Patent ID: 7920690

Claim:
A method comprising: a) receiving from a telephony switch first information indicative of an initiation of a voice call from a first telephony device having a first directory number to a second telephony device having a second directory number; b) determining to route the voice call via a public switched telephone network or via a packet switched network based on the second directory number; c) sending to the telephony switch second information instructing the telephony switch to either route the voice call via the public switched telephone network or via the packet switched network; d) determining a first address for a first multimedia client, which is associated with, but distinct from the first telephony device, based on the first directory number; and c) sending the address for the first multimedia client to a call server, which will forward the first address for delivery to a second multimedia client associated with the second telephony device, when the voice call is routed via the packet switched network.