Relic Information query matches

Matching on query: Unique id = 41/97, Name = any, Associated machine = any, class = any


Unique id/year of acquisition: 41/97
Name: Ring monitor station
Ring monitor station
Ring monitor station
Other nos on object: none
Inscription: many small printed labels
Dimensions: 583x375x100
Description: Black metal and plastic box. Carrying handles at ends. Top in three sections. On right with many switches, LEDs, a knob and two chips (?), many paper labels. Middle section has plastic window with printed paper information visible. This section slides back to reveal interior - much wire-wrapping, and power transistor. Small section at bottom with pins visible. Left narrow section of top with on and off buttons (so marked) and LED. Sockets and power plug input at left end.
Class: network
Machine: Ring
Condition: good
Notes:
DW: This was one of the so called monitor stations for the Ring. It set up a system of packets which were circulated right round the Ring, it detected when they came back, it checked that they came back correctly and it also controlled the turn-on sequence when the Ring was powered up initally by setting up the packet sequence and gaps between the end of the packet sequence and the start. It had a few testing circuits inside. It could also send random - fill empty packets with random data and check that if they came back empty the random data was correct. So it maintained a continuous check on the stability and working of the Ring. It was also used occasionally to make modifications which otherwise would have to be done in every single repeater right round the Ring. So it allowed minor updatings of design without particular inconvenience. On the front there is a description of a packet - there are various control switches which are mostly for engineers because once it was powered up it required no switch operation at all. But it did enable various tests to be made. It was a relatively big unit but fairly empty. There was a typical wire wrapping system which was used for inter-connections. In our case, unlike industrial people, we have colour coding on the wire, so it was fairly easy to trace. The box, although large is mainly empty - you can't see quite in, and this was held in the workshop to run on the Ring and it was hung on a wall. There is really very little else to say, it was just used as it says as a monitor of the Ring's performance and for starting it up.
Q: The label says 1980 - would that seem about the right date?
DW: Yes, I think we started on the Ring before then probably had something working but this is probably when this particular one was made which would not have been the first one when we were running the Ring.
Q: And did anyone design it in particular or was it a group effort?
DW: I think I did the logical design, Norman Unwin did the physical design and power supplies and things like that and it was made in the workshop.
See also: 11/97
See also: 48/97
See also: 110/99


Number of matches = 1 Copyright University of Cambridge Computer Laboratory, 1999. All rights reserved.