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- Newsgroups: comp.dcom.modems
- Path: news.new-york.net!actcom!news
- From: innovative_technologies@actcom.co.il (innovative technologies)
- Subject: Re: Voice/Fax Modem vs Fax w/Voice
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- Message-ID: <DoJ6Ez.DMv@actcom.co.il>
- Sender: news@actcom.co.il (News)
- Reply-To: innovative_technologies@actcom.co.il
- Organization: innovative technologies
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- References: <4hl7jf$h9p@news.sas.ab.ca> <4hvov4$s4c@piglet.cc.uic.edu>
- Date: Tue, 19 Mar 1996 21:04:50 GMT
-
- yaojun@tigger.uic.edu (John) wrote:
-
- >Redirecting a fax and voice call is a little complicated issue. The
- >main reason for that is the way poeple sending faxes and the way a fax
- >machine sending fax. In general, there are two way to send a fax:
-
- >1. manual dialing in which poeple pick up the hand set or push the
- >Speaker Phone/On Hook Dial button and then dial. Faxes sent this way
- >nerver send a calling tone (CGN), a slow repeating beep, wich is a key
- >signal that recieving fax machine/modem is waiting to switch to fax
- >mode. So manual dialing usually invokes the voice part from the
- >recieving side. Some fax machine added a silent detect feature which
- >will detect the length the silent after it pick up the call. If
- >nobody speaks for about 3 seconds it will switch to fax mode and send
- >out recieving tone( a high frequency squeese).
-
- >2. Automatic dialing in which people dialing by push a button with a
- >number prestored or a timed fax, or redial the fax machine is always
- >send a CGN, which always invoke the fax part of the recieving side
- >and cause the recieving part to send a recieving tone.
-
- >So if a fax is sent by automatic dialing any recieving device with
- >automatic switch function can redirect the fax to fax. But if the
- >fax is sent by manual dialing the recieving device depending the mode
- >you set will either treat the incoming call as fax(if you set it as
- >fax mode) or treat it as voice call(if you set it at manual or
- >automatic mode).
-
- >Since different manufacturers have different design for above issue it
- >is very difficult to efficiently to redirect fax and voice call in one
- >phone line. A better solution is order a distinctive ringing service
- >from your phone company which give you another number for the same
- >line. The added number has a new patten of ringing. If you assign this
- >ring patten to fax/modem and when a ring of new patten rings you will
- >know it is a fax or a modem call and need not to pick up. The best
- >solution which is what I currently use is to add a ring reader( a
- >small device connected in between your phone/modem/fax and wall
- >outlet. The ring reader will recoganize the ring pattern and redirect
- >fax call to fax and voice to voice!
-
- >Hope this helps!
-
- >-John
-
-
- >smithr@freenet.edmonton.ab.ca () wrote:
-
- >>After three voice/fax/data modems, I am discouraged with the technology's
- >>inability to reliably differentiate between voice and fax calls. Now, I
- >>am on the verge of buying a Fax machine that has digital voice mail.
-
- >>Does anyone know if the technology is any different in a fax machine with
- >>voice mail than what is in a voice/fax/data modem. In short, will I have
- >>the same problems differentiating between voice and fax calls.
-
- >>Also, there are devices that hook up to the phone lines that simply split
- >>up a call and route them to TAD's, faxes and modems. Is this the same
- >>technology too? Is it any more reliable than the aforementioned devices?
-
- Take a look at http://www.israel.net/innovative/ and you might find
- some interesting info on the subject of Voice Modem quality...
-
- best regards,
-
- Innovative Technologies
- email: innovative_technologies@actcom.co.il
- WWW: http://www.israel.net/innovative/
-
- (note: please send email in addition to post here).
-
-