[Asterisk-Users] Re: Sipura-3000 - silent dial out on FXO port

[Randy Bush]

>> It does work but the customer perceives this delayed second DTMF
>> feedback as "unprofessional" and the sipura as a "toy". I wonder if
>> there is anything that can be done to keep the channel to the caller
>> silent until after the Sipura has sent the DTMF out on the PSTN line.
> Upgrade your firmware to the latest release. They solved that problem in 
> the more recent releases (2.0.10 and above, IIRC).

or, if they have a sense of humor, tell them the equally unprofessional
cisco 1750 does the same

randy