for -21db set 1-6 up, 7&8 fixed down

Switch 11

Switch 1 up (AT&T spec) down for ITU No. 5 - probably not for U.S./Canada

Switch 2 up for Rotary Pulse timer less than 10ms. down for more than 20 ms if you have a really slow C.O.

Switch 3 - fixed to off

Switch 4 - Down (Up for MFR (E-911 trunks), down for Touch Tone(R)) Affects registers 0,1,2,3

Switch 5 - Down Same as switch 4, but affects registers 4,5,6,7

Switch 6 - Up - DPR Receive for North America; Down for Down Under (Australia)

Switch 7 - Off - Fixed

Switch 8 - Off - Fixed