Comtrol AT Commands for SmartACFL - Manual (Page 123)

Command Reference Manual
100722A Conexant 5-1
5. FAX CLASS 2 COMMANDS
The Fax Class 2 commands are summarized in Table 5-1.
5.1 COMMAND SYNTAX AND GUIDELINES
5.1.1 Mode Entry Commands
5.1.1.1 +FCLASS=2 - Select Facsimile Class 2 Mode
+FCLASS=2 selects the Fax Class 2 Mode (see Section 3.2.1.2).
5.1.2 DTE Commands
The ISO 646 character set (CCITT T.50 International Alphabet 5, American Standard Code for Information Interchange) is
used for the issuance of commands and responses. Only the low-order 7 bits of each character are used for commands or
parameters; the high order bit is ignored. Upper case characters are equivalent to lower case characters.
For Phase C data transmission or reception, all 8 bits are needed.
5.1.2.1 DTE Command Lines
A command line is a string of characters sent from a DTE to the modem (DCE) while the modem is in a command state. A
command line has a prefix, a body, and a terminator. Each command line (with the exception of the A/ command) must begin
with the character sequence AT and must be terminated by a carriage return. Commands entered in upper case or lower case
are accepted, but both the A and T must be of the same case, i.e., "AT" = ASCII 065, 084 or “at” = ASCII 097, 116. The body
is a string of commands restricted to printable ASCII characters (032 - 126). Space characters (ASCII 032) and control
characters other than CR (ASCII 013) and BS (ASCII 010) in the command string are ignored. The default terminator is the
ASCII <CR> character. Characters that precede the AT prefix are ignored. The command line interpretation begins upon
receipt of the carriage return character.
5.1.2.2 Facsimile Command Syntax
After the "AT" or "at" prefix, facsimile commands use extended syntax. Each command is preceded by the “+F” character and
consists of single characters and a decimal parameter (if applicable) terminated by the semicolon “:” character (ASCII 059) or
by the <CR> that terminated the command line. A missing decimal parameter is evaluated as 0.
For example, the command to instruct the modem to automatically answer a data or fax call and also enable reception is:
AT+FAE=0; +FCR 1 <CR>
Basic data mode and fax service class mode select commands are:
AT+FCLASS=0 <CR> for Data Mode
AT+FCLASS=1 <CR> for Service Class 1 Fax
AT+FCLASS=1.0 <CR> for Service Class 1.0 Fax
AT+FCLASS=2 <CR> for Service Class 2 Fax
In Class 2, the DCE makes and terminates calls, manages the communication session and negotiates (T.30 protocol) and
transports the image date to DTE. The T.4 protocol management of image data, etc., is done by DTE.
The response to
AT+FCLASS= 0<CR> in Data Mode
or
AT+FCLASS=2<CR> in Service Class 2 Fax
is
OK
The service class may be set by the DTE from the choices available using the “+FCLASS=<VALUE>” command.