ZyXEL Communications ES-1124 - Manual (Page 20)

Dimension ES-1124 Ethernet Switch
2-4 Hardware Description and Installation
Figure 2-5 The Front Panel of the ES-1124
2.5.1 10Base-T/100Base-TX RJ-45 auto-negotiating ports
Your switch comes with 24 crossover 10Base-T/100Base-TX RJ-45 ports. The auto-
negotiation feature allows the switch to detect the speed of incoming transmission and
adjust appropriately without manual intervention. It allows data transfers of either 10
Mbps or 100 Mbps in full-duplex mode.
2.5.2 Auto-crossover MDI/MDIX ports
RJ-45 Ports (Auto MDI/MDIX): 24 auto-crossover 10/100 10Base-T or 100Base-TX
connections.
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.
2.5.3 Gigabit uplink ports
Two Gigabit uplink ports: two auto detecting Giga uplink ports — UTP (unshielded
twisted pair) or Gigabit fiber.
Note that when you connect the Mini GBIC to the switch, you
must disconnect the Giga copper connection if you have
connected it to the device. Otherwise, the switch will not detect
the Mini GBIC. While you using Giga copper port or Mini GBIC
port, only one of them will work, for example, when a Giga copper
port is connected, the Mini GBIC will be disabled.