home *** CD-ROM | disk | FTP | other *** search
- Path: unix-ppp3.chromatic.com!user
- From: klein@chromatic.com (Mike Klein)
- Newsgroups: comp.dcom.modems
- Subject: Re: USR 33.6 Data/Fax: Won't work with WinFax
- Date: Mon, 11 Mar 1996 12:24:09 -0800
- Organization: Chromatic Research, Inc.
- Message-ID: <klein-1103961224090001@unix-ppp3.chromatic.com>
- References: <4hqfgu$gq0@fountain.mindlink.net> <4i1mn2$28v@tracy.protocom.com>
- NNTP-Posting-Host: unix-ppp3.chromatic.com
- Mime-Version: 1.0
- Content-Type: text/plain; charset=US-ASCII
- Content-Transfer-Encoding: 7bit
- X-Newsreader: Yet Another NewsWatcher 2.1.8
-
- In article <4i1mn2$28v@tracy.protocom.com>, dquin@pclink.com (Daniel A.
- Quinlan) wrote:
-
- > In article <4hqfgu$gq0@fountain.mindlink.net>, ghelm@mindlink.bc.ca says...
- > >
- > >Hi,
- > >
- > >Just purchased a USR Sprotster 28,800 Data/Fax modem. Works just fine for
- > >my slip connections but I have not been able to get it working with
- > >WinFax.
- > >
- > >Anyone else have this problem and/or solution?
- > >
- > >- Glenn
- > >
- >
- > Hi Glenn:
- >
- > I too once owned a Sportster 33.6 model and returned it perhaps
- because of a
- > problem you are having and I did have. The problem,as I understand it, is
- > relatively simple--the Sporster V.34+ will not receive faxes from ANY fax
- > machine that does not issue its negotiation tone first.
-
- Wow, I just (JUST! 5 minutes ago!) posted the following to alt.fax. Same
- all around. I forwarded a copy of it to USR tech support over email also.
-
- -Mike
-
- ------------------------------
- In article <4hgclb$9qm@usenet.srv.cis.pitt.edu>, simst2+@pitt.edu (Sidney
- Mullen) wrote:
-
- > Winfaxpro v.3 great for sending faxes but fails to handshake with some
- > machine fax transmission. It does receive OK on others. I'm using a
- > new Robotics Sportstar 28.8 I am a reasonably experienced computer
- > user. (Windows 3.1 8megs ram. 486/d66)
- > Any info deeply appreciated.
-
- This does not seem to a problem specific to your situation. I am on a Mac
- using a different fax package (obviously :-) and have the same problem.
- I am scouring Usenet and Web for info to help and don't have much light
- to shed yet. It has been a good 2 months now since anyone we know has
- been able to send us a fax.
-
- I recently spent a good part of a morning (and probably $20+) calling USR
- tech support on this exact problem. I got to a "level 2" tech support person
- (level 1 couldn't answer the problem) who decided it appeared to be something
- beyond basic setup and set out to try sending me about half a dozen short
- faxes from various machines and modems around the USR building. About half
- of them made it, including the first one he tried sending, which was from
- a USR 33.6 modem he was using. Clearly the point is that half of them
- didn't make it. He was going to note it and get back to me if he found
- anything more out.
-
- I then followed up with an email to support saying that I was quite
- unsatisfied with my modem since we were unable to use it for receiving
- faxes, and referenced my call number that was logged during the previous call.
- I did get a response, saying that USR modems are compatible with the ITU-T
- specifications, which state that it is the responsibility of the sending
- machine to send a CNG tone to the receiving machine in order to start the
- negotiating process.
-
- I happen to work at a multimedia company that implements modems in software,
- and the lead of that team says this on this topic:
-
- ... The calling tone (CNG) is only required
- for faxes that are automatically originated. Manually originated faxes
- need not send the CNG tone. The idea is that CNG is needed for automatic
- calls so that if there is a wrong number, the called party won't think
- they're getting an obscene phone call. On the other hand, if the call
- is manually originated, the originator can hear that grandma has answered,
- and will pick up the handset and apologize.
-
- There is a feature that is included with many fax/modems that will
- "automatically" detect if an incoming call is a fax or a data call by
- listening for the CNG tone. If the modem hears the CNG tone, then the
- incoming call is clearly a fax call, otherwise it assumes that it is
- a data call.
-
- Now, if the modem has already been configured to answer as a fax, then
- it shouldn't need to hear the CNG tones in order to answer, for, in fact,
- there is no guarantee that an originating fax will emit CNG. Most
- faxes do even if they are manually originated, but not all of them do.
-
- This is yet another example of goofy compatibility issues associated
- with modems.
-
- So, Mike, I think you got bad information from USR, but what else
- did you expect?
-
- So it would appear the maybe USR is implementing the standard to the letter (?)
- but in practical configurations it simply doesn't work.
-
- Hope this can be addressed somehow or another. The modem sure works fine
- otherwise.
-
- -Mike Klein
- klein@chromatic.com
-