Specifications

HYLAFAX-CONFIG(5F) HYLAFAX-CONFIG(5F)
included in the dialing command string. It is also important that, if possible, a trailing ‘‘@’’sym-
bol should be included so that the modem returns result codes that distinguish between no answer
and no carrier.Use of the ‘‘@’’permits the server to reduce the probability that a wrong number
is continually redialed. If the modem does not support this facility,then it may be necessary to
raise the number of retries done when a ‘‘NO CARRIER’’ result is returned.
ModemDialResponseTimeout
The maximum time to wait, in milliseconds, for a response from the modem after sending This
value should be longer than the timeout programmed into the modem through the ModemWait-
TimeCmd parameter.This additional server-based timeout is provided to guard against modems
that can ‘‘lock up’’when dialing the telephone.
ModemDoPhaseCDebug
Whether or not to query the modem for responses during image data transmission. Normally the
modem should not produce anyresponses during Phase C data transmission. However, insome
debugging scenarios (i.e. some Class 2.1 modems may showdebugging information) it may be
appropriate to query the modem for responses during the data transmission.
ModemDTRDropDelay
The time, in milliseconds, to pause between placing DTR OFF and DTR ON while resetting a
modem. This value should be at least equal to the time-value of the analogous S-register,usually
S25.
ModemEchoOffCmd
The command to disable echoing of commands sent to the modem.
ModemFlowControl
The type of flowcontrol to use between DTE and DCE;one of ‘‘NONE’’,‘‘XONXOFF’’ and
‘‘RTSCTS’’.This value is used to select the string sent to the modem to initially establish DTE-
DCE flowcontrol; one of ModemNoFlowCmd, ModemSoftFlowCmd,and ModemHard-
FlowCmd.The current flowcontrol setting is also used to select the appropriate flowcontrol
command to send to the modem when the software switches to Class 1, 2, or 2.0; see
Class1HFLOCmd, Class1NFLOCmd, Class1SFLOCmd, Class2HFLOCmd,
Class2NFLOCmd,and Class2SFLOCmd.
The server supports both software and hardware flowcontrol for Class 1, Class 2, and Class 2.0
modems. Whether to use hardware or software flowcontrol depends on the capabilities of the
modem and the host hardware and operating system. Communication rates above 9600 baud often
require that hardware flowcontrol be used for reliable DTE-DCE communication. However,
beware that manymodems only support software flowcontrol when sending or receiving facsim-
ile.
Note that modems usually support software flowcontrol eveniftheyhav e no explicit AT-com-
mand to activate it; in this case it is switched on when the modem enters fax mode, having
AT+FCLASS=... from DTE.
ModemFrameFillOrder
The bit order to expect for received HDLC frames and to use when formulating HDLC frames to
send. This value may be either LSB2MSB when bits are ordered from least-significant-bit to most-
significant-bit (as in the CCITT specification) or MSB2LSB when bits are ordered in the reverse
direction.
ModemHardFlowCmd
The command to setup hardware (RTS/CTS)flow control between DTE and DCE.
ModemMinSpeed
The minimum acceptable signalling rate for transmitting facsimile page data. Possible values are:
2400, 4800, 7200, 9600, 12200, and 14400.
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