IBM 867431X Hardware Maintenance Manual - Page 116
Advanced System Management ports, Working with cables, Management Port Serial port A, RS-485 ports
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100BASE-TX devices. Table 20. Ethernet RJ-45 connector pin-number assignments. Pin Signal Pin Signal 1 Transmit data+ 5 Not connected 2 Transmit data- 6 Receive data - 3 Receive data+ 7 Not connected 4 Not connected 8 Not connected Advanced System Management ports There are two kinds of Advanced System Management ports: a Management port (Serial port A), and RS-485 ports. Management Port (Serial port A) This port uses a standard D-shell serial-port connector, labeled A on the rear of the server/workstation. You can attach a dedicated modem to the D-shell connector on the rear of the server/workstation to communicate with the integrated Advanced System Management Processor. For more information see "Serial port" on page 103. RS-485 ports The RS-485 ports on the rear of the server/workstation enable you to connect the Advanced System Management Processors of several rack-mounted server/workstations so that they can communicate with each other in half-duplex mode. Working with cables The server has two different cabling options: the ASM bus and the Cable Chain Technology (C2T). The following sections discuss each of these options. While reading about these options, keep in mind that they are independent of each other. 108 Hardware Maintenance Manual: xSeries 330 Type 8674, IntelliStation R Pro Type 6851, and Network Equipment Building System Type 8674