voice: Zyxel 1496 E+, problems with welcome-message

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Michael Witschke <michael.witschke@mail.whm.tu-harburg.de> wrote:
> I have a problem with my Zyxel 1496 E+ (ROM Ver. 6.17). I recorded 
> a wav-file with my welcome-message and converted it through pvf-tools
> to ZyXEL 4-bit ADPCM. (It was recorded at 22050 Hz and converted by
> sox to 9600 Hz)

To my knowledge, ZyXEL 1496 can only record at 2 bit APCM, 9600 Hz.

So, the best you can do is to convert at 4 bit, 9600 Hz. What happens
if you do that ?