VoiceGuard™ Client SDK 

The award-winning VoiceGuard™ Client SDK is powerful and highly versatile programming kit that forms basis of widely used VGSC, designed to incorporate voip anti-blocking capability into existing legacy softphone and dialer running on Windows. It includes all the components developers require including an entire VGSC GUI application source code that demonstrate efficient API usage, and detailed document. The SDK is an IETF standard compliant, and provides high performance API layer for full user control and flexibility.
The VoiceGuard™ Softphone SDK is unique member of VoiceGuard™ family of VoIP anti-blocking solution, designed to dramatically accelerate development of softphone or dialer with necessary bypassing VoIP blocking imposed by ISP.

Key Benefits:

 Seamless Integration with Legacy Softphone or Dialer
 Minimal Overhead and High Call Quality
 Easy to Use and Cost-effective
 Flexible Scalability
 Highly Interoperable with any Third-party Products and Services
 Own Unique Brand or Logo Presentation
 Unlimited Call Session Number and Free Deployment
 No additional Setup
 Royalty-free License Scheme
 One-time Entry Investment only
 No Recurring Payment upon month/Quarter/Year Usage
 Freely available VGPlugin Lite(50 calls) included

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Features: High Throughput Packet Dispatching Engine Flexible Encryption/Decryption Algorithm other than usual XOR and Diffthan Support for Adaption to NAT/FW Traversal Kernel Level Underlying Layer 2 NDIS Compliant Driver Distinct Modular Building Block and Simple to Use API Scalable Policy Driven Scenario for Circumventing ISP Blocking No any Impact on existing Softphone or Dialer Action Extensive Support for the latest SIP and RTP standards Widely Used Audio Codec Support Intuitive Call Trace and Log Mechanism Proprietary Bug Free Memory Management Framework Multi-thread Safety

Architecture:

Packet Dispatching Engine for High Efficiency Packet Delivery Policy Manager for Driving Encryption/Decryption Hash Queue List and Timer for Core Data Structure Executive Machine for Call Control

Configuration and Statistics Packet Identification and Analysis Utility for OS Abstraction API Wrapper

The SDK is delivered with:

Include Files
Import Libraries for DLLs
VoiceGuard™ Engine Driver
VGSC GUI Source Code
Complete Documentation
VGPlugin Lite(50 calls)
Porting and Customization Service(upon request)