It's really a big problem for us who are the VoIP ITSPs, wholesalers, distributors, retailers even the end-users.Their business is declined and the user is dissatisfied.

Now the VGCP is created for this issue, which can bypass the blocking with good voice quality.

VoiceGuard VoIP anti-blocking solution, circumvent VoIP blocking, surpass conventional VPN:
* work with any 3rd party ATA/Softphone/SIP Server
* can't be blocked due to not using fixed port either for TCP or UDP
* a proprietary layer 2 link protocal, thus not to compromise voice quality and overhead

Lynn
Homepage: SpeedVoIP - VoIP Blocking, VPN, Encryption, SIP Adapter, ATA, Gateway
MSN: svoipsales@hotmail.com
Skype: svoipsales