U.S. ROBOTICS, INC.
COURIER 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 | CN2 | DC power | CN4 |
Line in | CN1 | Power switch | SW1 |
RS-232/422 | CN3 |
DTR SIGNAL | |
Setting | SW2/1 |
» On | DTR forced high |
Off | DTR normal |
RESULT CODES | |
Setting | SW2/2 |
» Off | Verbal result codes enabled |
On | Numeric result codes enabled |
RESULT CODES DISPLAY | |
Setting | SW2/3 |
» On | Display enabled |
Off | Display disabled |
ECHO COMMANDS DISPLAY | |
Setting | SW2/4 |
» Off | Local echo enabled |
On | Local echo disabled |
AUTO ANSWER | |
Setting | SW2/5 |
» On | Modem does not answer on first ring |
Off | Modem answers on first ring |
CARRIER DETECT | |
Setting | SW2/6 |
Off | CD normal |
» On | CD forced high |
MULTILINE PHONE INSTALLATION | |
Setting | SW2/7 |
» Off | Single phone connected |
On | Multiple phones connected |
AT COMMAND SET | |
Setting | SW2/8 |
» On | AT command set recognized |
Off | AT command set disabled |
ESCAPE CODE | |
Setting | SW2/9 |
» On | Go to command mode and display OK result code when escape character is received |
Off | Disconnect, go to command mode and display NO CARRIER when escape character is received |
DTR RESET | |
Setting | SW2/10 |
» Off | DTR normal |
On | Reset 50ms after receiving DTR low signal. |
TX/RX PIN ASSIGNMENT | |
Setting | SW3 |
» Off | Normal operation |
On | Reverse TX/RX pin assignments |
DIAGNOSTIC LED(S) | |||
LED | Color | Status | Condition |
HS | Red | On | Modem is operating at 4800bps or faster |
HS | Red | Off | Modem is operating at slower than 4800bps |
AA | Red | On | Auto-answer enabled |
AA | Red | Off | Auto-answer disabled |
CD | Red | On | Carrier signal detected |
CD | Red | Off | Carrier signal not detected |
OH | Red | On | Modem is off-hook |
OH | Red | Off | Modem is on-hook |
RD | Red | On | Modem is receiving data |
RD | Red | Off | Modem is not receiving data |
TD | Red | On | Modem is transmitting data |
TD | Red | Off | Modem is not transmitting data |
TR | Red | On | DTR signal is high |
TR | Red | Off | DTR signal is low |
MR | Red | On | Power is on |
MR | Red | Off | Power is off |
AL | Red | On | Analog loopback self test mode |
AL | Red | Off | Normal operation |
Proprietary AT Command Set
See document V1254 for a full command summary.