Digium VPMADT032 - 128ms Hardware Echo Cancellation Module

The VPMADT032 is a 128ms per-channel echo cancellation module for use with Digium telephony interface cards.

It is compatible with the following Digium cards:

• TDM410
• TDM800P
• AEX800
• TDM2400P
• AEX2400

This module, which offers 128ms (1024 taps) of echo cancellation across all of its channels, improves upon the older VPM100M echo cancellation module, that only offered 32ms of echo cancellation. The VPMADT032 provides the same toll-quality G.168 compliant echo cancellation found in Digium's HPEC software-based commercial echo canceller. The VPMADT032 is immune from any system CPU spikes that might otherwise affect a software-based solution.

The option to purchase the standalone module is ideal should a user already have one of the above cards without the module, as it provides them with the ability to upgrade to full hardware echo cancellation without having to invest in new interface cards.

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By Ian Stringer Used a TDM400 card for 2 years without hardware echo cancellation with Asterisk. Since the most r.. See full review 5 Date Added: Monday 14 November, 2011

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