Internet telephone adapter

1. An Internet telephone adapter for setting up voice/data links in line-switching networks and packet-switching networks, comprising:

a base unit for setting up a subscriber terminal interface and a standard data interface;

a subscriber access adapter for connecting the base unit to a service provider for the line-switching networks and the packet-switching networks; and

a transfer method evaluation unit in the base unit which, based on a type of voice/data link identified, performs data conversion between the data on the subscriber terminal interface and the respective packet-switching network and line-switching network.

2. An Internet telephone adapter for setting up voice/data links in line-switching networks and packet-switching networks as claimed in claim 1 , wherein the subscriber terminal interface is an air interface and the standard data interface is a serial interface.

3. An Internet telephone adapter for setting up voice/data links in line-switching networks and packet-switching networks as claimed in claim 2 , wherein the air interface is one of a DECT interface and a GSM interface standardized on the basis of ETSI, and the serial interface is one of a V.24 interface and a USB interface standardized on the basis of ITU.

4. An Internet telephone adapter for setting up voice/data links in line-switching networks and packet-switching networks as claimed in claim 2 , wherein the air interface is one of a Bluetooth interface and a PHS interface.

5. An Internet telephone adapter for setting up voice/data links in line-switching networks and packet-switching networks as claimed in claim 1 , wherein the subscriber access adapter has one of an analog voice modem and a digital ISDN adapter.

6. An Internet telephone adapter for setting up voice/data links in line-switching networks and packet-switching networks as claimed in claim 5 , wherein the subscriber access adapter has a selection unit for selecting data transfer in one of a data format and a voice format.

7. An Internet telephone adapter for setting up voice/data links in line-switching networks and packet-switching networks as claimed in claim 1 , wherein, for an outgoing call, the base unit actuates the subscriber access adapter and, for an incoming call, the subscriber access adapter actuates the base unit for a type of voice/data link.

8. An Internet telephone adapter for setting up voice/data links in line-switching networks and packet-switching networks as claimed in claim 1 , wherein the base unit produces an IP address for a required call party when a voice/data link is identified for a packet-switching network.

9. An Internet telephone adapter for setting up voice/data links in line-switching networks and packet-switching networks as claimed in claim 1 , wherein the data conversion in the transfer method evaluation unit for the packet-switching network includes TCP/IP data protection.

10. An Internet telephone adapter for setting up voice/data links in line-switching networks and packet-switching networks as claimed in claim 1 , wherein the data conversion in the transfer method evaluation unit for the packet-switching network includes a Voice-Over-IP protocol.

11. An Internet telephone adapter for setting up voice/data links in line-switching networks and packet-switching networks as claimed in claim 1 , wherein a standardized cordless subscriber terminal is registered on the base unit.

12. An Internet telephone adapter for setting up voice/data links in line-switching networks and packet-switching networks as claimed in claim 1 , wherein, when a voice/data link is identified for a line-switching network, the base unit actuates the subscriber access adapter such that the service provider connected thereto selects the line-switching network for a voice/data link.

13. An Internet telephone adapter for setting up voice/data links in line-switching networks and packet-switching networks as claimed in claim 1 , wherein the subscriber access adapter is incorporated in the base unit.