SIP Developer Toolkit Architecture
(Click for larger image)Key new features in version 3.1, according to Radvision, include an optional signaling compression module for developing wireless/mobile SIP-based communication devices, Dynamic Local Address (DLA) translation, and enhanced Type of Service (TOS) functionality. These are described as follows:
- Signaling Compression (Sigcomp) -- Version 3.1 features an optional module for Signaling Compression (Sigcomp). SIP messages are text based and not optimized in terms of size. While this is not normally a problem in wireline broadband, it becomes an issue in limited bandwidth applications such as mobile or wireless networks. Consequently, the 3GPP (Third Generation Partnership Project) now requires mandatory message compression through Sigcomp for IMS (IP Multimedia Subsystem) applications and products. The new Sigcomp module meets this requirement, according to Radvision.
- DLA (Dynamic Local Address) Translation for NAT/Firewall Traversal -- NAT traversal for IP communications has become a crucial element in modern communication architecture. Version 3.1 supports "dynamic local address changing". This enables a communication device to dynamically modify an IP address of an internal SIP device during a call. Gateways that mediate between public IP address schema and a private Local Area Network (LAN) make use of dynamic IP addressing.
- Enhanced Type of Service (TOS) Functionality -- Version 3.1 also features new functionality for defining "Type of Service" (TOS) call routing. According to Radvision, this is a particularly crucial feature for SIP-based enterprise communication systems. It allows the developer to set socket options (dialog, transaction, Reg, Subscription levels, etc.) for different types of services. In order to maintain voice quality, traffic from voice or video applications is identified and given priority in routing through a data network.
In addition to the above new features, Version 3.1 has also added support for three new embedded operating systems, bringing the total to 11, the company says.
The SIP Developer Toolkit v3.1 is available now. Pricing was not disclosed.
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