Patent ID: 7640326
Filing Date: 2009-12-29
Classification: H04M

Abstract:
1. A method for supporting centralized voicemail services in a distributed telephony system, the method comprising: receiving at a local call management device a registration message from a remote call management device, the registration message identifying a number for a telephony device managed by the remote call management device and an address for the remote call management device; storing at the local call management device an association between the number for the telephony device managed by the remote call management device and the address for the remote call management device in response to the registration message; receiving at the local call management device a call redirected by the remote call management device, the local call management device operable to couple the call to a voicemail server, the local call management device providing an interface to the voicemail server for the remote call management device; receiving at the local call management device a message waiting indication from the voicemail server, the message waiting indication identifying a telephony device; determining, at the local call management device, whether the local call management device manages the telephony device identified by the message waiting indication; and if the local call management device does not manage the telephony device identified by the message waiting indication, determining the remote call management device managing the telephony device identified by the message waiting indication according to the association and relaying the message waiting indication to the remote call management device.