These are register settings of the Telebit WorldBlazer modem that I have found useful for a dial-out-only modem setup on Solaris 2.x and SunOS 4.1.3+.
This is the setup I often use for this modem in fixed-DTE speed (Sun-to-modem) dial-out-only applications.
WorldBlazer - SA - Version LA5.01 - Active Configuration B1 E1 L1 M0 Q2 T V0 X0 Y0 &C1 &D3 &G0 &J0 &L0 &Q0 &R3 &S4 &T4 &X0 S000=0 S001=0 S002=43 S003=13 S004=10 S005=8 S006=2 S007:90 S008=2 S009=6 S010=14 S011=70 S012:255 S018=0 S025=5 S026=1 S038=0 S041:1 S045=0 S046=0 S047=4 S048=0 S050=0 S051:253 S056=17 S057=19 S058:2 S059:15 S060=0 S061:0 S062=15 S063=0 S064:1 S068=255 S069=0 S090=0 S092:1 S093=8 S094=1 S100=0 S104=0 S105=1 S111:30 S112=1 S151=4 S155=0 S180=2 S181=1 S183=25 S190=1 S191:6 S253=10 S254=1 S255=255