MICROCOM, INC. AX/2400 Card Type Modem (synchronous/asynchronous) Chipset Microcom, Inc. Maximum Onboard Memory 8K battery-backup DRAM Maximum Data Rate 2400bps Data Bus Serial Data Modulation Bell 103A/212A ITU-T V.22, V.22bis Error Correction/Compression MNP4 [Image] CONNECTIONS Function Label Function Label Line out CN1 Volume R1 Line in CN2 Talk/data switch SW3 DC power CN3 Synchronous/asynchronous switch SW4 RS-232/422 CN4 Reset switch SW5 USER CONFIGURABLE SETTINGS Setting Label Position Busy out disabled JP1 Pins 3 & 4 closed Busy out enabled JP1 Pins 1 & 2 closed Receiver sensitivity set to -10 to -43 JP2 Pins 3 & 4 dBm closed Receiver sensitivity set to 0 to -33 dBm JP2 Pins 1 & 2 closed Pin 12 of RS-232 port indicates 1200bps JP3/A Closed connection Pin 12 of RS-232 port does not indicate JP3/A Open 1200bps connection Synchronous transmit clock on RS-232 pin JP3/B Closed 15 enabled Synchronous transmit clock on RS-232 pin JP3/B Open 15 disabled USER CONFIGURABLE SETTINGS (CON’T) Setting Label Position Pin 15 of RS-232 port does not indicate JP3/C Open 1200bps connection Pin 15 of RS-232 port indicates 1200bps JP3/C Closed connection RTS signal in on RS-232 pin 15 disabled JP3/D Open RTS signal in on RS-232 pin 15 enabled JP3/D Closed Pin 23 of RS-232 port indicates 2400bps JP4 Closed connection Pin 23 of RS-232 port does not indicate JP4 Open 2400bps connection DTR normal SW1/1 On DTR forced high SW1/1 Off Microcom SX command set enabled SW1/2 On (asynchronous mode only) AT command set enabled (asynchronous mode SW1/2 Off only) Result codes disabled (asynchronous mode SW1/3 On only) Result codes enabled (asynchronous mode SW1/3 Off only) Command echo disabled (asynchronous mode SW1/4 Off only) Command echo enabled (asynchronous mode SW1/4 On only) Auto-answer enabled (asynchronous mode SW1/5 On only) Auto-answer disabled (asynchronous mode SW1/5 Off only) CD normal (asynchronous mode only) SW1/6 On CD forced high (asynchronous mode only) SW1/6 Off Verbose result codes enabled SW1/7 On (asynchronous mode only) Numeric result codes enabled SW1/7 Off (asynchronous mode only) Command sets disabled (asynchronous mode SW1/8 On only) Command sets enabled (asynchronous mode SW1/8 Off only) MNP result codes disabled (asynchronous SW2/5 On mode only) MNP result codes enabled (asynchronous SW2/5 Off mode only) Factory defaults not restored on reset SW2/6 On (asynchronous AT command set only) Factory defaults restored on reset SW2/6 Off (asynchronous AT command set only) Switched line type (synchronous mode SW2/6 On only) Leased line type (synchronous mode only) SW2/6 Off Configuration not set to switch settings SW2/7 On on reset (asynchronous mode only) Configuration set to switch settings on SW2/7 Off reset (asynchronous mode only) Auto-answer disabled (synchronous mode SW2/7 On only) Auto-answer enabled (synchronous mode SW2/7 Off only) Line speed set to 2400bps (synchronous SW2/8 On mode only) Line speed set to 1200bps (synchronous SW2/8 Off mode only) AUTO-DIAL NUMBER (SYNCHRONOUS MODE ONLY) Setting SW1/4 SW1/5 SW1/6 SW1/7 First number Off On On On Second number On Off On On Third number On On Off On Fourth number On On On Off Disabled On On On On FLOW CONTROL (ASYNCHRONOUS MODE ONLY) Modem to DTE Modem to Modem SW2/1 SW2/2 Disabled Disabled On On XON/XOFF XON/XOFF On Off RTS/CTS XON/XOFF Off On Disabled Disabled Off Off CONNECT MODE (ASYNCHRONOUS MODE ONLY) Setting SW2/3 SW2/4 Normal mode On On Direct mode Off Off Reliable mode On Off Auto-reliable mode Off On CD, DSR, AND CTS SIGNALS (SYNCHRONOUS MODE ONLY) CD Signal DSR Signal CTS Signal SW2/4 SW2/5 Forced high Forced high Forced high On On Normal Follows OH Normal On Off High except at High except at High except at Off On disconnect disconnect disconnect Normal Forced high Forced high Off Off DIAGNOSTIC LED(S) LED Color Status Condition PWR Unidentified On Power is on PWR Unidentified Off Power is off TST Unidentified On System error has occurred or modem is retraining TST Unidentified Blinking Serial port is waiting to be configured TST Unidentified One blink Data error has occurred TST Unidentified Off Normal operation OH Unidentified On Modem is off-hook OH Unidentified Off Modem is on-hook HS Green On Modem is operating at 2400bps HS Red On Modem is operating at 1200bps HS N/A Off Modem is operating at 300bps DTR Unidentified On DTR signal is high DTR Unidentified Off DTR signal is low TX Unidentified Blinking Modem is transmitting data TX Unidentified Off Modem is not transmitting data RX Unidentified Blinking Modem is receiving data RX Unidentified Off Modem is not receiving data SUPPORTED STANDARD COMMANDS Basic AT Commands +++, ‘comma’, A/ A, B, E, H, I, M, O, P, Q, T, V, X, Z &D, &F, &G, &L, &M, &P, &R, &T, &W, &Z Extended AT Commands \A, \B, \C, \E, \G, \J, \L, \N, \O, \Q, \T, \U, \V, \X, \Y, \Z %A, %E S-Registers S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S12, S14, S16, S18, S21, S22, S23, S25, S26, S27 Note: See MHI Help File for complete command documentation. Proprietary AT Command Set BREAK TYPE Type: Configuration Format: AT [cmds] \Kn [cmds] Description: Configures action of break signal Command Break from DTE Break from Modem Break from DTE receives \B remote modem Reliable/Normal mode Direct mode \K0 Enter command Send break to Buffers Buffers mode, do not remote modem cleared and cleared and send break to immediately, break sent to break sent to remote modem. then enter remote modem. DTE. command mode. \K1 Buffers cleared Send break to Buffers Buffers and break sent remote modem cleared and cleared and to remote immediately. break sent to break sent to modem. remote modem. DTE. \K2 Enter command Send break to Send break to Send break to mode, do not remote modem remote modem DTE send break to immediately, immediately. immediately. remote modem. then enter command mode. \K3 Send break to Send break to Send break to Send break to remote modem remote modem remote modem DTE immediately. immediately. immediately. immediately. \K4 Enter command Send break to Send break to Break sent mode, do not remote modem remote modem with received send break to immediately, with data to the remote modem. then enter transmitted DTE. command mode. data. \K5 Send break with Send break to Send break to Break sent transmitted remote modem remote modem with received data. immediately. with data to the transmitted DTE. data. COMMAND SET - MICROCOM SX Type: Immediate Format: AT [cmds] \M Description: Switches to the proprietary Microcom SX command set. The modem will prompt the user to confirm this action. DATA CARRIER DETECT (DCD) SIGNAL Type: Configuration Format: AT [cmds] &Cn [cmds] Description: Controls the behaviour of the DCD signal. Command Function &C0 DCD forced high. &C1 DCD forced high after carrier signal is detected. &C2 CD forced high except during disconnect. DATA SET READY (DSR) AND CLEAR TO SEND (CTS) SIGNALS Type: Configuration Format: AT [cmds] \Dn [cmds] Description: Controls the behaviour of the DSR and CTS signals. Command Function \D0 DSR and CTS forced high. \D1 CTS follows CD. If &C is not set to 1 then DSR also follows CD, otherwise it follows OH. \D2 DSR and CTS follow CD. \D3 DSR follows answer tone, CTS forced high. 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 DL Re-dial last number. DNn If the dial attempt fails, the modem will attempt to dial stored number n. DP Pulse dialing enabled. DR Answer mode enabled; originate mode disabled following handshake initiation. DS Dial the first stored number. DT Tone dialing enabled. DW Dialing resumed following dial tone detection. D, Dialing paused for amount of time specified in S8 register. D! Flash function initiated. Modem commanded to go off-hook for time specified in S7 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/n Dial stored telephone number n. D; Modem returned to command state after dialing. The semicolon can only be placed at the end of the dial command. DISPLAY CONFIGURATION - CONNECTION Type: Immediate Format: AT [cmds] \S [cmds] Description: Displays settings pertaining to the current connection. DISPLAY S-REGISTERS Type: Immediate Format: AT [cmds] %R [cmds] Description: Displays the settings of all S-registers. DISPLAY STORED NUMBERS Type: Immediate Format: AT [cmds] \F [cmds] Description: Displays all stored phone numbers. INTERFACE PROTOCOL Type: Configuration Format: AT [cmds] \In [cmds] Description: Selects whether the modem will use the Interface Protocol to communicate with the running software package. Command Function \I0 Interface Protocol disabled. \I1 Interface Protocol enabled. LOCAL SERIAL PORT SPEED RESET Type: Immediate Format: AT [cmds] %U [cmds] Description: Instructs the modem to reset the rate of the local serial port to match the DTE’s next command. RING INDICATOR (RI) SIGNAL Type: Configuration Format: AT [cmds] \Rn [cmds] Description: Selects when the RI signal will be cleared from an incoming call. Command Function \R0 RI signal not cleared until the call has disconnected. \R1 RI signal cleared when call is answered. STORE TELEPHONE NUMBER Type: Configuration Format: AT [cmds] \Pn=<#>:xxxx Description: Writes the indicated telephone number into non-volatile memory at location n. The xxxx will be stored as a comment and will not be passed to the dial command. Proprietary Microcom SX Command Set ACCEPT MNP RELIABLE MODE Type: Immediate Format: [cmds];AR;[cmds] Description: Accept remote modem’s request for MNP reliable mode ANSWER Type: Immediate Format: [cmds];A;[cmds] Description: Enables answer mode; the modem goes off-hook. AUTO-ANSWER Type: Configuration Format: [cmds];AA xxx;[cmds] Description: Selects whether the modem will automatically answer incoming calls. Command Function AAOFF Auto-answer disabled. AAON Auto-answer enabled. AUTO-RELIABLE FALLBACK CHARACTER Type: Configuration Format: [cmds];SACn;[cmds] [cmds];SAC/x;[cmds] Default: 0 Range: 0-127 Unit: 1 ASCII character Description: Sets the character used as the auto-reliable fallback character; SAC0 will disable this function. With the second form of this command, the user may specify a character, rather than its ASCII value. AUTO-RELIABLE TIME BUFFER CONFIGURATION Type: Configuration Format: [cmds];AUTn;[cmds] Description: Controls the handling of incoming data during auto-reliable time period Command Function AUT0 Data is discarded. AUT1 Data is buffered for 4 seconds or 200 characters. AUT2 Data is discarded; modem returns to normal mode on receiving auto-reliable fallback character. AUTO-RETRAIN Type: Configuration Format: [cmds];RTxx;[cmds] Description: Controls auto-retrain mode. Command Function RTOFF Auto-retrain disabled RTON Auto-retrain enabled BREAK SEND Type: Configuration Format: [cmds];Bn;[cmds] Default: 3 Range: 1-9 Unit: .1 second Description: Sends a break to the modem. BREAK TYPE Type: Configuration Format: [cmds];SBRKn;[cmds] Description: Configures action of break signal Command Break from DTE Break from Modem Break from DTE receives \B remote modem Reliable/Normal mode Direct mode SBRK0 Enter command Send break to Buffers Buffers mode, do not remote modem cleared and cleared and send break to immediately, break sent to break sent to remote modem. then enter remote modem. DTE. command mode. SBRK1 Buffers cleared Send break to Buffers Buffers and break sent remote modem cleared and cleared and to remote immediately. break sent to break sent to modem. remote modem. DTE. SBRK2 Enter command Send break to Send break to Send break to mode, do not remote modem remote modem DTE send break to immediately, immediately. immediately. remote modem. then enter command mode. SBRK3 Send break to Send break to Send break to Send break to remote modem remote modem remote modem DTE immediately. immediately. immediately. immediately. SBRK4 Enter command Send break to Send break to Break sent mode, do not remote modem remote modem with received send break to immediately, with data to the remote modem. then enter transmitted DTE. command mode. data. SBRK5 Send break with Send break to Send break to Break sent transmitted remote modem remote modem with received data. immediately. with data to the transmitted DTE. data. COMMAND ECHO AND RESULT CODES Type: Configuration Format: [cmds];SCExx;[cmds] Description: Sets whether the modem echoes commands entered and what format it sends result codes in. Command Function SCEOFF Commands not echoed, result codes sent. SCEON Commands echoed, result codes sent in verbose format. SCENO Commands not echoed, result codes not sent. SCENUM Commands not echoed, command prompt not displayed, result codes sent in numeric format. COMMUNICATIONS MODE Type: Configuration Format: [cmds];SNCn;[cmds] Description: Selects the communications mode the modem will operate in. Command Mode SNC0 Modem operates in asynchronous mode. SNC1 Modem operates in synchronous connect mode and asynchronous off-line command mode. SNC2 Modem operates in synchronous connect mode and auto-dials first stored number on high DTR. SNC3 Modem operates in synchronous connect mode. COMMUNICATION PROTOCOL Type: Configuration Format: [cmds];BELLxx;[cmds] Description: Selects the communication protocol for data calls. Command Protocol BELLOFF Use ITU-T protocols. BELLON Use Bell protocols. CONNECT MODE Type: Configuration Format: [cmds];SMxxx;[cmds] Description: Controls the type of connection the modem will make. Command Function SMNOR Normal mode enabled. SMDIR Direct mode enabled. SMREL Reliable mode enabled. SMAUT Auto-reliable mode enabled. CONNECT SPEED Type: Configuration Format: [cmds];SBn;[cmds] Description: Sets the speed the modem will connect at. Command Function SB50 Selects 50bps. SB75 Selects 75bps. SB110 Selects 110bps. SB150 Selects 150bps. SB300 Selects 300bps. SB1200 Selects 1200bps. SB2400 Selects 2400bps. DATA CARRIER DETECT (DCD) SIGNAL Type: Configuration Format: [cmds];S1Cn;[cmds] Description: Controls the behaviour of the DCD signal. Command Function S1C0 DCD forced high. S1C1 DCD forced high after carrier signal is detected. S1C2 CD forced high except during disconnect. DATA SET READY (DSR) AND CLEAR TO SEND (CTS) SIGNALS Type: Configuration Format: [cmds];S1Dn;[cmds] Description: Controls the behaviour of the DSR and CTS signals. Command Function S1D0 DSR and CTS forced high. S1D1 CTS follows CD. If &C is not set to 1 then DSR also follows CD, otherwise it follows OH. S1D2 DSR and CTS follow CD. DIAL Type: Immediate Format: [cmds];D<#> Description: Dials the telephone number indicated 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 DL Re-dial last number. DNn If the dial attempt fails, the modem will attempt to dial stored number n. DP Pulse dialing enabled. DR Answer mode enabled; originate mode disabled following handshake initiation. DS Dial the first stored number. DT Tone dialing enabled. DW Dialing resumed following dial tone detection. D, Dialing paused for amount of time specified in S8 register. 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/n Dial stored telephone number n. D; Modem returned to command state after dialing. The semicolon can only be placed at the end of the dial command. DIAL REPEATEDLY Type: Immediate Format: [cmds];RD<#>;[cmds] Description: Dials the number indicated up to ten times, pausing a few seconds between attempts. DISPLAY CONFIGURATION - CONNECTION Type: Immediate Format: [cmds];HELP;[cmds] Description: Displays settings pertaining to the current connection. DISPLAY CONFIGURATION - CONNECTION Type: Immediate Format: [cmds];RS3;[cmds] Description: Displays settings pertaining to the current connection. DISPLAY CONFIGURATION - GENERAL Type: Immediate Format: [cmds];RS2;[cmds] Description: Displays general settings of the current configuration. DISPLAY CONFIGURATION - SERIAL PORT Type: Immediate Format: [cmds];RS;[cmds] Description: Displays settings pertaining to the serial port. DISPLAY S-REGISTERS Type: Immediate Format: [cmds];REGS;[cmds] Description: Displays the settings of all S-registers. DISPLAY STORED NUMBERS Type: Immediate Format: [cmds];RP;[cmds] Description: Displays all stored phone numbers. DATA TERMINAL READY (DTR) SIGNAL Type: Configuration Format: [cmds];SDn;[cmds] Description: Controls the modem’s response to the DTR signal. Command Function SD0 Modem does not respond to DTR. Modem disconnects when receiving a break of over 500ms. SD1 Modem goes to command mode when DTR goes low. SD2 Modem disconnects when DTR goes low and waits for the user to enter the characters "4 5" to configure the speed and parity of the serial port. SD3 Modem is initialized when DTR goes low and waits for the user to enter the characters "4 5" to configure the speed and parity of the serial port. ECHO DATA Type: Configuration Format: [cmds];SDExx;[cmds] Description: Enables modem to echo data received from DTE. Command Function SDEOFF Data echo disabled SDEON Data echo enabled ENHANCED DIAL MODE Type: Configuration Format: [cmds];DCxx;[cmds] Description: Selects whether the modem will use AX enhanced dialing modes. Command Function DCON Enhanced dialing enabled. DCOFF Enhanced dialing disabled. ESCAPE SEQUENCE Type: Immediate Format: -A Description: Initiates the escape sequence and returns the modem to the on-line command state. Note: This character can be changed by the SE command. ESCAPE SEQUENCE CHARACTER Type: Configuration Format: [cmds];SEn;[cmds] [cmds];SE/x;[cmds] Default: 1 Range: 0-127 Unit: 1 ASCII character Description: Sets the character used as for the escape sequence; SE0 will disable the escape sequence. With the second form of this command, the user may specify a character, rather than its ASCII value. FACTORY DEFAULT PROFILE Type: Configuration Format: [cmds];INIT;[cmds] Description: Resets modem to values found in the factory profile. FLOW CONTROL - MODEM TO MODEM Type: Configuration Format: AT [cmds] SFMn [cmds] Description: Selects modem to modem flow control. Command Function SFM0 Flow control disabled. SFM1 Flow control enabled. FLOW CONTROL TYPE Type: Configuration Format: [cmds];SF1n;[cmds] Description: Sets type of flow control used by the modem. Command Function SF10 Flow control disabled. SF11 Bidirectional XON/XOFF flow control enabled. SF12 CTS flow control by DCE enabled. SF13 Bidirectional RTS/CTS flow control enabled. GUARD TONE Type: Configuration Format: [cmds];SGn;[cmds] Description: Commands the modem to transmit a guard tone. Command Function SG0 Guard tone disabled SG1 550Hz guard tone enabled SG2 1800Hz guard tone enabled HANG UP Type: Immediate Format: [cmds];H;[cmds] Description: Hangs up the line. INACTIVITY TIMER Type: Configuration Format: [cmds];SITn;[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. INTERFACE PROTOCOL Type: Configuration Format: [cmds];IPxx;[cmds] Description: Selects whether the modem will use the Interface Protocol to communicate with the running software package. Command Function IPOFF Interface Protocol disabled. IPON Interface Protocol enabled. LINE TYPE Type: Configuration Format: AT [cmds] SLLxx [cmds] Description: Selects line type. Command Line Type SLLOFF Switched line. SLLON Leased-line. LOCAL SERIAL PORT SPEED Type: Configuration Format: [cmds];S1Bn;[cmds] Description: Sets the speed that the modem will communicate with the DTE. Command Function S1B50 Sets the serial port to 50bps. S1B75 Sets the serial port to 75bps. S1B110 Sets the serial port to 110bps. S1B150 Sets the serial port to 150bps. S1B300 Sets the serial port to 300bps. S1B600 Sets the serial port to 600bps. S1B1200 Sets the serial port to 1200bps. S1B2400 Sets the serial port to 2400bps. S1B4800 Sets the serial port to 4800bps. S1B9600 Sets the serial port to 9600bps. LOCK SERIAL PORT Type: Configuration Format: [cmds];BAxx;[cmds] Description: Sets operation of serial port speed. Command Function BAOFF Serial speed locked. BAON Serial speed follows connect speed. MICROCOM BANNER Type: Configuration Format: [cmds];BANxx;[cmds] Description: Selects whether the modem will transmit the Microcom banner to the DTE on reset and initialization. Command Function BANOFF Banner disabled. BANON Banner enabled. MAXIMUM BLOCK SIZE FOR TRANSMISSION Type: Configuration Format: [cmds];BLKn;[cmds] Description: Sets the maximum transmittable block size in MNP mode. Command Function BLK0 MNP block size is 64 characters. BLK1 MNP block size is 128 characters. BLK2 MNP block size is 192 characters. BLK3 MNP block size is 256 characters. MNP - STREAM/BLOCK MODE Type: Configuration Format: [cmds];BLxx;[cmds] Description: Selects the transfer mode for MNP links. Command Function BLOFF Stream mode for MNP enabled. BLON Block mode for MNP enabled. ON-LINE Type: Immediate Format: [cmds];E Description: Instructs the modem to return to the on-line state. ON-LINE WITH RETRAIN Type: Immediate Format: [cmds];ER Description: Instructs the modem to return to the on-line state and initiate a retrain sequence. PAUSE DURATION Type: Configuration Format [cmds];SPTn;[cmds] Default: 3 Range: 0-255 Unit: 1 second Description: Duration of pause per comma (,) command used in a command or dial string. PULSE DIALING RATIO Type: Configuration Format: [cmds];SDPn;[cmds] Description: Selects pulse dial make/break ratio. Command Function SDP0 39/61ms at 10pps (North America). SDP1 33/67ms at 10pps (Europe). READY TO SEND (RTS) AND CLEAR TO SEND (CTS) SIGNALS Type: Configuration Format: [cmds];CRTSn;[cmds] Description: Controls the behaviour of the CTS and RTS signals. Note: This command only functions in synchronous mode. Command Function CRTS0 CTS follows RTS in data mode; RTS is ignored in command mode. CRTS1 CTS forced high, RTS is ignored. REPORT IDENTIFICATION Type: Immediate Format: [cmds];ID;[cmds] Description: Reports the product code and firmware revision. RING INDICATOR (RI) SIGNAL Type: Configuration Format: [cmds];S1Rn;[cmds] Description: Selects when the RI signal will be cleared from an incoming call. Command Function S1R0 RI signal not cleared until the call has disconnected. S1R1 RI signal cleared when call is answered. SERIAL DATA FORMAT Type: Configuration Format: [cmds];S1Pn;[cmds] Description: Sets the word size and parity of the serial port. Command Function S1P0 7 data bits, odd parity. S1P1 7 data bits, even parity. S1P2 7 data bits, MARK parity. S1P3 7 data bits, SPACE parity. S1P4 8 data bits, no parity. SOFT RESET Type: Immediate Format: [cmds];RESET;[cmds] Description: Restores the modem to the configuration previously saved in non-volatile RAM using the &W command. SPEAKER MODE Type: Configuration Format: [cmds];SAn;[cmds] Description: Selects various speaker options. Command Function SA0 Speaker enabled until carrier signal detected. SA1 Speaker enabled. SA2 Speaker disabled. SA3 Speaker enabled following dialing, then disabled after carrier signal detected. STATUS REGISTERS Type: Configuration Format: Read: [cmds];Sn?;[cmds] Write: [cmds];Sn=a;[cmds] Description: Writes to or reads from a specified register. STORE TELEPHONE NUMBER Type: Configuration Format: [cmds];WPn <#>:xxxx Description: Writes the indicated telephone number into non-volatile memory at location n. The xxxx will be stored as a comment and will not be passed to the dial command. SWITCH TO OR ACCEPT MNP RELIABLE MODE Type: Immediate Format: [cmds];SR;[cmds] Description: Requests to convert to MNP reliable mode from normal or direct mode. Also accepts a request to convert to MNP reliable mode. SWITCH TO MNP RELIABLE MODE Type: Immediate Format: [cmds];OR;[cmds] Description: Requests to convert to MNP reliable mode from normal or direct mode. SWITCH TO NORMAL MODE Type: Immediate Format: [cmds];SN;[cmds] Description: Switches to normal mode from MNP mode. TEST MODES - TERMINATE Type: Immediate Format: [cmds];ET;[cmds] Description: Ends the test currently in progress. TEST MODES - LOCAL ANALOG LOOPBACK Type: Immediate Format: [cmds];XA;[cmds] Description: Begins a local analog loopback test. TEST MODES - LOCAL ANALOG LOOPBACK WITH SELF-TEST Type: Immediate Format: [cmds];YA;[cmds] Description: Begins a local analog loopback with self-test. TEST MODES - LOCAL DIGITAL LOOPBACK Type: Immediate Format: [cmds];XL;[cmds] Description: Begins a local digital loopback test. TEST MODES - REMOTE DIGITAL LOOPBACK REQUEST Type: Immediate Format: [cmds];RL;[cmds] Description: Requests a remote digital loopback test. TEST MODES - REMOTE DIGITAL LOOPBACK REQUEST WITH DIAL Type: Immediate Format: [cmds];XD<#> Description: Dials the indicated number and requests a remote digital loopback test. TEST MODES - REMOTE DIGITAL LOOPBACK WITH SELF-TEST REQUEST Type: Immediate Format: [cmds];RLT;[cmds] Description: Requests a remote digital loopback with self-test. TEST MODES - REMOTE DIGITAL LOOPBACK WITH SELF-TEST REQUEST WITH DIAL Type: Immediate Format: [cmds];YD<#> Description: Dials the indicated number and requests a remote digital loopback with self-test. TEST MODES - REMOTE DIGITAL LOOPBACK RESPONSE Type: Immediate Format: [cmds];RLBxx;[cmds] Description: Selects whether the modem will allow a requested remote digital loopback test. Command Function RLBOFF Modem will not allow a remote digital loopback test. RLBON Modem will allow a remote digital loopback test. XON/XOFF PASS-THROUGH Type: Configuration Format: [cmds];SXn;[cmds] Description: Selects whether XON/XOFF signals are sent to remote modem. Command Function SX0 XON/XOFF signals trapped by local modem SX1 XON/XOFF passed through local modem XON TRANSMIT Type: Immediate Format: [cmds];CMF;[cmds] Description: Sends an XON character to restart communications after a data character is misinterpreted as an XOFF character.