[quote:569b49cd1a="miaolin"]have you tried all the options of cidstart and cidsignalling in zapata.conf?[/quote]
Yes, but none worked. Turns out the OpenVox card works fine with Bell/Ring : It's just that Asterisk 1.4 changed the way CID is reported: ${CALLERID}, ${CALLERIDNUM} and ${CALLERIDNAME} are now empty, and you must use ${CALLERID(num)} and ${CALLERID(name)} instead.
IMHO, with so much disparate information on Asterisk on the web, breaking compatibility is really not a good idea.
Turns out NoOp() won't work if verbosity is not high enough. To avoid this, always use Verbose() instead. The CID information _was_ picked up by the OpenVox card, but it wouldn't show up in the Asterisk console because of this :-/