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DW6040 Voice Appliance

The DW6040 Voice Appliance is a state-of-the-art telephony device that provides efficient telephone and fax connectivity via the DIRECWAY® network. The DW6040 is an excellent solution for the enterprise, kiosk, Internet cafe, or telephony markets where reliable low-cost telephony service is needed. This inexpensive add-on provides telephony services that can generate additional revenues for value-added resellers (VARs) and service providers. The DW6040 provides up to four toll-quality telephone or Group 3 facsimile channels via satellite to the PSTN or, optionally, to a Voice over IP (VoIP) network.

The DW6040, a simple addition to the DIRECWAY terminal, provides the transport for carrying telephony traffic via satellite to the DIRECWAY Network Operations Center (NOC). In a typical configuration, a voice gateway at the NOC provides connectivity to the PSTN. The standard H.323 protocol suite is used between the DW6040 and the gateway for call setup and teardown.

Implementing the G.729AB 8Kbps voice codec with echo cancellation, voice activity detection, and comfort noise generation, the DW6040 offers superior telephony quality. Facsimile calls are supported using the T.38 fax over IP protocol to rates of 9.6Kbps. The DW6040 also supports a flexible dialing plan.

Optimized for use with the DIRECWAY system, the voice appliance automatically reserves bandwidth through the DIRECWAY network when each call is initiated. Additionally, the DW6040 and the NOC components prioritize the associated voice stream to ensure end-to-end toll-quality transmission of the call. The prioritization of voice over data significantly improves the quality of service. The DIRECWAY system also facilitates short call set-up times—typically less than four seconds—and low end-to-end delay inside the DIRECWAY network. Transmission efficiency is further improved by compressing the voice packets.

The DIRECWAY NOC equipment routes the voice calls to the PSTN via an H.323 voice gateway. The voice gateway performs the conversion from the H.323 protocol and the PSTN signaling. The voice gateway provides an E1 interface to the PSTN. Multiple voice gateways may be configured at the NOC. A gatekeeper provides the address resolution between the DW6040 and multiple voice gateways. Alternatively, the voice appliance facilitates international long-distance calling to any phone by connecting, via the NOC, directly to a network of multiple Points of Presence (POP) around the world. When integrated with technology from authorized VoIP service providers, the DW6040 supports such advanced features as Interactive Voice Response (IVR) and easy-to-use online account management.

The HNS Vision® Network Management System (NMS) provides monitoring and control of the voice appliance, as well as the DIRECWAY terminal. Downloads of software and configuration parameters are also performed by the NMS.

 

Key System Features