COMPUTER PERIPHERALS, INC. VIVA 24M Modem Type Data (synchronous/asynchronous) Maximum Data Rate 2400bps Data Bus External Data Modulation Protocol Bell 103A/212A ITU-T V.21, V.22, V.22bis Error Correction/Compression MNP5 [Image] CONNECTIONS Purpose Location Purpose Location Line out CN1 DC power CN4 Line in CN2 Power switch SW1 RS-232/422 CN3 DIAGNOSTIC LED(S) LED Color Status Condition HS Red On Modem is operating at 2400bps HS Red Off Modem is operating at slower than 2400bps AA Red On Auto-answer enabled AA Red Off Auto-answer disabled AA Red Blinking Phone is ringing CD Red On Carrier signal detected CD Red Off Carrier signal not detected OH Red On Modem is off-hook OH Red Off Modem is on-hook RD Red On Modem is receiving data RD Red Off Modem is not receiving data SD Red On Modem is transmitting data SD Red Off Modem is not transmitting data TR Red On DTR signal is high TR Red Off DTR signal is low MR Red Blinking Loopback tests enabled MR Red On Power is on MR Red Off Power is off Note: The LEDs are Icons. Proprietary AT Command Set ACCEPT RELIABLE MODE Type: Immediate Format: AT [cmds] \U Example: AT \U Description: Accepts remote modem’s request for reliable link. AUTO-RELIABLE FALLBACK CHARACTER Type: Configuration Format: AT [cmds] %An [cmds] Example: AT %A0 Default: Unidentified 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 \C0 &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. BREAK SEND Type: Configuration Format: AT [cmds] \Bn [cmds] Example: AT \B3 Default: 3 Range: 1-9 Unit: .1 second Description: Sends break to modem. BREAK TYPE Type: Configuration Format: AT [cmds] \Kn [cmds] Example: AT \K5 Description: Configures action of break signal. Command Break from DTE Break from Break from Modem DTE remote modem receives \B 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 DTE. remote modem. 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. DTE. remote modem. \K2 Enter command Send break to Send break to Send break to mode, do not remote modem DTE remote modem 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 DTE remote modem immediately. immediately. immediately. immediately. \K4 Enter command Send break to Break sent Send break to mode, do not remote modem with received remote modem send break to immediately, data to the with remote modem. then enter DTE. transmitted command mode. data. » \K5 Send break with Send break to Break sent Send break to transmitted remote modem with received remote modem data. immediately. data to the with DTE. transmitted data. COMPRESSION Type: Configuration Format: AT [cmds] %Cn [cmds] Example: AT %C1 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 Description: Sets connect mode. Command Function \N0 Normal mode enabled. » \N1 Direct mode enabled. \N2 Reliable mode enabled. \N3 Auto-reliable mode enabled. CONVERT TO RELIABLE MODE Type: Immediate Format: AT [cmds] \Y Example: AT \Y Description: Initiates reliable mode link. DISPLAY CURRENT COMMAND STATUS Type: Immediate Format: AT [cmds] \S [cmds] Example: AT \S Description: Displays current setting of modem commands. ECHO DATA Type: Configuration Format: AT [cmds] \En [cmds] \Example: AT \E0 Description: Enables modem to echo received data. Command Function » \E0 Data echo disabled. \E1 Data echo enabled. FLOW CONTROL Type: Configuration Format: AT [cmds] \Gn [cmds] Example: AT \G0 Description: Selects modem port flow control. Command Function » \G0 Flow control disabled. \G1 Flow control enabled. FLOW CONTROL TYPE Type: Configuration Format: AT [cmds] \Qn [cmds] Example: AT \Q0 Description: Sets type of flow control used by modem. Command Function » \Q0 Flow control disabled. \Q1 XON/XOFF flow control enabled. \Q2 CTS flow control to DTE enabled. \Q3 RTS/CTS flow control enabled. INACTIVITY TIMER Type: Configuration Format: AT [cmds] \Tn [cmds] Example: AT\T0 Default: 0 Range: 0-90 Unit: 1 minute Description: Sets the length of time that the modem does not receive information before it disconnects. Note: \T0 will disable inactivity timer. LOCK SERIAL PORT Type: Configuration Format: AT [cmds] \Jn [cmds] Example: AT \J1 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 MNP block size is 64 characters. \A1 MNP block size is 128 characters. \A2 MNP block size is 192 characters. » \A3 MNP block size is 256 characters. MNP RESULT CODES Type: Configuration Format: AT [cmds] \Vn [cmds] Example: AT \V1 Description: Selects MNP result codes. Command Function » \V0 MNP result codes disabled. \V1 MNP result codes enabled. MNP STREAM/BLOCK MODE Type: Configuration Format: AT [cmds] \Ln [cmds] Example: AT \L0 Description: Selects the transfer mode for MNP. Command Function » \L0 Stream mode for MNP enabled. \L1 Block mode for MNP enabled. ON-LINE IN RELIABLE MODE Type: Immediate Format: AT [cmds] \O Example: AT \O Description: Returns to on-line and requests reliable mode connection. SWITCH TO MNP MODE Type: Immediate Format: AT [cmds] \Z Example: AT \Z Description: Switches to normal mode from MNP mode. XON/XOFF PASS-THROUGH Type: Configuration Format: AT [cmds] \Xn [cmds] Example: AT \X0 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.