U.S. ROBOTICS, INC. SPORTSTER 28,800 EXTERNAL Modem Type Data (synchronous/asynchronous)/Fax 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.23, V.32, V.32bis, V.25 Fax Modulation Protocol ITU-T V.17, V.21CH2, V.27ter, V.29 Error Correction/Compression MNP5, V.42, V.42bis [Image] CONNECTIONS Purpose Location Purpose Location Line out CN3 DC power CN1 Line in CN4 Volume R1 RS-232/422 CN2 Power switch SW2 DTR SIGNAL Setting SW1/1 » DTR normal Off DTR forced high On RESULT CODES Setting SW1/2 » Verbal result codes enabled Off Numeric result codes enabled On RESULT CODES DISPLAY Setting SW1/3 » Enabled On Disabled Off ECHO DISPLAY Setting SW1/4 » Enabled Off Disabled On AUTO ANSWER Setting SW1/5 » Disabled On Enabled Off CARRIER DETECT Setting SW1/6 » CD normal Off CD forced high On SOFTWARE RESET Setting SW1/7 » CD normal Off CD forced high On AT COMMAND SET Setting SW1/8 Enabled On Disabled Off DIAGNOSTIC LED(S) LED Color Status Mode Condition AA Red On Answer Auto-answer enabled AA Red Off N/A Auto-answer disabled AA Red Blinking N/A Phone is ringing CD Red On N/A Carrier signal detected CD Red Off N/A Carrier signal not detected RD Red Blinking N/A Modem is receiving data or sending result codes RD Red Off N/A Modem is not receiving data SD Red Blinking N/A Modem is transmitting data SD Red Off N/A Modem is not transmitting data TR Red On N/A DTR signal is high TR Red Off N/A DTR signal is low CS Red On N/A CTS high CS Red Off N/A CTS normal ARQ/FAX Red On Data Error control connection established ARQ/FAX Red Blinking Data Error control data is being transmitted ARQ/FAX Red Blinking Fax Modem is connected in FAX mode Proprietary AT Command Set BIT-MAPPED REGISTER S13 Format: AT [cmds] S13=n [cmds] Example: ATS13=13 Default: 0 Range: 0 - 89 Unit: Bit-mapped Description: Controls DTR reset, DTR dialing, reset dialing, and MNP3. Bit Value Function 0 » 0 DTR normal. 1 Reset on low DTR. 1 » 0 Not used. 2 » 0 Not used. 3 » 0 DTR dialing disabled. 1 DTR dialing enabled. 4 » 0 Reset dialing disabled. 1 Reset dialing enabled. 5 » 0 Not used. 6 » 0 MNP 3 enabled. 1 MNP 3 disabled. 7 » 0 Not used. BIT-MAPPED REGISTER S15 Format: AT [cmds] S15=n [cmds] Example: ATS15=13 Default: 0 Range: 0 - 56 Unit: Bit-mapped Description: Controls non-error-correcting mode buffer, MNP4, and BS/DEL switch. Bit Value Function 0 » 0 Not used. 1 » 0 Not used. 2 » 0 Not used. 3 » 0 Non-error-correcting mode transmit buffer set to 1.5KB. 1 Non-error-correcting mode transmit buffer set to 128 bytes. 4 » 0 MNP 4 enabled. 1 MNP 4 disabled. 5 » 0 Use backspace key for delete disabled. 1 Use backspace key for delete enabled. BIT-MAPPED REGISTER S27 Format: AT [cmds] S27=n [cmds] Example: ATS27=139 Default: 0 Range: 0 - 191 Unit: Bit-mapped Description: Controls V.21, V.32 encoding and modulation, V.42 answer tone and handshake, and 9600 result codes. Bit Value Function 0 » 0 V.21 disabled. 1 V.21 enabled. 1 » 0 V.32 trellis coding disabled. 1 V.32 trellis coding enabled. 2 » 0 V.32 modulation enabled. 1 V.32 modulation disabled. 3 » 0 2100Hz answer tone enabled. 1 2100Hz answer tone disabled. 5, 4 » 00 V.42 detect, LAPM and MNP enabled. 01 V.42 detect and LAPM enabled. 10 MNP enabled. 11 LAPM enabled. 6 » 0 Not used. 7 » 0 Actual result codes displayed. 1 Force 9600 result codes. COMPRESSION AND ERROR CORRECTION Format: AT [cmds] S51=n [cmds] Example: ATS51=3 Default: 0 Range: 0 - 7 Unit: Bit-mapped Description: Selects compression and error correction for specific modulations. Bit Value Function 0 » 0 MNP/V.42 enabled during V.22 operation. 1 MNP/V.42 disabled during V.22 operation. 1 » 0 MNP/V.42 enabled during V.22bis operation. 1 MNP/V.42 disabled during V.22bis operation. 2 » 0 MNP/V.42 enabled during V.32bis operation. 1 MNP/V.42 disabled during V.32bis operation. BIT-MAPPED REGISTER S56 Format: AT [cmds] S56=n [cmds] Example: ATS56=139 Default: 0 Range: 0 - 223 Unit: Bit-mapped Description: Controls non-linearing coding, TX level deviation, pre-emphasis, pre-coding, shaping, V.34, and V.FC. Bit Value Function 0 » 0 Non linearing coding enabled. 1 Non linearing coding disabled. 1 » 0 TX level deviation enabled. 1 TX level deviation disabled. 2 » 0 Pre-emphasis enabled. 1 Pre-emphasis disabled. 3 » 0 Pre-coding enabled. 1 Pre-coding disabled. 4 » 0 Shaping enabled. 1 Shaping disabled. 5 » 0 Not used. 6 » 0 V.34 enabled. 1 V.34 disabled. 7 » 0 V.FC enabled. 1 V.FC disabled. BREAK LENGTH Type: Register Format: AT [cmds] S21=n [cmds] Example: ATS21=20 Default: 10 Range: 0-255 Unit: 10 ms Description: Sets the length of error correction mode breaks sent from DCE to DTE in ARQ mode. BREAK TYPE Type: Configuration Format: AT [cmds] &Yn [cmds] Example: AT &Y0 Description: Configures action of break signal. Command Function &Y0 Break empties buffer. » &Y1 Break empties buffer and is sent immediately. &Y2 Break does not empty buffer and is sent immediately. CONNECTION SPEED UPPER LIMIT Type: Configuration Format: AT [cmds] &Nn [cmds] Example: AT &N1 DT555-1212 Description: Sets required connection speed if &U is set to 0. Otherwise, sets fastest allowed connection speed. Command Function » &N0 Variable. &N1 300bps &N2 1200bps &N3 2400bps &N4 4800bps &N5 7200bps &N6 9600bps &N7 12Kbps &N8 14.4Kbps &N9 16.8Kbps &N10 19.2Kbps &N11 21.6Kbps &N12 24Kbps &N13 26.4Kbps &N14 28.8Kbps CONNECTION SPEED LOWER LIMIT Type: Configuration Format: AT [cmds] &Un [cmds] Example: AT &U1 DT555-1212 Description: Sets slowest allowed connection speed if &N is set to 1 or higher. Command Function » &U0 Disabled. &U1 300bps &U2 1200bps &U3 2400bps &U4 4800bps &U5 7200bps &U6 9600bps &U7 12000bps &U8 14400bps &U9 16800bps &U10 19200bps &U11 21600bps &U12 24000bps &U13 26400bps &U14 28800bps ERROR CONTROL MODE Type: Configuration Format: AT [cmds] &Mn [cmds] Example: AT &M1 %C1 Description: Selects active error-control protocols. Command Function &M0 Normal mode, error control disabled. » &M4 Normal/ARQ. &M5 ARQ mode. ESCAPE CHARACTER RESPONSE Type: Register Format: AT [cmds] S14=n [cmds] Example: ATS14=0 Default: 0 Description: Controls reaction to escape character. Command Function » S14=0 Normal operation. S14=1 When +++ is received, modem goes on hook, enters command state and sends NO CARRIER result code. EXTENDED RESULT CODES Type: Configuration Format: AT [cmds] &An [cmds] Example: AT &A1 %C1 Description: Selects extended result codes. Command Function &A0 Extended result codes disabled. &A1 ARQ result codes enabled. &A2 V.32 result code enabled. » &A3 Error correction and compression result codes enabled. FLOW CONTROL CHARACTER - XON Type: Register Format: AT [cmds] S22=n [cmds] Example: ATS22=20 Default: 17 Range: 0-127 Unit: ASCII Description: Sets the character used to represent XON. FLOW CONTROL CHARACTER - XOFF Type: Register Format: AT [cmds] S23=n [cmds] Example: ATS23=20 Default: 19 Range: 0-127 Unit: ASCII Description: Sets the character used to represent XOFF. FLOW CONTROL PASSTHROUGH Type: Configuration Format: AT [cmds] &In [cmds] Example: AT &I0 &W Description: Allows modem to act on, then transmit XON/XOFF characters. Command Function » &I0 Software flow control disabled. &I1 XON/XOFF passthrough enabled. &I2 XON/XOFF passthrough disabled. FLOW CONTROL TYPE Type: Configuration Format: AT [cmds] &Hn [cmds] Example: AT &H0 A Description: Sets type of flow control used by modem. Command Function &H0 Flow control disabled. » &H1 CTS/RTS flow control enabled. &H2 XON/XOFF flow control enabled. &H3 CTS/RTS and XON/XOFF flow control enabled. HELP SCREENS Type: Immediate Format: AT $ Example: AT &$ Description: Shows command help screens for all commands beginning with the given prefix, or no prefix if none is given. Command Function $ Shows AT help screen. &$ Shows AT& help screen. INACTIVITY TIMER Type: Register Format: AT [cmds] S19=n [cmds] Example: ATS19=20 Default: 0 Range: Unidentified 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] &Bn [cmds] Example: AT &N9 &B0 Description: Sets operation of serial port speed. Command Function &B0 Serial speed follows connect speed. » &B1 Serial speed locked. &B2 Serial speed locked in ARQ mode only. MAPPING Format: AT [cmds] S55=n [cmds] Example: ATS55=13 Default: 0 Range: 0 - 15 Unit: Bit-mapped Description: Controls mapping. Bit Value Function 0 » 0 8S-2D map enabled. 1 8S-2D map disabled. 1 » 0 16S-4D map enabled. 1 16S-4D map disabled. 2 » 0 32S-2D map enabled. 1 32S-2D map disabled. 3 » 0 64S-4D map enabled. 1 64S-4D map disabled. REPORT INFORMATION Type: Immediate Format: AT [cmds] In [cmds] Example: AT I1 O Description: Displays modem properties. Command Function I0 Reports product code. I1 Reports ROM checksum result. I2 Reports RAM checksum result. I3 Reports firmware version. I4 Reports current command settings. I5 Reports current NVRAM settings. I6 Reports current connection’s statistics. I7 Reports configuration. BAUD RATE Format: AT [cmds] S54=n [cmds] Example: ATS54=139 Default: 0 Range: 0 - 255 Unit: Bit-mapped Description: Controls baud rate. Bit Value Function 0 » 0 2400 baud rate enabled. 1 2400 baud rate disabled. 1 » 0 2743 baud rate enabled. 1 2743 baud rate disabled. 2 » 0 2800 baud rate enabled. 1 2800 baud rate disabled. 3 » 0 3000 baud rate enabled. 1 3000 baud rate disabled. 4 » 0 3200 baud rate enabled. 1 3200 baud rate disabled. 5 » 0 3429 baud rate enabled. 1 3429 baud rate disabled. 6 » 0 Call indicate during V.34 operation enabled. 1 Call indicate during V.34 operation disabled. 7 » 0 V.8 during V.34 operation enabled. 1 V.8 during V.34 operation disabled. TONE DIALING TEST Type: Register Format: AT [cmds] S16=n [cmds] Example: ATS16=1 Description: Selects the tone dialing test Command Function » S16=0 Tone dialing test disabled. S16=1 Tone dialing test enabled. V.32 AND V.32bis MODULATIONS Format: AT [cmds] S34=n [cmds] Example: ATS34=13 Default: 6 Range: 0 - 15 Unit: Bit-mapped Description: Controls V.32 and V.32bis modulations. Bit Value Function 0 » 0 V.32bis enabled. 1 V.32bis disabled. 1 » 1 Not used. 2 » 1 Not used. 3 » 0 V.32 modulation disabled. 1 V.32 modulation enabled. V.32 HANDSHAKE TIME Type: Register Format: AT [cmds] S28=n [cmds] Example: ATS28=20 Default: 8 Range: 0-255 Unit: .1 second Description: Sets length of V.32 handshake.