Specifications

Si2457/34/15/04
Rev. 1.3 23
H0
Go on-hook (hang up modem).
H1
Go off-hook.
In
Identification and checksum.
I0
Display Si2457/34/15/04 revision code.
B: Revision B
C: Revision C, etc.
I1
Display Si2457/34/15/04 firmware revision code (numeric).
I3
Display line-side revision code.
18C = Si3018 revision C
I6
Display the ISOmodem
®
model number.
“2404” = Si2404
“2415” = Si2415
“2434” = Si2434
“2457” = Si2457
I7
Diagnostic results 1. See “AN93: ISOModem
®
Chipset Family Designer’s Guide” for details.
I8
Diagnostic results 2. See AN93 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 12 on page 38)
Q1
Disable result codes (enable quiet mode).
R
Initiate V.23 reversal.
Sn
S-register operation (see Table 13 on page 41).
S$
List contents of all S registers.
Sn?
Display contents of S-register n.
Table 8. Basic AT Command Set (Command Defaults in Bold) (Continued)
Command Action