Chapter 1 BayStack 420 Switch 27Using the BayStack 420 10/100/1000 SwitchThe Console port is a DB-9, RS-232-D male serial port connector. You can usethis connector to connect a management station or console/terminal to theBayStack 420 Switch by using a straight-through DB-9 to DB-9 standard serialport cable. You must use a VT100/ANSI-compatible terminal (for cursor controland to enable cursor and functions keys) to use the console port. See Installing theBayStack 420 10/100/1000 Switch for more information.The Console port default settings are: 9600 baud with eight data bits, one stop bit,and no parity as the communications format, with flow control set to enabled.Gigabit Interface Converter (GBIC)Gigabit Interface Converters (GBICs) are hot-swappable input/outputenhancement components designed for use with Nortel Networks products toallow Gigabit Ethernet ports to link with fiber optic networks.Port connectorsThe BayStack 420 Switch uses 10BASE-T/100BASE-TX RJ-45 (8-pin modular)port connectors.The 10BASE-T/100BASE-TX port connectors are configured as MDI-X(media-dependent interface-crossover). These ports connect over straight cablesto the network interface card (NIC) in a node or server, similar to a conventionalEthernet repeater hub. If you are connecting to an Ethernet hub or Ethernet switch,use a crossover cable unless an MDI connection exists on the associated port ofthe attached device (see “Appendix D, “Connectors and pin assignments,” onpage 195).The BayStack 420 Switch uses autosensing ports designed to operate at 10 Mb/s(megabits per second) or at 100 Mb/s, depending on the connecting device. Theseports support the IEEE 802.3u autonegotiation standard, which means that when aport is connected to another device that also supports the IEEE 802.3u standard,the two devices negotiate the best speed and duplex mode.Note: The console port is configured as a data communicationsequipment (DCE) connector. Ensure that your RS-232 cable pinouts areconfigured for DCE connections (see Appendix D, “Connectors and pinassignments,” on page 195).
