MEGAHERTZ CORPORATION C6144/C5144/Z3144/Z5144 Modem Type Data (synchronous/asynchronous)/Fax Maximum Data Rate 14.4Kbps Maximum Fax Rate 14.4Kbps Data Bus Internal Fax Class Class II Data Modulation Protocol Bell 103A/212A ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis Fax Modulation Protocol ITU-T V.17, V.21CH2, V.27ter, V.29 Error Correction/Compression MNP5, V.42, V.42bis V1286 Proprietary AT Command Set AUTO-RELIABLE FALLBACK CHARACTER Type: Register Format: AT [cmds] %An [cmds] Example: AT%A0 Default: 0 Range: 0-127 Unit: ASCII Description: Sets the character used as the auto-reliable fallback character. %A0 will disable this function. AUTO-RELIABLE TIME BUFFER CONFIGURATION Type: Configuration Format: AT [cmds] \Cn [cmds] Example: AT \C1 &W Description: Controls the handling of incoming data during auto-reliable time period. Command Function \CO Data is discarded. \C1 Data is buffered. \C2 Data is discarded, sets to normal mode and sends auto-reliable character to serial port. AUTO-RETRAIN Type: Configuration Format: AT [cmds] %En [cmds] Example: AT %E1 Description: Selects auto-retrain mode. Command Function %E0 Auto-retrain disabled. %E1 Auto-retrain enabled. BIT-MAPPED REGISTER S14 Format AT [cmds] S14=n [cmds] Example: ATS14=10 Default: 10 Range: 0 - 174 Unit: Bit-mapped Description: Controls echo commands, result codes, pulse/tone dialing, and answer/originate modes. Bit Value Function 0 0 Not used. 1 0 Echo disabled. 1 Echo enabled. 2 0 Result codes disabled. 1 Result codes enabled. 3 0 Numeric form. 1 Verbose form. 4 0 Not used. 5 0 Tone dialing enabled. 1 Pulse dialing enabled. 6 0 Not used. 7 0 Answer enabled. 1 Originate enabled. BIT-MAPPED REGISTER S21 Format AT [cmds] S21=n [cmds] Example: ATS21=4 Default: 4 Range: 0 - 253 Unit: Bit-mapped Description: Controls jack type, CTS signal, low DTR action, DCD signal, DSR signal, and the Long Space Disconnect function. Bit Value Function 0 0 Selects RJ-11, RJ-41S, or RJ45S jack. 1 Selects RJ-12 or RJ-13 jack. 1 0 Not used. 2 0 CTS follows RTS. 1 CTS forced high. 4, 3 00 DTR signal ignored. 01 Modem goes to command mode on low DTR. 10 Modem disconnects on low DTR. Auto-Answer is disabled. 11 Modem is initialized on low DTR. 5 0 DCD forced high. 1 DCD normal. 6 0 DSR forced high. 1 DSR normal. 7 0 Long Space Disconnect function disabled. 1 Long Space Disconnect function enabled. BIT-MAPPED REGISTER S22 Format AT [cmds] S22=n [cmds] Example: ATS22=117 Default: 117 Range: 0-127 Unit: Bit-mapped Description: Controls speaker volume and controls, and limits results codes. Bit Value Function 1, 0 00 Off volume. 01 Low volume. 10 Medium level volume. 11 High level volume. 3, 2 00 Speaker off. 01 Speaker off on carrier. 10 Speaker always on. 11 Speaker on during handshake. 6, 5, 4 000 Basic result codes only enabled. 100 Basic and connection speed result codes enabled. 101 Basic and connection speed result codes 110 and dialtone detection enabled. 111 All result codes except dialtone detection enabled. All result codes enabled. BIT-MAPPED REGISTER S23 Format AT [cmds] S23=n [cmds] Example: ATS23=183 Default: 183 Range: 0-255 Unit: Bit-mapped Description: Grants/denies remote digital loopback, controls DTE rate and parity, and sets guard tone. Bit Value Function 0 0 Remote digital loopback denied. 1 Remote digital loopback allowed. 3, 2, 1 000 Sets serial port speed to 0-300bps. 001 Sets serial port speed to 600bps. 010 Sets serial port speed to 1200bps. 011 Sets serial port speed to 2400bps. 100 Sets serial port speed to 4800bps. 101 Sets serial port speed to 9600bps. 110 Sets serial port speed to 19200bps. 5,4 00 Parity even. 10 Parity odd. 11 No parity. 7, 6 00 Guard tone disabled. 01 Guard tone disabled. 10 Guard tone 1800Hz enabled. BREAK SEND Type: Configuration Format: AT [cmds] \Bn [cmds] Example: AT \B3 &W Range: 1-9 Unit: 100ms Description: Sends break to modem. BREAK TYPE Type: Configuration Format: AT [cmds] \Kn [cmds] Example: AT \K1 Description: Configures action of break signal. Command Break from DTE Modem receives Break received \B from remote modem \K0 Online command Break sent to Buffers mode enabled, remote modem and cleared, break send no break to buffered sent to DTE. remote modem. cleared. \K1 Break sent to Break sent to Buffers remote modem and remote modem and cleared, break buffered buffered sent to DTE. cleared. cleared. \K2 Online command Send break to Break sent mode enabled, remote modem immediately to send no break to immediately. DTE. remote modem. \K3 Send break to Send break to Break sent remote modem remote modem immediately to immediately. immediately. DTE. \K4 Online command Send break with Break sent with mode enabled, transmitted received data send no break to data. to the DTE. remote modem. \K5 Send break with Send break with Break sent with transmitted transmitted received data data. data. to the DTE. COMPRESSION Type: Configuration Format: AT %Cn Example: AT \N7 %C1 *AP0 Description: Selects data compression. Command Function %C0 Data compression disabled. %C1 Data compression enabled. CONNECT MODE Type: Configuration Format: AT [cmds] \Nn [cmds] Example: AT \N1 DT555-1212 Description: Sets connect mode. Command Function \N0 Normal mode enabled. \N1 Normal mode enabled. \N2 Reliable MNP mode enabled. \N3 Auto-reliable MNP mode enabled. \N4 Reliable LAPM mode enabled. \N5 Auto-reliable LAPM mode enabled. \N6 Reliable LAPM mode with fallback to MNP enabled. \N7 Auto-reliable LAPM mode with fallback to MNP enabled. CONNECTION SPEED LOWER LIMIT Type: Configuration Format: AT [cmds] %Mn [cmds] Example: AT %M300 \JO Description: Sets slowest allowed connection speed. Command Function %M300 Select 300bps minimum speed. %M1200 Select 1200bps minimum speed. %M2400 Select 2400bps minimum speed. %M4800 Select 4800bps minimum speed. %M7200 Select 7200bps minimum speed. %M9600 Select 9600bps minimum speed. %M12000 Select 12Kbps minimum speed. %M14400 Select 14.4Kbps minimum speed. CONNECTION SPEED UPPER LIMIT Type: Configuration Format: AT [cmds] %Bn [cmds] Example: AT %L3 %B9600 \J0 Description: Sets fastest allowed connection speed. Command Function %B300 Select 300bps maximum speed. %B1200 Select 1200bps maximum speed. %B2400 Select 2400bps maximum speed. %B4800 Select 4800bps maximum speed. » %B9600 Select 9600bps maximum speed. %B7200 Select 7200bps maximum speed. %B12000 Select 12Kbps maximum speed. %B14400 Select 14.4Kbps maximum speed. EXTENDED RESULT CODES Type: Configuration Format: AT [cmds] \Vn [cmds] Example: AT \V1 %C1 Description: Selects extended result codes. Command Function \V0 Extended result codes disabled. \V1 Reliable mode result codes enabled. \V2 Reliable mode, error control, and compression result codes enabled. FLOW CONTROL Type: Configuration Format: AT [cmds] \Gn [cmds] Example: AT \G1 &K3 Description: Selects modem port flow control. Command Function \G0 Flow control disabled. \G1 Flow control enabled. FLOW CONTROL - ENQ/ACK Type: Configuration Format: AT [cmds] \Hn [cmds] Example: AT \H9 Description: Selects ENQ/ACK pacing. Command Function \H0 Disables ENQ/ACK pacing. \H1 Enables ENQ/ACK pacing in terminal mode. \H2 Enables ENQ/ACK pacing in host mode. FLOW CONTROL TYPE Type: Configuration Format: AT [cmds] \Qn [cmds] Example: AT \Q5 Description: Sets type of flow control used by modem. Command Function \Q0 Flow control disabled. \Q1 Bi-directional XON/XOFF flow control enabled. \Q2 Unidirectional CTS/RTS flow control enabled. \Q3 Bi-directional CTS/RTS flow control enabled. \Q4 Unidirectional XON/XOFF flow control enabled. \Q5 Unidirectional CTS/RTS flow control enabled with CTS forced low until connect. \Q6 Bi-directional CTS/RTS flow control enabled with CTS forced low until connect. INACTIVITY TIMER Type: Configuration Format: AT [cmds] \Tn [cmds] Example: AT\T20 Default: 0 Range: 0 - 90 Unit: 1 minute Description: Sets the length of time that the modem does not receive information before it disconnects. LOCK SERIAL PORT Type: Configuration Format: AT [cmds] \Jn [cmds] Example: AT %L3 %B14 \J0 Description: Sets operation of serial port speed. Command Function \J0 Serial speed locked. \J1 Serial speed follows connect speed. MAXIMUM BLOCK SIZE FOR TRANSMISSION Type: Configuration Format: AT [cmds] \An [cmds] Example: AT \A3 %C1 Description: Sets the maximum transmittable block size. Command Function \A0 Maximum MNP block size is 64 characters. \A1 Maximum MNP block size is 128 characters. \A2 Maximum MNP block size is 192 characters. \A3 Maximum MNP block size is 256 characters. PROTOCOL Type: Configuration Format: AT [cmds] Bn [cmds] Example: AT S27=64 Description: Selects the active protocols. Command Function S27=0 ITU-T protocols. S27=64 Bell protocols. REPORT PRODUCT VERSION Type: Immediate Format: AT [cmds] %V [cmds] Example: AT I3 &V1 %V Description: Reports product version. SDLC CONFIGURATION Format AT [cmds] S19=n [cmds] Example: AT S19=40 Default: 0 Range: 0 - 22 Unit: Bit-mapped Description: Controls synchronous communication mode, SDLC address detection, and SDLC idle. Bit Value Function 0 0 Not used. 1 0 Binary synchronous communication. 1 SDLC. 2 0 SDLC address detect disabled. 1 SDLC address detect enabled. 3 0 Not used. 4 0 SDLC idle MARK 1 SDLC idle FLAG SWITCH TO MNP MODE Type: Configuration Format: AT [cmds] \Z [cmds] Example: AT \Z &W Description: Switches to normal mode from MNP mode. TEST MODES Format AT [cmds] S16=n [cmds] Example: AT S16=40 Default: Unidentified Range: 0 - 125 Unit: Bit-mapped Description: Controls loopback tests, analog, digital, remote digital, and self tests. Bit Value Function 0 0 Local analog loopback not in progress. 1 Local analog loopback in progress. 1 0 Not used. 2 0 Local digital loopback not in progress. 1 Local digital loopback in progress. 3 0 Modem not in remote digital loopback. 1 Remote digital loopback in progress. 4 0 Remote digital loopback not requested. 1 Remote digital loopback requested. 5 0 Remote digital loopback with self-test not in progress. 1 Remote digital loopback with self-test in progress. 6 0 Local analog loopback with self-test not in progress. 1 Local analog loopback with self-test in progress. XON/XOFF PASS-THROUGH Type: Configuration Format: AT [cmds] \Xn [cmds] Example: AT \X1 O Description: Selects whether XON/XOFF signals are sent to remote modem. Command Function \X0 XON/XOFF signals trapped by local modem. \X1 XON/XOFF passed through local modem.