Re: [hylafax-users] [hylafax-devel] ATDT%s@ trick

[Dmitry Bely <dbely@mail.ru>]

Steve Williams <steve@genie96.com> writes:

> No, it's not 5 seconds from dialing, it's 5 seconds AFTER the phone is
> answered.  

Does your modem manual really says so, or it's only your opinion?

> The modem knows whether the line is ringing, or has been answered,

Very doubtful. How the modem knows that the remote has been answered?
Measuaring the interval between ringbacks? But what if ringbacks only
appears after the big delay? Say, typical delay for regional/international
calls in this country is about 20 seconds. What will it do?

BTW, the comments to code I've posted, say that ringbacks are treated as
"NO ANSWER":

	case ClassModem::BUSY:		// busy signal
	case ClassModem::NOANSWER:	// no answer or ring back
	    if (fax.retrytime != 0)
		sendFailed(fax, send_retry, notice, fax.retrytime);
	    else
		sendFailed(fax, send_retry, notice, requeueTTS[callstat]);
	    /* fall thru... */

So, according to them it will give up hearing ringbacks ...

> and 
> at that point, it starts listening for "noise".. the remote fax machine
> starting it's tones, or silence.. ( of a data modem?? )...
> 
> > This behaviour IMHO is not acceptable. Many fax machines use "toll saver"
> > feature and go off-hook only after several incoming rings. Calling such fax 
> > machine the modem will hear ringbacks and giveup with "NO ANSWER"
> > ("BUSY"). So we will be unable to send any fax there ...

Hope to hear from you soon,
Dmitry




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