VoIP SIP SDK - A powerful and highly versatile VoIP SDK to accelerate development of SIP applications. Our brand-new SIP SDK provides a powerful and highly versatile solution to add quickly SIP (Session Initiation Protocol) based dial and receive phone calls features in your software applications. It accelerates the development of SIP/ RTP compliant soft phone with a fully-customizable user interface and brand name. The conaito VoIP SIP SDK contains a high performance VoIP conferencing client capable of delivering crystal clear sound even for both low and high-bandwidth users and SIP compatible devices (hardware and software). It enables a worldwide communication over the internet or intern networks either by speaking and/or by text messages and delivers superior voice quality by integrating advanced configurable digital voice processing features including auto gain controller, acoustic echo cancellation, noise cancellation, reverb cancellation and Voice activity detection. Here is a list of the main features of the conaito VoIP SIP client: * Easily make and receive SIP (Session Initiation Protocol) based phone calls through any SIP gateway or SIP compliant IP-Telephony service provider * VoIP conferencing with crystal clear sound even for both low and high-bandwidth users (G711 A-Law, G711 U-Law and iLBC Codec). * Registration on SIP Server (SIP Registrar). * Instant text messaging. * Microphone and Speaker Visualization support. * Microphone and Speaker Volume with Mute support. * Audio device selection. * Fully-customizable user interface. * Packetloss resistant (by using iLBC codec). * Supports OLE Automation (scripting) by providing IDispatch interface and custom interfaces for C/C++ developers. * Works with all kind of Internet connections. * Royalty free licensing * No Yearly/Monthly fee * Very easy to incorporate * VAD (Voice activity detection), Reverb, Echo and Noise cancellation or suppression, AGC (auto gain controller).
Thursday, September 13, 2007
Python and C++ are in many ways as different as two languages could be: while C++ is usually compiled to machine-code, Python is interpreted. Python's dynamic type system is often cited as the foundation of its flexibility, while in C++ static typing is the cornerstone of its efficiency. C++ has an intricate and difficult compile-time meta-language, while in Python, practically everything happens at runtime.
Yet for many programmers, these very differences mean that Python and C++ complement one another perfectly. Performance bottlenecks in Python programs can be rewritten in C++ for maximal speed, and authors of powerful C++ libraries choose Python as a middleware language for its flexible system integration capabilities. Furthermore, the surface differences mask some strong similarities:
'C'-family control structures (if, while, for...)
Support for object-orientation, functional programming, and generic programming (these are both multi-paradigm programming languages.)
Comprehensive operator overloading facilities, recognizing the importance of syntactic variability for readability and expressivity.
High-level concepts such as collections and iterators.
High-level encapsulation facilities (C++: namespaces, Python: modules) to support the design of re-usable libraries.
Exception-handling for effective management of error conditions.
C++ idioms in common use, such as handle/body classes and reference-counted smart pointers mirror Python reference semantics.
Given Python's rich 'C' interoperability API, it should in principle be possible to expose C++ type and function interfaces to Python with an analogous interface to their C++ counterparts. However, the facilities provided by Python alone for integration with C++ are relatively meager. Compared to C++ and Python, 'C' has only very rudimentary abstraction facilities, and support for exception-handling is completely missing. 'C' extension module writers are required to manually manage Python reference counts, which is both annoyingly tedious and extremely error-prone. Traditional extension modules also tend to contain a great deal of boilerplate code repetition which makes them difficult to maintain, especially when wrapping an evolving API.
These limitations have lead to the development of a variety of wrapping systems. SWIG is probably the most popular package for the integration of C/C++ and Python. A more recent development is SIP, which was specifically designed for interfacing Python with the Qt graphical user interface library. Both SWIG and SIP introduce their own specialized languages for customizing inter-language bindings. This has certain advantages, but having to deal with three different languages (Python, C/C++ and the interface language) also introduces practical and mental difficulties. The CXX package demonstrates an interesting alternative. It shows that at least some parts of Python's 'C' API can be wrapped and presented through a much more user-friendly C++ interface. However, unlike SWIG and SIP, CXX does not include support for wrapping C++ classes as new Python types.
The features and goals of Boost.Python overlap significantly with many of these other systems. That said, Boost.Python attempts to maximize convenience and flexibility without introducing a separate wrapping language. Instead, it presents the user with a high-level C++ interface for wrapping C++ classes and functions, managing much of the complexity behind-the-scenes with static metaprogramming. Boost.Python also goes beyond the scope of earlier systems by providing:
Support for C++ virtual functions that can be overridden in Python.
Comprehensive lifetime management facilities for low-level C++ pointers and references.
Support for organizing extensions as Python packages, with a central registry for inter-language type conversions.
A safe and convenient mechanism for tying into Python's powerful serialization engine (pickle).
Coherence with the rules for handling C++ lvalues and rvalues that can only come from a deep understanding of both the Python and C++ type systems.
The key insight that sparked the development of Boost.Python is that much of the boilerplate code in traditional extension modules could be eliminated using C++ compile-time introspection. Each argument of a wrapped C++ function must be extracted from a Python object using a procedure that depends on the argument type. Similarly the function's return type determines how the return value will be converted from C++ to Python. Of course argument and return types are part of each function's type, and this is exactly the source from which Boost.Python deduces most of the information required.
This approach leads to user guided wrapping: as much information is extracted directly from the source code to be wrapped as is possible within the framework of pure C++, and some additional information is supplied explicitly by the user. Mostly the guidance is mechanical and little real intervention is required. Because the interface specification is written in the same full-featured language as the code being exposed, the user has unprecedented power available when she does need to take control.
Saturday, May 26, 2007
CCXML has been used by Voxeo's customers to create any call control application imaginable, including: Back to Back SIP User Agents (B2BUA), SIP redirect servers, SIP load balancers, Virtual or "hosted" IP-PBX and call-center / ACD solutions, click-to-dial SIP call launchers, follow-me-find me applications, and more.
When combined with our VoipCenter SIP Mediaserver, our customers have also used CCXML to deliver speech driven conferencing, call recording platforms, emegency notification / audio broadcast services, auto-attendant applications, telephone surveys, unified messaging platforms, bill payment solutions, voice broadcasting services, emergency notification services, and general speech or touch-tone driven IVR.
CCXML is the call control application standard from the World Wide Web Consortium (W3C), the same standards body that delivered HTTP and HTML -- arguably the two most successful applicaton development standards ever created. CCXML gives VOIP developers total control over how phone calls are placed, answered, transfered, conferenced, routed, and more. CCXML works hand-in-hand with any web application server or platform to enable dynamic, intelligent control over all VOIP calls.
The VoipCenter SIP Application Server software is built on Voxeos proven Call Control XML (CCXML) engine and has routed over one billion calls since its first production deployment in early 2002. CCXML lets any company create intelligent, dynamic SIP applications that can screen, route, transfer, and initiate SIP VOIP calls - including SIP redirect, proxy, and Back-to-Back User Agent (B2BUA) applications. The VoipCenter SIP Application Server also supports least-cost and multi-network call routing with the ENUM route directory standard.