ZyXEL Communications ES-3124PWR - Manual (Page 36)

Dimension ES-3124PWR Ethernet Switch
3-2 Hardware Connections
Connect the male 9-pin end of the console cable to the console port of the ES-3124PWR switch. Connect the
female end to a serial port (COM1, COM2 or other COM port) of your computer.
3.1.2 Ethernet Ports
The ES-3124PWR has 10/100Mbps auto-negotiating, auto-crossover Ethernet ports. In 10/100Mbps Fast Ethernet,
the speed can be 10Mbps or 100Mbps and the duplex mode can be half duplex or full duplex (100 Mbps only).
When auto-negotiation is turned on, an Ethernet port on the ES-3124PWR switch 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 ES-3124PWR switch determines the connection speed by detecting the
signal on the cable and using half duplex mode. When the ES-3124PWR switch’s auto-negotiation is turned off, an
Ethernet 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.
3.1.3 Gigabit Ports
The ES-3124PWR 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 ES-3124PWR 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 ES-3124PWR determines the connection speed by detecting the signal on the cable and
using half duplex mode. When the ES-3124PWR’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.
Two Gigabit ports for uplink are paired with the two 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 two 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 Ethernet ports on the ES-3124PWR switch are:
o Speed: Auto o Duplex: Auto
o Flow control: On o 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 Ethernet 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.