B-10 APPENDIX B: AT COMMANDS, REGISTERS, AND RESULT CODES
Digital Modem Result Codes

Table B-4 lists the 3Com Impact digital modem result codes.

Table B-4 3Com Impact Digital Modem Result Codes
Short Form Long Form Meaning
0 OK Indicates that the most recent command or
action was successfully completed.
2 RING Indicates that an incoming call is present
and no AT Answer command is
outstanding.
3 NO CARRIER Indicates that the most recent call attempts
did not establish a call or that the physical
ISDN interface is not operational.
4 ERROR Indicates that the most recent command or
action was not successfully completed.
7 BUSY Indicates that the most recent call attempt
did not connect because the remote
destination was busy.
5 CONNECT 1200 Indicates 1200 bps analog modem
connection.
10 CONNECT 2400 Indicates 2400 bps analog modem
connection.
11 CONNECT 4800 Indicates 4800 bps analog modem
connection.
12 CONNECT 9600 Indicates 9600 bps analog modem
connection.
15 CONNECT 14400 Indicates 14400 bps analog modem
connection.
28 CONNECT 28800 Indicates 28800 bps analog modem
connection.
56 CONNECT 56000 Indicates 56000 bps digital modem
connection.
64 CONNECT 64000 Indicates 64000 bps digital modem
connection.