Sonus Networks, Inc.

Ti-yuan Dean Shu

Wassim Matragi

David Lapsley

Sri Chary

Miri Mansur

Joby Joseph

Kenneth Dumble

Jonathan Klotzbach

Mark Topham

Zhufeng Huang

Rahul Jain

Ramanathan K Ramanathan

The invention features systems and methods for detecting and mitigating network attacks in a Voice-Over-IP (VoIP) network. A server is configured to receive information related to a mitigation action for a call. The information can include a complexity level for administering an audio challenge-response test to the call and an identification of the call. The server also generates i) a routing label based on the identification of the call, and ii) a script defining a plurality of variables that store identifications of a plurality of altered sound files for the audio challenge-response test. Each altered sound file is randomly selected by the server subject to one or more constraints associated with the complexity level. The server is further configured to transmit the script to a guardian module and the routing label to a gateway.

Real-time network attack detection and mitigation infrastructure

Data associated with an E.164 number mapping (ENUM) request can be received from an element of a telecommunications network. Logical trunk-group information and gateway information can be associated with the ENUM request. A call is managed by the computing element through a packet-based network based at least in part on the logical trunk-group information and the gateway information.

Providing telecommunication services based on an E.164 number mapping (ENUM) request

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Andover, MA, United States of America

Ti-yuan Dean Shu