Lawful interception of multimedia calls
First Claim
1. A method of performing lawful interception of a multimedia call between two or more terminals, the method comprising:
- detecting the initiation of said call at monitoring equipment located in the call path;
forwarding from the monitoring equipment to a gateway, parameters defining at least one of the forward and reverse channels of said call;
emulating a multimedia terminal at said gateway and setting up at least one multimedia call between the emulated terminal and a monitoring terminal, the properties of the call being negotiated in dependence upon the received parameters; and
following the setting up of the first mentioned multimedia call, intercepting forward and/or reverse channel data at said monitoring equipment, routing the intercepted data to said gateway, and transmitting the data to the monitoring terminal over the forward channel of the or each second mentioned multimedia call.
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Accused Products
Abstract
A method of performing lawful interception of a multimedia call between two or more terminals. The method comprises detecting the initiation of said call at monitoring equipment located in the call path, and forwarding from the monitoring equipment to a gateway, parameters defining at least one of the forward and reverse channels of said call. At least one multimedia call is set up from said gateway to a monitoring terminal in dependence upon the received parameters. Following the setting up of the first mentioned multimedia call, forward and/or reverse channel data is intercepted at said monitoring equipment, the intercepted data routed to said gateway, and the data transmitted to the monitoring terminal over the forward channel of the or each second mentioned multimedia call.
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Citations
11 Claims
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1. A method of performing lawful interception of a multimedia call between two or more terminals, the method comprising:
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detecting the initiation of said call at monitoring equipment located in the call path;
forwarding from the monitoring equipment to a gateway, parameters defining at least one of the forward and reverse channels of said call;
emulating a multimedia terminal at said gateway and setting up at least one multimedia call between the emulated terminal and a monitoring terminal, the properties of the call being negotiated in dependence upon the received parameters; and
following the setting up of the first mentioned multimedia call, intercepting forward and/or reverse channel data at said monitoring equipment, routing the intercepted data to said gateway, and transmitting the data to the monitoring terminal over the forward channel of the or each second mentioned multimedia call. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. Apparatus for intercepting a multimedia call between two or more terminals, the apparatus comprising:
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means for receiving from monitoring equipment located within the call path, parameters defining at least one of the forward and reverse channels of said call, following detection of the initiation of said call by the monitoring equipment;
means for emulating a multimedia terminal and means for setting up at least one multimedia call between the emulated terminal and to a monitoring terminal, this means negotiating the properties of the call in dependence upon the received parameters; and
means for receiving intercepted forward and/or reverse channel data from said monitoring equipment, and for transmitting the data to a monitoring terminal over the forward channel (s) of the second mentioned multimedia call (s).
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Specification