http://www.speed-voip.com/vgclientsdkcomparison.html

VoiceGuard™ is versatile and powerful VoIP anti-blocking solution for VoIP wholesaler which can protect call completion and lead to maximum service duration while prevent revenue leakage for VoIP business, which can work with any 3rd-party SIP proxy and termination server.

• VoiceGuard™ Border Controller(VGBC) – hardware

Key Features

·  Maximum call completion rate and maximum voice service duration

·  SIP core standards and a variety of drafts supported

·  Proprietary link layer protocol for controlling

·  Any 3rd-party SIP Proxy/Registrar/SBC supported

·  The most comprehensive codec including g.711/g.723/g.729ab/iLBC/gsm/speechX supported

·  Bypassing Narus and Verso platform detection

·  Flexible user-customized encryption policy driven

·  Strict call path protection and security up to termination

·  Only simultaneous signaling/media/T.38 fax packet support across any firewall.

·  No network or firewall modification is required.

·  Excellent voice quality without any latency and performance compromise

·  Available on all major platforms.