[hylafax-devel] Re: Modem Reset Commands

[Dmitry Bely <dbely@mail.ru>]

Steve Williams <steve@genie96.com> writes:

> > - usually admins tune their modems once (e.g. adjust TX level for the
> > specific telco line) and then store resulting settings to the NVRAM; that's
> 
> I have spoke on this before, but no-one that hopes to run HylaFAX RELIABLY
> in a mixed data/fax environment can rely on this.  I know 100 % for sure that
> I do NOT rely on the modem being in any "default" state.

:-)

Then you should never switch on your modem, because it automatically loads
"default" ATZ profile after supplying the power.

Look, I do not claim that ATZ has to be the only init command for all
cases. I just propose two-step ininializing sequence (not taking into
account that Hylafax itself does):

ModemSoftResetCmd        ATZ (default)
ModemResetCmds           ""  (default)

You can change both parameters as you like. But for most users the proposed 
defaults are the reasonable choice.

> I have mentioned this before..
> 
> HOWEVER, if the ATZ resets the data pump, then I am all for it.
> BUT...the state of the modem after the ATZ MUST BE SUSPECT.. if a user
> ( via cu, minicom, etc ) has set the modem to something & done an AT&W

... then the next DTR drop will also restore NVRAM profile values (see
Robert's message). Should DTR dropping be also prohibited? :-))

> I just like to make this real clear...  In a fax only environent, where
> HylaFAX is the only thing accessing the modem, relying on ATZ would
> be acceptable.

Hope to hear from you soon,
Dmitry



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