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Installing the 128-Port Async Adapter
The 128-port async adapter is an option for the HMC. It must be configured by the service representative
when the HMC is installed. The 128-port async adapter software is included in the HMC base software
installation package.
This adapter provides the control function and connectors to attach eight 16-port remote async nodes
(RANs). When all eight nodes are attached, this combination provides 128 EIA-232 or RS-422
communication ports.
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.
Adapter Line 2
Node
1
1
Adapter Line 1
Node
1
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.
Node
4
2
2
Node
Node
3
2
3
Appendix E. Attaching Multiple pSeries 670s to One Hardware Management Console
3
RAN Node
4
Terminators
57
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