ACER, INC. 28.8 EXTERNAL MODEM Card Type Modem(synchronous/asynchronous), Fax Chip Set Unidentified Maximum Data Rate 28.8Kbps Maximum Fax Rate 14.4Kbps Data Bus External Fax Class Class I & II Data Modulation Protocol Bell 103A/212A ITU-T V.22, V.22bis, V.32, V.32bis, V.32terbo, V.34 Fax Modulation Protocol ITU-T V.17, V.21CH2, V.27ter, V.29 Error Correction/Compression MNP2-5, V.42, V.42bis [Image] CONNECTIONS Function Label Function Label Line in CN1 RS-232/422 CN3 Line out CN2 DC power CN4 DIAGNOSTIC LED(S) LED Status Condition MR On Power is on MR Off Power is off TR On DTR signal is high TR Off DTR signal is low SD On Modem transmitting data SD Off Modem not transmitting data RD On Modem receiving data RD Off Modem not receiving data OH On Modem is off-hook OH Off Modem is on-hook CD On Carrier signal detected CD Off Carrier signal not detected AA On Auto-answer enabled AA Off Auto-answer disabled EC On Error correction in progress EC Off Error correction inactive Proprietary AT Command Set AUTO ANSWER RING COUNT Type: Register Format: AT [cmds] S0=n [cmds] Unit: 1 ring Description: Sets the number of rings allowed before the modem automatically goes off-hook Note: If S0=0, automatic-answering is disabled. The A command must be used to go off-hook. Country Default Range Standard 0 0-255 France 0 0,2-3 Germany 0 0-5 Switzerland 0 0,2-9 Italy 0 0,2 Auto-reliable fallback character Type: Register Format AT [cmds] S29=n [cmds] Default: 0 Range: Unidentified Unit: Unidentified Description: The character used for fallback in auto-reliable mode Baud rate set selection Type: Configuration Format: AT [cmds] %Nn [cmds] Description: Sets the type of baud rates the modem uses Note: This command only functions in the external version Command Function %N0 Sets modem to IBM PC DTE baud rates %N1 Sets modem to NEC PC98 DTE baud rate set 1 %N2 Sets modem to NEC PC98 DTE baud rate set 2 BIT MAPPED REGISTERS Register Default S14 137 S15 83 S17 75 S19 3 S20 0 S21 48 S22 246 S23 12 S24 72 S27 0 S28 16 BLIND DIALING DELAY Type: Register Format AT [cmds] S6=n [cmds] Unit: 1 second Description: Duration of delay after modem goes off-hook and before dialing blindly during modes set by X0, X1 or X3 commands. Country Default Range Standard 2 2-255 United Kingdom 4 4-7 Switzerland 2 5-15 CARRIER LOSS RESPONSE TIME Type: Register Format AT [cmds] S10=n [cmds] Unit: .1 second Description: Maximum time allowed by the modem after losing the carrier signal and prior to initiating hang-up process. Country Default Range Standard 14 1-255 Germany 14 2-204 COMMUNICATIONS MODE Type: Configuration Format: AT [cmds] &Qn [cmds] Description: Selects communications mode options Command Mode &Q0 Asynchronous mode, serial port speed follows connect speed. &Q1 Asynchronous off-line command mode and synchronous connect mode. &Q2 If an off to on DTR transition occurs, modem automatically dials first number in directory, then activates synchronous connect mode. &Q3 Synchronous connect mode on high DTR. COMMUNICATION PROTOCOLS Type: Configuration Format: AT [cmds] Bn [cmds] Description: Selects the communication protocol for data calls Note: The B command allows the simultaneous selection of more than one suffix, enabling multiple protocols. Command Protocol B0 ITU-T V.22 at 1200bps or V.21 at 300 B1 Bell 212A at 1200bps or Bell 103 at 300 B2 In V.23 originate mode receive at 1200bps transmit at 75bps; in answer mode receive at 75bps transmit at 1200bps DIAL Type: Immediate Format: AT [cmds] D<#> [cmds] Description: Dials telephone number according to any modifiers included in the string Note: Any combination of modifiers can be used to produce the desired dial functions in sequence. Command Function DP Pulse dialing enabled DR Answer mode enabled; originate mode disabled following handshake initiation. DS=n Dial stored telephone number n (n= 0 to 3) DT Tone dialing enabled/Pulse dialing disabled DW Dialing resumed following dial tone detection D, Dialing paused for amount of time specified in S8 register D"WXY" Optional method of denoting telephone numbers. Letters enclosed in quotes are interpreted as numbers according to the system found on a telephone keypad. 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; Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command. D^ Enables calling tone for data modem dumb mode Type: Configuration Format: AT [cmds] %Dn [cmds] Description: Puts the modem into dumb mode Note: Used in situations where the modem’s microprocessor is not required, such as connection to a mainframe, leased line, or in synchronous mode Command Function %D0 Dumb mode disabled %D1 Dumb mode enabled INACTIVITY TIMER Type: Configuration Format: AT [cmds] \Tn [cmds] Default: 0 Range: 0-90 Unit: 1 minute Description: Sets the length of time that the modem does not receive information before it disconnects. INACTIVITY TIMER Type: Register Format AT [cmds] S30=n [cmds] Default: 0 Range: 0-90 Unit: 1 second Description: Maximum duration of DTE and DCE inactivity allowed prior to initiating hang-up process. Note: S30=0 disables the timer and allows indefinite inactivity. Modem connection speed Type: Configuration Format: AT [cmds] %Bn [cmds] Description: Sets the maximum connection speed Command Function %B300 300bps %B1200 1200bps %B2400 2400bps %B4800 4800bps %B7200 7200bps %B9600 9600bps %B12000 12.0Kbps %B14400 14.4Kbps %B16800 16.8Kbps %B19200 19.2Kbps %B21600 21.6Kbps %B24000 24.0Kbps %B26400 26.4Kbps %B28800 28.8Kbps NO CARRIER TIME-OUT Type: Register Format AT [cmds] S7=n [cmds] Unit: 1 second Description: Maximum time the modem waits after dialing to detect a carrier signal from the remote modem for both originating and answering calls. Note: W dial modifier also uses S7 to set the maximum time to wait. Country Default Range Standard 45 1-255 France 45 30-85 Germany 45 5-80 Switzerland 45 5-55 Italy 50 45-50 PULSE DIALING RATIO Type: Configuration Format: AT [cmds] &Pn [cmds] Description: Selects pulse dial make/break ratio Command Function &P0 33/67ms at 10pps (Europe) &P1 39/61ms at 10pps &P2 33/67ms at 20pps REPORT INFORMATION Type: Immediate Format: AT [cmds] In [cmds] Description: Displays information requested Command Function I0 Reports modem product code I1 Reports ROM checksum I2 Tests and reports ROM checksum I3 Reports model and firmware identification I5 Reports country code RTS TO CTS DELAY Type: Register Format AT [cmds] S26=n [cmds] Default: 1 Range: 0 - 255 Unit: .01 second Description: Sets the duration of delay for CTS to respond to RTS status change Note: This is only used when &R0 is set. TONE PULSE DURATION Type: Register Format AT [cmds] S11=n [cmds] Default: 95 Range: 50-255 Unit: 1 ms Description: DTMF tone pulse duration and time between tone pulses for tone dialing operations. Country Default Range Standard 95 50-255 France 85 70-90 Germany 85 85-95 Switzerland 85 70-90 Italy 85 65-150 Spain 135 135-255 TRANSMISSION LEVEL - PSTN Type Register or Configuration Format AT [cmds] S91=n [cmds] Unit -1 dBm Description Sets the signal level for transmission over switched phone lines Country Default Range Standard 12 0-15 Sweden 14 0-15