UNIDENTIFIED
2400BPS MODEM (0302AMC)
| 
 Card Type  | 
 Modem (asynchronous)  | 
| 
 Chip Set  | 
 Unidentified  | 
| 
 Maximum Data Rate  | 
 2400bps  | 
| 
 Data Bus  | 
 8-bit ISA  | 
| 
 Data Modulation Protocol  | 
 Bell 103A/212A ITU-T V.22, V.22bis  | 
| 
 Error Correction/Compression  | 
 MNP5, V.42, V.42bis  | 

| 
 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  | 
 Closed  | 
 Open  | 
| 
 COM2 (2F8h)  | 
 Closed  | 
 Open  | 
 Open  | 
 Closed  | 
| 
 COM3 (3E8h)  | 
 Open  | 
 Closed  | 
 Closed  | 
 Open  | 
| 
 COM4 (2E8h)  | 
 Open  | 
 Closed  | 
 Open  | 
 Closed  | 
| 
 INTERRUPT  | ||||
| 
 Setting  | 
 JP1/E  | 
 JP1/F  | 
 JP1/G  | 
 JP1/H  | 
| 
 2  | 
 Open  | 
 Open  | 
 Open  | 
 Closed  | 
| 
 3  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | 
| 
 4  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
| 
 5  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
| 
 WAIT STATE  | ||
| 
 Setting  | 
 JP1/I  | 
 JP1/J  | 
| 
 0  | 
 Closed  | 
 Open  | 
| 
 1  | 
 Open  | 
 Closed  | 
Proprietary AT Command Set
| 
 BIT MAPPED REGISTERS  | |
| 
 Register  | 
 Default  | 
| 
 S14  | 
 170  | 
| 
 S21  | 
 0  | 
| 
 S22  | 
 118  | 
| 
 S23  | 
 7  | 
| 
 S27  | 
 64  | 
| 
 S28  | 
 0  | 
| 
 DTMF ATTENUATION  | |
| 
 Type:  | 
 Configuration  | 
| 
 Format:  | 
 AT [cmds] %Dn [cmds]  | 
| 
 Default:  | 
 0  | 
| 
 Range:  | 
 1-7  | 
| 
 Unit:  | 
 2 dBm  | 
| 
 Description:  | 
 Controls DTMF attenuation  | 
| 
 SECONDARY DEFAULTS  | |
| 
 Type:  | 
 Immediate  | 
| 
 Format:  | 
 AT [cmds] %J [cmds]  | 
| 
 Description:  | 
 Sets all S registers and AT commands to AT&F default except; S6=3s, range 3-255; S11=95ms, range 60-255; %L3, 6dBm; %D1, 2dBm.  | 
| 
 TEST MODES  | ||
| 
 Format  | 
 AT [cmds] S16=n [cmds]  | |
| 
 Default:  | 
 0  | |
| 
 Range:  | 
 0-125  | |
| 
 Unit:  | 
 Bit-mapped  | |
| 
 Description:  | 
 Controls loopback tests, analog, digital, remote digital, and self tests.  | |
| 
 Bit  | 
 Value  | 
 Function  | 
| 
 0  | 
 í 01  | 
 Local analog loopback not in progress Local analog loopback in progress  | 
| 
 1  | 
 í 0 | 
 Not used  | 
| 
 2  | 
 í 01  | 
 Local digital loopback not in progress Local digital loopback in progress  | 
| 
 3  | 
 í 01  | 
 Modem not in remote digital loopback Remote digital loopback in progress  | 
| 
 4  | 
 í 01  | 
 Remote digital loopback not in progress Remote digital loopback in progress  | 
| 
 5  | 
 í 01  | 
 Remote digital loopback w/ self-test not in progress Remote digital loopback w/ self-test in progress  | 
| 
 6  | 
 í 01  | 
 Local analog loopback w/ self-test not in progress Local analog loopback w/ self-test in progress  | 
| 
 TRANSMIT ATTENUATION  | |
| 
 Type:  | 
 Configuration  | 
| 
 Format:  | 
 AT [cmds] %Ln [cmds]  | 
| 
 Default:  | 
 0  | 
| 
 Range:  | 
 1-7  | 
| 
 Unit:  | 
 2 dBm  | 
| 
 Description:  | 
 Controls transmit attenuation  |