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Voice Over IP Protocol - VoIP - voice-over-IP Hardware and Standards News and Discussions
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Posted by speedvoip on June 9, 2009, 4:59 am
1. Overview
Yahoo messenger, Skype, Microsoft Messenger and Vonage offer a subscriber
the ability to "call" someone using Softphone/Gateway ATA/IPPhone/IAD.
However, several ISPs are blocking or degrading this service in order to
force a consumer to use a ISP sponsored service. States such as the UAE
block this technology outright while US corporations, such as Clearwire,
claim that they might degrade the quality of competing services by adding
choppy and delayed services.
SpeedVoIP is a leader in circumventing VoIP blocking imposed by ISP or
Telco. For vision of Net Neutrality, VoiceGuard™ is created to address a
growing number of ISPs who either degrade or block voice services over
their networks. VoiceGuard™ gives choice back to the subscribers or
customers of ITSP.
2. Technology
※VGCP(Voice Guard Control Protocol)
VGCP is a proprietary layer 2 link protocol working at between IP stack
and nic driver for VoIP anti-blocking. The core patent-pending VGCP is
industrys most state-of-the-art voice service provider class security
protocol whose scalability and flexibility results in not to compromise
voice quality and overhead. VGCP controls and monitors full voice
signaling and media flow intelligently, meanwhile disguises sip and rtp
packets into normal allowed data packets such as DNS and TFTP, and makes
two-way encryption and decryption driven by user-customized policy. VGCP
is fully transparent to upper SIP proxy or UA which means VoiceGuard™ can
work with any 3rd-party Softphone/ATA/Gateway/IPPhone/IADs and SIP proxy
or server not like some competitors which take effect on their own device
and softswitch.
※SidePass
Due to unique architecture, when deploying VoiceGuard™ Border
Controller(VGBC) at customer CPE side, VGBC can work in the way similar to
that of soho router, but it only encrypts and decrypts SIP and RTP packets
on link layer, not to handup these packets to IP stack for forwarding
while bypassing other data packets originating from SIP terminals. In this
scenario, peak throughput and minimal CPU overhead can be easily achieved.
※TrafficDisturb
Current leading carrier-class VoIP blocking platform such as NarusInsight
can detect VoIP traffic with a special algorithmtraffic classification in
the dark which filters VoIP traffic based on behavioral-signature model.
Compared with previous one of payload-signature model, NarusInsight is
more sophisticated and robust. After deep study into traffic behavior of
SIP UA, Proxy and Registrar, VoiceGuard™ can real-time incorporate
light-weight traffic for puzzling and bypassing VoIP blocking system
without consuming more bandwidth and compromising voice quality. Even in
some circumstance, VoiceGuard™ can simulate traffic behavior of universal
data networking protocol such as OICQ, MSN and so on.
3. 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.
4. Technical Specification
• UDP
• TCP
• RTP/RTCP
• T.38 Fax
• SIP - RFC3261~3266
• STUN - RFC3489
• Symmetric Response - RFC3581
• Dns/Tftp/Radius wrapper
5. How it works and deployment
6. VoiceGuard™ Products ( Hardware and Software Option)
• VoiceGuard™ Standalone Client (VGSC) for Windows – Perform encryption
for any brands of ATA/Softphone, such as Linksys PAP2 & X-lite
• VoiceGuard™ Client SDK (VGSDK) - Incorporate voip anti-blocking
capability into existing legacy softphone and dialer running on
Windows(Softphone/Dialer customization service is also available with
VGSDK)
• VoiceGuard™ SPE VoIP Adapter (VGSPE) – VoIP anti-blocking ATA device
which is available in 1 - 4 FXS & FXO ports
• VoiceGuard™ Border Controller (VGBC) – Support any brands of
ATA/Softphone for existing legacy ATAs, such as Linksys PAP2
• VoiceGuard™ Communicator (VGCommunicator) – Fully SIP compatible
Softphone/Dialer for PC2Phone and PC2PC services
7. VoicePass™ Service Plan for Residential and Business User
VoicePass™ is new kind of service specially for bypassing VoIP blocking
imposed by ISP for residential and business user. It allows subscriber to
use VoIP freely in blockage region such as Middle East and Africa without
compromising of voice quality. Outgoing and incoming call is always
available dependent upon what ITSP or service provider supplies. With
VoicePass™ subscription, zero configuration setup is at your finger. What
you do only is to enjoy cheap VoIP rate and crystal voice. 24x7 support
assures communication anytime and anywhere.
Key benefits:
 Work with any ITSP and service provider
 Minimal overhead and crystal voice quality
 Easy-to-use and cost-effective
 Zero configuration setup
 Surpass conventional VPN scenario
cindy
SpeedVoIP Communication Technology Co.,Ltd
Tel: +86 755 25504959
Fax: +86 755 25336159
Mobile: +86 15099936503
Email: cindy@speed-voip.com
MSN: svoipsalessilver@hotmail.com
Skype: svoipsalessilver
Yahoo: svoipsilver
Technical support: jlsnmp@163.com
Website: http://www.speed-voip.com
http://www.voiceguardnet.com
http://www.voicepassnet.com
--
SpeedVoIP Debuts VoIP Anti-Blocking.
VoiceGuard™ is versatile and powerful VoIP anti-blocking solution for ITSP
and end-user which can protect call completion and lead to maximum service
duration while prevent revenue leakage for ITSP, which can work wit
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