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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
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Setting
| SW1/A
| SW1/B
| SW1/C
| SW1/D
| SW1/E
| SW1/F
| SW1/G
| SW1/H
| SW1/I
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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
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SERIAL PORT ADDRESS SELECTION
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Setting
| SW2
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3F8h (COM1:)
| Pins 1 & 2, 3 & 4 closed
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2F8h (COM2:)
| Pins 3 & 4 closed
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3E8h (COM3:)
| Pins 1 & 2 closed
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2E8h (COM4:)
| Open
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SUPPORTED STANDARD COMMANDS
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Basic AT Commands
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+++, comma, A/
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A, B, E, H, L, M, N, O, P, Q, T, V, W, X, Y, Z
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&C, &D, &F, &G, &K, &P, &Q, &R, &S, &T, &V, &W, &Y, &Z
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Extended AT Commands
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\A, \B, \K, \N
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%C, %E, %L, %Q
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Special AT Commands
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+MS
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S-Registers
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S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S14, S16, S18, S21, S22, S23, S25, S26
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S27, S29, S30, S31, S32, S33, S36, S38, S46, S48, S82, S86, S95
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UNIDENTIFIED COMMANDS
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Command
| Default
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S39
| Unidentified
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S40
| Unidentified
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S41
| Unidentified
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Proprietary AT Command Set
DIAL
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Type:
| Immediate
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Format:
| AT [cmds] D<#>;[cmds]
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Description:
| Dials the telephone number indicated according to any modifiers included in the string.
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Command
| Function
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DL
| Re-dial last number.
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DP
| Pulse dialing enabled.
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DS=n
| Dial stored telephone number n.
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DT
| Tone dialing enabled.
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DW
| Dialing resumed following dial tone detection.
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D,
| Dialing paused for amount of time specified in S8 register.
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D!
| Flash function initiated. Modem commanded to go off-hook for specified time before returning on-hook.
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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.
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D^
| Calling tone enabled for this call.
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D&
| Wait for prompt tone detection function enabled. Waits for prompt tone for amount of time specified by the S7 command.
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D;
| returned to idle state after dialing. The semicolon can only be placed at the end of the dial command.
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DISPLAY INFORMATION
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Type:
| Immediate
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Format:
| AT [cmds] In [cmds]
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Description:
| Displays information requested about the modem.
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Command
| Function
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I0
| Displays product identification code.
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I1
| Displays ROM checksum.
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I2
| Tests and displays ROM checksum result.
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I3
| Displays firmware revision.
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I6
| Displays data pump model and revision.
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LINE SPEED
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Type:
| Register
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Format:
| AT [cmds] S37=n [cmds]
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Description:
| Sets the maximum allowable data exchange rate attempted during the handshaking process.
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Command
| Function
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S37=0 | Attempt to connect at fastest common speed.
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S37=1
| Set speed to 300bps.
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S37=2
| Set speed to 300bps.
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S37=3
| Set speed to 300bps.
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S37=5
| Set speed to 1200bps.
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S37=6
| Set speed to 2400bps.
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S37=7
| Attempt to connect with V.23.
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S37=8
| Set speed to 4800bps.
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S37=9
| Set speed to 9600bps.
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S37=10
| Set speed to 12Kbps.
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S37=11
| Set speed to 14.4Kbps.
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S37=12
| Set speed to 7200bps.
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