3COM CORPORATION
US ROBOTICS 1200|
Modem Type |
Data (synchronous/asynchronous) |
|
Maximum Data Rate |
1200bps |
|
Data Bus |
External |
|
Data Modulation Protocol |
Bell 103A/212A |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Line out |
CN1 |
Power |
CN4 |
|
Line in |
CN2 |
Volume |
SW3 |
|
RS-232/422 |
CN3 |
Power |
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 |
| » Verbose result codes enabled |
On |
| Numeric result codes enabled |
Off |
|
RESULT CODES DISPLAY | |
| Setting |
SW1/3 |
| » Display enabled |
On |
| Display disabled |
Off |
|
ECHO COMMANDS DISPLAY | |
| Setting |
SW1/4 |
| » Local echo enabled |
Off |
| Local echo disabled |
On |
|
AUTO ANSWER | |
| Setting |
SW1/5 |
| » Modem doe not answer on first ring |
On |
| Modem answers on first ring |
Off |
|
CARRIER DETECT | |
| Setting |
SW1/6 |
| » CD normal |
Off |
| CD forced high |
On |
|
MULT-LINE INSTALLATION | |
| Setting |
SW1/7 |
| » Single phone connected |
Off |
| Multiple phones connected |
On |
|
AT COMMAND SET | |
| Setting |
SW1/8 |
| » AT command set recognized |
On |
| AT command set disabled |
Off |
Proprietary AT Command Set
|
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. |