Re: [hylafax-users] Modem not dropping DTR

[Jeffrey Ross <jeff@wisdom.bubble.org>]

There has to be a better way, right now I have put into the "wedged" script
a line that does "stty -F ${device} ospeed 0" then I kill the faxgetty,
this will cause DTR to drop and the modem to handug and reset, init will
then restart faxgetty.

This is obviously a band-aid and hides the real problem.

How can I fix this problem correctly?

Jeff

> 
> I've been doing a little more probing on what's going on, the system is
> actually dropping
> DTR, however it is dropping too fast for the modem to identify a DTR
> drop, I can identify the drop as a short "blip" on the DTR light.  I
> tried to reduce the time the modem requires to see a DTR drop before
> it'll act upon it.  However, I was unsuccessful as the drop is too
> quick.
> 
> I did adjust the ModemResetDelay command up as high as 10000, and
> according to the tracelogs, faxgetty is lowering DTR for 10 seconds
> 
> Jul 20 23:15:21 wisdom PAM_pwdb[15842]: (login) session closed for user
> jeff
> Jul 20 23:15:21 wisdom FaxGetty[15835]: GETTY: exit status 0
> Jul 20 23:15:21 wisdom FaxGetty[15835]: MODEM set DTR OFF
> Jul 20 23:15:31 wisdom FaxGetty[15835]: MODEM set DTR ON
> Jul 20 23:15:31 wisdom FaxGetty[15835]: MODEM set baud rate: 115200
> baud, input flow RTS/CTS, output flow RTS/CTS
> Jul 20 23:15:31 wisdom FaxGetty[15835]: MODEM flush i/o
> Jul 20 23:15:31 wisdom FaxGetty[15835]: <-- [4:ATZ\r]
> Jul 20 23:15:36 wisdom FaxGetty[15835]: MODEM TIMEOUT: reading line from
> modem
> Jul 20 23:15:36 wisdom FaxGetty[15835]: MODEM <Timeout>
> Jul 20 23:15:36 wisdom FaxGetty[15835]: MODEM set DTR OFF
> Jul 20 23:15:46 wisdom FaxGetty[15835]: MODEM set DTR ON
> 
> I'm guessing there is a timing issue someplace.  some help from somebody
> would really be appreciated!
> 
> Thanks..
> 
> Jeff
> 
> 
> Jeffrey Ross wrote:
> > 
> > I've done a little more investigating and I'm now starting to point my
> > finger at faxgetty (albiet probably incorrectly).
> > 
> > It appears as if when a call comes in, faxgetty correctly does whatever
> > modem controlling it needs to do and then passes the call off to either
> > the getty or the fax program.  What I believe is happening is faxgetty
> > is somehow retaining some control of the port.  This in turn is preventing
> > the DTR to drop since there remains 1 active process on the port.
> > 
> > What I did to test this theory was after I connected (I allowed faxgetty to
> > accept the call and hand it off to getty) I stopped faxgetty by removing
> > its entry in the inittab, and issuing an "init q".  Upon issuing an exit, I
> > was promptly greeted with a "NO CARRIER" on my terminal, in otherwords
> > DTR did get dropped.
> > 
> > Is there something I missed in the configuration of faxgetty?  I thought
> > I followed the directions.  Or are all my guesses off the mark?
> > 
> > HELP!!
> > 
> > Thanks.
> > 
> > Jeff
> > 
> > >
> > >
> > > The setup is as follows, hylafax-4.1beta2-5rh6.i386.rpm was installed
> > > and configured, I am using faxgetty with the following line in
> > > /etc/inittab:
> > >
> > > d1:345:respawn:/usr/sbin/faxgetty ttyD1
> > >
> > > Modem: Multitech MT2834
> > > Serial port: Digiboard PC/8e (the standard PC serial ports have been
> > > tried with the same results)
> > >
> > > O.S. RedHat 6.2 (originally)
> > > Kernel 2.2.16
> > >
> > > upon completion of a data call or a fax call, DTR is never dropped to
> > > the modem.  I have verified this not only by the light on the font of
> > > the modem and using &D3 command, but with a serial line monitor that
> > > lights up red or green when a line is high or low.
> > >
> > > the config.ttyD1 is attached below, it is essentually unchanged from how
> > > the modem config set it up.
> > >
> > > prior to receiving the call, an stty -a provides the following (with
> > > faxgetty running):
> > >
> > > speed 115200 baud; rows 0; columns 0; line = 0;
> > > intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
> > > eol2 = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R; werase =
> > > ^W;
> > > lnext = ^V; flush = ^O; min = 1; time = 0;
> > > -parenb -parodd cs8 -hupcl -cstopb cread clocal crtscts
> > > -ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr -icrnl
> > > -ixon
> > > -ixoff -iuclc -ixany -imaxbel
> > > -opost -olcuc -ocrnl -onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0
> > > bs0 vt0
> > > ff0
> > > -isig -icanon -iexten -echo -echoe -echok -echonl -noflsh -xcase -tostop
> > > -echoprt -echoctl -echoke
> > >
> > > When a data call is established, the same command yields:
> > >
> > > speed 115200 baud; rows 0; columns 0; line = 0;
> > > intr = ^C; quit = ^\; erase = ^H; kill = ^U; eof = ^D; eol = <undef>;
> > > eol2 = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R; werase =
> > > ^W;
> > > lnext = <undef>; flush = ^O; min = 1; time = 0;
> > > -parenb -parodd cs8 hupcl -cstopb cread -clocal crtscts
> > > -ignbrk brkint ignpar -parmrk -inpck -istrip -inlcr -igncr -icrnl ixon
> > > -ixoff
> > > -iuclc ixany -imaxbel
> > > opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0
> > > vt0 ff0
> > > isig -icanon -iexten -echo echoe echok -echonl -noflsh -xcase -tostop
> > > -echoprt
> > > -echoctl -echoke
> > >
> > > notice hupcl is now set differently.
> > >
> > > If I kill faxgetty (remove the entry from inittab and do an init q) and
> > > then do an "stty -F /dev/ttyD1 hupcl", DTR will go low, suggestions
> > > please???
> > >
> > > HELP!!!
> > >
> > > thanks.. Jeff
> > >
> > > LongDistancePrefix:     1
> > > InternationalPrefix:    011
> > > DialStringRules:        etc/dialrules
> > > ServerTracing:          1
> > > SessionTracing:         11
> > > RecvFileMode:           0600
> > > LogFileMode:            0600
> > > DeviceMode:             0600
> > > RingsBeforeAnswer:      1
> > > SpeakerVolume:          off
> > > GettyArgs:              "-h %l F115200 vt100"  (*NOTE* the F115200 line
> > > in gettydefs
> > > does
> > > LocalIdentifier:        "Jeffrey Ross"          have HUPCL set)
> > > ClocalAsRoot:           yes
> > > TagLineFont:            etc/lutRS18.pcf
> > > TagLineFormat:          "From %%l|%c|Page %%p of %%t"
> > > MaxRecvPages:           200
> > > #
> > > #
> > > # Modem-related stuff: should reflect modem command interface
> > > # and hardware connection/cabling (e.g. flow control).
> > > ## and hardware connection/cabling (e.g. flow control).
> > > #
> > > ModemType:              Class2          # use class 2 interface
> > > ModemRate:              115200          # lock rate for DCE-DTE
> > > communication
> > > ModemFlowControl:       rtscts          # default
> > > #
> > > ModemHardFlowCmd:       AT&E4           # hardware flow control
> > > ModemSoftFlowCmd:       AT&E5           # software flow control
> > > ModemSetupDTRCmd:       AT&D3           # setup so DTR drop resets modem
> > > ModemSetupDCDCmd:       AT&C1           # setup so DCD reflects carrier
> > > (or
> > > not)ModemSetupAACmd:    AT+FAA=1        # enable adaptive-answer in
> > > class 2
> > > #
> > > # NB: some models get confused by the @
> > > #
> > > ModemDialCmd:           ATDT%s@         # T for tone dialing, @ for
> > > silence
> > > #
> > > Class2RecvDataTrigger:  "\022"          # character sent to modem to
> > > start recv
> > >
> > > --
> > > .Sig??? you want a stinkin' .Sig???
> > > Jeff Ross
> > > 973-463-0175 (home)                           jeff@wisdom.bubble.org
> > >
> > >
> > > ____________________ HylaFAX(tm) Users Mailing List _______________________
> > >  To unsub: mail -s unsubscribe hylafax-users-request@hylafax.org < /dev/null
> > >
> > >
> > 
> > --
> > .Sig??? you want a stinkin' .Sig???
> > Jeff Ross
> > 973-463-0175 (home)                             jeff@wisdom.bubble.org
> > 
> > ____________________ HylaFAX(tm) Users Mailing List _______________________
> >  To unsub: mail -s unsubscribe hylafax-users-request@hylafax.org < /dev/null
> 
> -- 
> .Sig??? you want a stinkin' .Sig???
> Jeff Ross
> 973-463-0175 (home)				jeff@wisdom.bubble.org
> 
> 
> ____________________ HylaFAX(tm) Users Mailing List _______________________
>  To unsub: mail -s unsubscribe hylafax-users-request@hylafax.org < /dev/null
> 
> 


-- 
.Sig??? you want a stinkin' .Sig???
Jeff Ross
973-463-0175 (home)				jeff@wisdom.bubble.org


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