ZyXEL Communications XS3800-28, Руководство пользователя, Страница: 46 / 789

Chapter 3 Hardware Panels
XS3800-28 User’s Guide
46
3.1.1 Ethernet Ports
The Switch has 10GBase-T auto-negotiating, auto-crossover Ethernet ports. In 10/100 Mbps / 1/10 Gbps
Gigabit Ethernet, the speed can be 10 Mbps, 100 Mbps, 1 Gbps or 10 Gbps. The duplex mode can be
full duplex at 100 Mbps and full duplex only at 1000 Mbps.
An auto-negotiating port can detect and adjust to the optimum Ethernet speed (100M, 1G, 2.5G, 5G,
and 10G) and full duplex mode of the connected device.
An auto-crossover (auto-MDI/MDI-X) port automatically works with a straight-through or crossover
Ethernet cable.
When auto-negotiation is turned on, an Ethernet port 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 Switch determines the connection speed by detecting the signal
on the cable and using half duplex mode. When the Switch’s auto-negotiation is turned off, an Ethernet
port uses the pre-configured speed and duplex mode when making a connection, thereby requiring
you to make sure that the settings of the peer Ethernet port are the same in order to connect.
3.1.1.1 Default Ethernet Negotiation Settings
The factory default negotiation settings for the Ethernet ports on the Switch are:
• Speed: Auto
• Duplex: Auto
• Flow control: Off
• Dual Personality Interface: Fiber optic module first
3.1.2 SFP/SFP+ Slots
The transceiver slots are for Small Form-Factor Pluggable (SFP), SFP+ transceivers or DAC (Direct Attach
Copper) cables. The SFP+ (SFP Plus) and the DAC cable are enhanced versions of the SFP and support
data rates of up to 10G. A transceiver is a single unit that houses a transmitter and a receiver. Use a
transceiver or a DAC cable to connect a fiber optic cable to the Switch. The Switch does not come with
transceivers nor DAC cables. You must use transceivers or DAC cables 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 or the DAC cables while the Switch is operating. You can use different
transceivers to connect to Ethernet switches with different types of fiber optic connectors.
• Type: SFP connection interface
• Connection speed: 1 or 10 Gigabit per second (Gbps)
RESET Press the RESET button to reboot the Switch without turning the power off.
RESTORE Press the RESTORE button for 3 to 6 seconds to have the Switch automatically reboot and
restore the last-saved custom default file.
Press the RESTORE button for more than 7 seconds to have the Switch automatically reboot
and restore the factory default file.
Table 5 Panel Connections (continued)
CONNECTOR DESCRIPTION