US Robotics 56K USB Modem User Manual page 63

+FBO=<value>—Phase C Data-Bit Order and Phases B and D Data-Bit Order
This command is used to by DCE to offer service to convert Phase C and Phase B/D data bit order
transparently to the DTE and remote facsimile. A direct mapping means the first bit transferred of each
octet on the DTE-DCE link is the first bit transferred on the PSTN line. A reversed mapping means the last
bit transferred of each octet on the DTE-DCE link it the first bit transferred on the PSTN line.
Result codes:
• OK if <value> = 0, 3.
ERROR if <value> ≠ 0, 3.
•
Table 128. +FBO Commands
Command
+FBO=0 Selects direct bit order for Phase C and for Phase B/D (default).
+FBO=1 Selects reversed bit order for Phase C. Selects direct bit order for Phase B/D.
+FBO=2 Selects direct bit order for Phase C. Selects reversed bit order for Phase B/D.
+FBO=3 Selects reversed bit order for Phase C and for Phase B/D.
Table 129. +FBO Extended Syntax Commands
Command
+FBO=<value>
+FBO?
+FBO=?
+FBU=<enable>—HDLC Frame Reporting Control
Use this command to enable the DCE to report the contents of Phase B and Phase D HDLC frames to the
DTE as they are sent and received, and also to disable this function.
Result codes:
• OK if <enable> = 0, 1.
ERROR if <enable> ≠ 0, 1.
•
Table 130. +FBU Commands
<enable>
0 Disables HDLC frame reporting (default).
1 Enables HDLC frame reporting.
Table 131. +FBU Extended Syntax Commands
Command
+FBU=<enable>
+FBU?
+FBU=?
+FCC—Establish DCE Capabilities
+FCC=<vr>,<br>,<wd>,<ln>,<df>,<ec>,<bf>,<st>,<jp> is used by DTE to sense DCE capabilities and
constrain if necessary. The controllable capabilities are resolution (vr), bit rate (br), page width in pixels
Selects direct or reversed Phase C and Phase B/D bit order.
Displays the current setting for Phase C and Phase B/D bit order.
Displays the available parameter values for the +FBO command.
Function
Enables or disables HDLC frame reporting.
Returns the current value of <enable>.
Displays all available parameter values. The DCE returns (00,01).
Function
Description
Function
Command Reference - 57
56K USB Modem
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