Hardware transcoding options for Asterisk

Hi,

I am looking at using hardware transcoding options for Asterisk, probably DSP-based cards/box.

I came across this Signalogic SigC5561 VoIP card that claim to do the HW transcoding for Asterisk, did anyone try this before? Or is there any other h/w based transcoding solution available that can work with Asterisk?

thanks.