Methods and apparatus for wiretapping IP-based telephone lines
First Claim
1. A method of monitoring IP telephone calls routed over at least a portion of an IP network, the method comprising:
- determining if an IP telephony device corresponds to a telephone number to be monitored;
in response to determining that said IP telephony device corresponds to a telephone number to be monitored, obtaining information identifying the edge router through which said IP telephony device is coupled to the IP network; and
transmitting a monitor command with an IP address being used by said IP telephony device to the identified edge router.
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Accused Products
Abstract
Methods and apparatus for wiretapping IP telephone calls are described. At the time an IP telephone registers its current IP address and telephone number with a soft switch responsible for routing calls to the IP telephony device a list of telephone numbers to be monitored is checked. If the number being registered is to be monitored, information identifying the edge router through which the IP telephony device connects to the IP network is obtained. The edge router is then sent a monitor message with the IP address corresponding to the telephone number to be monitored. IP packets including the specified IP address are then forwarded by the identified edge router to a monitoring station. Packet forwarding may involve packet duplication with the original packets being allowed to continue on to their original destination and the duplicated packets being forwarded or, alternatively, a simple packet redirection operation.
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Citations
22 Claims
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1. A method of monitoring IP telephone calls routed over at least a portion of an IP network, the method comprising:
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determining if an IP telephony device corresponds to a telephone number to be monitored;
in response to determining that said IP telephony device corresponds to a telephone number to be monitored, obtaining information identifying the edge router through which said IP telephony device is coupled to the IP network; and
transmitting a monitor command with an IP address being used by said IP telephony device to the identified edge router. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus for use in monitoring IP telephone calls routed over at least a portion of an IP network, the device comprising:
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means for determining if an IP telephony device corresponds to a telephone number to be monitored;
means for obtaining information identifying the edge router through which said IP telephony device is coupled to the IP network; and
means for transmitting a monitor command with an IP address being used by said IP telephony device to the identified edge router when it is determined that an IP telephony device corresponds to a telephone number to be monitored. - View Dependent Claims (14, 15, 16, 17)
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18. A method of monitoring IP communications routed over at least a portion of an IP network, the method comprising:
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determining if an IP communications device is to be monitored;
in response to determining that an IP communications device is to be monitored, obtaining information identifying the edge router through which said IP communications device to be monitored is coupled to the IP network; and
transmitting a monitor command with an IP address being used by said IP communications device to be monitored to the identified edge router. - View Dependent Claims (19, 20, 21, 22)
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Specification