Released on = February 13, 2006, 10:56 pm

Press Release Author = VaxSoft Inc

Industry = Software

Press Release Summary = SIP activeX to add make/receive phone calls feature in your
apps and web pages.

Press Release Body = VaxSoft Inc Releases VaxVoIP SIP SDK, Another Brakthrough
Toolkit for VOIP Telephony Development

VaxVoIP SIP SDK provides tools and components to quickly add SIP (Session Initiation
Protocol) based IP-Telephony make and receive phone calls feature in your web pages
and software applications. It accelerates the development of SIP based soft phone
with your own GUI (graphical user interface) and brand name.
It delivers superior voice quality by integrating advanced digital voice processing
features including acoustic echo cancellation, noise cancellation and adaptive
jitter buffering.
In order to eliminate the acoustic feedback an echo canceller is introduced in the
VaxVoIP SIP SDK.

- ACOUSTIC ECHO CANCELLATION OR SUPPRESSION
In order to eliminate the acoustic feedback an echo canceller is introduced in the
VaxVoIP SIP SDK. Hands-free or Internet telephony imposes several problems. The
principal one is due to the coupling between loudspeaker and microphone. The
loudspeaker signal is echoed back to the microphone and transmitted back to its
origin. As a result the far-end participant perceives this as an echo.

- NOISE CANCELLATION OR SUPPRESSION:
VaxVoIP SIP SDK offers advanced Noise Cancellation technology that allows
significant suppression of any background noise and provides high quality of output
speech.

- ADAPTIVE JITTER BUFFER
Jitter buffers are used to smooth delay variations in received audio by buffering
the packets and adjusting their rendering. The result is a smoother delivery of
audio to the user.

- PACKET LOSS CONCEALMENT
Packet Loss Concealment (PLC) is a technique used to mask the effects of lost or
discarded packets. PLC is generally effective only for small numbers of consecutive
lost packets, for example a total of 20-30 milliseconds of speech, and for low
packet loss rates.

- NAT AND FIREWALLS FRIENDLY
User can set SIP outbound proxy inorder to make and receive phone calls behind the
NAT/firewall.

Web Site = http://www.vaxvoip.com

Contact Details = Address: 12-A, St # 2, CROWN PARK BAGHBANPURA, LAHORE
PAKISTAN

Phone Number: 92-300-8448545
Email: hasnat@vaxvoip.com