128-Port Async Adapter Line Connectors - IBM pseries 690 Installation Manual

128-Port Async Adapter Line Connectors

The 128-port async adapter contains two 15-pin D-shell connectors. The connector that is closest to the
edge connector that plugs into the HMC is line 1. The RANs are cabled in a daisy chain and are
terminated using a line terminator. The following illustration shows the adapter and the line connectors.
2
1
3-C
The following illustration shows an example of a typical RAN configuration. In this example, RANs are
connected to both line 1 and line 2 of the adapter.
1 RAN Nodes
2 RAN Nodes
v Up to eight RANS can be attached to one adapter total. If four are attached to line one, then only four
more can be attached to line 2.
v RANs must be numbered in ascending order. The RAN closest to the adapter is assigned as node 1.
No gaps in the numbering should occur. Example, numbering RANs as 1, 3, 4 in a line will cause
configuration problems.
Adapter Line 2
Node
1
1
Adapter Line 1
Node
1
Appendix E. Attaching Multiple pSeries 690s to One Hardware Management Console
Node
4
2
2
Node Node
3
2 3
3 RAN Node
4 Terminators
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