Specifications

HYLAFAX-CONFIG(5F) HYLAFAX-CONFIG(5F)
Class1AdaptRecvCmd
The command used to enable adaptive reception support (usually ‘‘AT+FAR=1’’). This feature is
newinT.31, and manymodems will not support it. This feature may reduce the number of recep-
tion failures due to errors cascading from +FCERROR messages.
Class1ColorJPEGSupport
Whether or not to enable support for T.30-E full-color facsimile with JPEG compression.
Enabling this automatically enables Class1GreyJPEGSupport.
Class1EnableV34Cmd
The command to enable V.34-fax support with at least the desired maximum primary channel rate.
Class1ECMSupport
Whether or not to support T.30-A error correction protocol. Use of ECM will require 64 kilobytes
of free memory per modem in active use.
Class1PersistentECM
Whether or not to continue to retransmit and allowtocontinue to receive image data in ECM pro-
tocol which is not accepted as valid after four successive attempts.
Class1ECMFrameSize
The size in bytes of image frames to transmit during ECM protocol. This setting will also indicate
apreference in receive sessions. The only acceptable values are 64 and 256. Asetting of 64 may
be useful on high-load systems and possibly environments with extremely poor line quality.
Class1ExtendedRes
Whether or not to support resolutions other than normal and fine. This option has been deprecated
by Class1Resolutions.
Class1FrameOverhead
The number of extraneous bytes in HDLC frames sent to the host in response to an ‘‘AT+FRH’’
command. For modems that properly implement the Class 1 interface, this number should be 4
(the default).
Class1GreyJPEGSupport
Whether or not to enable support for T.30-E greyscale facsimile with JPEG compression. This is
always enabled if Class1ColorJPEGSupport is enabled.
Class1HookSensitivity
The number of times to ignore on-hook detections and merely treat them as command or modem
errors.
Class1JBIGSupport
Whether or not to enable support for T.85 monochrome facsimile with JBIG compression.
Options are ‘‘true’’for support in both sending and receiving, ‘‘false’’for no support, ‘‘send’’for
support only in sending, and ‘‘receive’’ for support only in receiving. If, during the build process a
compatible JBIG library was found then send support is enabled by default. If, during the build
process the TIFF tools are found to support JBIG then receive support is enabled by default.
Class1HasRHConnectBug
AClass 1 modem should only report CONNECT after AT+FRH=3 when V.21 HDLC data is
detected. However, some modems will incorrectly report CONNECT after AT+FRH=3 whenever
anycarrier is present. In such cases Class1HasRHConnectBug should be set to ‘‘true’’.
Class1HFLOCmd
The command to setup hardware (RTS/CTS)flow control between DTE and DCE when operating in
Class 1. This command is issued immediately after sending the Class1Cmd to switch the modem
to Class 1 operation.
Class1MRSupport
Whether or not to enable support for two-dimensional Modified Read (MR) image data format
compression.
$Date$ 28