Encapsulation, compression and encryption of PCM data

• US 20030016803A1
• Filed: 07/23/2002
• Published: 01/23/2003
• Est. Priority Date: 07/23/2001
• Status: Active Grant

• Current Assignee: SecureLogix Corporation
• Original Assignee: SecureLogix Corporation
• Inventors: Smith, Kirk, Pickens, Keith S., Heilmann, Craig, Schmid, Greg
• Granted Patent: US 6,700,964 B2
• Time in Patent Office: Days
• US Class Current: 379/201.01
• CPC Class Codes: H04L 12/4633 Interconnection of networks using encapsulation techniques, e.g. tunneling
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04L 41/06 Management of faults, events, alarms or notifications
• CPC Class Codes: H04L 41/0893 Assignment of logical groups to network elements
• CPC Class Codes: H04L 41/0894 Policy-based network configuration management
• CPC Class Codes: H04L 41/5087 wherein the managed service relates to voice services management of VoIP services H04M7/0081
• CPC Class Codes: H04L 43/0811 by checking connectivity
• CPC Class Codes: H04L 63/0263 Rule management
• CPC Class Codes: H04L 63/0272 Virtual private networks
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/061 for key exchange, e.g. in peer-to-peer networks cryptographic mechanisms or cryptographic arrangements for key agreement H04L9/0838
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04L 63/1408 by monitoring network traffic monitoring network traffic per se H04L43/00
• CPC Class Codes: H04L 63/164 at the network layer
• CPC Class Codes: H04L 63/20 for managing network security; network security policies in general filtering policies H04L63/0227
• CPC Class Codes: H04M 2203/609 Secret communication
• CPC Class Codes: H04M 2207/35 virtual private networks
• CPC Class Codes: H04M 7/009 in systems involving PBX or KTS networks
• CPC Class Codes: H04M 7/0093 signalling arrangements in networks
• CPC Class Codes: H04M 7/129 Details of providing call progress tones or announcements
• CPC Class Codes: H04M 7/1295 : Details of dual tone multiple frequency signalling

Abstract

A system and method to provide secure access across the untrusted public switched telephone network is described. The system and method can be initiated by a security policy defining actions to be taken based upon at least one attribute of the call.

Claims

1. A virtual private switched telecommunications network for securely communicating between different locations, the network comprising:

a public switched telephone network (PSTN);

at least two telephone appliances linked to the PSTN; and

at least two telephones connected to the at least two telephone appliances.