3COM CORPORATION
US ROBOTICS 33.6KBPS (INTERNAL)
US ROBOTICS VOICE 33.6KBPS (INTERNAL)
|
Card Type |
Modem |
|
Chip Set |
Unidentified |
|
I/O Options |
Line out, line in |
|
Maximum Modem Rate |
33.6Kbps |
|
Maximum Fax Rate |
14.4Kbps |
|
Data Modulation Protocol |
Bell 103A/212A, ITU-T V.21, V.22, V.22bis,V.32, V.32bis, V.34, V.FC |
|
Fax Modulation Protocol |
V.17, V.21, CH2, V.27ter, V.29 |
|
Error Correction/Compression |
MNP2-4, V.42 |
|
Fax Class |
Class I & II |
|
Data Bus |
8-bit ISA |
|
Card Size |
Half-length |
|
CONNECTIONS | ||||||
|
Function |
Label |
Function |
Label | |||
|
RJ-11 telephone in |
CN1 |
RJ-11 telephone out |
CN2 | |||
|
SERIAL PORT ADDRESS | |||
|
Setting |
JP1/A |
JP1/B |
JP1/C |
|
COM1 (3F8h) |
Closed |
Closed |
Closed |
|
COM2 (2F8h) |
Open |
Closed |
Closed |
|
COM3 (3E8h) |
Closed |
Open |
Closed |
|
COM4 (2E8h) |
Open |
Open |
Closed |
|
INTERRUPT | |||||
|
Setting |
JP2/A |
JP2/B |
JP2/C |
JP2/D |
JP2/E |
|
IRQ2 |
Closed |
Open |
Open |
Open |
Open |
|
IRQ3 |
Open |
Closed |
Open |
Open |
Open |
|
IRQ4 |
Open |
Open |
Closed |
Open |
Open |
|
IRQ5 |
Open |
Open |
Open |
Closed |
Open |
|
IRQ7 |
Open |
Open |
Open |
Open |
Closed |
|
SUPPORTED COMMAND SET |
|
Basic AT Commands |
|
AT, A/, +++ |
|
A, B, E, F, H, M, O, P, T, V |
|
&C, &G, &T, &W |
|
S Registers |
|
S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S18, S25, S38 |
|
Special Commands |
|
#CID |
|
Note: See MHI Help File for full command documentation. |
PROPRIETARY AT COMMAND SET
|
DIAL | |
|
Type: |
Immediate |
|
Format: |
AT [cmds] D<#> [cmds] |
|
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 |
|
DL |
Re-dial last number |
|
DP |
Pulse dialing enabled |
|
DR |
Answer mode enabled; originate mode disabled following handshake initiation. |
|
DS=n |
Dial stored telephone number n |
|
DT |
Tone dialing enabled/Pulse dialing disabled |
|
DW |
Dialing resumed following dial tone detection |
|
D, |
Dialing paused for amount of time specified in S8 register |
|
D"WXY" |
Optional method of denoting telephone numbers. Letters enclosed in quotes are interpreted as numbers according to the system found on a telephone keypad. |
|
D! |
Flash function initiated. Modem commanded to go off-hook for specified time before returning on-hook. |
|
D@ |
Wait for Quite Answer function enabled. Modem waits until a "quiet answer," a ring-back signal followed by silence up to the time specified in S7, is received prior to executing the rest of the dial string. |
|
D/ |
Delays 125 ms. Before proceeding with dial string |
|
D$ |
Displays list of commands |
|
D; |
Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command. |
|
REPORT INFORMATION | |
|
Type: |
Immediate |
|
Format: |
AT [cmds] In [cmds] |
|
Description: |
Displays information requested |
|
Command |
Function |
|
I0 |
Reports four digit product code |
|
I1 |
Reports ROM checksum |
|
I2 |
Reports RAM checksum |
|
I3 |
Reports product type |
|
I4 |
Reports current modem settings |
|
I5 |
Reports NVRAM settings |
|
I6 |
Reports data connection information |
|
I7 |
Reports manufacturer and model information |
|
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 |
|
RESULT CODES | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] Qn [cmds] |
|
Description: |
Enables modem to send result codes to the DTE |
|
Command |
Function |
|
í Q0 |
Result code sending enabled |
|
Q1 |
Result code sending disabled |
|
Q2 |
Result code sending only in originate mode |
|
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, 155 enabled. |
|
X1 |
Busy and dial tone detection disabled; result codes 0 - 5, 10, 13 - 155 enabled. |
|
X2 |
Busy tone detection disabled, dial tone detection enabled; result codes 0 - 6, 10, 13 - 155 enabled. |
|
X3 |
Busy tone detection enabled, dial tone detection disabled; result codes 0 - 5, 7, 8, 10, 13 - 155 enabled. |
|
X4 |
Busy and dial tone detection enabled; result codes 0 - 8, 10 - 155 enabled. |
|
LONG SPACE DISCONNECT | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] Yn [cmds] |
|
Description: |
Commands disconnection configuration |
|
Command |
Function |
|
í Y0 |
Profile 0 in NVRAM |
|
Y1 |
Profile 1 in NVRAM |
|
SOFT RESET | |
|
Type: |
Immediate |
|
Format: |
AT [cmds] Zn [cmds] |
|
Description: |
Restores modem profiles previously saved in non-volatile RAM using the &W command. |
|
Command |
Function |
|
Z0 |
Restore setting to profile selected by Y |
|
Z1 |
Restore setting NVRAM profile 0 |
|
Z2 |
Restore setting NVRAM profile 1 |
|
Z3 |
Restores setting to factory default profile 0 (&F0) |
|
Z4 |
Restores setting to factory default profile 1 (&F1) |
|
Z5 |
Restores setting to factory default profile 2 (&F2) |
|
AUTO-ANSWER - ORIGINATE/ANSWER | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &An [cmds] |
|
Description: |
Enables or disables additional result code subsets |
|
Command |
Function |
|
&A0 |
ARQ result codes disabled |
|
&A1 |
ARQ result codes enabled |
|
&A2 |
V.32 modulation indicator added |
|
í &A3 |
Protocol indicators added |
|
SERIAL PORT RATE | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &Bn [cmds] |
|
Description: |
Manages the serial port rate |
|
Command |
Function |
|
&B0 |
Variable, follows connection rate |
|
í &B1 |
Fixed serial port rate |
|
&B2 |
Fixed in ARQ mode, variable in non-ARQ mode |
|
DATA TERMINAL READY (DTR) | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &Dn [cmds] |
|
Description: |
Selects modem response to DTR |
|
Command |
Function |
|
í &D0 |
DTR override |
|
&D1 |
DTR toggle causes online command mode |
|
&D2 |
Normal DTR operations |
|
&D3 |
Resets on receipt of DTR |
|
FACTORY DEFAULT PROFILE | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &F [cmds] |
|
Description: |
Sets values in active profile to values found in the default profile |
|
Command |
Function |
|
&F0 |
Generic template |
|
í &F1 |
Hardware flow control template |
|
&F2 |
Software flow control template |
|
TRANSMIT DATA FLOW CONTROL | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &Hn [cmds] |
|
Description: |
Enables TD flow control options |
|
Command |
Function |
|
&H0 |
Flow control disabled |
|
&H1 |
CTS flow control enabled |
|
&H2 |
XON/XOFF flow control enabled |
|
&H3 |
Hardware and software flow control enabled |
|
RECEIVE DATA FLOW CONTROL | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &Hn [cmds] |
|
Description: |
Enables RD flow control options |
|
Command |
Function |
|
í &I0 |
Software flow control disabled |
|
&I1 |
XON/XOFF signals to modem and remote system |
|
&I2 |
XON/XOFF signals only to modem |
|
DATA COMPRESSION | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &Kn [cmds] |
|
Description: |
Enables/disables data compression |
|
Command |
Line Type |
|
&K0 |
Disable data compression |
|
&K1 |
Auto enable/disable |
|
&K2 |
Data compression enabled |
|
&K3 |
MNP5 compression disabled |
|
ERROR CONTROL | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &Mn [cmds] |
|
Description: |
Sets error control for connections at 1200bps and higher |
|
Command |
Mode |
|
&M0 |
Error control disabled |
|
&M4 |
Normal/ARQ mode. |
|
&M5 |
ARQ mode |
|
CONNECTION SPEED UPPER LIMIT | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &Nn [cmds] |
|
Description: |
Sets required connection speed if &U is set to 0; otherwise, sets fastest allowed connection speed. |
|
Command |
Function |
|
&N0 |
No maximum connect speed. |
|
&N1 |
Set maximum connect speed to 300bps. |
|
&N2 |
Set maximum connect speed to 1200bps. |
|
&N3 |
Set maximum connect speed to 2400bps. |
|
&N4 |
Set maximum connect speed to 4800bps. |
|
&N5 |
Set maximum connect speed to 7200bps. |
|
&N6 |
Set maximum connect speed to 9600bps. |
|
&N7 |
Set maximum connect speed to 12Kbps. |
|
&N8 |
Set maximum connect speed to 14.4Kbps. |
|
&N9 |
Set maximum connect speed to 16.8Kbps. |
|
&N10 |
Set maximum connect speed to 19.2Kbps. |
|
&N11 |
Set maximum connect speed to 21.6Kbps. |
|
&N12 |
Set maximum connect speed to 24Kbps. |
|
&N13 |
Set maximum connect speed to 26.4Kbps. |
|
&N14 |
Set maximum connect speed to 28.8Kbps. |
|
&N15 |
Set maximum connect speed to 31.2Kbps. |
|
&N16 |
Set maximum connect speed to 33.6Kbps. |
|
PULSE DIALING RATIO | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &Pn [cmds] |
|
Description: |
Selects pulse dial make/break ratio |
|
Command |
Function |
|
í &P0 |
39/61ms at 10pps (North America) |
|
&P1 |
33/67ms at 10pps (Europe) |
|
RTS | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &Rn [cmds] |
|
Description: |
Selects RTS/CTS options |
|
Command |
Function |
|
&R1 |
RTS ignored |
|
í &R2 |
Received data to computer only on RTS |
|
DATA SET READY (DSR) | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &Sn [cmds] |
|
Description: |
Selects DSR options |
|
Command |
Function |
|
&S0 |
DSR forced high |
|
&S1 |
DSR high only while modem is handshaking or connected |
|
CONNECTION SPEED LOWER LIMIT | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &Un [cmds] |
|
Description: |
Sets slowest allowed connection speed if &N is set to 1 or higher. |
|
Command |
Function |
|
í &U0 |
No minimum connect speed. |
|
&U1 |
Set minimum connect speed to 300bps. |
|
&U2 |
Set minimum connect speed to 1200bps. |
|
&U3 |
Set minimum connect speed to 2400bps. |
|
&U4 |
Set minimum connect speed to 4800bps. |
|
&U5 |
Set minimum connect speed to 7200bps. |
|
&U6 |
Set minimum connect speed to 9600bps. |
|
&U7 |
Set minimum connect speed to 12Kbps. |
|
&U8 |
Set minimum connect speed to 14.4Kbps. |
|
&U9 |
Set minimum connect speed to 16.8Kbps. |
|
&U10 |
Set minimum connect speed to 19.2Kbps. |
|
&U11 |
Set minimum connect speed to 21.6Kbps. |
|
&U12 |
Set minimum connect speed to 24Kbps. |
|
&U13 |
Set minimum connect speed to 26.4Kbps. |
|
&U14 |
Set minimum connect speed to 28.8Kbps. |
|
&U15 |
Set minimum connect speed to 31.2Kbps. |
|
&U16 |
Set maximum connect speed to 33.6Kbps. |
|
BREAK HANDLING | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &Yn [cmds] |
|
Description: |
Sets destructive/nondestructive break handling |
|
Command |
Function |
|
&Y0 |
Destructive, but doesn’t send break |
|
í &Y1 |
Destructive, expedited |
|
&Y2 |
Nondestructive, expedited |
|
&Y3 |
Nondestructive, unexpedited |
|
STORE TELEPHONE NUMBER | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &Zn=(phone # & modifiers) |
|
Description: |
Writes selected telephone numbers into the non-volatile memory at location n |
|
Command |
Function |
|
&Zn=s |
Writes phone number string s to NVRAM at position n |
|
&Zn=L |
Writes last executed dial string to NVRAM at position n (n=1-3) |
|
&Zn? |
Displays the phone number stored at position n (n=0-3) |
|
&ZL? |
Displays last executed dial string |
S(STATUS) -REGISTERS
|
BIT-MAPPED REGISTER S13 | ||
|
Format: |
AT [cmds] S13=n [cmds] | |
|
Range: |
0-174 | |
|
Unit: |
Bit-mapped | |
|
Description: |
Controls reset, dial mode | |
|
Bit |
Value |
Function |
|
0 |
0 1 |
Unidentified Resets when DTR drops |
|
1 |
0 1 |
Unidentified Resets non-MNP transmit buffer from 1.5K to 128bytes |
|
2 |
0 1 |
Unidentified Sets backspace key to delete |
|
3 |
0 1 |
Unidentified On DTR signal, auto dials number stared at NVRAM position 0 |
|
4 |
0 1 |
Unidentified At power on/reset, auto dials number stared at NVRAM position 0 |
|
5 |
0 |
Reserved |
|
6 |
0 |
Reserved |
|
7 |
0 1 |
Unidentified Disconnect on escape code |
|
BIT-MAPPED REGISTER S15 | ||
|
Format: |
AT [cmds] S15=n [cmds] | |
|
Unit: |
Bit-mapped | |
|
Description: |
Disable/Enable MNP | |
|
Bit |
Value |
Function |
|
0 |
0 1 |
Enable ARQ/MNP for V.22 Disable ARQ/MNP for V.22 |
|
1 |
0 1 |
Enable ARQ/MNP for V.22bis Disable ARQ/MNP for V.22bis |
|
2 |
0 1 |
Enable ARQ/MNP for V.32/V.32bis/V.32terbo Enable ARQ/MNP for V.32/V.32bis/V.32terbo |
|
3 |
0 1 |
Enable MNP handshake Disable MNP handshake |
|
4 |
0 1 |
Enable MNP level 4 Disable MNP level 4 |
|
5 |
0 1 |
Enable MNP level 3 Disable MNP level 3 |
|
6 |
0 1 |
MNP compatibility MNP incompatibility |
|
7 |
0 1 |
Enable V.42 operation Disable V.42 operation |
|
TEST MODES | ||
|
Type: |
Register | |
|
Format: |
AT [cmds] S16=n [cmds] | |
|
Unit: |
Bit-mapped | |
|
Description: |
Controls touch tone dialing test. | |
|
Bit |
Value |
Function |
|
0 |
0 |
Reserved |
|
2 |
0 1 |
Touch tone dialing test not in progress Touch tone dialing test in progress |
|
4 |
0 1 |
Internal test pattern not in use Internal test pattern in use |
|
INACTIVITY TIMER | |
|
Type: |
Register |
|
Format |
AT [cmds] S19=n [cmds] |
|
Range: |
0-255 |
|
Unit: |
10 seconds |
|
Description: |
Maximum duration of DTE and DCE inactivity allowed prior to initiating hang-up process. |
Note: S19=0 disables the timer and allows indefinite inactivity. | |
|
BREAK LENGTH | |
|
Type: |
Register |
|
Format |
AT [cmds] S21=n [cmds] |
|
Unit: |
10ms |
|
Description: |
Sets duration of breaks sent from the modem to the computer |
Note: Applies to MNP or V.42 mode only. | |
|
FLOW CONTROL CHARACTER - XON | |
|
Type: |
Register |
|
Format: |
AT [cmds] S22=n [cmds] |
|
Range: |
0-255 |
|
Unit: |
ASCII |
|
Description: |
Sets the character used to represent XON |
|
FLOW CONTROL CHARACTER - XOFF | |
|
Type: |
Register |
|
Format: |
AT [cmds] S23=n [cmds] |
|
Range: |
0-255 |
|
Unit: |
ASCII |
|
Description: |
Sets the character used to represent XOFF |
|
BIT-MAPPED REGISTER S27 | ||
|
Format |
AT [cmds] S27=n [cmds] | |
|
Range: |
0-255 | |
|
Unit: |
Bit-mapped | |
|
Description: |
Enables/disables modulation protocols | |
|
Bit |
Value |
Function |
|
0 |
0 1 |
Disable ITU-T modulation at 300bps for overseas calls: in V.21 mode, the modem answers both overseas and domestic calls, but only originates V.21 calls Enable ITU-T modulation at 300bps for overseas calls: in V.21 mode, the modem answers both overseas and domestic calls, but only originates V.21 calls |
|
1 |
0 1 |
Disable unencoded modulation in V.32 mode Enable unencoded modulation in V.32 mode |
|
2 |
0 1 |
Enable V.32 modulation Disable V.32 modulation |
|
3 |
0 1 |
Enable 2100Hz answer tone Disable 2100Hz answer tone |
|
4 |
0 1 |
Disable V.23 fallback mode Enable V.23 fallback mode |
|
5 |
0 1 |
Enable V.32bis mode Disable V.32bis mode |
|
6 |
0 1 |
Enable V.42 selective reject Disable V.42 selective reject |
|
7 |
0 1 |
Enable codes Disable codes and displays 900 code instead |
|
CONNECTION TIME | |
|
Type: |
Register |
|
Format |
AT [cmds] S28=n [cmds] |
|
Range: |
0-255 |
|
Unit: |
.01 second |
|
Description: |
Sets V.32 duration |
|
Command |
Function |
|
S28=0 |
Eliminates the V.32 answer tone for a faster connection |
|
S28=8 |
Times are in .1 second |
|
S28=255 |
Disable connections except V.32 at 9600bps |
|
FALLBACK TIMER | |
|
Type: |
Register |
|
Format |
AT [cmds] S29=n [cmds] |
|
Range: |
0-255 |
|
Unit: |
.01 second |
|
Description: |
Sets the duration of the V.21 answer mode fallback timer |
|
BIT-MAPPED REGISTER S32 | |||
|
Format: |
AT [cmds] S32=n [cmds] | ||
|
Range: |
0-255 | ||
|
Description: |
Select setup for 28.8 and higher speed modems | ||
|
Bit |
Value |
Function | |
|
0 |
0 1 |
Disable V.8 call indicate Enable V.8 call indicate | |
|
1 |
0 1 |
Disable V.8 mode Enable V.8 mode | |
|
2 |
0 |
Reserved | |
|
3 |
0 1 |
Enable V.34 modulation Disable V.34 modulation | |
|
4 |
0 1 |
Enable V.34+ modulation Disable V.34+ modulation | |
|
5-7 |
0 |
Reserved | |
|
BIT-MAPPED REGISTER S33 | |||
|
Format: |
AT [cmds] S33=n [cmds] | ||
|
Range: |
0-255 | ||
|
Description: |
Disable/enable data rates | ||
|
Bit |
Value |
Function | |
|
0 |
0 1 |
Enable 2400 symbol rate Disable 2400 symbol rate | |
|
1 |
0 1 |
Enable 2743 symbol rate Disable 2743 symbol rate | |
|
2 |
0 |
Enable 2800 symbol rate Disable 2800 symbol rate | |
|
3 |
0 1 |
Enable 3000 symbol rate Disable 3000 symbol rate | |
|
4 |
0 1 |
Enable 3200 symbol rate Disable 3200 symbol rate | |
|
5 |
0 1 |
Enable 3429 symbol rate Disable 3429 symbol rate | |
|
6 |
0 |
Reserved | |
|
7 |
0 1 |
Enable shaping Disable shaping | |
|
BIT-MAPPED REGISTER S34 | |||
|
Format: |
AT [cmds] S34=n [cmds] | ||
|
Range: |
0-255 | ||
|
Description: |
Disable/enable trellis encoding | ||
|
Bit |
Value |
Function | |
|
0 |
0 1 |
Enable 8S-2D trellis encoding Disable 8S-2D trellis encoding | |
|
1 |
0 1 |
Enable 16S-4D trellis encoding Disable 16S-4D trellis encoding | |
|
2 |
0 1 |
Enable 32S-2D trellis encoding Disable 32S-2D trellis encoding | |
|
3 |
0 1 |
Enable 64S-4D trellis encoding Disable 64S-4D trellis encoding | |
|
4 |
0 1 |
Enable non-linear coding Disable non-linear coding | |
|
5 |
0 1 |
Enable TX level deviation Disable TX level deviation | |
|
6 |
0 1 |
Enable pre-emphasis Disable pre-emphasis | |
|
7 |
0 1 |
Enable pre-coding Disable pre-coding | |
|
BIT-MAPPED REGISTER S35 | |||
|
Format: |
AT [cmds] S35=n [cmds] | ||
|
Range: |
0-255 | ||
|
Description: |
Limits back channel rate | ||
|
Bit |
Value |
Function | |
|
0-2 |
0 1 2 3 4 5 6 7 |
Back channel rate not limited 28800 max. 26400 max. 24000 max. 21600 max. 19200 max. 16800 max. 14400 max. | |
|
3 |
0 1 |
Normal RBS operation Forced RBS operation | |
|
4-7 |
0 1 |
Reserved Reserved | |
|
BIT-MAPPED REGISTER S41 | |||
|
Format: |
AT [cmds] S41=n [cmds] | ||
|
Range: |
0-255 | ||
|
Description: |
Enable/disable distinctive ring | ||
|
Bit |
Value |
Function | |
|
0 |
0 1 |
Disable distinctive ring Enable distinctive ring | |
|
1-7 |
9 |
Reserved | |
