[asterisk-users] Digits and Vestec

[Richard Kenner]

I installed the Vestec system and am testing out using it to get strings of
digits (e.g. conference numbers).  The sample grammer just allows saying 
"zero", but almost everybody will read it it "oh".  But when I try to
add that as an alternative in the grammer (either the word "oh" or
phonetically as "{ow:zeroalternate}"), recognition accuracy goes way down.
Does anybody know a good way to do this?