New digium hardware

Has anyone used the TDM2400P? I am especially interested in the new echo cancelling module. I have tried the Voicetronix boards, and they have been somewhat unsatisfactory. I have also tried the TDM400, and have had echo problems there as well. I noticed that the 2400 has a VPM100M echo cancelling module available, and that seemed like it might be just what I’ve been looking for as it will take echo cancelling and put it in hardware.

Also, does anyone know if you can turn the VPM100M on and off for individual lines?