UNICOM Electric SmartGST-2402M - Manual (Page 5)

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Ethernet Switching Technology
Ethernet Switching Technology dramatically boosted the total bandwidth of a
network, eliminated congestion problems inherent with Carrier Sense multiple
access with Collision Detection ( CSMA/CD ) protocol, and greatly reduced
unnecessary transmissions.
This revolutionized networking. First, by allowing two-way, simultaneous
transmissions over the same port ( Full-duplex ), which essentially doubled the
bandwidth. Second, by reducing the collision domain to a single switch-port, which
eliminated the need for carrier sensing. Third, by using store-and-forward
technology to inspect each packet and intercept corrupt or redundant data.
Switching eliminated unnecessary transmission that slows the network. Address-
learning was employed to replace the inefficient receiving port.
Auto-negotiation regulates the speed and duplex of each port, based on the
capability of both devices. Flow-control allows transmission from a 100Mbps node
to a 10Mbps node without loss of data. Auto-negotiation and flow-control may need
to be disabled for some network applications involving legacy equipment. Disabling
the auto-negotiation is accomplished by fixing the speed or duplex of a port.
Ethernet Switching Technology supplied higher performance at lower costs than
other solutions. Wider bandwidth, no congestion, and the reduction in traffic is why
switching is replacing expensive routers and inefficient hubs as the ultimate
networking solution. Switching brings a new way of thinking to networking.
Hardware Description
This Section describes the hardware of the SmartGST-2402M and gives a physical and
functional overview of this Switch.
The physical dimensions of the SmartGST-2402M are: 440mm x 160mm x 44mm (
L x W x H )
Front Panel
The Front Panel of the SmartGST-2402M consists of twenty-four 10/100Base-TX
RJ-45 ports ( Auto MDI/MDIX ) and one Expansion slot. The LED Indicators are
also located on the front panel of the Switch.