| Code |
Description |
Code |
Description |
| +++ |
Standard escape sequence |
ATD |
Dial (ATD number) |
| , |
Standard pause character |
ATDP |
Pulse dial (ATDP number) |
| AT |
Standard attention sequence |
ATDT |
Tone dial (ATDT number) |
| AT&C |
DCD always on |
ATE0 |
Disable local character echo |
| AT&C1 |
DCD on while carrier present |
ATE1 |
Enable local character echo |
| AT&D |
DTR ignored |
ATF0 |
Half Duplex (modem echoes characters) |
| AT&D1 |
DTR fail disconnect enabled |
ATF1 |
Full Duplex (modem does not echo characters) |
| AT&D2 |
DTR fail disconnect enabled (auto answer off) |
ATH0 |
Force line on hook |
| AT&D3 |
DTR fail disconnect enabled (reset modem) |
ATH1 |
Force line off hook |
| AT&F |
Restore to factory configuration |
ATH2 |
Force line special off hook (used for HAM radio) |
| AT&G |
No guard tone |
ATI0 |
Request product code, formatted PPR, PP=prod., R=rev. |
| AT&G1 |
550 Hz guard tone |
ATI1 |
Request ROM check sum |
| AT&G2 |
1800 Hz guard tone |
ATL1 |
Speaker volume low (modem specific) |
| AT&J |
RJ11/RJ41S/RJ45 jack |
ATL2 |
Speaker volume medium (modem specific) |
| AT&J2 |
RJ12/RJ13 jack |
ATL3 |
Speaker volume high (modem specific) |
| AT&L |
Regular phone line |
ATM0 |
Speaker always off |
| AT&L1 |
Leased line |
ATM1 |
Speaker on except while carrier present |
| AT&M |
Async operation |
ATM2 |
Speaker always on |
| AT&M1 |
Async/sync operation |
ATM3 |
Speaker on except while dialing and carrier present |
| AT&M2 |
Sync auto dial |
ATO |
Force modem into on-line state |
| AT&M3 |
Sync manual dial |
ATP |
Sets modem to default pulse dial |
| AT&P |
39/61 pulse make/break ratio |
ATQ0 |
Modem returns result codes |
| AT&P1 |
33/67 pulse make/break ratio |
ATQ1 |
Modem does not return result codes |
| AT&T4 |
Grant RDL test request |
ATR |
Sets modem to answer mode after dialing out |
| AT&T5 |
Deny RDL test request |
ATSn |
Where Sn is S register number 'n' |
| AT&W |
Write current registers to non-volatile memory |
ATT |
Sets modem to default tone dial |
| AT&X |
Sync clock internal |
ATV0 |
Send numeric codes |
| AT&X1 |
Sync clock external |
ATV1 |
Send word result codes |
| AT&X2 |
Sync clock slaved |
ATX0 |
Basic result code set "CONNECT", no dial tone detect |
| AT&Z |
Store dial command line |
ATX1 |
Extended result code set "CONNECT 1200", no dialtone detect |
| ATA |
Force immediate answer |
ATX2 |
Wait for dial tone, extended result codes |
| ATB0 |
CCITT V.22 at 1200 bps |
ATX3 |
Detect busy signal, extended result codes |
| ATB1 |
BELL 212A at 1200 bps |
ATX4 |
Wait for dial tone, detect busy, extended result codes |
| ATC0 |
Transmitter off |
ATZ |
Reset to power up condition |
| ATC1 |
Transmitter on |
|
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