Start by ensuring the DIP switches are in a good starting configuration. The factory defaults need to be slightly modified: From switch one: OFF, OFF, ON, ON(*), OFF(*), OFF, OFF, ON, ON(*), OFF. The marked (*) settings differ from the factory. Switch 4 ON disables command echo, prevents feedback. Switch 5 OFF enables answering calls. Switch 9 ON enables command mode after +++.
Note that the modem will communicate at a fixed speed with the Annex terminal server for all calls, and this speed is determined as the speed the modem's RS-232 serial port was running at when the AT&W command was given. Therefore, be certain that the serial line you use to configure the modem is running at the same speed as the fixed speed of the Annex port. For the older Annex terminal servers (such as at ARL b328-1), the fixed speed is 38400. For newer Annex terminal servers (such as at GSI) this speed is 57600.
After connecting to the computer, enter "AT", and ensure that the modem is alive, with an OK response.
at&f1 Recall factory configuration #1 att touch-tone dialing atm0 speaker turned off ats0=1 allow answer ats32=6 voice/data button resets modem
These notable settings are included in the f1 defaults.
atx7 extended result codes (f1 default) at&a3 Full protocol codes (f1 default) at&h1 Hardware flow control (f1 default) at&k1 compression enabled (f1 default)
A convenient cut-n-paste version:
at&f1 t m0 s0=1 s32=6 &w OK ati4 USRobotics Courier V.Everything Settings... B0 C1 E1 F1 M0 Q0 V1 X7 BAUD=38400 PARITY=N WORDLEN=8 DIAL=HUNT ON HOOK TIMER &A3 &B1 &C1 &D2 &G0 &H1 &I0 &K1 &L0 &M4 &N0 &P0 &R2 &S0 &T5 &X0 &Y1 %N6 S00=000 S01=000 S02=043 S03=013 S04=010 S05=008 S06=002 S07=060 S08=002 S09=006 S10=007 S11=070 S12=050 S13=000 S14=001 S15=000 S16=000 S17=000 S18=000 S19=000 S20=000 S21=010 S22=017 S23=019 S24=150 S25=005 S26=001 S27=000 S28=008 S29=020 S30=000 S31=000 S32=006 S33=000 S34=000 S35=000 S36=000 S37=000 S38=000 S39=000 S40=000 S41=000 S42=126 S43=200 S44=015 S45=000 S46=000 S47=000 S48=000 S49=000 S50=000 S51=000 S52=000 S53=000 S54=064 S55=000 S56=000 S57=000 LAST DIALED #: OK