I am trying to setup a GSM-Card for Asterisk. I currently use a “vgsm I”
from voismart (http://www.voismart.it/) but the driver is very bad
(compile-problems and no echo cancellation).
Is there anybody out there who can recommend me another piece of
hardware (pci card)? I need 1 or better 4 gsm-ports. Should be stable
and have an echo cancelltaion feature. And of course it should be cheap 😉