[Asterisk-Users] Double digits seen using Grandstream phones

[Rana Dutt]

My attempts to use voice mail from my Grandstream Budgetone 101 phone always
fail because Asterisk is seeing either double digits or dropped digits, no
matter what dtmfmode setting I try. Here is what happens for each mode:

dtmfmode=info, phone set to send INFO 101: every digit is seen double, e.g.
123 is seen as 112233

dtmfmode=rfc2833, phone set to RFC2833: some digits are doubled in random
places, e.g., 123 is sometimes seen as 1123, sometimes as 1233

dtmfmode=inband, phone set to send in-audio: some digits are dropped, e.g.,
123 becomes 23 or 12

I have upgraded the firmware in my phones to 1.0.4.46 and Asterisk is a CVS
from 2/1/04. The codec in the phones is set to PCMU (ulaw) as first
preference, and the sip.conf has disallow=all followed by allow=ulaw for
each phone. Early dial is turned off. 

Can anyone help me? Thanks,

-Ron
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