Comtrol AT Command Set Rev A - Manual (Page 194)

AT Commands Reference Manual
Conexant 100722B
5-22
5.5.10 +FBOR - Data Bit Order
Write syntax: +FBOR=<value>
Valid values: 0, 1, 2, or 3
Default value: 0
This parameter controls the mapping between PSTN facsimile data and the DTE-DCE
link. There are two choices:
Direct: The first bit transferred to each byte on the DTE-DCE link is the first bit
transferred on the PSTN data carrier.
Reversed: The last bit transferred of each byte on the DTE-DCE link is the first bit
transferred on the PSTN data carrier.
There are two data types to control:
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.
5.5.11 +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.