IBM 86645RY Hardware Maintenance Manual - Page 100
Rack model, Advanced System Management Interconnect, Knockout, External Connector Knockout
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Rack model DC AC DC AC 1 Advanced System Management Interconnect Knockout: The server has an external connector knockout for the Advanced System Management Interconnect option. This option allows you to connect rack or multirack systems through a daisy-chain cable in half-duplex mode. 2 External Connector Knockout: The server has an external connector knockout that can be used when you install options. 3 PCI Expansion Slots: The server has five available peripheral component interconnect (PCI) expansion slots. Three of the PCI slots support hot-plug PCI adapters. Many adapters provide bus-master capabilities, which enable the adapters to perform operations without interrupting the system microprocessors. 4 Serial A Connector: A serial signal cable for a modem or other serial device connects to this 9-pin serial connector. Serial port A can be shared by the Netfinity Advanced System Management Processor and the operating system. See "Devices and I/O Ports" on page 28 for port assignment information. If you are using a 25-pin signal cable, you need a 9-pin-to-25-pin adapter cable. 5 Serial B Connector: A serial signal cable for a modem or other serial device connects to this 9-pin serial connector. Serial port B is used by the operating system and cannot be shared by the Netfinity Advanced System Management Processor. See "Devices and I/O Ports" on page 28 for port assignment information. If you are using a 25-pin signal cable, you need a 9-pin-to-25-pin adapter cable. 92 Netfinity Server HMM