[asterisk-users] Opinions on Rhino PCI FXO cards

[shadowym]

Just found these new cards.  I was wondering if anyone has any experience or
opinion about them.  Do they use the same hybrid chip as Sangoma or Digium?
What about PCI interface.  It comes with 4 FXO ports onboard which has it's
advantages I suppose.  Does not look like there is any hardware echo can
option though.
http://www.rhinoequipment.com/R4FXOCard.html

Looks like they have a T1 card as well.