jcb@loral.UUCP (Jay Bowden) (09/28/89)
I have a question for anyone who is using one of those
combination FAX & modem boxes: On an incoming call, can
the gadget differentiate between a modem calling, and a
fax machine calling?
And can it tell the PC it is hooked to which it is?
And while I am at it, can a FAX machine *originate* a
call, but then *receive* the FAX instead of sending it
(sort of the reverse of what is normal fax behavior)?
Thanks to all who respond!
- Jay
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Jay Bowden, EE/Consultant; see also Bowden Engineering
Currently contracted at Loral Instrumentation, San Diego
{ucbvax, ittvax!dcdwest, akgua, decvax, ihnp4}!ucsd!loral!jcbsl@van-bc.UUCP (Stuart Lynne) (09/29/89)
In article <2398@loral.UUCP> jcb@loral.UUCP (Jay Bowden) writes: > > And while I am at it, can a FAX machine *originate* a > call, but then *receive* the FAX instead of sending it > (sort of the reverse of what is normal fax behavior)? > Yes. It's called polling. It must be supported at both ends. Basically the document is left in the machine being called. When the other machine calls, instead of receiving, it asks to send. And the calling machine agrees to receive instead of sending. Insecure in that any other machine that supports polling can call in and collect the document instead. So often a "password" of sorts is programmed in. Then only the machine knowing the (typically 2 digit) password can collect the document. In larger (read expensive) systems somtimes combined with user id to retrieve fax's from a "mailbox". -- Stuart.Lynne@wimsey.bc.ca uunet!van-bc!sl 604-937-7532(voice) 604-939-4768(fax)
chrisb@escargot.UUCP (Chris Bradley) (10/02/89)
> I have a question for anyone who is using one of those > combination FAX & modem boxes: On an incoming call, can > the gadget differentiate between a modem calling, and a > fax machine calling? Well, I have an Intel Connection Co-Processor in my machine at work. The way you tell the CCP to answer with the modem and not the fax is to set the "ATS0=1" register, for answering on the first ring. This takes care of it. > And can it tell the PC it is hooked to which it is? The Intel CCP has an 80188 processor on board. It shares the bus and does all of its "faxing" in the background. This includes storing it on disk as it comes in. The problem with most fax machines makes your computer become a Fax ONLY. The CCP allows you to go about your business and receives them at will. > And while I am at it, can a FAX machine *originate* a > call, but then *receive* the FAX instead of sending it > (sort of the reverse of what is normal fax behavior)? Yes. Again, the Intel CCP allows you to send out a request for a certain document to the remote fax. I only have experience with the Intel CCP because it's part of my job. -->Chris UUCP: ..tektronix!tessi!escargot!chrisb "I didn't like the Mercury Sable, Phone: (503) 644-3585 (Call anytime!) So I bought a Ford Taurus instead!"
peter@ficc.uu.net (Peter da Silva) (10/03/89)
In article <3609@escargot.UUCP>, chrisb@escargot.UUCP (Chris Bradley) writes: > > On an incoming call, can the gadget differentiate between a modem > > calling, and a fax machine calling? > you tell the CCP to answer with the modem and not the fax is to set the > "ATS0=1" register, for answering on the first ring. This takes care of it. i.e., the answer is NO. > The problem with most fax machines makes your computer become a Fax ONLY. This wouldn't be a problem if you had an operating system on your computer, rather than a glorified program loader. -- Peter da Silva, *NIX support guy @ Ferranti International Controls Corporation. Biz: peter@ficc.uu.net, +1 713 274 5180. Fun: peter@sugar.hackercorp.com. `-_-' "That is not the Usenet tradition, but it's a solidly-entrenched U delusion now." -- brian@ucsd.Edu (Brian Kantor)