Hi Clifton,
Interesting!  What ROM revision do you have ("ati3" will tell you)?  
What is the response to "ati92"?
CM>
MSGID: 1:124/5029@fidonet 599263da
CM>
PID: FM 2.12.SW UNREG
CM>
TZUTC: -0500
CM>
TID: FastEcho 1.45a 8404
CM> > Hi Reg,
CM> > RG>@MSGID: 1:153/290.0 31cd8008
CM> > RG>Question about distinctive ring.
CM> > RG>I have the 288i pnp, rom v1.300-07, bundled with faxtalk v2.10
CM> > RG>I obtained some info from the faxback service about setting the
CM> > RG>-sdr=n command to the string but this modem will not recognize
CM> > RG>it.  I keep getting error messages returned.
CM> > RG>please help.
CM> > RG>reg
CM> > You must not have received my prior correspondence.
CM> > Only the SupraFax
CM> > and SupraSonic modems support distinctive ring.  The
CM> > SupraExpress does
CM> > not support this feature.
CM> > Thanks,
CM> > Dean - Supra PC Tech. Support
CM>DANG dont tell MY ExPress that!
CM>I have -SDR=2 and it answers on ring 2 of my second line.. Been doing
CM>it for months!
CM>ati10
CM>OK
CM>ati10
CM>101,115,120,121,123,140,147,149,150,151,153,156,157,180,181,182,184
CM>SupraExpress 288i PnP
CM>101=Class 1 FAX           115=V.17 14.4Kbps FAX     120=World Wide
CM>support 121=V.23                  123=Blacklisting
CM>140=V.32bis 14.4Kbps data 147=V.FC 28.8Kbps data    149=V.FC 24.0Kbps
CM>data    150=Enhanced &F options 151=Enhanced rate control 153=V.34
CM>1528.8Kbps data    156=Distinctive Ring 7=RINGING response code
CM>180=16550 UART            181=SupraSMART UART 182=RHSI
CM>184=ISA Plug and Play
CM>hmmm option 156 I believe..
CM> > Replies are sent in the same manner as originally
CM> > contacted.  Please use ctrl-Q to inlcude entire
CM> > message thread with your reply. I can't remember them
CM> > all!
CM> > --- FLAME v1.1
CM> > CORP" (1:357/4)
CM>--- (!) :-)
Thanks, 
Dean - Supra PC Tech. Support
deanh@supra.com
Replies are sent in the same manner as originally contacted.  Please use 
ctrl-Q to inlcude entire message thread with your reply. I can't remember 
them all!
--- FLAME v1.1
---------------