Cisco Technology, Inc.

Atul Trasi

Daniel Scott Keller

Ho Bao

Susan Marie Sauter

Chunfeng Huang

In certain embodiments, a system comprises a connection to a network and an application server providing a cross cluster extension mobility (CCEM) service configured to receive a request from a user to log into the CCEM service from a telephony device connected to the network, prompt the user via the telephony device to provide a user ID, determine whether the user is logging in from a home cluster or a remote cluster, and perform a local extension mobility login for the user.

Cross cluster extension mobility in internet-protocol telephony

A system is disclosed. The system has a call data receiver arranged to receive call data comprising number data indicative of a telephone number associated with a call connection request. The system also has a translator arranged to translate the received number data to obtain translated number data indicative of another telephone number. There is also a number data associator for associating the call connection request with the translated number data.

Device based emergency services for cross cluster extension mobility

A method to support cross cluster extension mobility (CCEM) in a communication network, which includes a plurality of clusters, each of the plurality of clusters including a call manager, the method includes receiving a request for cross cluster extension mobility from a user on a first telephony device located in a first cluster; adding a second telephony device in a home cluster for the user, only if the first cluster is different from the home cluster. The method further includes performing extension mobility login for the user on the first telephony device; and configuring a Trivial File Transfer Protocol (TFTP) service parameter of the call manager in the first cluster.

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Potomac Falls, VA, United States of America

Atul Trasi