RC224ATL/224ATLV
4.0 AT Commands
EmbeddedModem Family
Table 4-3. Fax Command Set Summary (1 of 2)
Fax Command
Function
Service class
Default
Parameters/Description
+FCLASS=n
n = 0
Select Service Class. +FCLASS=n command sets the active service
class.
+FCLASS=0 Returns to data mode
+FCLASS=1 Fax Class 1
+FCLASS=2 Fax Class 2 (Not supported)
+FCLASS=3 Fax Class 3 (Not supported)
+F<command>?
Report Active Configuration
—
—
Report Active Configuration. +F<command>? interrogates the
modem to determine the active configuration.
The responses are:
+FAA?
0 if auto answer is disabled; 1 if auto answer is
enabled
+FCLASS 0 if in data mode; 1 if in fax class 1
+FF? 0 if flow control off; 1 if flow control on
+F<command>=? Report Operating
Capabilities
Report Operating Capabilities. +F<commands>=? can be used to
determine the operating capabilities of the modem.
The responses are:
+FAA=?
0, 1
+FCLASS=? 0, 1
+FTM=?
+FTM=?
+FTH=?
+FTH=?
+FF=?
24, 48, 72, 96
24, 48
3
3
0,1
+FAA=n
Data/Fax Auto Answer
n = 0
Data/Fax Auto Answer. +FAA command configures the modem to
automatically detect whether an incoming call is from a data
modem or a fax modem. This command is valid in both data and
fax modes.
n = 0 Disable data/fax auto answer mode (default).
n = 1 Enable data/fax auto answer mode. The modem
determines calling type and issues DATA result code (13) if
caller is a data modem, or issues FAX result code (15) in
the caller is a fax modem.
+FF
Enhanced Flow Control
Stop Transmission and Wait
Receive Silence
n = 0
n = 0
n = 0
Enhanced Flow Control. +FF=n command enables an enhanced
flow control mode for data transfer between the DTE and DCE.
n = 0 Disables enhanced flow control interface. In this mode,
data transfer is compatible with the EIA-578 standard.
n = 1 Enables enhanced flow control.
+FTS=n
+FRS=n
Stop Transmission and Wait. +FTS=n causes the modem to
terminate a transmission. After temination the modem waits for n
10–ms intervals before responding with the OK result code. An
ERROR response code results if this command is issued while the
modem is on-hook.
Receive Silence. +FRS=n causes the modem to report back to the
DTE with an OK result code after n 10-millisecond intervals of
silence have been detected on the line. This command is aborted if
any command character is received. The modem discards the
aborting character and issues an OK result code. An ERROR
response code results if this command is issued while the modem
is on-hook.
D224ATLVDSC
Conexant
4-7
CONEXANT [ CONEXANT SYSTEMS, INC ]
