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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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SUPPORTED STANDARD COMMANDS
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Basic AT Commands
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+++, comma, A/
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A, E, H, L, M, N, O, Q, V, Z
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&C, &D, &F, &G, &K, &Q, &S, &T, &V, &W, &Z
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Extended AT Commands
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\G, \J, \N, \Q, \V, \X
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%C
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S-Registers
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S0, S1, S2, S3, S4, S5, S6, S7, S8, S10, S11, S30, S36, S48
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IS-101 COMMANDS
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Note: The functions of the IS-101 commands are 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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DV
| Dial the number specified in speakerphone mode.
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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$
| 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^
| Calling tone disabled for this call.
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D;
| Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command.
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DISPLAY BLACKLIST NUMBERS
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Type:
| Immediate
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Format:
| AT [cmds] %B [cmds]
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Description:
| Displays the list of all the numbers on the blacklist. Returns ERROR if blacklisting is disabled.
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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 default speed and firmware revision.
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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 default speed and firmware revision.
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I4
| Displays data pump version.
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I9
| Displays country code.
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MAXIMUM 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 speed the modem will attempt to connect at.
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Command
| Function
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S37=0 | No maximum speed.
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S37=2
| Maximum connect speed set to 1200/75bps.
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S37=3
| Maximum connect speed set to 300bps.
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S37=5
| Maximum connect speed set to 1200bps.
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S37=6
| Maximum connect speed set to 2400bps.
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S37=7
| Maximum connect speed set to 4800bps.
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S3=8
| Maximum connect speed set to 7200bps.
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S37=9
| Maximum connect speed set to 9600bps.
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S37=10
| Maximum connect speed set to 12Kbps.
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S37=11
| Maximum connect speed set to 14.4Kbps.
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S37=12
| Maximum connect speed set to 16.8Kbps.
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S37=13
| Maximum connect speed set to 19.2Kbps.
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S37=14
| Maximum connect speed set to 21.6Kbps.
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S37=15
| Maximum connect speed set to 24Kbps.
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S37=16
| Maximum connect speed set to 26.4Kbps.
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S37=17
| Maximum connect speed set to 28.8Kbps.
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S37=18
| Maximum connect speed set to 31.2Kbps.
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S37=19
| Maximum connect speed set to 33.6Kbps.
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ON-LINE
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Type:
| Immediate
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Format:
| AT [cmds] On
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Description:
| Instructs the modem to return to on-line state.
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Command
| Function
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00
| Return to on-line state.
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01
| Return to on-line state and initiate retrain sequence.
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03
| Return to on-line state and initiate renegotiation sequence.
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PROTOCOL/SPEED
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Type:
| Configuration
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Format:
| AT [cmds] Bn [cmds]
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Description:
| Selects the communication protocol the modem will use.
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Command
| Protocol
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B0
| Modem will use ITU-T V.22 at 1200bps.
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B1
| Modem will use Bell 212A at 1200bps.
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B2
| Modem will use ITU-T V.23 at 1200/75bps.
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B3
| Modem will use ITU-T V.23 at 75/1200bps.
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B15
| Modem will use ITU-T V.21 at 300bps.
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B16
| Modem will use Bell 103J at 300bps.
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