For political & economic reasons, ISP may block VoIP in your country. To protect your VoIP business & profit, SpeedVoIP Communication Technology Co., Ltd. is providing Security VoIP software solution, VGSC 2008, which installed on client side’s PC.
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 Softphone/ATA/Gateway/IPPhone/IAD and 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
• Small footprint terminal SDK .
• Available on all major platforms.
Pls review: SpeedVoIP - VoIP Blocking, VPN, Encryption, SIP Adapter, ATA, Gateway for details & get free trial at Download - VoIP VPN, Blocking, ATA, Secure Adapter Encryption

__________________
Lynn
MSN: svoipsales@hotmail.com
Skype: svoipsales
Website: www.speed-voip.com