It's been a while since I've had a chance to look at this because of a snafu with the phone company. I had a tech from Toshiba out today. According to the carrier, the attenuation was already as it should be, but we did disable v34 and JBIG as TheOwl suggested. The Toshiba tech, like ToshibaTech, did not find any code to force 9600 in the manual. But, perhaps that will not be necessary, because so far, everything works as it should!
Thanks to all who responded. Fingers crossed
m.