Telenetics 56 - Manual (Page 185)

AT Commands
Page 177
This command controls Phase C data (T.4 encoded data) transferred during execution of
+FDT or +FDR commands.
The following two codes are supported:
+FBOR=0 or 2 Selects direct bit order for Phase C data.
+FBOR=1 or 3 Selects reversed bit order for Phase C data.
This parameter does not affect the bit order of control characters generated by the DCE.
+FAA - Answer Parameter
Write syntax: +FAA=<value>
Valid values: 0 or 1
Default value: 0
+FAA=0 Constrains the DCE to answer as set by +FCLASS.
+FAA=1 Indicates that the DCE can answer and automatically determine
whether to answer as a Class 2 facsimile DCE or as a data
modem. If the DCE automatically switches, it modifies FCLASS
appropriately.
Fax adaptive answer operates only when +FCLASS=0. Class 2 adaptive answer is
implemented as follows: First, a data mode handshake is attempted. If the DCE has been
configured for automode detection (using the +MS command), the DCE may try several
protocols before terminating attempts to make a data mode connection. This can take as
long as 6-8 seconds.
If the data mode connection attempt fails, a facsimile Class 2 connection is assumed.
When a connection is made as a result of the adaptive answer, the DCE issues the DATA
or FAX result code before the CONNECT or +FCON message to inform the DTE of the
connection type. After making a Class 2 connection, the DCE stays on-line rather than
going into the command mode as with a Class 1 connection.
+FBUF? - Buffer Size
The +FBUF parameter allows the DTE to determine the characteristics of the DCE's data
buffer. Data buffers are used for flow control. Use of the reported values allow the DTE
to transfer data without provoking XOFF.
Read syntax: +FBUF?
DCE response syntax : <bs>, <xoft>, <xont>, <bc>
where:
<bs> = total buffer size
<xoft> = XOFF threshold
<xont> = XON threshold
<bc> = current buffer byte count
Example:
+FBUF?
512, 506, 500, 0