@device[x2700]
@make[report]
@flushleft[@B{EDINBURGH UNIVERSITY COMPUTING SERVICE}]
@flushleft[For the Attention of the E.C.U.C.]
@majorheading[Report on Communications]
@Section[General]
@Section[CPSE]
For the past 3 months
@begin[verbatim]
                   S/W       H/W                   S/W & H/W        Total
                 Crashes   Crashes  Environmental    MTBF            MTBF

KB  GEC 4190        1         0           0         91 days        92 days

AT  GEC 4190        0         2           0         46 days        46 days

AT  GEC 4160        0         0           0        >92 days        >46 days
@end[verbatim]
The AT switch had 5 hours down time due to a disc fault.
@Subsection[TelePAC Switches]
For the past 3 months
@begin[verbatim]
                   S/W       H/W                    S/W & H/W        Total
                 Crashes   Crashes  Environmental     MTBF            MTBF

TelePAC  1 (KB)    0         0            0          > 92 days    > 92 days

         2 (KB)    0         0            0          >127 days    > 92 days

         3 (Bush)  0         0            1          >127 days      92 days
@end[verbatim]
A TelePAC switch has been installed at Appleton Tower.
@subsection[Camtec]
A solution has been found to the crashes due to mains noise.  This requires
modification to all the data cable plugs at the PAD and so it will take a
considerable time to modify all the PADs.  As a first step, the least reliable
PADs are being modified first.

The MTBF of the PADs up to the end of October was over 38 days, since then
there have been a number of crashes early in the morning caused by a change to
system software on the ITS63B machine which was used to run the PAD management
program.
@subsection[Netcomm]
Five Netcomm Super PADs have been purchased, the first of which has been
installed in the Graphics Workshop.
@section[FEPs]
The reliability of the FEPs has improved since the last report but there has
been some problems with the Auscomm channel interface though this fault has
usually only occured during the night.
@section[INFO]
Torch has provided a new version of the X.25 package and Unix kernal
subsequently the INFO machine has now been up for the past 800 hours.
@Section[PSSE]
A Torch XXX is being purchased to act as a replacement PSS Gateway.  Work is
currently proceeding in the specification of the software.
@flushright[Brian Gilmore
16th November 1987.]