U.S. ROBOTICS, INC.
COURIER V.32/PC
Card Type | Modem (asynchronous) |
Chip Set | U.S. Robotics |
Maximum Data Rate | 14.4Kbps |
Data Bus | Unidentified |
Data Modulation Protocol | Unidentified |
Error Correction/Compression | Unidentified |
V1985
USER CONFIGURABLE SETTINGS | ||
Setting | Label | Position |
í DTR normal | SW1/1 | Off |
DTR forced high | SW1/1 | On |
í Verbal result codes | SW1/2 | Off |
Numeric result codes | SW1/2 | On |
í Enable result codes displayed | SW1/3 | On |
Disable result codes displayed | SW1/3 | Off |
í Local echo enabled | SW1/4 | Off |
Local echo disabled | SW1/4 | On |
í Auto answer disabled | SW1/5 | On |
Auto answer enabled | SW1/5 | Off |
í CD signal normal | SW1/6 | Off |
CD signal forced high | SW1/6 | On |
í Display result codes in originate and answer mode | SW1/7 | Off |
Display result codes in originate mode only | SW1/7 | On |
í Smart mode enabled | SW1/8 | On |
Dumb mode enabled | SW1/8 | Off |
í Normal operation enabled | SW1/9 | On |
Escape sequence enabled | SW1/9 | Off |
í Restore NVRAM defaults | SW1/10 | Off |
Restore factory defaults | SW1/10 | On |
Proprietary AT Command Set
ABORT | |
Type: | Immediate |
Format: | Any key |
Description: | Aborts answering/originating a call; modem hangs up. |
ANSWER | |
Type: | Immediate |
Format: | AT [cmds] A |
Description: | Enables manual answer mode, the modem goes off-hook; pressing any key will abort. |
ANSWER SEQUENCE | |
Type: | Configuration |
Format: | AT [cmds] Bn [cmds] |
Description: | Selects the answer sequence the modem will use |
Command | Function |
í B0 | V.32 mode/ITU-T answer sequence enabled |
B1 | HST mode/Bell answer tone enabled |
ATTENTION | |
Type: | Immediate |
Format: | AT [cmds] |
Description: | Tells the modem that a command follows or use alone to test OK result code |
BIT-MAPPED REGISTER S13 | ||
Format | AT [cmds] S13=n [cmds] | |
Default: | 0 | |
Range: | 0-255 | |
Unit: | Bit-mapped | |
Description: | Controls DTR reset, DTR dialing, reset dialing, HST modulation, and MNP3. | |
Bit | Value | Function |
0 | í 01 | DTR normal Reset on low DTR |
1 | í 01 | Normal auto answer operation When ring is received, enter originate and listen for answer tone |
2 | í 01 | Pause 250msec. Before displaying result codes Immediate result code display |
3 | í 01 | DTR dialing disabled DTR dialing enabled |
4 | í 01 | Reset dialing disabled Reset dialing enabled |
5 | í 01 | HST modulation enabled HST modulation disabled |
6 | í 01 | MNP 3 enabled MNP 3 disabled |
7 | í 01 | Hardware reset disabled Hardware reset enabled |
BIT-MAPPED REGISTER S15 | ||
Format: | AT [cmds] S15=n [cmds] | |
Default: | 0 | |
Range: | 0-255 | |
Unit: | Bit-mapped | |
Description: | Controls HST high frequency equalization, online fallback, back channel, non-error-correcting mode buffer, MNP4, custom applications and MNP compliance. | |
Bit | Value | Function |
0 | í 01 | HST high frequency equalization enabled HST high frequency equalization disabled |
1 | í 01 | Online fallback enabled Online fallback disabled |
2 | í 01 | 300bps back channel enabled 300bps back channel disabled |
3 | í 01 | Non-error-correcting mode transmit buffer set to 1.5KB Non-error-correcting mode transmit buffer set to 128 bytes |
4 | í 01 | MNP 4 enabled MNP 4 disabled |
5 | í 01 | Custom applications only Custom applications only |
6 | í 01 | MNP normal MNP adjusted for non compliant modems |
BIT-MAPPED REGISTER S27 | ||
Format: | AT [cmds] S27=n [cmds] | |
Default: | 0 | |
Range: | 0-191 | |
Unit: | Bit-mapped | |
Description: | Controls V.21, V.32 encoding and modulation, and high speed rate shift | |
Bit | Value | Function |
0 | í 01 | V.21 disabled V.21 enabled |
1 | í 01 | V.32 non-trellis coding disabled V.32 non-trellis coding enabled |
2 | í 01 | V.32 modulation enabled V.32 modulation disabled |
3 - 5 | í 000 | Not used |
6 | í 01 | 19.2Kbps enabled. High speed rate shift needs to be enabled. 38.4Kbps enabled. High speed rate shift needs to be enabled. |
7 | í 01 | High speed rate shift disabled High speed rate shift enabled |
BREAK LENGTH | |
Type: | Register |
Format: | AT [cmds] S21=n [cmds] |
Default: | 10 |
Range: | 0-255 |
Unit: | 10 ms |
Description: | Sets the length of error control mode breaks sent from DCE to DTE |
CLOCK | ||
Type: | Configuration | |
Format: | AT [cmds] Kn [cmds] | |
Description: | Displays connection duration or real time | |
Command | Function | |
í K0 | Connection duration displayed in ATI3 | |
K1 | Real time displayed in ATI3. To set clock (military time) use ATI3=HH:MM:SSK1. |
DATA SET READY (DSR) | |
Type: | Configuration |
Format: | AT [cmds] &Sn [cmds] |
Description: | Selects DSR options |
Command | Function |
í &S0 | DSR forced high |
&S1 | DSR controlled by modem |
&S2 | DSR toggled, CTS follows CD |
&S3 | DSR toggled |
DIAL | |
Type: | Immediate |
Format: | AT [cmds] D<#> [cmds] |
Example: | ATDT 443-3388,,,1111; |
Description: | Dials telephone number according to any modifiers included in the string |
Note: | Any combination of modifiers can be used to produce the desired dial functions in sequence. |
Command | Function |
í P | Pulse dialing enabled |
T | Tone dialing enabled |
, | Dialing paused for 2 seconds |
; | Modem returned to command state after dialing. Can only be placed at the end of the dial command. |
" | Dials letters as if they were numbers; ATDT"GOMICRO" |
! | Flash function initiated |
@ | Dial, wait for quiet answer, then continue to execute the rest of the dial string |
W | Dial, wait for second dial tone, then continue to execute the rest of the dial string |
R | Answer mode enabled; originate mode disabled following handshake initiation. |
DIAL - STORED NUMBER | |
Type: | Immediate |
Format: | AT [cmds] DSn [cmds] |
Description: | Dial stored number from memory location n |
DISCONNECT BUFFER DELAY | |
Type: | Register |
Format | AT [cmds] S38=n [cmds] |
Default: | 0 |
Range: | 0-255 |
Unit: | 1 second |
Description: | Sets maximum duration allowed during buffered data calls for modem to perform clearing functions after losing carrier-signal or receiving a clear call signal from the remote modem and before initiating hang-up process. |
DSR DELAY | |
Type: | Register |
Format: | AT [cmds] S24=n [cmds] |
Default: | 25 |
Range: | 0-255 |
Unit: | .1 second |
Description: | Sets the length of the DSR pulse signal |
ECHO | |
Type: | Configuration |
Format: | AT [cmds] En [cmds] |
Description: | Controls echo function; display keyboard commands when enabled. |
Command | Function |
E0 | Echo function disabled |
E1 | Echo function enabled |
ECHO - ON-LINE | |
Type: | Configuration |
Format: | AT [cmds] Fn [cmds] |
Description: | Selects whether data sent while in data mode are echoed |
Command | Function |
F0 | Local echo enabled |
í F1 | Local echo disabled |
ESCAPE SEQUENCE | |
Type: | Immediate |
Format: | +++AT [cmds] <CR> |
Description: | Initiates the escape sequence and returns the modem to the on-line command state if it receives three escape characters set in S2 within the time allotted by S12. |
Note: Do not precede this command with AT. |
FLOW CONTROL CHARACTER - XOFF | |
Type: | Register |
Format: | AT [cmds] S23=n [cmds] |
Default: | 19 |
Range: | 11-127 |
Unit: | ASCII |
Description: | Sets the character used to represent XOFF |
FLOW CONTROL CHARACTER - XON | |
Type: | Register |
Format: | AT [cmds] S22=n [cmds] |
Default: | 17 |
Range: | 11-127 |
Unit: | ASCII |
Description: | Sets the character used to represent XON |
FLOW CONTROL TYPE | |
Type: | Configuration |
Format: | AT [cmds] &Hn [cmds] |
Description: | Sets type of flow control used by modem |
Command | Function |
í &H0 | Flow control disabled |
&H1 | CTS/RTS flow control enabled |
&H2 | XON/XOFF flow control enabled |
&H3 | CTS/RTS and XON/XOFF flow control enabled |
FLOW CONTROL TYPE | |
Type: | Configuration |
Format: | AT [cmds] &Rn [cmds] |
Description: | Controls receive data hardware flow control and RTS signals |
Command | Function |
&R0 | Delay CTS after RTS. See S26 on length of time. |
&R1 | Modem ignores RTS |
í &R2 | Received data to DTE when RTS is on |
FLOW CONTROL PASSTHROUGH | |
Type: | Configuration |
Format: | AT [cmds] &In [cmds] |
Description: | Allows modem to act on, then transmit XON/XOFF characters. |
Command | Function |
í &I0 | Software flow control disabled |
&I1 | XON/XOFF passthrough enabled |
&I2 | XON/XOFF passthrough disabled |
&I3 | ENQ/ACK enabled in host mode |
&I4 | ENQ/ACK enabled in terminal mode |
&I5 | XON/XOFF passthrough disabled in error correction mode |
GUARD TONE | |
Type: | Configuration |
Format: | AT [cmds] &Gn [cmds] |
Description: | Commands the modem to transmit a guard tone |
Note: Used primarily for international data transmission | |
Command | Function |
í &G0 | Guard tone disabled |
&G1 | 550Hz guard tone enabled |
&G2 | 1800Hz guard tone enabled |
HOOK CONTROL | |
Type: | Immediate |
Format: | AT [cmds] Hn [cmds] |
Description: | Selects whether the modem is on-hook or off-hook |
Command | Function |
H0 | Modem commanded to go on-hook (hang-up) |
H1 | Modem commanded to go off-hook (pick-up) |
LIST AMPERSAND COMMANDS | |
Type: | Immediate |
Format: | AT [cmds] &$ [cmds] |
Description: | Displays ampersand (&) commands |
LIST DIAL COMMANDS | |
Type: | Immediate |
Format: | AT [cmds] D$ [cmds] |
Description: | Displays dial commands |
LIST S-REGISTERS | |
Type: | Immediate |
Format: | AT [cmds] S$ [cmds] |
Description: | Displays the S-registers |
ON-LINE | |
Type: | Immediate |
Format: | AT [cmds] O [cmds] |
Description: | Returns to on-line command (data transmission) mode. |
Note: The O command must be placed at the end of the command string. |
ON-LINE HELP | |
Type: | Immediate |
Format: | AT [cmds] $ [cmds] |
Description: | On-line help; displays basic command list. |
PAUSE | |
Type: | Immediate |
Format: | AT [cmds] / (slash) [cmds] |
Description: | 125 msec delay before proceeding with dial string or command |
PULSE DIALING | |
Type: | Configuration |
Format: | AT [cmds] P [cmds] |
Description: | Enables pulse dialing |
Note: This command can be duplicated with the P modifier in the D (Dial) command. |
PULSE DIALING RATIO | |
Type: | Configuration |
Format: | AT [cmds] &Pn [cmds] |
Description: | Selects pulse dial make/break ratio |
Command | Function |
&P0 | 39/61ms at 10pps (North America) |
&P1 | 33/67ms at 10pps (Europe) |
RECEIVE-ONLY | ||
Type: | Configuration | |
Format: | AT [cmds] Cn [cmds] | |
Description: | Sets receive-only; used if modem is attached to additional monitoring-only systems | |
Command | Function | |
C0 | Disables transmitter | |
í C1 | Enables transmitter |
REPEAT COMMAND STRING | |
Type: | Configuration |
Format: | AT [cmds] > [cmds] |
Example: | AT>DT5551212 or ATDT5551212> |
Description: | Causes modem to repeat command string until a keyboard key is pressed |
Note: If used before or after the ATD command, the modem will redial the number until a connection is established or a maximum of ten attempts is reached. |
REPEAT PREVIOUS COMMAND | |
Type: | Immediate |
Format: | A/ |
Description: | Repeats previous command; mainly used for redial. |
Note: Do not precede this command with AT, or follow it with <CR>. |
RTS/CTS DELAY | |
Type: | Register |
Format: | AT [cmds] S26=n [cmds] |
Default: | 1 |
Range: | 0-255 |
Unit: | .1 second |
Description: | Sets the length of time between RTS and CTS |
REPORT INFORMATION | |
Type: | Immediate |
Format: | AT [cmds] In [cmds] |
Description: | Displays information requested |
Command | Function |
I0 | Reports product code |
I1 | Reports ROM checksum |
I2 | Reports RAM checksum |
I3 | Reports connection duration and real time |
I4 | Reports current command settings |
I5 | Reports NVRAM settings |
I6 | Reports link diagnostics |
I7 | Reports product configuration |
RESULT CODES | |
Type: | Configuration |
Format: | AT [cmds] Qn [cmds] |
Description: | Enables modem to send result codes to the DTE |
Command | Function |
Q0 | Result code sending enabled |
Q1 | Result code sending disabled |
RESULT CODE FORMAT | |
Type: | Configuration |
Format: | AT [cmds] Vn [cmds] |
Description: | Selects word or numeric format for information-text and result codes |
Command | Function |
V0 | Numeric format enabled |
V1 | Verbose (word) format enabled |
SELECT CALL PROGRESS RESULT CODES | |
Type: | Configuration |
Format: | AT [cmds] Xn [cmds] |
Description: | Enables selection of tone detection and associated result code format options |
Command | Function |
X0 | Busy and dial tone detection disabled; result codes 0-4 enabled. |
í X1 | Busy and dial tone detection disabled; result codes 0-5, 10, 13, and 18 enabled |
X2 | Busy tone detection disabled, dial tone detection enabled; result codes 0-6, 10, 13, and 18 enabled; also adaptive dialing, and fast dialing enabled. |
X3 | Busy tone detection enabled, dial tone detection disabled; result codes 0-5, 7-18 enabled; also adaptive dialing, wait for second dial tone, and wait for answer enabled. |
X4 | Busy and dial tone detection enabled; result codes 0-10, 13, and 18 enabled; also adaptive dialing, wait for second dial tone, wait for answer, and fast dialing enabled. |
X5 | Busy tone detection enabled, dial tone detection disabled; result codes 0-5, 7-18 enabled; also adaptive dialing, wait for second dial tone, and wait for answer enabled. |
X6 | Busy and dial tone detection enabled; result codes 0-18 enabled; also adaptive dialing, wait for second dial tone, wait for answer, and fast dialing enabled. |
X7 | Busy and dial tone detection enabled; result codes 0-11, 13, and 18 enabled; also adaptive dialing, wait for second dial tone, wait for answer, and fast dialing enabled. |
Note: Valid numeric result codes; 0-8, 10-13, and 18. |
SOFT RESET | |
Type: | Immediate |
Format: | AT [cmds] Z [cmds] |
Description: | Restores modem software default profile |
SPEAKER MODE | |
Type: | Configuration |
Format: | AT [cmds] Mn [cmds] |
Description: | Selects various speaker options |
Command | Function |
M0 | Speaker disabled |
í M1 | Speaker enabled until carrier signal detected |
M2 | Speaker enabled |
M3 | Speaker enabled following dialing, then disabled after carrier signal detected. |
SPEAKER VOLUME | |
Type: | Configuration |
Format: | AT [cmds] Ln [cmds] |
Description: | Controls speaker volume |
Command | Function |
L0 | Low volume setting |
L1 | Low volume setting |
í L2 | Medium volume setting |
L3 | Highest volume setting |
STATUS-REGISTER | ||
Type: | Configuration | |
Format: | Read: AT [cmds] Sn? [cmds] Write: AT [cmds] Sn=x [cmds] | |
Description: | Writes to or reads from a specified register | |
Command | Function | |
Sn.b=x | Write to register bit b using values 0 (off) and 1 (on) for x |
TEST MODES | ||
Type: | Configuration | |
Format: | AT [cmds] S16=n [cmds] | |
Description: | Controls loopback tests, analog, digital, remote digital, and self tests. | |
Command | Function | |
S16=0 | Testing disabled | |
S16=1 | Local digital loopback enabled | |
S16=2 | Dial test (Factory testing only) | |
S16=4 | Test pattern enabled (transmitted on CONNECT, either on answering or originate) | |
S16=5 | Local analog loopback and test pattern enabled | |
S16=8 | Remote digital loopback enabled |
TONE DIALING | |
Type: | Configuration |
Format: | AT [cmds] T [cmds] |
Description: | Enables tone dialing mode |
Note: This command can be duplicated with the T modifier in the D (Dial) command. |
V.32 - HANDSHAKE TIME | |
Type: | Register |
Format: | AT [cmds] S28=n [cmds] |
Default: | 8 |
Range: | 0-255 |
Unit: | .1 second |
Description: | Sets length of V.32 handshake |