eSoft is shipping a software reference design for IADs (integrated access devices) and SOHO PBXs (small office home office private branch exchanges) running Linux or VxWorks. The design was developed using Radvision tools, and can be ported easily to VoIP products based on Intel XScale IXP425 network processors, eSoft says.

IADs are devices typically installed by carriers at customer sites, where they aggregate multiple types of voice and data lines for routing to the carrier's network. PBXs are private telephone networks operated within an enterprise. eSoft says that it has already licensed its design to five leading VoIP product vendors.

E-Soft says it built its reference design using an IP Phone and IAD developer toolkit from Radvision, which markets the Ensemble line of tools for building embedded wireless and communications systems. The Radvision toolkit provided eSoft with a call control system, as well as protocol stacks for both SIP (session initiation protocol) and H.323, it says, and enabled it to “seamlessly integrate” the transport and call feature layers, as well as the gateway and phone applications for VoIP.

eSoft says the design takes advantage of advanced features of Intel's IXP425 network processor, enabling equipment developers to create high-performance, differentiated devices that support a variety of voice terminals, including SIP or H.323 IP terminals as well as PSTN (public switched telephone network) analog phones. The design also supports WiFi for the creation of wireless hotspots, eSoft says, along with advanced VoIP features including echo cancellation, automatic gain control, voice activity detection, jitter elimination, and packet loss concealment.

“Our E-Soft IAD reference design offers combined router, firewall/NAT, VoIP, and wireless functionality. [It helps] OEMs or ODMs develop VoIP-enabled APs, VoIP gateways, and other IP-based communication devices,” said eSoft VP Michael Su.

 
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