Digium VPMADT032 32 channel hardware echo cancellation module

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

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 VPMADT032 may be used with Digium's twenty-four port analog card, the TDM2400P, Digium's eight-port analog card, the TDM800P, and will be used on future Digium interface cards.