I have the same problem with a HandyTone 502 adapter.

Anyone got any hints to get the flash button to work?

On Wed, Dec 9, 2009 at 11:25 AM, Jonas Gauffin <jonas.gauffin@gmail.com> wrote:
Hello,

I can't get call transfer to work with a SPA2102 adapter.
I don't think it has something to do with FS, but I'm hoping someone here could help me.
I do not get a new line in the phone (by pressing the R button), all DTMF tones are sent as audio to the other connected phone.

Anyone got it working?

Thanks,
  Jonas