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Notícias

New Hardware

New Hardware and Software High Performance Echo Cancellation Solutions

Digium®, Inc., during AstriConTM 2007, announced a new Hardware echo-cancellation module and a software-based High Performance Echo Cancellation solution for carrier-class voice networks. These two solutions are added to Digium's existing hardware echo-cancellation modules. These new solutions improve audio quality and reduce VoIP infrastructure costs.

The new Digium High Performance Echo Cancellation (HPEC) software solution eliminates the need for the tuning and training sometimes required to control echo conditions in Asterisk-based voice systems. The HPEC is G.168 compliant and toll-quality as determined by AT&T's Voice Quality Assessment Labs using a stringent series of subjective and standardized, objective tests. Digium HPEC software outperformed AT&T's benchmark lab echo cancellers in all testing categories.

The Digium VPMADT032 hardware echo-cancellation module was created to work in conjunction with Digium's 8-port TDM800P and 24-port TDM2400P cards. The VPMADT032, like the Digium VPMOCT128 and Digium VPMOCT64 modules, provides a more successful echo-cancellation solution because it removes the burden of processing from the PC. Hardware echo cancellation is advantageous when handling large call volumes or a high number of channels that would otherwise stress the CPU and result in the potential for poor audio quality.

In addition to the VPMADT032, Digium® also recently released the AEX800 analog telephony card. The AEX800 is the PCI-Express version of the Digium TDM800P. The AEX800 is an 8 port analog interface card which supports combinations of station and/or trunk/line modules for a total of eight (8) interfaces. Like the PCI-based TDM800P, the AEX800 provides an industry first with 8 standard two-wire, RJ-11 interfaces on a single card bracket. This eliminates the need for multiple brackets, external dongles, or splitters. In doing so, the AEX800 reduces part complexity, cable clutter, and points of failure.

The optional VPMADT032 hardware echo cancellation module provides 1024 taps (128 milliseconds) of echo cancellation for superior echo cancellation on both types of analog interfaces. If the hardware echo cancellation module is not installed, the AEX800 may be used in conjunction with Digium's High Performance Echo Cancellation (HPEC) software.