ZyXEL Communications ZyXEL Dimension ES-2024 - Manual (Page 32)

Dimension ES-2024 Ethernet Switch
3-2 Hardware Connections
turns off this feature, the ES-2024 switch determines the connection speed by detecting the signal on the cable and
using half duplex mode. When the ES-2024 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.
Default Ethernet Negotiation Settings
The factory default negotiation settings for the Ethernet ports on the ES-2024 switch are:
o Speed: Auto o Duplex: Auto
o Flow control: Off 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.
3.2.2 Gigabit Ports
These two electrical RJ-45 Ethernet interfaces are for use with the following copper Ethernet cables:
100Base-Tx 2 pair UTP Cat. 5, up to 100m
1000Base-T 4-pair UTP Cat. 5, up to 100m
Each gigabit port is paired with a mini GBIC slot. The switch uses up to one connection for each pair for a total of
two possible gigabit connections (one from each of the two pairs). The switch uses whichever connection first
establishes a link. If the connection’s link goes down, the switch uses the other connection if it can establish a link.
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 ES-2024 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.
To avoid possible eye injury, do not look into an operating fiber-optic module’s connectors.
Type: SFP connection interface
Connection speed: 1 gigabit per second (Gbps)