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- Path: inforamp.net!usenet
- From: Thomas Malcolmson <tmm@inforamp.net>
- Newsgroups: comp.dcom.modems
- Subject: Re: USR 33.6 Data/Fax: Won't work with WinFax
- Date: Thu, 14 Mar 1996 00:06:27 -0500
- Organization: InfoRamp Inc., Toronto, Ontario (416) 363-9100
- Message-ID: <3147A953.6F00@inforamp.net>
- References: <4hqfgu$gq0@fountain.mindlink.net> <4i1mn2$28v@tracy.protocom.com> <klein-1103961224090001@unix-ppp3.chromatic.com>
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-
- My experience with USR & WinFax suggests that the CNG tone requirement
- is not the problem.
-
- I have used WinFax 3, 4, & 7, with many 14.4 & 28.8 USR modems and have
- always had intermittant problems sending and receiving. My problems are
- very inconsistent: some destinations might give me more trouble than
- others, but even the worst work sometimes, and even the best don't at
- other times. This result seems incompatible with the CNG tone problem.
-
- I have spent a lot of time on this problem over the last few years, and
- am very frustrated (I won't get into why I have had to stick with USR -
- I'll just say that I recommend them for data, but not for faxing or
- support).
-
- My best guess is that the fax hardware in USR modems is just not up to
- the sensitive timing requirements of faxing. The most common error I
- get is 'unable to negogiate connection or train.'
-
- I'll put together a list of all the init strings, tweaks, and
- modifications that have helped (but only a bit) me recently, and I would
- be very grateful if anyone could suggest something that would help me
- really solve this problem
-
- Tom
-
- Mike Klein wrote:
- >
- > 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
-