Patent ID: 8842689

Claim:
A communication device, comprising: a graphical user interface (GUI); a plurality of programmable soft keys coupled with the GUI; and internal circuitry of the communication device configured to invoke a cross cluster extension mobility (CCEM) service for the communication device responsive to a user pressing at least one of the plurality of programmable soft keys on the communication device, the communication device operable to: provide the user with a personalized telephony service upon successful invocation of the CCEM; and establish the personalized telephony service based at least in part upon a configuration file each associated with the user, wherein the communication device is registered as a first local device on a local cluster and the personalized telephony service is established by: registering as a second local device on a remote cluster that is a home to the user; and downloading the configuration file from the remote cluster; and wherein the communication device is further configured to provide a plurality of telephony functions to control Internet Protocol (IP) telephony devices; wherein the plurality of telephony functions comprises a Trivial File Transfer Protocol (TFTP) service; and wherein the TFTP service comprises configuring one or more TFTP parameters to accommodate file transfer between the local cluster and another cluster.