wodarz@iwu1c.UUCP (Dennis Wodarz) (07/05/84)
Help! I am having difficulty getting a new USR PAssword Modem to function properly at 1200 baud. I have an Apple //e with a Prometheus Versacard as the serial interface. At 300 baud everything works fine (even vi). At 1200 baud however, the data displayed on the screen and also sent to the host is sometimes garbled. Most often newlines are omitted and solid blocks are printed instead of the proper character. Many characters are lost as well. There is some sort of pattern or regularity to the way the data get mangled however. A string of about 240 A's in a file when printed using the cat command appears most of the time as a string of about 100 A's and 90 1's. The Versacard and the jumpers in the modem are set for eleven bit data words (1 start, 8 data, 2 stop). I tried all sorts of dip switch combinations but nothing worked. USR was not much help either. I called them and the person who answered did not have any idea as to what might be wrong. I called him via modem and he said that everything was ok. I did not see any errors at that time either! He was using a ten bit word ( 1 start, 7 data, 1 parity, 1 stop) however. The way I figure it, if everything works fine at 300 baud I must have the jumpers, switches etc. set properly. USR claims that the modem is ok. Anybody have any ideas as to what the problem might be? I also took my WE Dataphone 300/1200 home from work one day and without changing anything but the modem I worked at 1200 baud without any problems. Anybody else ever see this sort of thing? Is there a solution or is there really something wrong with the modem? Any help would be appreciated, -- Dennis Wodarz ihnp4!iwu1c!wodarz 312+979-7971
rb@houxn.UUCP (07/07/84)
You probably are suffering from crummy-lineitis!
Check the line with your local telco and find out if the
bandwidth is sufficient for 1200 Baud. I have used
USR modems for some time and have found them ultra-reliable.
(I've got one running a BBS 24-hours a day!)
Rob Botwin
.....{utah-cs|seismo|decvax}!harpo!eagle!hogpc!houxn!rb
ATT/IS Labs (201) 577-5016 (Cornet 8-270-5016)
FJ 1B-130mats@dual.UUCP (Mats Wichmann) (07/08/84)
Check the line with the telco to see if it is sufficient for 1200
baud? PLEASE, don't bother. They will tell you that you can't
run any kind of data equipment reliably without buying what they
call a `data line', which costs a bunch extra. For service, you
can ask for a line balancing (I think the Password has a switch
for this, also); if you want service on a poor quality line, you
must demonstrate that VOICE quality is poor.
Mats Wichmann
Dual Systems Corp.
...{ucbvax,amd70,ihnp4,cbosgd,decwrl,fortune}!dual!matstggsu@resonex.UUCP (Tom Gulvin Root) (07/19/84)
I had bad luck w/2 USR modems and called them up. After many phone transfers and finger pointing, they said that there was a refit for noisy lines. Sent them both in and 1 week later they were returned and were much better about line noise. Tom Gulvin - Resonex, Inc.