Campbell Scientific COM200 Telephone Modem - Manual (Page 18)

Appendix A. Modifying the Non-Volatile Memory
A- 4
COMMANDS TO CHANGE DEFAULT MODES:
B1 (default) CCITT V.32 (9600 baud), Bell 212A (1200 baud), and Bell
103 (300 baud)
B0 CCITT V.32 (9600 baud), CCITT V.22 (1200 baud), and
CCITT V.21 (300 baud)
S0=0 Disable Auto Answer
S0=1 Answer on first ring
S0=2 Answer on second ring
S0=X Answer on X th ring. (X is a number; maximum number = 4)
&F Restore factory defaults
&W0 Store current profile as Profile to load on power up
&V Display the current profile to the screen
RESULT CODES:
0 OK
1 Connect
2 Ring
3 No Carrier
4 Error
5 Connect 1200 Baud
6 No Dial Tone
7 Busy
8 No Answer
12 Connect 9600 Baud
13 Connect 9600/14400 Baud
17 Connect 9600 Baud
If more than four rings are specified, the datalogger may
time out before the modem answers; communication will
never be established! It is possible in some conditions to
allow more than four rings. Consult a Campbell Scientific
applications engineer about optimizing modem negotiations
before trying this and be sure to try the set up locally before
installing at a remote location. CAUTION