Back to results
US 6,674,746 B1Granted
Method and apparatus for voice over internet protocol swapping in a communications system
AssigneeNortel Networks Limited
InventorJohn X. Lamarque, III
Life of this patent
Estimating the term…
Abstract
A method and apparatus in a communications system for routing a call. A request is received from a user, at a first terminal, during a call to switch the call from a packet based network to a circuit switched network. Responsive to receiving the request, the call is switched to a second terminal associated with the user, wherein the second terminal uses the circuit switched network and wherein the call is switched to the second terminal without terminating the call.
Claims25
A method in a communications system for routing a call, the method comprising:
- receiving a request from a user, at a first terminal, during a call to switch the call from a packet based network to a circuit switched network;
- and
- responsive to receiving the request, switching the call to a second terminal associated with the user, wherein the second terminal uses the circuit switched network and wherein the call is switched to the second terminal without terminating the call;
- wherein the step of switching comprises:
- creating a path from the second terminal on the circuit switched network to a destination terminal;
- and
- continuing the call using the path on the circuit switched network.
4 more elements
A method in a communications system for routing a call, the method comprising:
- receiving a request from a user, at a first terminal, during a call to switch the call from a packet based network to a circuit switched network;
- and
- responsive to receiving the request, switching the call to a second terminal associated with the user, wherein the second terminal uses the circuit switched network and wherein the call is switched to the second terminal without terminating the call;
- establishing a path from the second terminal on the circuit switched network to the destination terminal;
- and
- responsive to an answer at the second terminal, using the path to continue the call without interruption.
3 more elements
A method in a communications system for routing a call, the method comprising:
- receiving a request from a user, at a first terminal, during a call to switch the call from a packet based network to a circuit switched network;
- and
- responsive to receiving the request, switching the call to a second terminal associated with the user, wherein the second terminal uses the circuit switched network and wherein the call is switched to the second terminal without terminating the call;
- wherein the first terminal has a first path to a switching node and a second path from the switching node to a destination node and wherein the step of switching comprises:
- creating a third path to the second terminal on the circuit switched network;
- and
- joining the third path to the second path, wherein the second terminal is joined into the call.
4 more elements
A method in a communications system for routing a call, the method comprising:
- receiving a request from a user, at a first terminal, during a call to switch the call from a packet based network to a circuit switched network;
- and
- responsive to receiving the request, switching the call to a second terminal associated with the user, wherein the second terminal uses the circuit switched network and wherein the call is switched to the second terminal without terminating the call;
- wherein the second terminal is associated with the user in a database;
- and
- wherein the database is located in a switch.
3 more elements
A method in a communications system for routing a call, the method comprising:
- receiving a request from a user, at a first terminal, during a call to switch the call from a circuit switched network to a packet based network;
- and
- responsive to receiving the request, switching the call to a second terminal associated with the user, wherein the second terminal uses the packet based network and wherein the call is switched to the second terminal without terminating the call.
A communications system comprising:
- a circuit switched network;
- a packet based network;
- a first terminal connected to the packet based network;
- a second terminal connected to the circuit switched network;
- a switch connected to the circuit switched network and the packet switched network, wherein the switch has a plurality of modes of operations including:
- a first mode of operation, responsive to receiving a request to switch a request from the first terminal to switch to an active call between the first terminal and a destination terminal from the packet based network to the circuit switched network, in which the switch establishes a first path to the second terminal;
- and
- a second mode of operation, responsive to establishing the first path, in which the switch joins the first path to a second path to the first terminal and to a third path to the destination terminal.
5 more elements
A switch comprising:
- a plurality of communications ports;
- a switch fabric connected to the plurality of communications ports;
- and
- a processing unit, wherein the processing unit controls routing of calls through the switch fabric;
- wherein the processing unit, responsive to receiving a request from a first terminal in communication with the switch through a first path using a packet based network to move a call in progress to a circuit switched network, establishes a second path to a second terminal associated with a user and joins the second path to the call in progress, wherein the second terminal is used to continue the call in progress;
- and
- wherein the processing unit sends a message to release at least a portion of the first path using the packet based network such that the second path and any remaining portion of the first path use the circuit switched network.
4 more elements
A computer comprising:
- a communications unit, wherein the communications units handles receiving and transmitting packets in a packet based network;
- and
- a processing unit, wherein the processing unit routes packets received by the communications unit and wherein responsive to receiving a request from a terminal handling a voice call in progress to reroute the voice call in progress to a circuit switched network, the processing unit sends a request to a circuit switched network to reroute the call through the circuit switched network.
A communications system for routing a call, the communications system comprising:
- receiving means for receiving a request from a user, at a first terminal, during a call to switch the call from a packet based network to a circuit switched network;
- and
- switching means, responsive to receiving the request, for switching the call to a second terminal associated with the user, wherein the second terminal uses the circuit switched network and wherein the call is switched to the second terminal without terminating the call;
- wherein the switching means comprises:
- creating means for creating a path from the second terminal on the circuit switched network to a destination terminal;
- and
- continuing means for continuing the call using the path on the circuit switched network.
4 more elements
A communications system for routing a call, the communications system comprising:
- receiving means for receiving a request from a user, at a first terminal, during a call to switch the call from a packet based network to a circuit switched network;
- and
- switching means, responsive to receiving the request, for switching the call to a second terminal associated with the user, wherein the second terminal uses the circuit switched network and wherein the call is switched to the second terminal without terminating the call;
- establishing means for establishing a path from the second terminal on the circuit switched network to the destination terminal;
- and
- using means, responsive to an answer at the second terminal, for using the path to continue the call without interruption.
3 more elements
A communications system for routing a call, the communications system comprising:
- receiving means for receiving a request from a user, at a first terminal, during a call to switch the call from a packet based network to a circuit switched network;
- and
- switching means, responsive to receiving the request, for switching the call to a second terminal associated with the user, wherein the second terminal uses the circuit switched network and wherein the call is switched to the second terminal without terminating the call;
- wherein the first terminal has a first path to a switching node and a second path from the switching node to a destination node and wherein the switching means comprises:
- creating means for creating a third path to the second terminal on the circuit switched network;
- and
- joining means for joining the third path to the second path, wherein the second terminal is joined into the call.
4 more elements
A communications system for routing a call, the communications system comprising:
- receiving means for receiving a request from a user, at a first terminal, during a call to switch the call from a circuit switched network to a packet based network;
- and
- switching means, responsive to receiving the request, for switching the call to a second terminal associated with the user, wherein the second terminal uses the packet based network and wherein the call is switched to the second terminal without terminating the call.
A computer program product in a computer readable medium for routing a call, the computer program product comprising:
- first instructions for receiving a request from a user, at a first terminal, during a call to switch the call from a circuit switched network to a packet based network;
- and
- second instructions, responsive to receiving the request, for switching the call to a second terminal associated with the user, wherein the second terminal uses the packet based network and wherein the call is switched to the second terminal without terminating the call.
Dependencies are inferred from the claim text.