User's Manual

Chapter 3 – Fax Class 2 Commands
Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C) 90
Page Width Format Conversion, +FWDFC
Class 2.0/2.1 Not Applicable
Class 2
Write syntax: +FWDFC=<value>
Valid values: 0, 1, 2
Default value: 0
This parameter determines the modem’s response to a mismatch between the page
width negotiated for the facsimile session, reported by the +FCS:WD subparameter,
and the Phase C data desired by the host, indicated by the optional +FDT:WD
subparameter, or the +FIS=WD subparameter for +FDR operation. A mismatch
would require clipping or scaling a wider format to a narrower one.
FWDFC=0 Disables mismatch checking. The host must check the +FCS:WD
subparameter and transfer matching data.
FWDFC=1 Enables mismatch checking. An implied +FKS command is executed
on mismatch detection.
FWDFC=2 Enables mismatch checking with page width conversion in the
modem.
Fax Flow Control, +FLO
Syntax: +FLO=<value>
Valid values: 0, 1, 2
Default value: 1
The +FLO command allows the host to select and identify the types of flow control
provided and used. A TR29-standard modem can support XON/XOFF flow control.
XON is the ASCII <DC1> character (11h); XOFF is the ASCII <DC3> character (13h).
The modem may provide ITU-T V.24 circuits 106 (CTS) and 133 (RTS) for flow
control.
+FLO=0 No fax flow control.
+FLO=1 Software fax flow control (XON/XOFF flow control in either direction).
+FLO=2 Hardware fax flow control. ITU-T circuit 133 (RTS) is used for flow
control of the modem by the host. Circuit 106 (CTS) is used for flow
control of the host by the modem.
If circuits 106 and 133 are not being used for flow control (+FLO=2),
then circuit 106 drops when an XOFF is sent, and goes high when an
XON is sent. The conductor used for circuit 133 normally reverts to
use as circuit 105 (RTS) when not being used for flow control.