U.S. ROBOTICS, INC.
AUTO LINK 212A
| 
 Card Type  | 
 Modem (asynchronous)  | 
| 
 Chip Set  | 
 U.S. Robotics  | 
| 
 Maximum Data Rate  | 
 1200bps  | 
| 
 Data Bus  | 
 External  | 
| 
 Data Modulation Protocol  | 
 Bell 212A  | 
V2253
| 
 CONNECTIONS  | ||||||
| 
 Function  | 
 Label  | 
 Function  | 
 Label  | |||
| 
 Line out  | 
 CN1  | 
 Analog loopback switch  | 
 SW1  | |||
| 
 Line in  | 
 CN2  | 
 Originate mode switch  | 
 SW2  | |||
| 
 RS-232/422  | 
 CN3  | 
 Power switch  | 
 SW3  | |||
| 
 DC power  | 
 CN4  | 
 High speed  | 
 SW4  | |||
| 
 USER CONFIGURABLE SETTINGS  | ||
| 
 Setting  | 
 Label  | 
 Position  | 
| 
 Auto answer disabled  | 
 SW5/A  | 
 Off  | 
| 
 Auto answer enabled  | 
 SW5/A  | 
 On  | 
| 
 Local echo disabled  | 
 SW5/B  | 
 Off  | 
| 
 Local echo enabled  | 
 SW5/B  | 
 On  | 
| 
 Equalize for dial-up phone lines  | 
 SW5/C  | 
 Off  | 
| 
 Equalize for dedicated phone lines  | 
 SW5/C  | 
 On  | 
| 
 DTR normal  | 
 SW5/D  | 
 Off  | 
| 
 DTR forced high  | 
 SW5/D  | 
 On  | 
| 
 RS232C  | ||||
| 
 Setting  | 
 SW6/A  | 
 SW6/B  | 
 SW6/C  | 
 SW6/D  | 
| 
 Pin 2 receive/Pin 3 send  | 
 On  | 
 On  | 
 Off  | 
 Off  | 
| 
 Pin 2 send/Pin 3 receive  | 
 Off  | 
 Off  | 
 On  | 
 On  | 
| 
 DIAGNOSTIC LED(S)  | |||
| 
 LED  | 
 Color  | 
 Status  | 
 Condition  | 
| 
 OH  | 
 Red  | 
 On  | 
 Modem is off-hook  | 
| 
 OH  | 
 Red  | 
 Off  | 
 Modem is on-hook  | 
| 
 CD  | 
 Red  | 
 On  | 
 Carrier signal detected  | 
| 
 CD  | 
 Red  | 
 Off  | 
 Carrier signal not detected  | 
| 
 ON  | 
 Red  | 
 On  | 
 Power is on  | 
| 
 ON  | 
 Red  | 
 Off  | 
 Power is off  | 
| 
 AL  | 
 Red  | 
 On  | 
 Modem is in analog loopback test mode  | 
| 
 AL  | 
 Red  | 
 Off  | 
 Modem is not in analog loopback test mode  | 
| 
 TR  | 
 Red  | 
 On  | 
 DTR signal is high  | 
| 
 TR  | 
 Red  | 
 Off  | 
 DTR signal is low  | 
| 
 SD  | 
 Red  | 
 On  | 
 Modem is transmitting data  | 
| 
 SD  | 
 Red  | 
 Off  | 
 Modem is not transmitting data  | 
| 
 RD  | 
 Red  | 
 On  | 
 Modem is receiving data  | 
| 
 RD  | 
 Red  | 
 Off  | 
 Modem is not receiving data  | 
| 
 AN  | 
 Red  | 
 On  | 
 Auto-answer enabled  | 
| 
 AN  | 
 Red  | 
 Off  | 
 Auto-answer disabled  | 
| 
 HS  | 
 Red  | 
 On  | 
 Modem is operating at 1200bps  | 
| 
 HS  | 
 Red  | 
 Off  | 
 Modem is operating at slower than 1200bps  | 
| 
 MISCELLANEOUS TECHNICAL NOTES  | 
Note: Diagram not available.  |