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C288MX PCMCIA
E-TECH RESEARCH, INC.
C288MX PCMCIA
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Card Type
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Modem (asynchronous)
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Chipset
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Unidentified
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Maximum Data Rate
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28.8Kbps
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Maximum Fax Rate
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14.4Kbps
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Data Bus
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PCMCIA Type II
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Fax Class
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Class I & II
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Data Modulation
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Bell 103A/212A
ITU-T V.21, V.22, V.22bis, V.32, V.32bis, V.34
AT&T V.32terbo
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Fax Modulation
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ITU-T V.17, V.21CH2, V.27ter, V.29
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Error Correction/Compression
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MNP5, V.42, V.42bis
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53134
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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, D, E, H, L, M, N, P, Q, T, V, W, X, Y, Z
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&C, &D, &F, &G, &K, &L, &R, &S, &T, &V, &W, &Y, &Z
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Extended AT Commands
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\A, \B, \C, \G, \J, \K, \N, \Q, \T, \V, \X
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%A, %C, %G
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Special AT Commands
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"H, -J, "N, "O
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S-Registers
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S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S18, S22, S25, S26, S27, S30
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Note: See MHI documentation for complete information.
The functions of the O command and the S42 and S47 registers are unidentified.
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UNIDENTIFIED COMMANDS
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Command
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Default
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O
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N/A
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S42
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Read-only
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Proprietary AT Command Set
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AUTO-RELIABLE FALLBACK CHARACTER
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Type:
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Register
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Format:
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AT [cmds] S43=n [cmds]
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Default:
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Read-only
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Range:
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0-127
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Unit:
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ASCII
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Description:
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Displays the ASCII value character used as the auto-reliable fallback character.
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AUTO-RELIABLE TIME BUFFER CONFIGURATION
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Type:
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Register (read-only)
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Format:
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AT [cmds] S48? [cmds]
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Description:
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Displays information regarding the handling of incoming data during auto-reliable time period.
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Value
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Meaning
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0
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Data is discarded.
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1
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Data is buffered for 4 seconds or 200 characters.
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2
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Data is discarded; modem returns to normal mode on receiving auto-reliable fallback character.
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BIT-MAPPED REGISTER S44
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Format:
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AT [cmds] S44=n [cmds]
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Default:
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6
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Range:
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0 - 23
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Description:
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Controls V.42bis and auto-fallback/fall-forward.
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Bit
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Value
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Function
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0
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í 0
1
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V.42bis enabled.
V.42bis disabled.
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2, 1
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00
01
10
í 11
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V.42bis disabled.
V.42bis enabled on transmit only.
V.42bis enabled on receive only.
V.42bis enabled.
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3
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0
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Not used.
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4
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í 0
1
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Auto-fallback/fall-forward disabled.
Auto-fallback/fall-forward enabled.
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BIT-MAPPED REGISTER S51
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Format:
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AT [cmds] S51? [cmds]
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Default:
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Read-only
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Range:
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0 - 115
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Description:
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Controls flow control, serial port speed, and XON/XOFF trapping.
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Bit
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Value
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Function
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1, 0
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00
01
10
11
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Flow control disabled.
Bidirectional XON/XOFF flow control enabled.
CTS flow control by DCE enabled.
Bidirectional RTS/CTS flow control enabled.
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3, 2
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00
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Not used.
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4
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0
1
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Modem-to-modem flow control disabled.
Modem-to-modem flow control enabled.
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5
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0
1
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Serial port speed locked.
Serial port speed follows connect speed.
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6
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0
1
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XON/XOFF signals trapped by local modem.
XON/XOFF passed through local modem.
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BIT-MAPPED REGISTER S54
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Format:
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AT [cmds] S54=n [cmds]
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Default:
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Unidentified
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Range:
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Unidentified
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Description:
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Controls extended result codes.
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Bit
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Value
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Function
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1 - 0
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N/A
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This function is unidentified.
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6 - 2
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00000
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Not used.
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7
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0
1
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Error correction and compression extended result codes disabled.
Error correction extended result codes enabled.
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BREAK TYPE
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Type:
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Register (read-only)
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Format:
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AT [cmds] S52? [cmds]
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Description:
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Returns a number indicating the modem’s action on a break signal.
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Value
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Break from DTE
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Modem receives \B
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Break received from remote modem
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0
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Online command mode enabled, send no break to remote modem.
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Break sent to remote modem and buffered cleared.
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Buffers cleared, break sent to DTE.
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1
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Break sent to remote modem and buffered cleared.
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Break sent to remote modem and buffered cleared.
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Buffers cleared, break sent to DTE.
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2
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Online command mode enabled, send no break to remote modem.
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Send break to remote modem immediately.
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Break sent immediately to DTE.
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3
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Send break to remote modem immediately.
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Send break to remote modem immediately.
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Break sent immediately to DTE.
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4
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Online command mode enabled, send no break to remote modem.
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Send break with transmitted data.
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Break sent with received data to the DTE.
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5
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Send break with transmitted data.
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Send break with transmitted data.
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Break sent with received data to the DTE.
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CONNECT MODE
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Type:
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Register, read-only
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Format:
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AT [cmds] S53? [cmds]
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Description:
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Returns a value indicating the type of connection the modem will make.
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Value
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Meaning
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0
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Normal mode enabled
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1
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Direct mode enabled
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2
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MNP reliable mode enabled
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3
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Auto-reliable mode or MNP auto-reliable mode enabled
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4
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V.42 auto-reliable mode or MNP auto-reliable mode enabled
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5
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V.42 reliable mode enabled
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DISPLAY INFORMATION
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Type:
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Immediate
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Format:
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AT [cmds] In [cmds]
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Description:
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Displays information requested about the modem.
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Command
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Function
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I0
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Displays product identification code.
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I1
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Displays country code.
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I2
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Displays OEM string.
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I4
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Displays EPROM type.
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I5
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Displays DSP chip version.
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I9
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Displays flash ROM checksum.
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EXTENDED RESULT CODES
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Type:
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Register
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Format:
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AT [cmds] S41? [cmds]
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Description:
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Displays selection of which extended result codes will be displayed.
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Value
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Meaning
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0
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Enables CONNECT result codes to report DTE speed. If S95=0, then all extended connection result codes are disabled.
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1
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Enables CONNECT result codes to report DTE speed. If S95=0, then all CARRIER and PROTOCOL extended result codes are enabled.
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2
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Enables CONNECT result codes to report DCE speed. If S95=0, then all extended result codes are disabled.
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HDLC ADDRESS
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Type:
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Register
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Format:
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AT [cmds] S20=n [cmds]
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Default:
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0
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Range:
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0-255
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Unit:
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1 ASCII character
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Description:
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Sets the HDLC address and BSC character.
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LINE SPEED
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Type:
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Register (read-only)
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Format
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AT [cmds] S37? [cmds]
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Description:
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Displays the maximum allowable data exchange rate attempted during handshake process.
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Command
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Function
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í S37=0
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Speed of last command.
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S37=3
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Connect at 300bps.
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S37=5
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Connect at 1200bps.
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S37=6
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Connect at 2400bps.
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S37=7
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Connect at 4800bps.
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S37=8
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Connect at 7200bps.
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S37=9
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Connect at 9600bps.
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S37=10
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Connect at 12Kbps.
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S37=11
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Connect at 14.4Kbps.
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S37=12
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Connect at 16.8Kbps.
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S37=13
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Connect at 19.2Kbps.
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S37=14
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Connect at 21.6Kbps.
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S37=15
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Connect at 24Kbps.
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S37=16
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Connect at 26.4Kbps.
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S37=17
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Connect at 28.8Kbps.
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LOCAL SERIAL PORT SPEED
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Type:
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Register (read-only)
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Format:
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AT [cmds] S62? [cmds]
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Description:
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Returns a value indicating the speed of the local serial port.
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Value
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Meaning
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0
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Serial port speed set to 300bps.
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1
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Serial port speed set to 600bps.
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2
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Serial port speed set to 1200bps.
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3
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Serial port speed set to 2400bps.
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4
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Serial port speed set to 4800bps.
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5
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Serial port speed set to 7200bps.
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6
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Serial port speed set to 9600bps.
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7
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Serial port speed set to 12Kbps.
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8
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Serial port speed set to 14.4Kbps.
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9
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Serial port speed set to 16.8Kbps.
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10
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Serial port speed set to 19.2Kbps.
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11
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Serial port speed set to 21.6Kbps.
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12
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Serial port speed set to 24Kbps.
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13
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Serial port speed set to 26.4Kbps.
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14
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Serial port speed set to 28.8Kbps.
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15
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Serial port speed set to 38.4Kbps.
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16
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Serial port speed set to 57.6Kbps.
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17
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Serial port speed set to 115.2Kbps.
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MAXIMUM BLOCK SIZE FOR TRANSMISSION
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Type:
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Register (read-only)
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Format:
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AT [cmds] S49? [cmds]
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Description:
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Displays the maximum transmittable block size in MNP mode.
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Value
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Meaning
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0
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MNP block size is 64 characters
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1
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MNP block size is 128 characters
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2
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MNP block size is 192 characters
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3
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MNP block size is 256 characters
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MNP MODE
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Type:
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Register
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Format:
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AT [cmds] S59=n [cmds]
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Description:
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Controls MNP mode.
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Command
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Function
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S59=0
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MNP5 compression disabled.
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í S59=1
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MNP5 compression enabled.
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MODE OF OPERATION
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Type:
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Register
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Format:
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AT [cmds] S50? [cmds]
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Description:
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Returns a value indicating the modem’s current operating mode.
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Value
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Meaning
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0
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Modem is in data mode.
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1
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Modem is in fax mode.
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ROUND TRIP DELAY
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Type:
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Register
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Format:
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AT [cmds] S65=n [cmds]
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Default:
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Read-only
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Range:
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Unidentified
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Unit:
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.1 second
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Description:
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The function of this register is unidentified.
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SLEEP TIMER
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Type:
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Register
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Format
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AT [cmds] S46=n [cmds]
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Default:
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255
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Range:
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0-255
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Unit:
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.1 second
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Description:
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Maximum duration of DTE and DCE inactivity allowed prior to initiating low-power sleep mode. Setting S46 to 255 disables this feature.
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SLEEP TIMER
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Type:
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Register
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Format
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AT [cmds] S47=n [cmds]
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Default:
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255
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Range:
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0-255
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Unit:
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Unidentified
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Description:
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Maximum duration of DTE and DCE inactivity allowed prior to initiating power-down sleep mode. Setting S47 to 255 disables this feature.
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V.42bis DICTIONARY SIZE
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Type:
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Register (read-only)
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Format:
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AT [cmds] S57? [cmds]
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Description:
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Returns a value indicating the V.42bis dictionary size.
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Value
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Meaning
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0
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512 byte dictionary selected.
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1
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1024 byte dictionary selected.
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2
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1536 byte dictionary selected.
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V.42bis MAXIMUM STRING LENGTH
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Type:
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Register
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Format:
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AT [cmds] S58=n [cmds]
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Default:
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32
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Range:
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6-64
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Unit:
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1 ASCII character
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Description:
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Sets the maximum string size for V.42bis compression.
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