NEC Versa 2200C Series Manual page 82

AT COMMANDS
COMMAND DESCRIPTION
I, I0 Display 14,400 (Identification code).
I1 Return actual checksum on ROM.
I2 Return OK/ERROR on RAM checksum.
I3 Display firmware revision.
I4 Display configuration settings.
L0, L1 Low speaker volume.
Medium speaker volume.
L2
L3 High speaker volume.
M, M0 Turn speaker off.
Turn speaker on until Carrier Detect (CD).
M1
M2 Set speaker to always on.
M3 Turn speaker on until CD except during dialing.
N0 Force line speed set by S37 register.
When originating, auto line speed starting with
N1
speed set in S37 register.
O, O0 Return to Online Data mode from Online
Command mode.
O1 Go online and initiate retrain.
Display result codes (Quiet disabled).
Q, Q0
Q1 Do not display result codes (Quiet enabled).
Q2 No call progress messages in answer mode.
S r =n Set S register r to value n .
S r ? Show value in S register r.
V, V0 Display numeric result codes (Verbose disabled).
V1 Display full-word result codes (Verbose enabled).
Modem Commands, Registers, and Codes C-3