[hylafax-devel] Re: config/usr-xon & usr-rts

[Darren Nickerson <darren@dazza.org>]

>>>>> On 24 Jun 2000, "Dmitry" == Dmitry Bely wrote:

  Dmitry> Sure. But the question is: should AA be enabled with the *default*
  Dmitry> setting or not? If yes (although I don't like it) we should do it
  Dmitry> uniform way. i.e. for *all* modem templates supplied, where it is
  Dmitry> possible (all Class2/Class2.0 modems).

I agree. We should probably reach consensus on which way to go on this. 
Dmitry, it would be useful to us if you could provide any data which supports 
your suggestion that having this enabled can actually cause fax reception 
problem. The quote from the HylaFAX.ORG web pages is pretty compelling, but is 
that information as out of date as the rest of it? ;-)

This feature is potentially pretty important to a lot of installations. If
we were to lean towards disabling it in a default install, might it be wise
to have the AA config params present in each template (in a way which WOULD
actually work with that modem) but to have them commented out?

  Dmitry> Understand me right: I have nothing against auto-answer feature in
  Dmitry> general (although it makes connect longer and sometimes do not work
  Dmitry> reliably -- useless waste of time in the fax-only environment). But
  Dmitry> the purpose of modem templates IMHO is working aroung specific modem
  Dmitry> quirks and nothing else.

This is, in itself, an interesting point. And to a large degree I think that's 
what they're used for. What about when you have an advanced setup feature 
which is quirky, but which we've decided not to enable by default? It should 
probably be IN the config file, but commented out. Agreed?

  Dmitry> So all non modem-specific defaults should comply to
  Dmitry> config(5f). Regarding ModemSetupAACmd is says that auto-answer is
  Dmitry> disabled by default.

Doesn't "default" in this context mean purely what HylaFAX will do in the ABSENCE of an entry in the config file? config(5f) does not indicate a default for ModemSetupAACmd, at least not the copy I have. It DOES indicate a default of "No" for AdaptiveAnswer however, which seems to be supported by the following caveat in config(5f):


              Note that the adaptive answer strategy depends on many factors
              that limit its usefulness.  When calls are answered first as
              fax, it typically only works with a Class 1 modem because it is
              important that the sequence of operations related to answering
              as fax be completed in a short enough time that a subsequent
              answer for data be done before the caller times out and hangs up
              the telephone (for this reason Class1RecvIdentTimer should be set
              to a value that is shorter than FaxT1Timer.)

Are a lot of people actually using AA in production?

Anyway, I'm not sure lines which enable AA in modem config files are at all inconsistent with the man pages . . . since the whole purpose of modem config files are to OVERRIDE the defaults mentioned therein.

It's late though, and I joined this thread late so I may be missing the point ;-)

-Darren




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