Bruce Dudley wrote in a message to All:

 BD> Calles to my BBS who use 2400 cannot connect to my BBS at 2400. My
 BD> modem which is answering _always_ drops to 300baud. Why?

 BD> It's not my front end 'Binkley' 'cause just using a std comms
 BD> program with the modem set to answer [ats0=2] is still occures.

 BD> The modem is an Xstreama 28800 Fax/Data modem. I have just spent
 BD> the last three or so hours reading the manual and trying diffrent
 BD> configurations. If the other end [the caller] forces ATF5 on his
 BD> modem, mine will answer the phone and just screech away till the
 BD> cows come home. I need to turn off the modem to drop the line. No
 BD> connection is made in this instance.

i had the same problem herw with two industry standard modems, one being my
micrcom deskporte fast + and the other being a dataplex dpx224 i verified
this with dataplex here in sydney.

briefly, what happens is that the 2400 baud modem listens to all the noises
that the 28k8 modem makes and fails to discriminate what it is hearing and
drops back to the lowest common denominator .. while in term the 28k8 is
doing the same sort of thing but for a slightly different reason (it sings
its are you there song and nothing answers, falls back etc) both modems
meet at 300 and connect.

only difference in my case was that one of the modems connected at some
strange protocol that managed to scramble the characters coming through.
anyway in short this problm is only going to get worse and as ecommended to
me by the dataplex techie was to recommend the 2400 baud owner to get a
more recent modem. after talking to a few other local thecnicial types this
seems to be the most plausible reason and hence the best line of action, an
unfortunate sign of the times.


 BD> If the caller just calls as he would do in normal connections to a
 BD> BBS, ie using his std modem init string, my modem will always fall
 BD> back to 300baud. 

 BD> I tried in my modem the string AT+MS=11,1,2400,28800. Made _no_
 BD> diffrence at all. [Does this only affect outgoing calls?] Also
 BD> tried AT+MS=11,0,2400,28800 [note the zero] and the modem will not
 BD> even connect at 300baud, just sits there screeching away.

thats what happens here when the old 2400 brigade rings in .. i have a few
users who use dataplex dpx224's manufactured in about 1987 ish, thes and
prior have the listening bits that are effectively tone deaf .. ad seeing
as dataplex discontinued the dpx224 in about july or november of las year i
don't think that thier are any plans for an upgrade rom .. grin.

 BD> As an aside, I used to have a DynaLink modem 14400k [now used on my
 BD> other BBS, Z-Node] Apart from it's problem with 'busy' and 'no
 BD> dialtone' problems, it works very well. Indeed, even had FAX
 BD> reception set in Binkley and all worked OK. Not so with the
 BD> Xstream. I have never yet been able to receive a FAX with the
 BD> Xstreama.

sorry no clues about the fax, maybe in a couple of monhts when i get one
but not just at the moment.

 BD> Callers > than 2400 is never a problem even upto 28k with the
 BD> Xstreama! 

 BD> Anybody got any ideas please...

line noise could be helping the 2400 to be more hard of hearing than
usuall. not only have i seen this with the dataplex dpx 224 and microcom
but the old maestro zxr2400's with the microcom deskporte fast + as well as
the ep (the new one which no longer dose class 2 fax, most disapointed ..
that's why i'm looking at the xstreama) 

how have you found the xstreama otherwise ??

regards ... jonathan

EMail: jmichaels{at}caamora.com.au

---