A mobile communication terminal comprising: a first wireless accessing means for establishing a first communication link between the mobile communication terminal and a communication partner by accessing a first communication network for transmitting packets in a first mode of wireless communication using PPP, Point-to-Point Protocol; controlling means for executing control so as to establish a second communication link between the mobile communication terminal and the communication partner for transmitting packets wirelessly using PPP measuring means for measuring a radio field intensity of the second communication link; switching means for switching a packet-transmitting communication link from one of the first communication link and the second communication link to another of the first communication link and the second communication link based on the radio field intensity measured by the measuring means; and notifying means for notifying, when the packet-transmitting communication link has been switched by the switching means, the communication partner to that effect, a second wireless accessing means (13, 14, 16) for establishing the second communication link and for communicating with a second communication network in a second mode of wireless communication that is different from the first mode, wherein the second wireless accessing means (13, 14) is capable of acquiring the same IP address as an IP address acquired by the first wireless accessing means, is capable of using this IP address to establish a L2 tunnel with the communication partner and is capable of establishing the second communication link by way of this L2 tunnel; a detecting means for detecting that wireless communication is possible for at least one of the first wireless accessing means and the second wireless accessing means (13, 14, 16); and combining means for combining the established first and second communication links to form a single communication channel, wherein the second wireless accessing means (13, 14, 16) is capable to re-perform the establishing of the second communication link, when the packet-transmitting communication link is switched from the second communication link to the first communication link by the switching means and a valid network access point, with which wireless communication is possible for the second wireless accessing means (13, 14, 16), is detected by the detecting means. a first wireless accessing means for establishing a first communication link between the mobile communication terminal and a communication partner by accessing a first communication network for transmitting packets in a first mode of wireless communication using PPP, Point-to-Point Protocol; controlling means for executing control so as to establish a second communication link between the mobile communication terminal and the communication partner for transmitting packets wirelessly using PPP measuring means for measuring a radio field intensity of the second communication link; switching means for switching a packet-transmitting communication link from one of the first communication link and the second communication link to another of the first communication link and the second communication link based on the radio field intensity measured by the measuring means; and notifying means for notifying, when the packet-transmitting communication link has been switched by the switching means, the communication partner to that effect, a second wireless accessing means (13, 14, 16) for establishing the second communication link and for communicating with a second communication network in a second mode of wireless communication that is different from the first mode, wherein the second wireless accessing means (13, 14) is capable of acquiring the same IP address as an IP address acquired by the first wireless accessing means, is capable of using this IP address to establish a L2 tunnel with the communication partner and is capable of establishing the second communication link by way of this L2 tunnel; a detecting means for detecting that wireless communication is possible for at least one of the first wireless accessing means and the second wireless accessing means (13, 14, 16); and combining means for combining the established first and second communication links to form a single communication channel, wherein the second wireless accessing means (13, 14, 16) is capable to re-perform the establishing of the second communication link, when the packet-transmitting communication link is switched from the second communication link to the first communication link by the switching means and a valid network access point, with which wireless communication is possible for the second wireless accessing means (13, 14, 16), is detected by the detecting means.