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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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CONNECTION SPEED UPPER LIMIT
Type: Configuration
Format: AT [cmds] &Nn [cmds]
Description: Sets required connection speed if &U is set to 0; otherwise, sets fastest allowed connection speed.
Command Function
&N0 No maximum connect speed.
&N1 Set maximum connect speed to 300bps.
&N2 Set maximum connect speed to 1200bps.
&N3 Set maximum connect speed to 2400bps.
&N4 Set maximum connect speed to 4800bps.
&N5 Set maximum connect speed to 7200bps.
&N6 Set maximum connect speed to 9600bps.
&N7 Set maximum connect speed to 12Kbps.
&N8 Set maximum connect speed to 14.4Kbps.
&N9 Set maximum connect speed to 16.8Kbps.
&N10 Set maximum connect speed to 19.2Kbps.
&N11 Set maximum connect speed to 21.6Kbps.
&N12 Set maximum connect speed to 24Kbps.
&N13 Set maximum connect speed to 26.4Kbps.
&N14 Set maximum connect speed to 28.8Kbps.
&N15 Set maximum connect speed to 31.2Kbps.
&N16 Set maximum connect speed to 33.6Kbps.
&N17 Set maximum connect speed to 33.3Kbps.
&N18 Set maximum connect speed to 37.3Kbps.
&N19 Set maximum connect speed to 41.3Kbps.
&N20 Set maximum connect speed to 42.6Kbps.
&N21 Set maximum connect speed to 44Kbps.
&N22 Set maximum connect speed to 45.3Kbps.
&N23 Set maximum connect speed to 46.6Kbps.
&N24 Set maximum connect speed to 48Kbps.
&N25 Set maximum connect speed to 49.3Kbps.
&N26 Set maximum connect speed to 50.6Kbps.
&N27 Set maximum connect speed to 52Kbps.
&N28 Set maximum connect speed to 53.3Kbps.
&N29 Set maximum connect speed to 54.6Kbps.
&N30 Set maximum connect speed to 56Kbps.
&N31 Set maximum connect speed to 57.3Kbps.

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.
DR Answer mode enabled; originate mode disabled following handshake initiation.
DSn 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/ Dialing paused for 1/8 second.
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; Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command.

DISPLAY HELP SCREEN - AMPERSAND
Type: Configuration
Format: AT [cmds] &$ [cmds]
Description: Displays the help screen on the AT& commands.

DISPLAY HELP SCREEN - BASIC
Type: Configuration
Format: AT [cmds] $ [cmds]
Description: Displays the basic help screen.

DISPLAY HELP SCREEN - DIAL
Type: Configuration
Format: AT [cmds] D$ [cmds]
Description: Displays the help screen on the dialing commands.

DISPLAY HELP SCREEN – REGISTERS
Type: Configuration
Format: AT [cmds] S$ [cmds]
Description: Displays the help screen for S registers.

DISPLAY INFORMATION
Type: Immediate
Format: AT [cmds] In [cmds]
Description: Displays modem properties.
Command Function
I0 Displays product identification code.
I1 Tests and displays ROM checksum result.
I2 Tests and displays RAM checksum result.
I3 Displays product identification.
I4 Displays current command settings.
I5 Displays current NVRAM settings.
I6 Displays current connection’s statistics.
I7 Displays product configuration.

ERROR CORRECTION MODE
Type: Configuration
Format: AT [cmds] &Mn [cmds]
Description: Selects active error correction protocols.
Command Function
     &M0 Normal mode only.
&M4Auto-detect mode.
     &M5 Error correction mode only.


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