IBM pseries 655 Installation Manual page 34

Notes:
a. Two ports on the 8-port asynchronous adapter must be configured as RS422 ports and connected
to the BPCs in the rack. To configure these two ports as RS422 ports, refer to the IBM Hardware
Management Console for pSeries Installation and Operations Guide. Any remaining ports on the
8-port asynchronous adapter can used as RS232 connections to HMC ports on managed
processor subsystems.
b. The cable from the HMC should be plugged into connector J00B on the BPC. (If the cable is found
to be plugged into J00A it should be moved to J00B.) If a High Performance Switch is installed in
or connected to the system, the cable from the HMC must be connected to J00B or the HPS will
not operate correctly.
2. Connect the HMC serial cable to serial port HMC1 on the rear of the processor subsystem. For two
HMCs, connect the redundant HMC into serial port HMC2 on the processor subsystem.
The use of the second serial port on the HMC is not recommended because this port defaults to be
used for the modem.
3. If you are connecting cables from the HMC to processor subsystems in the rack in more complicated
configurations, refer to "System Cabling" on page 22 to determine cable connections and routing.
If you are connecting HMC(s) to the system using an 8-port asynchronous adapter, go to "Install and
Configure an 8-Port Asynchronous Adapter" on page 24.
If you are connecting HMC(s) to the system using an 128-port asynchronous adapter, go to "Install and
Configure an 128-Port Asynchronous Adapter" on page 25.
Note: The following illustration shows:
v A simplified configuration connecting a primary and secondary (optional) HMC to a processor
subsystem
v The location of the serial ports on the rear of the HMCs and the HMC connectors located on
the processor subsystem
v The connection of the 8-port adapters to the HMCs
v The connection of the 8-port adapters to the BPC (side A and side B) with an RS422 cable
18 Eserver pSeries 655 Installation Guide