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14 ULTRACONSOLE INSTALLATION AND OPERATIONS MANUAL

Switch Installation – Multiple units – “RING” topology

A “RING” configuration is usually used when a user needs access to all computers from different KVM stations. In a

“RING” configuration, a user on any KVM station in the ring can access all the computers in the system. Connect

conflicts can occur with multiple users unless model

UC2-1X16U/E is used for unit #2 or #3. (See Appendix F)

Figure 4. Ring configuration

The Units in Figure 4 can be any UltraConsole model

The “RING” installation procedure is very similar to installing a “BUS” configuration with the exception of removing

jumper JP1 on the expansion cards on two Units and adding an expansion cable from the first Unit to the last Unit.

This additional expansion cable from the first Unit to the last Unit creates the “RING”.

All Units must be equipped with an expansion card. To begin setting up your system in a “RING” configuration,

perform steps 1 – 13 as outlined in setting up a “BUS” configuration. When doing this, keep in mind that the “OUT”

expansion card connector on the first Unit will be connected with an expansion cable to the “IN” expansion card

connector on the last Unit to complete the “Ring”.

Jumper JP1 must be removed from the expansion cards on two Units in the system to properly maintain cable

termination. To identify which Units must have jumper JP1 removed, calculate the total cable length around the

“RING”. This is from Unit #1’s “IN” connector, around the “RING” and back to Unit #1’s “OUT” connector.

A KVM station on

any Unit can

access all

computers.

JP1

off

JP1

off

Unit #3

CPUs

33 - 48

Unit #2

CPUs

17 – 32

Unit #1

CPUs

1 – 16

KVM station

CPU

Cable

KVM

Cable

CPUs

In the example used in Figure 4, removing jumper JP1 on Unit #1

and #3 divides the total ring cable length approximately in half.

Unit #3 (IN) to Unit #1 (OUT) = 20’

Unit #3(OUT) to Unit #2 (IN), Unit #2 (OUT) to Unit #1 (IN) = 20’.

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