3COM CORPORATION
AUTO LINK 1200
|
Card Type |
Modem (asynchronous) |
|
Chip Set |
U.S. Robotics |
|
Maximum Data Rate |
1200bps |
|
Data Bus |
External |
|
Data Modulation Protocol |
Bell 212A |
54166
|
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 | |||||
|
USER CONFIGURABLE SETTINGS | ||
|
Setting |
Label |
Position |
|
Auto answer disabled |
SW4/A |
Off |
|
Auto answer enabled |
SW4/A |
On |
|
Local echo disabled |
SW4/B |
Off |
|
Local echo enabled |
SW4/B |
On |
|
Equalize for dial-up phone lines |
SW4/C |
Off |
|
Equalize for dedicated phone lines |
SW4/C |
On |
|
DTR normal |
SW4/D |
Off |
|
DTR forced high |
SW4/D |
On |
|
RS232C | ||||
|
Setting |
SW5/A |
SW5/B |
SW5/C |
SW5/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 |
|
RI |
Red |
On |
Modem is receiving ring signal |
|
RI |
Red |
Off |
Modem is not receiving ring signal |
|
MISCELLANEOUS TECHNICAL NOTES |
Note: Diagram not available. |