Re: [hylafax-users] T.30 T2 timeout errors

["Tom Rymes" <trymes@xxxxxxxxxxxxxxxx>]

Hi there,

I have been having the (now infamous) problem of the USR 
T.30 T2 Timeouts on my RH 8 server running Hylafax 4.1.8 
with two USR PCI modems (forget the model number, they're 
hardware, not winmodems)

Anyhow, I added the "Class1SwitchingCmd: <delay:7>" line 
at the end of my config.ttySx files and restarted the 
Hylafax processes (service hylafax restart). As of now, 
I'm still getting errors, though I'll try to determine if 
the overall quantity is lower. 

Just FYI, Lee, as you asked for input.

Tom



On Mon, 12 Jul 2004 17:50:02 -0400
 "Steve Melo" <smelo@xxxxxxxxxxxxxxxxx> wrote:
> Lee,
>
> I do not see the "Class1SwitchingCmd" option in the 
> hylafax config
> documentation, is this new with 1.4.8?
> I put the line: "Class1SwitchingCmd: <delay:7>" exactly 
> as you typed it into
> my "config.ttyS1" config file including the "<" and ">" 
> symbols, is this
> correct?
>
> You also mentioned that this is a common problem with the 
> USR modem.  Would
> you be able to recomend something better?  I only used 
> this modem because it
> was given to me, but buying a new modem specificly for 
> hylafax would not be
> out of the question.
>
> I will write back with the resaults of this 
> configuration.
>
> Thanks again,
>
> steve
>
>
>
>
>
>
> > On 2004.07.12 13:32 Steve Melo wrote:
> >
> > > Jul 12 16:20:23.38: [15990]: <-- [9:AT+FRH=3\r]
> > > Jul 12 16:20:23.56: [15990]: --> [7:CONNECT]
> > > Jul 12 16:20:24.57: [15990]: --> HDLC<5:FF C8 F2 AC 
> > A0>
> > > Jul 12 16:20:24.57: [15990]: --> [2:OK]
> > > Jul 12 16:20:24.57: [15990]: RECV recv MPS (more 
> > pages, same document)
> > > Jul 12 16:20:24.57: [15990]: <-- [9:AT+FRS=7\r]
> > > Jul 12 16:20:24.68: [15990]: --> [2:OK]
> > > Jul 12 16:20:24.68: [15990]: <-- [9:AT+FTH=3\r]
> > > Jul 12 16:20:54.68: [15990]: MODEM TIMEOUT: reading 
> > line from modem
> > > Jul 12 16:20:54.68: [15990]: MODEM <Timeout>
> > > Jul 12 16:20:54.68: [15990]: RECV send MCF (message 
> > confirmation)
> > > Jul 12 16:20:54.68: [15990]: RECV FAX (00002399): from 
> > <UNSPECIFIED>,
> > > page 2
> > > in 0:54, INF, 3.85 line/mm, 2-D MR, 14400 bit/s
> > > Jul 12 16:20:54.68: [15990]: <-- HDLC<3:FF C8 31>
> > > Jul 12 16:20:57.23: [15990]: --> [5:ÿO]
> >
> > Translated into english:
> >
> > (After receiving a page of image data...) We 
> > successfully raise the
> > message reception carrier and receive the MPS signal 
> > indicating more
> > pages of image data are yet to come.  We successfully 
> > wait for 70 ms of
> > silence before attempting to raise the message 
> > transmission carrier to
> > send the message confirmation signal (MCF).  However, 
> > the modem cannot
> > raise the transmission carrier for some reason, and 
> > HylaFAX never gets
> > back a response from the modem for 30 seconds, at which 
> > point it
> > times-out.  By this time the fax session would be lost 
> > anyway, but
> > HylaFAX sends the MCF signal data anyway and gets back 
> > garbage from the
> > modem.  That "garbage" (actually data sent from the 
> > modem to the
> > computer at a different baud rate than what we're 
> > expecting) is what
> > the modem spits out when it "resets" internally.
> >
> > So in other words, something happened during the fax 
> > session that
> > caused the modem to reset itself.  This is a modem 
> > firmware bug, and is
> > very commonplace with USR modems.  You can choose to 
> > live with it, try
> > to get USR to fix it, or get a new modem.
> >
> > However, this kind of problem only became noticeable 
> > recently (i.e.,
> > prior to 4.1.3 I don't remember anyone complaining about 
> > stuff like
> > this).  So, I have suspicions that the AT+FRS=7 command 
> > may be
> > influencing the modem's behavior.  If so, you may be 
> > able to alleviate
> > this by setting "Class1SwitchingCmd: <delay:7>" in your 
> > modem config
> > file.  If that works for you, please let us know.
> >
> > Lee.
>
>
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