MEGAHERTZ CORPORATION
A2144
|
Modem Type |
Data (synchronous/asynchronous)/Fax |
|
Maximum Data Rate |
14.4Kbps |
|
Maximum Fax Rate |
14.4Kbps |
|
Data Bus |
PCMCIA Type II |
|
Fax Class |
Class II |
|
Data Modulation Protocol |
Bell 103A/212A ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32b, V.32bis |
|
Fax Modulation Protocol |
ITU-T V.17, V.21CH2, V.27ter, V.29 |
|
Error Correction/Compression |
MNP10, MNP5, V.42, V.42bis |
V1283
Proprietary AT Command Set
|
BIT-MAPPED REGISTER S14 | |||
|
Format |
AT [cmds] S14=n [cmds] | ||
|
Example: |
ATS14=138 <CR> | ||
|
Default: |
138 | ||
|
Range: |
0 - 174 | ||
|
Unit: |
Bit-mapped | ||
|
Description: |
Controls echo, result codes, result code display, dial mode, and answer/originate mode. | ||
|
Bit | Value |
Function | |
|
0 | 0 |
Not used. | |
|
1 | 0 1 |
Command echo disabled. Command echo enabled. | |
|
2 | 0 1 |
Result codes enabled. Result codes disabled. | |
|
3 | 0 1 |
Display result codes in numeric format. Display result codes in verbose format. | |
|
4 | 0 |
Not used. | |
|
5 | 0 1 |
Tone dial enabled. Pulse dial enabled. | |
|
6 | 0 |
Not used. | |
|
7 | 0 1 |
Answer mode enabled. Originate mode enabled. | |
|
BIT-MAPPED REGISTER S21 | |||
|
Format |
AT [cmds] S21=n [cmds] | ||
|
Example: |
AT S21=169 <CR> | ||
|
Default: |
4 | ||
|
Range: |
0 - 253 | ||
|
Unit: |
Bit-mapped | ||
|
Description: |
Controls jack type, CTS signal, low DTR action, DCD signal, DSR signal, and the Long Space Disconnect function. | ||
|
Bit | Value |
Function | |
|
0 | 0 1 |
Selects RJ-11, RJ-41S, or RJ45S jack. Selects RJ-12 or RJ-13 jack. | |
|
1 | 0 |
Not used. | |
|
2 | 0 1 |
CTS follows RTS. CTS forced high. | |
|
4, 3 | 00 01 10 11 |
DTR signal ignored. Modem goes to command mode on low DTR. Modem disconnects on low DTR. Auto-Answer is disabled. Modem is initialized on low DTR. | |
|
5 | 0 1 |
DCD forced high. DCD normal. | |
|
6 | 0 1 |
DSR forced high. DSR normal. | |
|
7 | 0 1 |
Long Space Disconnect function disabled. Long Space Disconnect function enabled. | |
|
BIT-MAPPED REGISTER S22 | |||
|
Format |
AT [cmds] S22=n [cmds] | ||
|
Example: |
AT S22=89 <CR> | ||
|
Default: |
117 | ||
|
Range: |
0 - 127 | ||
|
Unit: |
Bit-mapped | ||
|
Description: |
Controls speaker volume and controls, and result codes. | ||
|
Bit | Value |
Function | |
|
1, 0 | 00 01 10 11 |
Off volume. Low volume. Medium level volume. High level volume. | |
|
3, 2 | 00 01 10 11 |
Speaker off. Speaker off on carrier. Speaker always on. Speaker on during handshake. | |
|
6, 5, 4 | 000 100 101 110 111 |
Basic result codes only enabled. Basic and connection speed result codes enabled. Basic and connection speed result codes and dialtone detection enabled. All result codes except dialtone detection enabled. All result codes enabled. | |
|
BIT-MAPPED REGISTER S23 | |||
|
Format |
AT [cmds] S23=n [cmds] | ||
|
Example: |
ATS23=152 <CR> | ||
|
Default: |
183 | ||
|
Range: |
0 - 255 | ||
|
Unit: |
Bit-mapped | ||
|
Description: |
Grants/denies remote digital loopback, controls DTE rate and parity, and sets guard tone. | ||
|
Bit | Value |
Function | |
|
0 | 0 1 |
Remote digital loopback denied. Remote digital loopback allowed. | |
|
3, 2, 1 | 000 001 010 011 100 101 110 |
Sets serial port speed to 0-300bps. Sets serial port speed to 600bps. Sets serial port speed to 1200bps. Sets serial port speed to 2400bps. Sets serial port speed to 4800bps. Sets serial port speed to 9600bps. Sets serial port speed to 19200bps. | |
|
5,4 | 00 01 10 11 |
Parity even. Not used. Parity odd. No parity. | |
|
7, 6 | 00 01 10 |
Guard tone disabled. Guard tone disabled. Guard tone 1800Hz enabled. | |
|
BIT-MAPPED REGISTER S27 | |||
|
Format |
AT [cmds] S27=n [cmds] | ||
|
Example: |
AT S27=8 <CR> | ||
|
Default: |
9 | ||
|
Range: |
0 - 127 | ||
|
Unit: |
Bit-mapped | ||
|
Description: |
Controls connection mode, line type, internal clock, and protocols. | ||
|
Bit | Value |
Function | |
|
3, 1, 0 | 000 001 101 110 |
Asynchronous mode, serial port speed follows connect speed. Asynchronous off-line command mode and synchronous connect mode. Error-correcting mode. Asynchronous mode, serial port speed locked. | |
|
2 | 0 1 |
Dial up line. Leased line. | |
|
5, 4 | 00 01 10 |
Internal DTE transmit clock source. External DTE transmit clock source. Slave DTE transmit clock source. | |
|
6 | 0 1 |
ITU-T protocols. Bell protocols. | |
|
BIT-MAPPED REGISTER S28 | |||
|
Format |
AT [cmds] S28=n [cmds] | ||
|
Example: |
AT S28=8 <CR> | ||
|
Default: |
0 | ||
|
Range: |
0 - 31 | ||
|
Unit: |
Bit-mapped | ||
|
Description: |
Controls V.23 split speed, V.23 split screen, V.23 half duplex, and pulse dialing. | ||
|
Bit | Value |
Function | |
|
0 | 0 1 |
V.23 split speed operation disabled. V.23 split speed operation enabled. | |
|
1 | 0 1 |
Select 75bps transmit, 1200bps receive. Select 1200bps transmit, 75bps receive. | |
|
2 | 0 1 |
1200bps transmit , 1200bps receive disabled. 1200bps transmit , 1200bps receive enabled. | |
|
4, 3 | 00 01 10 11 |
39ms make/61ms break at 10pps. 33ms make/67ms break at 10pps. 39ms make/61ms break at 20pps. 33ms make/67ms break at 20pps. | |
|
BIT-MAPPED REGISTER S31 | |||
|
Format |
AT [cmds] S31=n [cmds] | ||
|
Example: |
AT S31=69 <CR> | ||
|
Default: |
0 | ||
|
Range: |
0 - 255 | ||
|
Unit: |
Bit-mapped | ||
|
Description: |
Controls auto-baud function and result codes. | ||
|
Bit | Value |
Function | |
|
0 | 0 |
Not used. | |
|
1 | 0 1 |
Auto-baud disabled. Auto-baud enabled. | |
|
2 | 00 01 10 |
DTE speed displayed in result codes. Extended result codes enabled and DCE speed displayed in result codes. DCE speed displayed in result codes. | |
|
BIT-MAPPED REGISTER S40 | |||
|
Format |
AT [cmds] S40=n [cmds] | ||
|
Example: |
AT S40=155 <CR> | ||
|
Default: |
105 | ||
|
Range: |
0 - 255 | ||
|
Unit: |
Bit-mapped | ||
|
Description: |
Controls power level and break handling, MNP10, link negotiation, and block size. | ||
|
Bit | Value |
Function | |
|
0 |
í 0 1 |
MNP10 disabled. MNP10 enabled. | |
|
1 | 0 1 |
Power level adjustment enabled. Power level adjustment disabled. | |
|
2 | 0 1 |
Link will be negotiated at highest possible speed. Link will be negotiated at 1200bps. | |
|
5, 4, 3 | 000 001 010 011 100 101 |
Selects \K0. Selects \K1. Selects \K2. Selects \K3. Selects \K4. Selects \K5. | |
|
7, 6 | 00 01 10 11 |
MNP block size is 64 characters. MNP block size is 128 characters. MNP block size is 192 characters. MNP block size is 256 characters. | |
|
BIT-MAPPED REGISTER S41 | |||
|
Format |
AT [cmds] S41=n [cmds] | ||
|
Example: |
AT S41=18 <CR> | ||
|
Default: |
3 | ||
|
Range: |
0 - 31 | ||
|
Unit: |
Bit-mapped | ||
|
Description: |
Selects compression, auto-retrain, flow control, and MNP mode. | ||
|
Bit | Value |
Function | |
|
1 - 0 | 00 01 10 11 |
Data compression disabled. MNP5 enabled. V.42bis enabled. MNP5 and V.42bis enabled. | |
|
2 | 0 1 |
Auto-retrain disabled. Auto-retrain enabled. | |
|
3 | 0 1 |
Flow control disabled. Flow control enabled. | |
|
4 | 0 1 |
Stream mode for MNP. Block mode for MNP. | |
|
BIT-MAPPED REGISTER S80 | |||
|
Format |
AT [cmds] S80=n [cmds] | ||
|
Example: |
AT S80=223 < CR> | ||
|
Default: |
0 | ||
|
Range: |
0 - 224 | ||
|
Unit: |
Bit-mapped | ||
|
Description: |
Controls command sets, remote configuration, and call back security. Also accesses EPROM data lines. | ||
|
Bit | Value |
Function | |
|
0 - 4 | N/A |
EPROM data lines. | |
|
5 | 0 1 |
AT command set enabled. V.25bis command set enabled. | |
|
6 | 0 1 |
Remote configuration disabled. Remote configuration enabled. | |
|
7 | 0 1 |
Call back security disabled. Call back security enabled. | |
|
BREAK SEND | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] \Bn [cmds] |
|
Example: |
AT \B3 &W <CR> |
|
Range: |
1 - 9 |
|
Unit: |
.1 Second |
|
Description: |
Sends break to modem. |
|
BREAK TYPE | ||||
|
Type: |
Configuration | |||
|
Format: |
AT [cmds] \Kn [cmds] | |||
|
Example: |
AT \K1 <CR> | |||
|
Description: |
Configures action of break signal. | |||
|
Command |
Break from DTE |
Modem receives \B |
Break received from remote modem | |
|
\K0 |
Online command mode enabled, send no break to remote modem. |
Break sent to remote modem and buffered cleared. |
Buffers cleared, break sent to DTE. | |
|
\K1 |
Break sent to remote modem and buffered cleared. |
Break sent to remote modem and buffered cleared. |
Buffers cleared, break sent to DTE. | |
|
\K2 |
Online command mode enabled, send no break to remote modem. |
Send break to remote modem immediately. |
Break sent immediately to DTE. | |
|
\K3 |
Send break to remote modem immediately. |
Send break to remote modem immediately. |
Break sent immediately to DTE. | |
|
\K4 |
Online command mode enabled, send no break to remote modem. |
Send break with transmitted data. |
Break sent with received data to the DTE. | |
|
\K5 |
Send break with transmitted data. |
Send break with transmitted data. |
Break sent with received data to the DTE. | |
|
CONFIGURATION PROFILES | |
|
Type: |
Immediate |
|
Format: |
AT [cmds] \Sn [cmds] |
|
Example: |
AT\S0 <CR> |
|
Description: |
Displays active configuration profiles. |
|
CONNECT MODE | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] \Nn [cmds] |
|
Example: |
AT \N3 DT555-1212 <CR> |
|
Description: |
Sets connect mode. |
|
Command |
Function |
|
\N0 |
Normal mode enabled. |
|
\N2 |
Reliable mode enabled. |
|
\N3 |
Auto-reliable mode enabled. |
|
\N4 |
LAPM mode enabled. |
|
\N5 |
MNP mode enabled. |
|
DISPLAY STORED NUMBERS | |
|
Type: |
Immediate |
|
Format: |
AT [cmds] \Fn [cmds] |
|
Example: |
AT \F2=9W1-303-555-1212 \F? <CR> |
|
Description: |
Displays all stored phone numbers. |
|
ERROR CORRECTION REJECTION | |||
|
Format |
AT [cmds] S36=n [cmds] | ||
|
Example: |
AT S36=3 <CR> | ||
|
Default: |
7 | ||
|
Range: |
0 - 7 | ||
|
Unit: |
Bit-mapped | ||
|
Description: |
Configures the modems behavior if an error-correcting connection cannot be made. | ||
|
Bit | Value |
Function | |
|
0 - 2 | 000 001 011 100 101 111 |
Modem disconnects. Modem attempts direct connection. Modem attempts normal connection. Modem attempts MNP connection. Modem attempts MNP connection. If it fails, modem attempts direct connection. Modem attempts MNP connection. If it fails, modem attempts normal connection. | |
|
FLASH DIAL MODIFIER TIME | |
|
Format |
AT [cmds] S29=n [cmds] |
|
Example: |
AT S29=26 <CR> |
|
Default: |
0 |
|
Range: |
0 - 255 |
|
Unit: |
10 ms |
|
Description: |
Time the modem will go on-hook upon receiving the ! dial modifier in dial string. |
|
FLOW CONTROL | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] \Gn [cmds] |
|
Example: |
AT G1 &K3 <CR> |
|
Description: |
Selects modem port flow control. |
|
Command |
Function |
|
\G0 |
Flow control disabled. |
|
\G1 |
Flow control enabled. |
|
FLOW CONTROL CHARACTER - XOFF | |
|
Type: |
Register |
|
Format: |
AT [cmds] S33=n [cmds] |
|
Example: |
ATS33=34 <CR> |
|
Default: |
19 |
|
Range: |
0 - 255 |
|
Unit: |
ASCII |
|
Description: |
Sets the character used to represent XOFF. |
|
FLOW CONTROL CHARACTER - XON | |
|
Type: |
Register |
|
Format: |
AT [cmds] S32=n [cmds] |
|
Example: |
ATS32=86 <CR> |
|
Default: |
17 |
|
Range: |
0 - 255 |
|
Unit: |
ASCII |
|
Description: |
Sets the character used to represent XON. |
|
HANDSHAKE OPTIONS | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] S48=n [cmds] |
|
Example: |
AT S48=7 <CR> |
|
Default: |
7 |
|
Range: |
0, 7, or 128 |
|
Description: |
Controls the V.42 handshake sequence. |
|
Command |
Function |
|
S48=0 |
V.42 negotiation disabled. |
|
S48=7 |
V.42 negotiation enabled. |
|
S48=128 |
V.42 disabled; fallback according to S36. |
|
LEASED LINE TRANSMISSION LEVEL | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] S99=n [cmds] |
|
Example: |
AT S99=8 <CR> |
|
Default: |
10 |
|
Range: |
0 - 15 |
|
Unit: |
-1 dBm |
|
Description: |
Sets the signal level for transmission when in leased-line mode. |
|
LINE TYPE | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] %Mn [cmds] |
|
Example: |
AT %M0 H1 DT555-1212 <CR> |
|
Description: |
Selects line type. |
|
Command |
Function |
|
%M0 |
Switched line. |
|
%M1 |
Leased line. |
|
MAXIMUM BLOCK SIZE FOR TRANSMISSION | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] \An [cmds] |
|
Example: |
AT \A3 &MB28800 <CR> |
|
Description: |
Sets the maximum transmittable block size. |
|
Command |
Function |
|
\A0 |
Maximum MNP block size is 64 characters. |
|
\A1 |
Maximum MNP block size is 128 characters. |
|
\A2 |
Maximum MNP block size is 192 characters. |
|
\A3 |
Maximum MNP block size is 256 characters. |
|
MNP STREAM/BLOCK MODE | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] \Ln [cmds] |
|
Example: |
AT \L1 DT555-1212 <CR> |
|
Description: |
Selects the transfer mode for MNP. |
|
Command |
Function |
|
\L0 |
Stream mode for MNP enabled. |
|
\L1 |
Block mode for MNP enabled. |
|
MNP10 COMPRESSION | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] -Kn [cmds] |
|
Example: |
AT %C1 -K1 -Q0 <CR> |
|
Description: |
Selects MNP10 data compression. |
| Command |
Function |
| -K0 |
MNP10 disabled. |
| -K1 |
MNP10 enabled. |
| -K2 |
MNP10 enabled on originate mode only. |
|
PROTOCOL/SPEED | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] Fn [cmds] |
|
Example: |
AT F0 A <CR> |
|
Description: |
Selects the current protocol and speed. |
|
Command |
Function |
|
F0 |
Auto-select fastest common protocol. |
|
F1 |
V.21/Bell 103A 300bps. |
|
F3 |
V.23 1200/75bps. |
|
F4 |
V.22/Bell 212A 1200bps. |
|
F5 |
V.22bis. |
|
F6 |
V.32bis/V.32 4800bps. |
|
F7 |
V.32bis 7200bps. |
|
F8 |
V.32 9600bps |
|
F9 |
V.32bis 12Kbps |
|
F10 |
V.32bis 14.4Kbps |
|
PROTOCOL/SPEED | |||
|
Format |
AT [cmds] S37=n [cmds] | ||
|
Example: |
AT S37=0 <CR> | ||
|
Default: |
0 | ||
|
Range: |
0 - 15 | ||
|
Unit: |
Bit-mapped | ||
|
Description: |
Selects the current protocol and speed. | ||
|
Bit | Value |
Function | |
|
3 - 0 | 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 |
Auto-select fastest common protocol. V.21/Bell 103A 300bps. V.21/Bell 103A 300bps. V.21/Bell 103A 300bps. Not used. V.22. V.22bis. V.23 1200/75bps. V.32bis/V.32 4800bps. V.32 9600bps. V.32bis 12Kbps. V.32bis 14.4Kbps. V.32bis 7200bps. | |
|
SLEEP TIMER | |
|
Format |
AT [cmds] S24=n [cmds] |
|
Example: |
AT S24=40 <CR> |
|
Default: |
1 |
|
Range: |
0 - 255 |
|
Unit: |
10 ms |
|
Description: |
Maximum duration of DTE and DCE inactivity allowed prior to initiating low-power sleep mode. |
|
TEST MODES | |||
|
Format |
AT [cmds] S16=n [cmds] | ||
|
Example: |
AT S16=113 <CR> | ||
|
Default: |
0 | ||
|
Range: |
0 - 125 | ||
|
Unit: |
Bit-mapped | ||
|
Description: |
Controls loopback tests, analog, digital, remote digital, and self tests. | ||
|
Bit |
Value |
Function | |
|
0 |
0 1 |
Local analog loopback not in progress. Local analog loopback in progress. | |
|
1 |
0 |
Not used. | |
|
2 |
0 1 |
Local digital loopback not in progress. Local digital loopback in progress. | |
|
3 |
0 1 |
Modem not in remote digital loopback. Remote digital loopback in progress. | |
|
4 |
0 1 |
Remote digital loopback not requested. Remote digital loopback requested. | |
|
5 |
0 1 |
Remote digital loopback w/ self-test not in progress. Remote digital loopback w/ self-test in progress. | |
|
6 |
0 1 |
Local analog loopback w/ self-test not in progress. Local analog loopback w/ self-test in progress. | |
|
TEST MODE - PTT | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] %TT [cmds] |
|
Example: |
AT %TT &W <CR> |
|
Description: |
Send PTT test signals for European line test. |
|
V.23 SPLIT BAUD MODE | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] \Wn [cmds] |
|
Example: |
AT \W1 <CR> |
|
Description: |
Controls V.23 split baud mode. |
|
Command |
Function |
|
\W0 |
V.23 split baud mode disabled. |
|
\W2 |
V.23 split baud mode enabled. |
|
WRITE TO LAST STATUS REGISTER | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] S=n [cmds] |
|
Example: |
AT S=6 <CR> |
|
Description: |
Set value of last accessed S-register. |