IBM CORPORATION MOD530 2400BPS Card Type Modem (asynchronous/synchronous) Chip Set Unidentified Maximum Data Rate 2400bps Data Bus 8-bit ISA Data Modulation Bell 103/212A Protocol ITU-T V.22, V.22bis [Image] CONNECTIONS Function Label Function Label Line out CN1 Line in CN2 SERIAL PORT ADDRESS Setting JP1/A JP1/B JP1/C JP1/D COM1 (3F8h) Closed Open Open Open COM2 (2F8h) Open Closed Open Open COM3 (3E8h) Open Open Closed Open COM4 (2E8h) Open Open Open Closed INTERRUPT Setting JP1/E JP1/F JP1/G JP1/H 3 Closed Open Open Open 4 Open Closed Open Open 5 Open Open Closed Open 7 Open Open Open Closed Proprietary AT Command Set BIT-MAPPED REGISTER S14 Format AT [cmds] S14=n [cmds] Default: 170 Range: 0-174 Unit: Bit-mapped Description: Controls echo, result codes and display, dial mode, and answer/originate mode. Bit Value Function 0 0 Not used 1 0 Command echo disabled 1 Command echo enabled 2 0 Result codes enabled 1 Result codes disabled 3 0 Display result codes in numeric format 1 Display result codes in verbose format 4 0 Not used 5 0 Tone dial enabled 1 Pulse dial enabled 6 0 Not used 7 0 Answer mode enabled 1 Originate mode enabled BIT-MAPPED REGISTER S21 Format AT [cmds] S21=n [cmds] Default: 0 Range: 0-253 Unit: Bit-mapped Description: Selects jack type, CTS/DCD/DSR signals, low DTR action, 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] Default: 118 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 level 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 and dialtone detection enabled 110 All result codes except dialtone detection enabled 111 All result codes enabled BIT-MAPPED REGISTER S23 Format AT [cmds] S23=n [cmds] Default: 7 Range: 0-189 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 01 Not used 10 Parity odd 11 No Parity 7, 6 00 Guard tone disabled 01 Guard tone disabled 10 Guard tone 1800Hz enabled BIT-MAPPED REGISTER S27 Format AT [cmds] S27=n [cmds] Default: 9 Range: 0-109 Unit: Bit-mapped Description: Selects line type, clock source, and ITU-T/Bell modes. Bit Value Function 3, 1, 0 101 Not used 2 0 Switched line 1 Leased line 5, 4 00 Local modem generates transmit clock source 01 Local DTE generates transmit clock source 10 Remote DCE/DTE generates transmit clock source 6 0 ITU/T mode 1 Bell mode BIT-MAPPED REGISTER S28 Format AT [cmds] S28=n [cmds] Default: 0 Range: 0-31 Unit: Bit-mapped Description: Controls V.23 split speed, transmit/receive speed, half duplex; and pulse dialing. Bit Value Function 0 0 V.23 split speed operation disabled 1 V.23 split speed operation enabled 1 0 75bps transmit, 1200bps receive disabled 1 1200bps transmit, 75bps receive enabled 2 0 V.23 half-duplex disabled 1 1200bps transmit, 1200bps receive enabled 4, 3 00 39ms make/61ms break at 10pps 01 33ms make/67ms break at 10pps 10 39ms make/61ms break at 20pps 11 33ms make/67ms break at 20pps BIT-MAPPED REGISTER S31 Format: AT [cmds] S31=n [cmds] Default: 2 Range: 0-10 Unit: Bit-mapped Description: Controls auto-baud function and result codes Bit Value Function 0 0 Not used 1 0 Auto-baud disabled 1 Auto-baud enabled 3, 2 00 DTE speed displayed in result codes 01 Extended result codes enabled; DCE speed displayed in result codes. 10 DCE speed displayed in result codes BIT-MAPPED REGISTER S39 Format AT [cmds] S39=n [cmds] Default: 3 Range: 0-6 Unit: Bit-mapped Description: Controls flow control Bit Value Function 2, 1, 0 000 Flow control disabled 011 Hardware flow control enabled 100 Normal software flow control enabled 101 Transparent software flow control enabled 110 Both hardware and software flow control enabled BIT-MAPPED REGISTER S40 Format AT [cmds] S40=n [cmds] Default: 105 Range: 0-239 Unit: Bit-mapped Description: Controls power level and break handling; selects MNP extended services, link negotiation, and block size. Bit Value Function 0 0 MNP extended services disabled 1 MNP extended services enabled 1 0 Power level adjustment enabled 1 Power level adjustment disabled 2 0 Link will be negotiated at highest possible speed 1 Link will be negotiated at 1200bps 5, 4, 3 000 \K0 001 \K1 010 \K2 011 \K3 100 \K4 101 \K5 7, 6 00 MNP block size is 64 characters 01 MNP block size is 128 characters 10 MNP block size is 192 characters 11 MNP block size is 256 characters BIT-MAPPED REGISTER S41 Format AT [cmds] S41=n [cmds] Default: 3 Range: 0-31 Unit: Bit-mapped Description: Selects compression, auto-retrain, flow control, and MNP mode. Bit Value Function 1 - 0 00 Data compression disabled 01 MNP5 enabled 10 V.42bis enabled 11 MNP5 and V.42bis enabled 2 0 Auto-retrain disabled 1 Auto-retrain enabled 3 0 Flow control disabled 1 Flow control enabled 4 0 Stream mode for MNP 1 Block mode for MNP FLOW CONTROL CHARACTER - XOFF Type: Register Format: AT [cmds] S33=n [cmds] Default: 19 Range: 0-255 Unit: ASCII Description: Sets the character used to represent XOFF FLOW CONTROL CHARACTER - XON Type: Register Format: AT [cmds] S32=n [cmds] Default: 17 Range: 0-255 Unit: ASCII Description: Sets the character used to represent XON REPORT INFORMATION Type: Immediate Format: AT [cmds] In [cmds] Description: Displays information requested Command Function I0 Display product identification code I1 Display ROM checksum I2 Display OK or ERROR for ROM checksum I3 Display firmware revision I4 Display OEM string I5 Display country code I6 Display data pump model SLEEP TIMER Type: Register Format AT [cmds] S24=n [cmds] Default: 0 Range: 0-255 Unit: 1 second Description: Maximum duration of DTE and DCE inactivity allowed prior to initiating low-power sleep mode. S-REGISTER - CONTENTS Type: Immediate Format: AT [cmds] ? [cmds] Description: Displays contents of last S-register access TEST MODES Type: Register Format AT [cmds] S16=n [cmds] Default: 128 Range: 0-128 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 w/ error count not in progress 1 Remote digital loopback w/ error count in progress 6 0 Local analog loopback w/ self-test not in progress 1 Local analog loopback w/ self-test in progress 7 1 Not used TRANSMISSION LEVEL - PSTN Type Register Format AT [cmds] S91=n [cmds] Default 10 Range 0-15 Unit -1 dBm Description Sets the signal level for transmission over switched phone lines TRANSMISSION LEVEL - FAX Type: Register Format: AT [cmds] S92=n [cmds] Default: 10 Range: 0-15 Unit: -1 dBm Description: Sets the signal level for transmission while in fax mode