via Ethernet, Digital Subscriber Line (DSL) - is connected or cable connection to the packet-switched network such as the Internet, and for example, a cordless base station, which is connected to the voice data transmission via an ISDN / PSTN network termination to the circuit-switched network, initiate, establish a connection (control) or the device to configure using a cordless handset (configuration). Only parts of the cordless base station or the phone functionality to be transferred to the personal computer. The control and configuration can of course also in the reverse direction.

Crucially, however, that no voice data in packet-switched network and the data network are processed, but always a logical connection between the voice terminal, the cordless handset, and the central office, the cordless base station exists. So there is no logical connection between the circuit-switched voice network and the packet switched data network (eg Internet) with respect to voice data. The use of voice services of the dedicated packet network (such as Internet telephony, voice messages) is not currently used on the user logged on to the cordless base station cordless handset.

From the <patcit id="pcit0001" dnum="DE19645368A1"><text>DE 196 45 368 A1</text></patcit> is a data sink / source (first embodiment) are known, the pressure-written in accordance with the <figref idrefs="f0003">figure 3</figref> with the associated description of a data terminal (1, 2) and a part connected to the data terminal Router (7), which is both a circuit-switched network (POTS, ISDN) and a packet-switched network (INTERNET) connected, is or formed becomes. In a second embodiment in printed publications 7 Moreover heard an exchange (VS) to the known data sink / source.

The router (7) in the pressure-written <figref idrefs="f0003">figure 3</figref> receives via a data input (74) incoming data, among others, the data terminal (1, 2) and includes the following, in particular<ul><li>* A configured as IP switch for copying IP packets, the IP router (72) with a data compression means (721), an encryption device (722) and a line connection (76) to other routers or hosts on the Internet,</li><li>* A function of a switch or a telecommunications system-containing line-switching device (73) with a digital switching network (731) and a line connection (75) to the telephone network and</li><li>* A data input (74) connected downstream, designed as a logical switch control means (71) to an intermediate register (712) and a packet assembly / Depaketierungseinrichtung (711), wherein the control means (71) both to the IP router (72) as well as is connected to the line-switching device (73) and the incoming / incoming data is sent either via the IP router into the packet-switched network or via the line-switching device to the circuit-switched, so there will be a data routing, in accordance with the data a set type of switching (packet or circuit-based switching) are routed.</li></ul>

According to the printed publications 7 is the control device (71) comprising part of the functionality of the router (7) in the data terminal (1, 2) integrated and thus finds the data routing in the data terminal instead.

The the object underlying the invention is to provide a data processing / data transmission device and a communication device for a circuit switched network and packet-switched network, the or logical separation between applications that are based on the circuit-switched network, such as PSTN, ISDN, and Applications which on the packet switched network such as the Internet, are based, cancels.

This object is achieved starting from the data processing / data transmission device as defined in the preamble of claim 1 by the features specified in the characterizing part of patent claim 1.

The object is both achieved on the basis of the defined in the preamble of claim 15 DTE by those specified in the characterizing part of claim 15 features as well, starting from the data terminal equipment as defined in the preamble of claim 16 by the features stated in the characterizing part of claim 16 Characteristics ,

The basis of the invention idea is as a data processing / data transmission device designated, multipurpose device for the automatic processing of data and for transmitting and receiving data in both the packet switched or from the packet-switched network as well as in the circuit switched or from the circuit switched network, that is both the packet switched network assignable as well as with the circuit-switched network connectable and at least one data terminal for transmitting and receiving data in the circuit switched or out of the circuit switched network associated with the or assignable to provided with controllable switching means in such a way are controlled such that the data terminal which is connected in a first operating mode via the data processing / data transfer device to the circuit-switched network, from the first operating mode to a second mode of operation in which the data terminal is connected to the data processing / data transfer device with the packet switched network , can be switched, and vice versa, so there will be a change of operating mode.

According to the claims 2 and 17, it is advantageous that the switch to prioritize the connection to the circuit-switched network over the packet switched network can be undertaken.

Furthermore, according to the claims 4 and 19 advantageously that instead a new transmission for packet- and circuit-switched network is connected to the switching of the data terminal untapped transmission for circuit- and packet-switched network resolvable and be set up to selectively services packet- to take or circuit-switched network to complete.

The invention consists in the expansion of an example according to claim 8 as a set-top box, notebook or personal computer constructed data processing / data transmission device, consisting of the structural unit of a data transmission device, which is for example designed as a cordless base station, and an example to the Internet crosslinked a data processing apparatus, which is preferably designed as a personal computer, laptop or server for the home and / or work space area to a switchover that is realized according to the claims 10 and 11 preferably by software, so that by in the data-processing / data transmission device processed voice and / or signaling data streams new applications are possible. With the thus created structural unit of data transmission device and data processing device can Internet or personal computer-based voice applications (such as Internet telephony, "voice messaging" etc.) to the data processing / data transmission device powered communication devices are used.

This means that data terminal equipment, such as a cordless handset according to claim 30 or a telephone, a logical connection for voice data in the packet switched network, for example can turn to the Internet or a local area network of "Home Networking" scenario.

This especially usability is increased. The applications that are currently on a personal computer powered headset (headset) are possible, can also be carried out on a cordless handset due to the invention.

The inventive switchover in the data processing / data transmission device with an integrated cordless base station optional two operating modes on the cordless handset can be set by the user.

In a first mode of the cordless handset works like a normal phone at the circuit-switched network.

In a second operating mode, the voice and data protocol on the data processing / data transmission device are routed to the data network. It consists not connect to the wired network. In addition, information on user input on the cordless handset are forwarded to the personal computer of the data processing / data transmission device and transmitted display information to the cordless handset from the personal computer of the data processing / data transmission device. In addition, the voice channels are transparent, connected via a so-called tunnel connection to the personal computer of the data processing / data transmission device.

In this way, in the data processing / data transmission device, the cordless handset connected to the cordless base station an application running on the personal computer application, such as use as a headset (headphones). Additional applications can be activated by interaction with the user via the display and control data, whereby in particular the usability is further increased. Thus, for example, "Voice over Internet Protocol" telephony (VoIP telephony) with a conventional cordless telephone (telephony functionality to provide all applications in a network (eg, personal computers in the home network) available). It is also possible that performed in this manner with the conventional cordless telephone, for example, online games, voice controls implemented in the home network and devices can be remotely controlled in the home network.

With the invention it is for example possible to integrate conventional cordless phones in a "connected home" scenario. Here, the staff is computer for the "VoIP-telephony" as "VoIP gateway". Also, integration into the gaming consoles such as the X-Box, possible.

Furthermore, the invention offers the possibility of applications of data processing / data transmission device by the data terminal based on voice control and speech recognition mechanisms (Voice Control and Voice Recognition) to control, to use the data terminal as a remote control unit (Remote Control Unit), access to the Messenger service produce by Microsoft through the data terminal to realize an Internet radio to perform Internet chatting using the cordless handset or telephone, the conversion of text messages into voice messages ( "text to speech") so that can be read as e-mails and / or the to use display of messages on the display of the data terminal.

The invention is not only as explained above for the home apply if in the data processing / data transmission device, the data transmission device as a cordless base station and the data processing apparatus are formed as a personal computer or server, and the data terminal is designed as a cordless handset, but is also readily for the public sector when in the data processing / data transmission device, the data transfer means are constructed as cellular mobile infrastructure consisting of a base station and a central switching system and the data processing apparatus as a server, and the data terminal as a mobile phone (cell phone) is applicable.

Further advantageous developments of the invention are disclosed in the remaining dependent claims and the following description of an embodiment of the invention.

The embodiment of the invention is based on the <figref idrefs="f0002 f0003 f0004">Figures 2 to 4</figref> described. Show it:<ul><li><figref idrefs="f0002">FIGURE 2</figref> a first data sink / source for a circuit switched network and packet switched network consisting of a data terminal, a data transmission device and a as a data processing unit designated universal device for the automatic processing of data and for transmitting and receiving data in the packet-switched or from the packet-switched network, </li><li><figref idrefs="f0003">FIGURE 3</figref> starting from <figref idrefs="f0002">FIGURE 2</figref> a second data sink / source for a circuit switched network and packet switched network comprising a data terminal device and a as a data processing / data transfer device designated universal device DVÜG for automatic processing of data and for transmitting and receiving data in both the packet switched or from the packet-switched network as well as in the circuit switched or from the circuit-switched network,</li><li><figref idrefs="f0004">FIGURE 4</figref> Implementation of the first data sink / source with a cordless phone and a personal computer.</li><li><figref idrefs="f0002">FIGURE 2</figref> shows a first data sink / source DSQ1 a preferably as "Public Switched Telephone Network (PSTN)" or "Integrated Services Digital Network (ISDN)" designed circuit-switched network LVN and preferably configured as Internet packet-switched network PVN consisting of a data terminal device DEE, a data transmission device DÜE, and a data processing apparatus as designated DVG universal device for the automatic processing of data and for transmitting and receiving data in the packet switched or from the packet-switched network.</li></ul>

The data terminal device DEE contains a first central control unit ZSE1, control facility STM and a first terminal device / transmission device interface EÜSS1. The first central control unit ZSE1, serves to control the functional flows in the data terminal device DEE, and is connected both to the control facility STM and to the first terminal device / transmission device interface EÜSS1. About the first terminal device / transmission device interface EÜSS1 the data terminal device DEE is connected to the data transmission device DUE, having a second terminal device / transmission device interface EÜSS2 for this connection. The connection between the data terminal device DEE and the data transmission device DUE a first line link LV1 or a first air link FRV1 is provided either.

The data transmission device DUE contains the second terminal device / transmission device interface EÜSS2 a second central control unit ZSE2, a first network / transmission device interface NÜSS1, first switching USM1 and a first device / transmission device interface GÜSS1. The second central control unit ZSE2 which serves to control the functional flows in the data transmission device DUE and having first switchover control facility USSM1 is connected to the second terminal device / transmission device interface EÜSS2, the first network / transmission device interface NÜSS1 and the first device / transmission device interface GÜSS1. The first switchover control facility USSM1 the second central control unit ZSE2 form with the first switching USM1 a functional unit such that the switchover control facility USSM1 control the switching USM1 what in the<figref idrefs="f0002">FIGURE 2</figref> is represented by the connection between the two agents. The data transmission device DUE is the one on the first network / transmission device interface NÜSS1 with the circuit-switched network LVN and the other via the first device / transmission device interface GÜSS1 connected to the data processing device DVG, having a second device / transmission device interface GÜSS2 for this connection. The connection between the data transmission device DUE and the data processing device DVG, either a second line link LV2 or a second air link FRV2 is provided again.

The data processing device DVG contains the second device / transmission device interface GÜSS2 a third central control unit ZSE3 and a first network / device interface NGSS1. The third central control unit ZSE3 which serves to control the functional flows in the data processing device DVG and optional addition to the first switchover control facility USSM1 the second central control unit ZSE2 in the data transmission device DUE in<figref idrefs="f0002">FIGURE 2</figref> has dashed line second switchover control facility USSM2, is connected to the second device / transmission device interface GÜSS2 and the first network / device interface NGSS1. About the first network / device interface NGSS1 the data processing device DVG is connected to the packet-switched network PVN.

In the following, based on the explanation of the construction of the first data sink / source DSQ1 the operation of the data sink / source DSQ1 with regard to the elimination of the logical separation between the first applications based on the circuit-switched network LVN, and second applications running on the packet-switched network PVN based explains.

From the perspective of the data terminal DEE, which has been, for example, far more than the first line link LV1 or the first air link FRV1 and the data transmission device DUE connected to the circuit-switched network LVN (cf.. Cordless base station as a data transmission device and cordless handset as a data terminal in <figref idrefs="f0001">FIGURE 1</figref>), It means that the user of the data terminal device DEE can take as an addressee and sender in either claim one hand services of the circuit-switched network LVN and the other hand the service of packet-switched network PVN, respectively. In other words, the transmission of the data terminal DEE to the circuit-switched network LVN and the packet-switched network PVN the user must each optionally available, so they can be changed by the user if required (change of operating mode of the data terminal equipment). Thus, the data terminal device DEE is connected to the packet-switched network PVN example, in a first operating mode of the data transmission device DUE to the circuit-switched network LVN and in a second operating mode of the data transmission device DUE and the data processing device DVG.

Because of the mentioned known scenario (data terminal ↔ circuit switched network) already existing connection between the data terminal device DEE and the data transmission device DUE are for this purpose in the data transmission device DUE the first switching USM1 and the first switchover control facility USSM1, in the data processing device DVG optionally the second switchover facility USSM2 and in the data terminal device DEE the control facility STM available. Said means are apart from the control facility STM in the data terminal DEE, which are preferably designed as a keyboard, all preferably as program modules (software) designed. but in place of the keyboard, it is also possible to use a voice control.

For every other conceivable scenario, however, the distribution of these means may be as different again. For example, in a scenario (data terminal ↔ packet switched network), when the data terminal is connected, for example via a cable connection or an air link and the data processing device to the packet-switched network. In this case, the switching means and switchover preferably in the data processing device, while in the data transmitting device further switchover are optionally present.

Alternatively, a configuration is conceivable in which the data transmission device to the packet switched network and the data processing apparatus is connected to the circuit-switched network.

For the <figref idrefs="f0002">FIGURE 2</figref> underlying scenario (data terminal ↔ circuit switched network), in which the first switching USM1 are present in the data transmission device DUE, arise depending on whether <ol><li>(I) only the first switchover control facility USSM1 are present in the data transmission device DUE,</li><li>(Ii) both the first switchover control facility USSM1 in the data transmission device DUE and the second switchover facility USSM2 are present in the data processing device DVG, both switchover control facility USSM1, facility USSM2 the first switching USM1 control in the data transmission device DUE,</li><li>(Iii) both the first switchover control facility USSM1 in the data transmission device DUE and the second switchover facility USSM2 are present in the data processing device DVG, but in contrast to (ii), only the first switchover control facility USSM1 control the first switching USM1 in the data transmission device DUE,</li></ol>three variants can be realized in the scenario of the mentioned operating mode change in the first data sink / source DSQ1 as based.

Implementation variant (i):

For a description of this implementation variant is now assumed that the data terminal device DEE is, for example, in the first operation mode, according to the data terminal device DEE is connected via the data transmission device DUE to the circuit-switched network LVN. Of course, the other case is possible in which the data terminal device DEE is in the second operating mode.

The user of the data terminal device DEE now wishes to swap into the second operating mode. The addressed mode change is initiated by the user of the data terminal device DEE that this activating the control facility STM. Then, controlled by the first central control unit ZSE1 this and the first terminal device / transmission device interface EÜSS1 a first signal S1 for signaling the operating mode change from the data terminal device DEE on the first line link LV1 or the first air link FRV1 to the second terminal device / transmission device interface EÜSS2 transmitted in the data transmission device DUE, which forwards the signal transmitted from the data terminal device DEE first signal S1 to the first switchover control facility USSM1.

The first switchover control facility USSM1 then generate a second signal S2, which they transmitted to the data processing device DVG and there in particular to the third central control unit ZSE3 and with the data processing device DVG is informed that the data terminal DEE on the data processing device DVG connect to the packet-switched network wants to build PVN. After the data processing device DVG has been informed that generate first switchover control facility USSM1 a third signal S3, and transmits this to the first switching USM1. With the transfer of the third signal S3, the first switching USM1 be instructed to dissolve the previously used by the data terminal DEE transmission for circuit-switched network LVN and instead set up a new transmission on the data processing device DVG to the packet-switched network PVN. In the<figref idrefs="f0002">FIGURE 2</figref> is indicated in the first switching USM1 by the switch symbol of this process. The data terminal device DEE is thereby connected via the second line link LV2 or the second air link FRV2 and the data processing device DVG to the packet-switched network PVN. This second mode of operation associated transmission now remains as long connected or set up until in the same way an another operating mode change, this time a change from the second mode to the first mode of operation is initiated by the user.

In order to inform the user of the data terminal as to the mode of operation, the data terminal is, the respective activated operating mode is preferably displayed on a display of the communication device (see. <figref idrefs="f0004">FIGURE 4</figref>). Furthermore, it is possible for data terminals, the priority for voice transmission (telephony) are used (see.<figref idrefs="f0004">FIGURE 4</figref>) And with which a "Voice over IP" connection is not possible to prioritize the connection to the circuit-switched network over the packet switched network. This can be achieved by a time-controlled default setting. This means that if a change of operating mode from the first mode to the second operating mode as described has been made and the data terminal to terminate a session in the second operating mode within a predetermined time is not reset again, done resetting to the initial state (default state) automatically ,

Implementation variant (ii):

For a description of this implementation variant is now assumed again that the data terminal device DEE is, for example, in the first operation mode, according to the data terminal device DEE is connected via the data transmission device DUE to the circuit-switched network LVN. Of course, the other case is also possible again, in which the data terminal DEE is in the second operating mode.

The user of the data terminal device DEE now wishes to swap into the second operating mode or the first mode of operation. The respective operating mode change is initiated by the user of the data terminal device DEE that this activating the control facility STM. For each change this can be always one and the same button or soft key, or it can be used for both operation mode switching, different buttons for example. When voice control, however, the matter is unambiguous, because the spoken operating mode change is implemented.

Then, controlled by the first central control unit ZSE1 this and the first terminal device / transmission device interface EÜSS1 a fourth signal S4 for signaling the operating mode change from the data terminal device DEE on the first line link LV1 or the first air link FRV1 to the second terminal device / transmission device interface EÜSS2 transmitted in the data transmission device DÜE, on the signal transmitted from the data terminal DEE fourth signal S4 in the case of change to the second mode of operation (the current mode of operation is thus the first operation mode) is forwarded to the first switchover control facility USSM1 and in the case of switching to the first operating mode ( the current mode is therefore the second operating mode) via the first device / transmission device interface GÜSS1, the second line link LV2 or the second air link FRV2 and the second device / transmission device interface GÜSS2 in that order, to the second switchover facility USSM2 forwarded in the data processing device DVG becomes.

The fourth signal S4 receiving first and second switchover control facility USSM1, facility USSM2 then generate each a fifth signal S5, with each other switchover facility USSM2 be informed facility USSM1 about the respective operating mode change. The fifth signal S5 is transmitted via the first device / transmission device interface GÜSS1, the second line link LV2 or the second air link FRV2 and the second device / transmission device interface GÜSS2 or in the reverse direction to the relevant switchover control facility USSM2, facility USSM1. After the relevant switchover control facility USSM2, facility USSM1 and therefore the data processing device DVG or data transmission device DUE have been informed of the change of operating mode, generating the fourth signal S4 receiving first and second switchover control facility USSM1, facility USSM2 each a sixth signal S6, and transmits this first to the switching USM1. In the case of the change to the second operating mode, the first switchover control facility USSM1 generate said sixth signal S6, while in the case of changing generate the first operation mode, the second switchover control facility USSM2 the sixth signal S6. With the transfer of the sixth signal S6, the first switching USM1 be instructed to dissolve the previously used by the data terminal DEE transmission to the circuit-switched network LVN and the packet-switched network PVN and instead a new transmission on the data processing device DVG to the packet-switched network PVN or via the data transmission device DCE set up for circuit-switched network LVN. In the<figref idrefs="f0002">FIGURE 2</figref> is indicated in the first switching USM1 again by the switch symbol of this process. The data terminal device DEE is thereby connected via the second line link LV2 or the second air link FRV2 and the data processing device DVG to the packet-switched network PVN or via the data transmission device DUE to the circuit-switched network LVN. This second operating mode or the first mode of operation associated transmission now remains as long connected or set up until in the same way an another operating mode change, this time a change from the second operating mode to the first operating mode or the first mode to the second mode of operation is initiated by the user.

To inform the user, in which operating mode the data terminal device is, the respective activated operating mode is again preferably on a display of the data terminal device DEE displayed (see. <figref idrefs="f0004">FIGURE 4</figref>). Furthermore, it is again possible for data terminals, the priority for voice transmission (telephony) are used (see.<figref idrefs="f0004">FIGURE 4</figref>) And with which a "Voice over IP" connection is not possible to prioritize the connection to the circuit-switched network over the packet switched network. This can be achieved by a time-controlled default setting. This means that, if an operating mode change from the first operating mode to the second operation mode or from the second operating mode to the first mode of operation such as described has been made and the data terminal device according to terminate a session in the second operating mode or the first mode of operation is not reset again within a predetermined time , a resetting automatically to their original state (default state).

Implementation variant (iii):

For a description of this implementation variant is now assumed again that the data terminal device DEE is, for example, in the first operation mode, according to the data terminal device DEE is connected via the data transmission device DUE to the circuit-switched network LVN. Of course, the other case is also possible again, in which the data terminal DEE is in the second operating mode.

The user of the data terminal device DEE now wishes to swap into the second operating mode or the first mode of operation. The respective operating mode change is initiated by the user of the data terminal device DEE that this activating the control facility STM. For each change this can be always one and the same button or soft key, or it can be used for both operation mode switching, different buttons for example. When voice control, however, the matter is unambiguous, because the spoken operating mode change is implemented.

When returning controlled by the first central control unit ZSE1 this and the first terminal device / transmission device interface EÜSS1 again the fourth signal S4 for signaling the operating mode change from the data terminal device DEE on the first line link LV1 or the first air link FRV1 to the second terminal device / transmitted transmission device interface EÜSS2 in the data transmission device DUE, on the signal transmitted from the data terminal device DEE fourth signal S4 (thus is the current mode of the first mode) in case of a change to the second mode of operation is passed back to the first switchover control facility USSM1 and in case of a change to first mode (the current mode is therefore the second operating mode) again via the first device / transmission device interface GÜSS1, the second line link LV2 or the second air link FRV2 and the second device / transmission device interface GÜSS2 in this order again to the second switchover facility USSM2 is forwarded in the data processing device DVG.

The fourth signal S4 receiving first switchover control facility USSM1 then generate a seventh signal S7, with this second Shift inform altsteuerungsmittel facility USSM2 about them signaled mode change. The seventh signal S7 is transmitted to the second switchover facility USSM2 via the first device / transmission device interface GÜSS1, the second line link LV2 or the second air link FRV2 and the second device / transmission device interface GÜSS2. After the second switchover facility USSM2 and therefore the data processing device DVG have been informed of the change of operating mode, generating the seventh signal S7 receiving second switchover facility USSM2 an eighth signal S8 and transmits this via the second device / transmission device interface GÜSS2, the second line link LV2 or the second air link FRV2 and the first device / transmission device interface GÜSS1 in that order, to the first switchover control facility USSM1. With this eighth signal S8, the second switchover facility USSM2 signal the first switchover control facility USSM1 that this change from the second operating mode to the first mode of the first switching USM1 signal and thus to control. The first switchover control facility USSM1 then generates a ninth signal S9 and transmit this to the first switching USM1. With the transfer of the ninth signal S9 the first switching USM1 be instructed to dissolve the previously used by the data terminal DEE transmission to the circuit-switched network LVN and the packet-switched network PVN and instead a new transmission on the data processing device DVG to the packet-switched network PVN or via the data transmission device DCE set up for circuit-switched network LVN. In the<figref idrefs="f0002">FIGURE 2</figref> is indicated in the first switching USM1 again by the switch symbol of this process. The data terminal device DEE is thereby connected via the second line link LV2 or the second air link FRV2 and the data processing device DVG to the packet-switched network PVN or via the data transmission device DUE to the circuit-switched network LVN. This second operating mode or the first mode of operation associated transmission now remains as long connected or set up until in the same way an another operating mode change, this time a change from the second operating mode to the first operating mode or the first mode to the second mode of operation is initiated by the user.

To inform the user, in which operating mode the data terminal device is, the respective activated operating mode is again preferably on a display of the data terminal device DEE displayed (see. <figref idrefs="f0004">FIGURE 4</figref>). Furthermore, it is again possible for data terminals, the priority for voice transmission (telephony) are used (see.<figref idrefs="f0004">FIGURE 4</figref>) And with which a "Voice over IP" connection is not possible to prioritize the connection to the circuit-switched network over the packet switched network. This can be achieved by a time-controlled default setting. This means that, if an operating mode change from the first operating mode to the second operation mode or from the second operating mode to the first mode of operation such as described has been made and the data terminal device according to terminate a session in the second operating mode or the first mode of operation is not reset again within a predetermined time , a resetting automatically to their original state (default state).

In the presented realization variants (i), (ii) and (iii) it is of advantage if the signaled with the signals S2, S5, S7, S8, operation mode switching to be confirmed by these signals receiving Umschaltsteuerungsmitteln each with a tenth signal S10 before the operation mode switching is performed by the first switching USM1.

<figref idrefs="f0003">FIGURE 3</figref> shows a second data sink / source DSQ2 a preferably as "Public Switched Telephone Network (PSTN)" or "Integrated Services Digital Network (ISDN)" designed circuit-switched network LVN and preferably configured as Internet packet-switched network PVN consisting of a data terminal device DEE and a as data processing / data transfer device designated universal device DVÜG for automatic processing of data and for transmitting and receiving data in both the packet switched or from the packet-switched network and the circuit switched in or out of the circuit-switched network. In the data processing / data transmission device DVÜG these are in<figref idrefs="f0002">FIGURE 2</figref> illustrated data processing device DVG and in the <figref idrefs="f0002">FIGURE 2</figref> illustrated data transmission device DUE to form a constructional and functional unit are summarized.

The data terminal device DEE contains the first central control unit ZSE1 that control facility STM and the first terminal device / transmission device interface EÜSS1. The first central control unit ZSE1, serves to control the functional flows in the data terminal device DEE, and is connected both to the control facility STM and to the first terminal device / transmission device interface EÜSS1. About the first terminal device / transmission device interface EÜSS1 the data terminal device DEE is connected to the data processing / data transmission device DVÜG having a third terminal device / transmission device interface EÜSS3 for this connection. The connection between the data terminal device DEE and the data processing / data transmission device DVÜG the first line link LV1 or the first air link FRV1 is either again provided.

The data processing / data transmission device DVÜG contains the third terminal device / transmission device interface EÜSS3 a fourth central control unit ZSE4, a second network / transmission device interface NÜSS2, second switching facility USM2 and a second network / device interface NGSS2. The fourth central control unit ZSE4 which serves to control the functional flows in the data processing / data transmission device DVÜG and having third switchover control facility USSM3, is connected to the third terminal device / transmission device interface EÜSS3, the second network / transmission device interface NÜSS2 and the second network / device interface NGSS2 connected.

The third switchover control facility USSM3 the fourth central control unit ZSE4 form with the second switchover facility USM2 a functional unit such that the switchover control facility USSM3 control the switching USM1 what in the <figref idrefs="f0003">FIGURE 3</figref> is represented by the connection between the two agents. The data processing / data transmission device is connected to a DVÜG via the second network / transmission device interface NÜSS2 with the circuit-switched network LVN and the other on the second network / device interface NGSS2 with the packet-switched network PVN.

In the following, based on the explanation of the construction of the second data sink / source DSQ2 the operation of the data sink / source DSQ2 with regard to the elimination of the logical separation between the first applications based on the circuit-switched network LVN, and second applications running on the packet-switched network PVN based explains.

For in the <figref idrefs="f0003">FIGURE 3</figref> Scenario presented is now assumed that the data terminal device DEE is, for example, in the first operation mode, according to the data terminal device DEE is connected via the data processing / data transmission device DVÜG with the circuit-switched network LVN. Of course, the other case is possible in which the data terminal device DEE is in the second operating mode.

The user of the data terminal device DEE now wishes to swap into the second operating mode. The addressed mode change is initiated by the user of the data terminal device DEE that this activating the control facility STM. Then, controlled by the first central control unit ZSE1 this and the first terminal device / transmission device interface EÜSS1 an eleventh signal S11 to signal the operating mode change from the data terminal device DEE on the first line link LV1 or the first air link FRV1 to the third terminal device / transmission device interface EÜSS3 transferred to the data processing / data transmission device DVÜG that relays the signal transmitted from the data terminal device DEE eleventh signal S11 to the third switchover control facility USSM3.

The third switchover control facility USSM3 then generates a twelfth signal S12 and transmits this to the second switching facility USM2. With the transfer of the twelfth signal S12, the second switching facility USM2 be instructed to dissolve the previously used by the data terminal DEE transmission for circuit-switched network LVN and instead set up a new transmission path for packet-switched network PVN. In the<figref idrefs="f0003">FIGURE 3</figref> is indicated by the switch symbol of this process in the second switchover facility USM2. The data terminal device DEE is thereby connected to the packet-switched network PVN. This second mode of operation associated transmission now remains as long connected or set up until in the same way an another operating mode change, this time a change from the second mode to the first mode of operation is initiated by the user.

In order to inform the user of the data terminal as to the mode of operation, the data terminal is, the respective activated operating mode is preferably displayed on a display of the communication device (see. <figref idrefs="f0004">FIGURE 4</figref>). Furthermore, it is possible for data terminals, the priority for voice transmission (telephony) are used (see.<figref idrefs="f0004">FIGURE 4</figref>) And with which a "Voice over IP" connection is not possible to prioritize the connection to the circuit-switched network over the packet switched network. This can be achieved by a time-controlled default setting. This means that if a change of operating mode from the first mode to the second operating mode as described has been made and the data terminal to terminate a session in the second operating mode within a predetermined time is not reset again, done resetting to the initial state (default state) automatically ,

<figref idrefs="f0004">FIGURE 4</figref> shows the implementation of the first data sink / source DSQ1 in <figref idrefs="f0002">FIGURE 2</figref> according to the implementation variant (i) with a cordless telephone SLT as data terminal equipment and data communications equipment, which is connected to the circuit-switched network LVN, and a personal computer PC as a data processing device which is connected to the packet-switched network PVN. The personal computer PC has a BSC next screen (monitor), an input device EV consisting of a keyboard TA and a "mouse" MA, in a system unit SYE that from the<figref idrefs="f0002">FIGURE 2</figref> known devices on. Thus, in the system unit SYE next to the third central control unit ZSE3, also as a USB (Universal Serial Bus) trained second device / transmission device interface GÜSS2 and as Ethernet, DSL interface (Digital Subscriber Line) trained first network / device interface NGSS1 arranged. About a USB connection IEDs, LV2 as a second line connecting the personal computer PC is connected to the cordless telephone SLT. The cordless telephone SLT has a data transmission device, a cordless base station SLB and a data terminal on a cordless handset SLM, which are connected via a radio link FRV1 as first air link with each other. The cordless handset SLM has in addition to a display device AE (screen), a fashioned as a keyboard input unit EGE and consisting of a microphone and an earphone input means EGM the first central control unit ZSE1 and the first terminal device / transmission device interface, a first radio interface EÜSS1 on. The display device AE, the input unit IU and the input means EGM form in the<figref idrefs="f0002">FIGURE 2</figref> Control means shown STM. In the cordless base station SLB are the second central control unit ZSE2 the first Umschaltsteuerungsmitteln facility USSM1, the first switching USM1, designed as a second terminal device / transmission device interface second radio interface EÜSS2, a first network / transmission device interface designed line connection NÜSS1 and another first device / transmission device interface designed USB interface GÜSS1 arranged. About the line connection NÜSS1 the connection to the circuit-switched network LVN is established and the USB interface GÜSS1 is connected via the USB connection IEDs, LV2 with the arranged in the personal computer PC USB interface GÜSS2.

If the cordless base station SLB integrated as cordless data adapter in the personal computer PC, one obtains the second data sink / source DSQ2 accordance <figref idrefs="f0003">FIGURE 3</figref>,