U.S. ROBOTICS, INC.
SPORTSTER 2400
| 
 Modem Type  | 
 Data (synchronous/asynchronous)  | 
| 
 Maximum Data Rate  | 
 2400bps  | 
| 
 Data Bus  | 
 External  | 
| 
 Fax Class  | 
 Class I & II  | 
| 
 Data Modulation Protocol  | 
 Bell 103A/212A ITU-T V.22bis  | 

| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 Line out  | 
 CN1  | 
 Power in  | 
 CN4  | 
| 
 Line in  | 
 CN2  | 
 Volume  | 
 R1  | 
| 
 RS-232/422  | 
 CN3  | 
 Power switch  | 
 SW2  | 
| 
 DIAGNOSTIC LED(S)  | |||
| 
 LED  | 
 Color  | 
 Status  | 
 Condition  | 
| 
 LED1  | 
 Red  | 
 On  | 
 Analog loopback self test mode  | 
| 
 LED1  | 
 Green  | 
 On  | 
 Data mode  | 
| 
 LED2  | 
 Red  | 
 Blinking  | 
 Modem is transmitting/receiving data  | 
| 
 LED2  | 
 Green  | 
 On  | 
 Carrier signal detected  | 
| 
 DTR SIGNAL  | |
| Setting | 
 SW1/1  | 
| » On | 
 DTR forced high  | 
| Off | 
 DTR normal  | 
| 
 RESULT CODES  | |
| Setting | 
 SW1/2  | 
| » Off | 
 Extended result codes enabled  | 
| On | 
 Extended result codes disabled  | 
| 
 RESULT CODES DISPLAY  | |
| Setting | 
 SW1/3  | 
| » On | 
 Display disabled  | 
| Off | 
 Display enabled  | 
| 
 ECHO DISPLAY  | |
| Setting | 
 SW1/4  | 
| » Off | 
 Local echo enabled  | 
| On | 
 Local echo disabled  | 
| 
 AUTO ANSWER  | |
| Setting | 
 SW1/5  | 
| » On | 
 Modem doe not answer on first ring  | 
| Off | 
 Modem answers on first ring  | 
| 
 CARRIER DETECT  | |
| Setting | 
 SW1/6  | 
| » Off | 
 CD normal  | 
| On | 
 CD forced high  | 
| 
 MULTIPLE PHONE INSTALLATION  | |
| Setting | 
 SW1/7  | 
| » Off | 
 Single phone connected  | 
| On | 
 Multiple phones connected  | 
| 
 AT COMMAND SET  | |
| Setting | 
 SW1/8  | 
| » On | 
 AT command set recognized  | 
| Off | 
 AT command set disabled  | 
Proprietary AT Command Set
| 
 TIME DISPLAY  | |
| 
 Type:  | 
 Immediate  | 
| 
 Format:  | 
 AT [cmds] Kn [cmds]  | 
| 
 Example:  | 
 AT K1 *L2 #E1<CR>  | 
| 
 Description:  | 
 Displays the current call time or clock time.  | 
| 
 Command  | 
 Function  | 
| 
 K0  | 
 Display length of last call.  | 
| 
 K1  | 
 Display actual time.  | 
| 
 HELP SCREENS  | |
| 
 Type:  | 
 Immediate  | 
| 
 Format:  | 
 AT <prefix>$ | 
| 
 Example:  | 
 AT &$ <CR> | 
| 
 Description:  | 
 Shows command help screens for all commands beginning with the given prefix, or no prefix if none is given.  | 
| 
 Command  | 
 Function  | 
| 
 $  | 
 Shows ATx help screen.  | 
| 
 D$  | 
 Shows ATDx help screen.  | 
| 
 S$  | 
 Shows S-register help screen.  | 
| 
 REPEAT COMMAND STRING  | |
| 
 Type:  | 
 Configuration  | 
| 
 Format:  | 
 AT [cmds] >  | 
| 
 Example:  | 
 AT DT1(303) 443-3388 > <CR> | 
| 
 Description:  | 
 Causes modem to repeat command string until a keyboard key is pressed.  | 
| 
 ANALOG LOOPBACK SELF TEST  | |
| 
 Type:  | 
 Register  | 
| 
 Format:  | 
 AT [cmds] S16=n [cmds]  | 
| 
 Example:  | 
 ATS16=139 <CR> | 
| 
 Description:  | 
 Selects the tone dialing test.  | 
| Command | 
 Function  | 
| 
 0  | 
 Data mode.  | 
| 
 1  | 
 Analog loopback.  | 
| 
 2  | 
 Dial testing.  | 
| 
 4  | 
 Test pattern.  | 
| 
 5  | 
 Analog loopback and test pattern.  |