Specifications

Si2404
Rev. 0.91 19
En Local DTE echo
E0 Disable
E1 Enable
Hn Hook switch.
H0 Go on-hook (hang up modem).
H1 Go off-hook.
In Identification and checksum.
I0 Display Si2404 revision code.
B: Revision B
C: Revision C, etc.
I1 Display Si2404 firmware revision code (numeric).
I3 Display line-side revision code.
10C = Si3010 revision C
I6 Display the ISOmodem® model number.
“2404” = Si2404
I7 Diagnostic results 1. See “AN93: Modem Designer’s Guide” for details.
I8 Diagnostic results 2. See “AN93: Modem Designer’s Guide” for details.
Ln Speaker volume operation
L1 Low speaker volume
L2 Medium speaker volume
L3 High speaker volume
Mn Speaker operation (via AOUT).
M0 Speaker is always off.
M1 Speaker is on while dialing and handshaking; off in data mode.
M2 Speaker is always on.
M3 Speaker is off while dialing, on during handshaking and retraining.
On Return to data mode from Command mode operation.
O0 Return to data mode.
O1 Return to data mode and perform a full retrain (at any speed except 300 bps).
O2 Return to data mode and perform rate renegotiation.
Qn Response mode.
Q0 Enable result codes (see Table 13 on page 32)
Q1 Disable result codes (enable quiet mode).
R Initiate V.23 reversal.
Sn S-register operation (see Table 14 on page 34).
Table 9. Basic AT Command Set (Command Defaults in Bold) (Continued)
Command Action