Cermetek Microelectronics, Inc.
High Speed Modem and FAX Family
2003 Cermetek Microelectronics, Inc.
Page 14
Document No. 607-0003 Revision K3 (09/03)
Table 6B. Summary of Basic AT Commands.
Command
Function
&F0
Restore Factory configuration 0
&F1
Restore Factory configuration 1
&G0
Disable guard tone
&G1
Disable guard tone
&G2
Enable 1800 Hz guard tone
&K0
Disable DTE/DCE flow control
&K3
Enable RTS/CTS DTE/DCE flow
control
&K4
Enable XON/XOFF DTE/DCE flow
control
&K5
Enable transparent XON/XOFF flow
control
&K6
Enable both RTS/CTS & XON/XOFF
flow control
Kn
CONTROLS BREAK HANDLING
DURING THREE STATES
When modem receives a break from the DTE:
\K0,
2,
4
Enter on-line command mode, no
break sent to the remote modem
\K1 Clear
buffer
\K3
Send break to remote modem
immediately
\K5
Send break to remote modem in
sequence with tranmitted data
When modem receives \b in on-line command
state:
\K0, 1
Clear buffers & send break to remote
modem
\K2, 3
Send break to remote modem
\K4, 5
Send break to remote modem in
sequence with tranmitted data
When modem receives a break from remote
modem:
\K0, 1
Clear data buffers and send break to
DTE
\K2, 3
Send break immediately to DTE
\K4, 5
Send break with received data to
DTE
\N0
Select normal speed buffered mode
\N1 Select
direct
mode
\N2
Select reliable mode
\N3
Select auto reliable mode
\N4 Force
LAPM
mode
\N5
Force MNP mode
\V0
Connect messages are controlled by
the command settings X, W, and S95
\V1
Connect messages are displayed in
the single line format
+MS Select
modulation
ERROR CORRECTING COMMANDS
%C0
Disable data compression
%C1
Enable MNP 5 data compression
%C2
Enable V.42bis data compression
Command
Function
%C3
Enable both V.42bis and MNP 5
compression
\A0
Set maximum block size in MNP to 64
\A1
Set maximum block size in MNP to
128
\A2
Set maximum block size in MNP to
192
\A3
Set maximum block size in MNP to
256
\Bn
Send break of n x 100 msec
&M0
Select direct asynchronous mode
&P0
Set 10pps pulse dial with 39%/61%
make/break
&p1
Set 10pps pulse dial with 33%/67%
make/break
&P2
Set 20pps pulse dial with 39%/61%
make/break
&P3
Set 20pps pulse dial with 33%/67%
make/break
&Q0
Select direct asynchronous mode
&Q5
Modem negotiates an error corrected
link
&Q6
Select asynchronous operation in
normal mode
&V
Display current configuration
&W0
Store the active profile in NVRAM
profile 0
&W1
Store the active profile in NVRAM
profile 1
&Y0
Recall stored profile 0 upon power up
&Y1
Recall stored profile 1 upon power up
&Zn=x
Store dial string x (to 31) to location n
(0-3)
%E0
Disable line quality monitor and auto
retrain
%E1
Enable line quality monitor and auto
retrain
%E2
Enable line quality monitor and
fallback
MNP10 COMMANDS
-K0
Disable MNP 10 extended services
-K1
Disable MNP 10 extended services
-K2
Disable MNP 10 extended services
FAX CLASS 1
+FCLASS=n Service Class
+FAE=n
Data/fax auto answer
+FRH=n
Receive data with HDLC framing
+FRM=n Receive
data
+FRS=n Receive
silence
+FTH=n
Transmit data with HDLC framing
+FTM=n Transmit
data
+FTS=n
Stop transmission and wait
