Features and Benefits

• Internet Protocol (IP) telephony PCI board with onboard digital signal processors (DSP) and four onboard loop start analog interfaces. Ideal for enterprise-level solutions.
• Application programming interface (API) provides compatibility with existing IP Link applications for ease of development and faster time to market
• Compliance with ITU-T Enterprise Computer Telephony Forum (ECTF)* H.323 Revision 1 specification, including gatekeeper compatibility provides easy interoperability with a variety of IP telephony solutions
• Multiple vocoding algorithm support including ITU-T G.723.1, ITU-T G.711, ITU-T G.729a, MS-GSM, and ETSI-GSM provides the flexibility required for global deployment

• Includes T.38 real-time fax over IP coder support for seamless real-time fax communication over IP. Permits a broader service offering, letting you differentiate your product in the marketplace
• Supported by the regular IP Link SDK Release 3.1 for Windows NT*; will be supported by the standard releases of the IP Link SDK for Windows NT
• Standard IP Link Release 3.1 features include support for Internet protocols including TCP/IP, UDP, and RTP/RTCP
• Advanced features include voice activity detection (VAD) for maximum bandwidth utilization, coder negotiation on the fly, and out-of-band DTMF processing compliant with the International Multimedia Teleconferencing Consortium (IMTC) Interoperability Agreement 1.0
• Performance improvement features include variable jitter buffer control, voice activity detection/silence compression, and embedded high-performance echo cancellation
• Optimized call control API offloads host CPU application processing to minimize system latency, achieve maximum scalability, and optimize resource usage
• Call processing features include echo cancellation, call progress, DTMF detection, tone generation, volume control, noise tolerance, cut-through, and talk-off
• ANSI SCbus and H.100 support for integration with other standards-based CT resource platforms

Applications

• Enterprise bypass IP telephony gateway
• Web-enabled call centers and help desks
• Internet call waiting
• PBX extenders

IP Link Boards: Making the Most of Opportunity

Packet-switched telephony applications are driving the convergence of data networks and the public telephone network. IP Link boards support the H.323 standard for communications across IP networks and a wide variety of vocoder algorithms for complete IP compliance. IP Link boards let you add processing power and ports, as you need them, on a single board. IP Link boards feature a standard Intel?control processor and operate under Windows NT 4.0*.

The combination of extensive IP standards support and open architecture in IP Link boards give you maximum flexibility for building IP gateways and incorporating IP telephony capability into a wide range of computer telephony (CT) applications.

Standards-Based IP Development Platform

The Intel?Dialogic?IP Link DM/IP040-LSI board is a comprehensive, standards-based software and hardware development platform for IP telephony servers. Because it has the DSPs for voice and fax coding over IP, and the analog interfaces on board, the host is free to implement the H.323 processing to optimize performance. The IP Link board complies with the International Telecommunications Union ITU-T H.323 specification (including H.245 and H.225 protocols). H.323 sets standards for audio, video, and data communications across IP networks, without providing guaranteed quality of service (QoS). It also supports gatekeeper functions for address translation and bandwidth management.

IP Link boards support a wide range of popular H.323 conferencing software, including Microsoft NetMeeting*, VocalTec Iphone*, and Intel?VideoPhone. IP Link boards work with all H.323-compliant terminals.

IP Link boards comply with IMTC*/VoIP enhancements and refinements to H.323.

The IP Link board's design also supports important open CT industry standards. The IP Link PCI baseboard supports both the SCbus and ECTF H.100 CT Bus* specifications. The IP Link API software is compatible with ECTF* S.100 call processing standards.

Multiple Vocoder Support

The IP Link DM/IP040-LSI board offers many optimized, low-bandwidth vocoder algorithms for transmitting audio over the IP network, including the ITU-T G.711, G.723.1, and G.729a, along with ETSI and MS-GSM. It includes the T.38 fax-over-IP coder as part of the standard release. These algorithms use a variety of coding techniques, bit rates, and frame sizes to compress audio for managing data network bandwidth. The wide algorithm support of IP Link boards gives you the ability to sell IP-based applications worldwide. The scalable IP Link board's signal processor architecture makes it easy to support new algorithms as they become widely accepted or adopted as standards.

Advanced features include voice activity detection (VAD) for maximum bandwidth utilization, plus embedded high-performance echo cancellation and out-of-band DTMF processing optimized for the IP network. You can fine-tune the IP Link board's jitter buffers for optimum performance.

Scalable Architecture

The architecture provides access to independent, high-performance, firmware-based network protocol and media processing resources that can be operated and integrated on compatible hardware platforms. Also, the open resource architecture gives you the flexibility to easily scale processing and interface resources as needed for future application upgrades or IP telephony server enhancements. Support for standard SCbus and CT Bus connectivity gives you a growth path for incorporating other Dialogic and third-party media and network resources.

Configurations

You can use IP Link board to build complete gateway platforms that bridge the public switched telephone network (PSTN) and the IP network. IP Link boards provide the telephone network interface and mediastream processing resources on a single board. Intel provides the voice and fax coders and H.323 stack to be run on the host CPU. You can access additional Intel?Dialogic?product and third-party resources through IP Link CT Bus/SCbus connections.

Software Support

The DM/IP040-LSI board is supported by the IP Link SDK Release 3.1 for Windows NT* and higher. IP Link boards run under the Windows NT* 4 operating system and comes with a software package containing the NT Native Architecture, Core Software for Windows NT, IPT Software, complete documentation, and gateway demonstration code. Direct Interface APIs are also included. The Direct Interface gives developers flexibility for customizing and controlling the low-level application details.

IP Link Technical Specifications**

Software Requirements

Downloaders, drivers, and libraries are provided for each host operating system (OS) Signal processor OS: SPOX* from Spectron Microsystems*

Host System Requirements

Operating system: Windows NT* 4 for Intel?CPUs

IP Link Product Development Kits: contact us for offerings and customer qualifications

*All company names, products, and services mentioned are the trademarks or registered trademarks of their respective owners.