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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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INTERRUPT SELECTION
Setting SW1/A SW1/B SW1/C SW1/D SW1/E SW1/F SW1/G SW1/H SW1/I
2/9 Open Open Open Open Closed Open Open Open Open
3 Open Open Open Open Open Open Open Open Closed
4 Open Open Open Open Open Open Open Closed Open
5 Open Open Open Open Open Open Closed Open Open
7 Open Open Open Open Open Closed Open Open Open
10 Open Open Open Closed Open Open Open Open Open
11 Open Open Closed Open Open Open Open Open Open
12 Open Closed Open Open Open Open Open Open Open
15 Closed Open Open Open Open Open Open Open Open

SERIAL PORT ADDRESS SELECTION
Setting SW2
3F8h (COM1:) Pins 1 & 2, 3 & 4 closed
2F8h (COM2:) Pins 3 & 4 closed
3E8h (COM3:) Pins 1 & 2 closed
2E8h (COM4:) Open

SUPPORTED STANDARD COMMANDS
Basic AT Commands
+++, ‘comma’, A/
A, B, E, H, L, M, N, O, P, Q, T, V, W, X, Y, Z
&C, &D, &F, &G, &K, &P, &Q, &R, &S, &T, &V, &W, &Y, &Z
Extended AT Commands
\A, \B, \K, \N
%C, %E, %L, %Q
Special AT Commands
+MS
S-Registers
S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S14, S16, S18, S21, S22, S23, S25, S26
S27, S29, S30, S31, S32, S33, S36, S38, S46, S48, S82, S86, S95

UNIDENTIFIED COMMANDS
Command Default
S39 Unidentified
S40 Unidentified
S41 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.
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^ Calling tone enabled for this call.
D& Wait for prompt tone detection function enabled. Waits for prompt tone for amount of time specified by the S7 command.
D; returned to idle state after dialing. The semicolon can only be placed at the end of the dial command.

DISPLAY INFORMATION
Type: Immediate
Format: AT [cmds] In [cmds]
Description: Displays information requested about the modem.
Command Function
I0 Displays product identification code.
I1 Displays ROM checksum.
I2 Tests and displays ROM checksum result.
I3 Displays firmware revision.
I6 Displays data pump model and revision.

LINE SPEED
Type: Register
Format: AT [cmds] S37=n [cmds]
Description: Sets the maximum allowable data exchange rate attempted during the handshaking process.
Command Function
S37=0Attempt to connect at fastest common speed.
     S37=1 Set speed to 300bps.
     S37=2 Set speed to 300bps.
     S37=3 Set speed to 300bps.
     S37=5 Set speed to 1200bps.
     S37=6 Set speed to 2400bps.
     S37=7 Attempt to connect with V.23.
     S37=8 Set speed to 4800bps.
     S37=9 Set speed to 9600bps.
     S37=10 Set speed to 12Kbps.
     S37=11 Set speed to 14.4Kbps.
     S37=12 Set speed to 7200bps.


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