[mod.telecom] Burroughs DC problem

scotto@crash.UUCP (11/05/85)

Greetings..
 
I am having some problems on my mainframe system that I can't seem
to get solved.  I am hoping someone has had a similar problem. (and found
a fix).
 
I am using a Burroughs B1985 system with 15 DC lines in 2 MLC's
(multi line controls) all running synchronous or TDI.  The problems
seem to be on the 4800 bps sync lines only.  It seems that Burroughs
has a hardware jumper for "4800 and below -or- 4800 and above" speeds
even though the line adapter is EXTERNALLY clocked.  My problem is
that at the end of a block of data, AFTER the BCC and where the first
PAD (FF) character should be is an extra character.  Most of the time
it is a "~" (FE) or a "|" (FC), causing a parity error. Actually it is
only dropping one or two bits from being a PAD, but the parity error
is there.
 
Naturally Burroughs has been no help, they say "If the terminal doesn't
see it, it's okay".  Monitoring the line for trouble is almost impossible
at 9600 because I can't catch the error unless I am watching the monitor
continuously.
 
Any ideas ?
 
 
Scott O'Connell
Data Systems of San Diego
 
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