I have had some time to do some more testing.
It seems that after connecting a call through
Voip.Ms OR GoogleVoice, no touchtones are passed.
I reset both LINE and IP PHONE-phone settings to Obitalk settings, just in case.
Googlevoice and CircleNet both appear to have no audio once connected. I have not tried other setting for those two.
I took
Voip.Ms and configigured SP3 settings:
Set for AUTO, no tone.
Set for INBAND, no tone.
Set for RFC2833, no tone.
Set for SipInfo, no tone.
Set for SIP and RFC2833, no tone.
It does not matter if I use hands-free dialing or list the phone.
I am pressing the LINE buttons and see that the caller-id differs, so that seems to show I am getting different SP's.
So I can dial out but can't get any audio after the call answers.
I also caled INTO the phone and connected. I then pressed touchtones on the phone but did not hear any tones. Thus on a connected call, whether incoming or outgoing, no tones are passed.
So as far as I can tell, it doesn't matter which SP I use, after a call completes, no tones are passed.
That leads me to a PHONE or LINE setting or firmware glitch.