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Micro House PC Hardware Library Volume II: Network Interface Cards And Modems Micro House PC Hardware Library Volume II: Network Interface Cards And Modems
by Micro House International, Inc. and Scott Mueller
Que, Macmillan Computer Publishing
ISBN: 078971664x   Pub Date: 06/17/98
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SUPPORTED STANDARD COMMANDS
Basic AT Commands
+++, ‘comma’, A/
A, E, H, L, M, N, O, Q, V, Z
&C, &D, &F, &G, &K, &Q, &S, &T, &V, &W, &Z
Extended AT Commands
\G, \J, \N, \Q, \V, \X
%C
S-Registers
S0, S1, S2, S3, S4, S5, S6, S7, S8, S10, S11, S30, S36, S48

IS-101 COMMANDS
Note: The functions of the IS-101 commands are unidentified.

Proprietary AT Command Set

DIAL
Type: Immediate
Format: AT [cmds] D<#>;[cmds]
Description: Dials the telephone number indicated according to any modifiers included in the string.
Command Function
DL Re-dial last number.
DP Pulse dialing enabled.
DS=n Dial stored telephone number n.
DT Tone dialing enabled.
DV Dial the number specified in speakerphone mode.
DW Dialing resumed following dial tone detection.
D, Dialing paused for amount of time specified in S8 register.
D! Flash function initiated. Modem commanded to go off-hook for specified time before returning on-hook.
D@ Wait for Quiet Answer function enabled. Modem waits until a “quiet answer,” a ring-back signal followed by silence up to the time specified in S7, is received prior to executing the rest of the dial string.
D$ Wait for prompt tone detection function enabled. Waits for prompt tone for amount of time specified by the S7 command.
D^ Calling tone disabled for this call.
D; Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command.

DISPLAY BLACKLIST NUMBERS
Type: Immediate
Format: AT [cmds] %B [cmds]
Description: Displays the list of all the numbers on the blacklist. Returns ERROR if blacklisting is disabled.

DISPLAY INFORMATION
Type: Immediate
Format: AT [cmds] In [cmds]
Description: Displays information requested about the modem.
Command Function
I0 Displays default speed and firmware revision.
I1 Displays ROM checksum.
I2 Tests and displays ROM checksum result.
I3 Displays default speed and firmware revision.
I4 Displays data pump version.
I9 Displays country code.

MAXIMUM LINE SPEED
Type: Register
Format: AT [cmds] S37=n [cmds]
Description: Sets the maximum speed the modem will attempt to connect at.
Command Function
S37=0No maximum speed.
     S37=2 Maximum connect speed set to 1200/75bps.
     S37=3 Maximum connect speed set to 300bps.
     S37=5 Maximum connect speed set to 1200bps.
     S37=6 Maximum connect speed set to 2400bps.
     S37=7 Maximum connect speed set to 4800bps.
     S3=8 Maximum connect speed set to 7200bps.
     S37=9 Maximum connect speed set to 9600bps.
     S37=10 Maximum connect speed set to 12Kbps.
     S37=11 Maximum connect speed set to 14.4Kbps.
     S37=12 Maximum connect speed set to 16.8Kbps.
     S37=13 Maximum connect speed set to 19.2Kbps.
     S37=14 Maximum connect speed set to 21.6Kbps.
     S37=15 Maximum connect speed set to 24Kbps.
     S37=16 Maximum connect speed set to 26.4Kbps.
     S37=17 Maximum connect speed set to 28.8Kbps.
     S37=18 Maximum connect speed set to 31.2Kbps.
     S37=19 Maximum connect speed set to 33.6Kbps.

ON-LINE
Type: Immediate
Format: AT [cmds] On
Description: Instructs the modem to return to on-line state.
Command Function
00 Return to on-line state.
01 Return to on-line state and initiate retrain sequence.
03 Return to on-line state and initiate renegotiation sequence.

PROTOCOL/SPEED
Type: Configuration
Format: AT [cmds] Bn [cmds]
Description: Selects the communication protocol the modem will use.
Command Protocol
B0 Modem will use ITU-T V.22 at 1200bps.
B1 Modem will use Bell 212A at 1200bps.
B2 Modem will use ITU-T V.23 at 1200/75bps.
B3 Modem will use ITU-T V.23 at 75/1200bps.
B15 Modem will use ITU-T V.21 at 300bps.
B16 Modem will use Bell 103J at 300bps.


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