H - Electricity – 04 – M
Patent
H - Electricity
04
M
H04M 3/50 (2006.01) H04L 12/56 (2006.01) H04M 3/487 (2006.01)
Patent
CA 2481636
In providing an information assistance service, information assistance calls are routed through a telephone carrier switch to information/call centers for handling the calls. For each call, the carrier switch establishes a Voice over Internal protocol (VoIP) call session, and conducts handshaking with a redirect server in an information assistance system, e.g., in accordance with a session initiation protocol (SIP). In response to an Invite message to the redirect server, the redirect server provides a list of available call centers in a Multiple Choices response message to the carrier switch. The latter negotiates with ones of the call centers on the list to set up the VoIP call session.
Mbm Intellectual Property Law Llp
Metro One Telecommunications Inc.
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