ZyXEL Communications Dimension GS-3012F, Руководство пользователя

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GS-3012F User’s Guide
3-2 Hardware Connections
VT100 terminal emulation 9600 bps
No parity, 8 data bits, 1 stop bit No flow control
Connect the male 9-pin end of the console cable to the console port of the GS-3012F switch. Connect the female
end to a serial port (COM1, COM2 or other COM port) of your computer.
3.2.2 Gigabit Ports
The GS-3012F has four 100/1000Mbps auto-negotiating, auto-crossover Gigabit ports. The speed of the Gigabit
ports can be 100Mbps or 1000Mbps and the duplex mode can be half duplex (at 100 Mbps) or full duplex.
When auto-negotiation is turned on, a Gigabit port on the GS-3012F negotiates with the peer automatically to
determine the connection speed and duplex mode. If the peer Ethernet port does not support auto-negotiation or
turns off this feature, the GS-3012F determines the connection speed by detecting the signal on the cable and using
half duplex mode. When the GS-3012F’s auto-negotiation is turned off, a Gigabit port uses the pre-configured
speed and duplex mode when making a connection, thus requiring you to make sure that the settings of the peer
Ethernet port are the same in order to connect.
Four Gigabit ports are paired with the four mini GBIC slots. The switch uses up to one connection for each pair for
a total of four possible Gigabit connections (one from each of the four pairs). The mini GBIC ports have priority
over the Gigabit ports. This means that if a mini GBIC port and the corresponding Gigabit port are connected at the
same time, the Gigabit port will be disabled.
Default Ethernet Negotiation Settings
The factory default negotiation settings for the Gigabit ports on the GS-3012F are:
• Speed: Auto • Duplex: Auto
• Flow control: On • Link Aggregation: Disabled
Auto-crossover
All ports are auto-crossover, that is auto-MDIX ports (Media Dependent Interface Crossover), so you may use
either a straight-through Ethernet cable or crossover Ethernet cable for all Gigabit port connections. Auto-crossover
ports automatically sense whether they need to function as crossover or straight ports, so crossover cables can
connect both computers and switches/hubs.
3.2.3 Mini GBIC Slots
These are slots for mini GBIC (Gigabit Interface Converter) transceivers. A transceiver is a single unit that houses a
transmitter and a receiver. The GS-3012F does not come with transceivers. You must use transceivers that comply
with the Small Form-factor Pluggable (SFP) Transceiver MultiSource Agreement (MSA). See the SFF committee’s
INF-8074i specification Rev 1.0 for details.
You can change transceivers while the switch is operating. You can use different transceivers to connect to Ethernet
switches with different types of fiber-optic connectors.