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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.
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sip stack
mix and match
Cows and Bulls
SIP activeX
sip gateway
distributed development
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VaxVoIP SIP activeX SDK: http://www.vaxvoip.com/vaxvoipsip/VaxSIPUserAgentSDK.zip
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Zoiper Free is a IAX and SIP softphone compatible with the Asterisk platform as any other SIP or IAX capable system. Zoiper Free Edition features include:
* SIP + IAX/IAX 2 protocols
* STUN support
* STUN server per account
* T.38 fax support
* Echo cancellation
* DTMF tones sending
* DSCP support
* Support for multiple audio devices
* Automatic user registration
* Call transfer
* Hold function
* Codecs: GSM, ulaw, alaw, speex, ilbc
* Adaptive Jitter Buffer
* Call history
* Address book
* Quick dial panel
* Optional Automatic pop-up window for incoming call
* Always on top
* Call logs
* Voice mail message information
* Account password encryption
* Upgrade notification
* Adjustment of audio device
* Codecs priority
* Portable storage compatibility
* Multilanguage support
Re-branded Zoiper:
* Basic: colours, name and logo of your choice;
* Re-branding with additional development: e.g. changing the language; adding, disabling, removing of menus/options/buttons; adding functionalities;
* Complete: you can go for complete change of the interface and functionality.
Info about Zoiper OEM can be obtained at zoiper@attractel.com
Zoiper Biz, the advanced version of Zoiper Free, gives more features:
* Native conferencing
* API
* TLS/TCP support with SIP
* TLS with SRTP support
* g.729 (optional)
* Mail program plug-in: Outlook integration
* Callto URL protocol
* Automatic provisioning (XML)
* Call forward
* Auto answer
* Incoming URL handling
* Automatic opening of incoming URL
* Access voice mail message with one button
* Attended transfer (native)
* Call recording (Single file recordings)
* Command line dialing
* Custom ring tones
* Open URL on different call events
* Call history
* Call transfer
* Unlimited number of accounts
* Changeable number of lines (up to 6)
* More!
Both Zoiper editions may be customized to unique customer requirements.
Zoiper Free IAX and SIP softphone: http://www.zoiper.com/downloads/free/win/zoiperfree.exe
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