We were trying to turn the speaker volume down during a Page (its on 00 of 12) yes.

We changed the "DKT-HF, DKT-HF (0-63)" value as advised by tech support, to decrease the Page volume to the speaker, it did not.
We have analog CO lines, didn't test them on speaker.

So neither DTT-HF or DKT-HS will lower page volume to phone speakers? The phone's volume control does provide a medium(00) to high volume(12) control, but users want the volume control(on page) greatly reduced to a whisper if the want. Its quite loud set at 00.

We (HEB tech support and I) looked for the 'turn off warning tone' but all we could find as I recall was a table with tone frequency, durations, times, etc. When I set the tone duration or frequency to '0' we lost audio output to the external amplifier or something silly unrelated. I'll look in system attributes for the pw tone off next time I'm on site.

My plan B is Black Gaffers Tape (matches phone color and texture) but I hoped I wouldn't have to go there...