Gigabit Ethernet Ports - ZyXEL Communications VES1724-56 User Manual

To connect power to the Switch, insert the female end of the power cord to either the AC or DC
power receptacle on the front panel, depending on your power source. Connect the other end of the
supplied power cord to a power outlet.
The dual power connector model has both AC and DC power connectors. See Figure 7. In this
model,
• for the AC power connection, use AC power supply input of 100 VAC to 120 VAC with 50/60 Hz ±
3 Hz, 1.4 A maximum no tolerance or 220 VAC to 240 VAC with 50/60Hz ± 3 Hz, 1 A maximum
no tolerance.
• for the DC power connection, use DC power supply input of -36 VDC to -72 VDC, 2 A maximum
no tolerance.
Note: Do NOT make both AC and DC power connections at the same time. Turn the DC
power off if you are using the AC power connection or are not using the device.
Disconnect the AC power before you install the DC power module.
See Chapter 47 on page 381

3.1.2 Gigabit Ethernet Ports

The Switch has 1000Base-T auto-negotiating, auto-crossover Ethernet ports. In 10/100/1000 Mbps
Fast Ethernet, the speed can be 10 Mbps, 100 Mbps or 1000 Mbps and the duplex mode can be half
duplex or full duplex.
An auto-negotiating port can detect and adjust to the optimum Ethernet speed (10/100/1000
Mbps) and duplex mode (full duplex or half duplex) of the connected device.
An auto-crossover (auto-MDI/MDI-X) port automatically works with a straight-through or crossover
Ethernet cable.
Two of the 1000Base-T Ethernet ports are paired with a mini-GBIC slot to create a dual personality
interface. The Switch uses up to one connection for each mini-GBIC and 1000Base-T Ethernet pair.
The mini-GBIC slots have priority over the Gigabit ports. This means that if a mini-GBIC slot and
the corresponding GbE port are connected at the same time, the GbE port will be disabled.
When auto-negotiation is turned on, a 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, thus
requiring you to make sure that the settings of the peer Ethernet port are the same in order to
connect.
3.1.2.1 Default Ethernet Negotiation Settings
The factory default negotiation settings for the Gigabit ports on the Switch are:
• Speed: Auto
• Duplex: Auto
• Flow control: Off
• Link Aggregation: Disabled
VES1724-56 User's Guide
for information on the Switch's power supply requirements.
Chapter 3 Hardware Overview
27