[hylafax-users] Re: Bad code word at scanline with Zylex U1496E

[___cliff rayman___ <cliff@genwax.com>]

thanks.  i will try your config recommendations.
are you using the modem in class2 or class2.0 mode?

Dmitry Bely wrote:

> ___cliff rayman___ <cliff@genwax.com> writes:
>
> > i am getting this Bad code word at scanline problem on about 10% of my
> > received faxes..
> > we are using: MODEM ZYXEL U1496E/V 6.19 P
> >
> > has anyone else gotten this modem to work with consistent results?
>
> Yes, works great for me.
>
> > if not, is there any consensus on a modem that does work well for both
> > sending and receiving?
> >
> > below is my current config.  i have toggled the ECM line (last line).
>
> ECM is *not* implemented in this modem (despite +FCC responce), so better
> disable it again ASAP.
>
> > tried 38400 and 19200.  and also tried the class2.0 interface.  i still
> > get the bad code word error message on about 10% of my faxes.:
> > CountryCode:            1
> > AreaCode:               818
> > FAXNumber:              1.818.764.3878
> > LongDistancePrefix:     1
> > InternationalPrefix:    011
> > DialStringRules:        etc/dialrules
> > ServerTracing:          1
> > SessionTracing:         11
> > RecvFileMode:           0644
> > LogFileMode:            0644
> > DeviceMode:             0600
> > RingsBeforeAnswer:      1
> > #SpeakerVolume:         medium
> > SpeakerVolume:          low
> > GettyArgs:              "-h %l %s"
> > LocalIdentifier:        GENWAX
> > TagLineFont:            etc/lutRS18.pcf
> > TagLineFormat:          "From %%l|%c|Page %%p of %%t"
> > NoCarrierRetrys:        3
> > MaxRecvPages:           25
> > ModemType:              Class2          # use class 2 interface
> > ModemRate:              19200           # 38.4 works fine
> > ModemFlowControl:       rtscts          # default
> > ModemNoFlowCmd:         AT&H0           # disable flow control
> > ModemHardFlowCmd:       AT&H3           # hardware flow control
> > ModemSoftFlowCmd:       AT&H4           # software flow control
> > ModemSetupDTRCmd:       AT&D2           # DTR off causes modem to hang
> > up
> > ModemSetupDCDCmd:       AT&C1           # DCD tracks carrier
> > ModemSetupAACmd:        AT+FAA=1        # enable in current class
> > ModemSendFillOrder:     LSB2MSB         # as expected
> > ModemRecvFillOrder:     MSB2LSB         # opposite of what makes sense
> > Class2RecvDataTrigger:  "\022"          # a la 2388-B
> > ModemResetCmds:         AT&B1&N0&S0*F0S18=3S38.3=1S39=0
>
> Useless stuff. Use
>
> ModemResetCmds:         ATZS38.3=1
>
> instead.
>
> > ModemDialCmd:           ATDT%s          # no '@' 'cuz then busy not
> > recognized
> > NoCarrierRetrys:        3               # retry 3 times on no carrier
> > ModemSetVolumeCmd:      "ATM0 ATM1L1 ATM1L3 ATM1L5 ATM1L7"
> > PagerSetupCmds:         AT&K0&N15       # use V.22 at 1200 bps (PageNet)
> >
> > #Class2DCCQueryCmd:     "!(0,1),(0-5),(0-4),(0-2),(0,1),(0),(0),(0-7)"
> >
> > example error message:
> > Fax3Decode2D: recvq/fax15356.tif: Bad code word at scanline 133 (x
> > 1728).
> > Fax3Decode2D: recvq/fax15356.tif: Bad code word at scanline 135 (x
> > 1728).
> > Fax3Decode2D: recvq/fax15356.tif: Bad code word at scanline 222 (x
> > 1728).
> > Fax3Decode2D: recvq/fax15356.tif: Bad code word at scanline 223 (x
> > 1728).
> > Fax3Decode2D: recvq/fax15356.tif: Uncompressed data (not supported) at
> > scanline 224 (x 349).
> > Fax3Decode2D: recvq/fax15356.tif: Bad code word at scanline 226 (x
> > 1438).
> > --snip 30 lines
> > Fax3Decode2D: recvq/fax15356.tif: Uncompressed data (not supported) at
> > scanline 776 (x 650).
> > Fax3Decode2D: recvq/fax15356.tif: Bad code word at scanline 777 (x
> > 1728).
>
> Fax transmission is not reliable, and errors sometimes happen. The quality
> checking is not enabled in your config, so Hylafax just stores received
> data "as is" with errors. I recommend you the following (will likely be
> included into the new Hylafax beta):
>
> [---cut---]
> #
> # ECM is not implemented in U1496 despite AT+FCC=? says
> #
> Class2DCCQueryCmd:      "!(0,1),(0-5),(0-4),(0-2),(0,1),(0),(0),(0-7)"
> #
> # Quality Checking is not implemented in U1496 despite AT+FCQ=? says
> #
> Class2CQQueryCmd:       "!(0),(0)"
> #
> # Disable unnecessary, not implemented and possibly dangerous commands
> #
> Class2BORCmd:           "AT"
> Class2PIECmd:           "AT"
> Class2PHCTOCmd:         "AT"
> Class2TBCCmd:           "AT"
> [---cut---]
>
> Also note what with current Hylafax you will suffer from "endless RTN" bug,
> but it's quite another story :-)
>
> Hope to hear from you soon,
> Dmitry
>
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--
___cliff rayman___www.genwax.com___cliff@genwax.com___




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