D-Link DES-1048G Manual - Switch Description
D-Link DES-1048G Unmanaged Layer 2 Ethernet Switch
network to be divided into different segments which don’t compete with each other for network transmission
capacity, giving a decreased load on each.
The switch acts as a high-speed selective bridge between the individual segments. Traffic that needs to go from
one segment to another (from one port to another) is automatically forwarded by the switch, without interfering
with any other segments (ports). This allows the total network capacity to be multiplied, while still maintaining
the same network cabling and adapter cards.
For Fast Ethernet or Gigabit Ethernet networks, a switch is an effective way of eliminating problems of chaining
hubs beyond the “two-repeater limit.” A switch can be used to split parts of the network into different collision
domains, for example, making it possible to expand your Fast Ethernet network beyond the 205-meter network
diameter limit for 100BASE-TX networks. Switches supporting both traditional 10Mbps Ethernet and 100Mbps
Fast Ethernet are also ideal for bridging between existing 10Mbps networks and new 100Mbps networks.
Switching LAN technology is a marked improvement over the previous generation of network bridges, which
were characterized by higher latencies. Routers have also been used to segment local area networks, but the cost
of a router and the setup and maintenance required make routers relatively impractical. Today’s switches are an
ideal solution to most kinds of local area network congestion problems.
Switch Description
The DES-1048G is a stand-alone unmanaged switch. It is equipped with forty-eight ports providing dedicated 10
or 100 Mbps bandwidth. These ports can be used for connecting PCs, servers, and hubs. The forty-eight dual
speed ports use standard twisted-pair cabling and are ideal for segmenting networks into small, connected
subnets. Each port can support up to 200 Mbps of throughput in full duplex mode. In addition, the Switch is
equipped with two Mini-GBIC fiber optic uplink ports enabling convenient access to a server or network
backbone for all the clients served by the Switch. This stand-alone Switch enables the network to use some of the
most demanding multimedia and imaging applications concurrently with other user applications without creating
bottlenecks. The built-in console interface can be used to individually configure each port for Speed, Full or Half
duplex operation, and IEEE 802.3x Flow Control in full duplex mode.
Features
• Forty-eight 10/100 Mbps ports for connections to other LAN switches and hubs, or directly to power
users
• IEEE 802.3 compliant 10BASE-T
• IEEE 802.3u compliant 100BASE-TX
• IEEE 802.3z compliant (for mini-GBIC port insert)
• Full and half-duplex for both 10Mbps and 100Mbps connections. Full duplex allows the switch port to
simultaneously transmit and receive data, and only works with connections to full-duplex capable end
stations and switches. Connections to a hub must take place at half-duplex
• 2 optional Mini-GBIC ports located on the front panel. The Mini-GBIC ports operate at full duplex only
• Store and forward switching scheme capability to support rate adaptation and protocol conversion
• Data forwarding rate 14,880 pps per port at 100% of wire-speed for 10Mbps speed
• Data forwarding rate 148,809 pps per port at 100% of wire-speed for 100Mbps speed
• Data forwarding rate 1,488,090 pps per port at 100% of wire-speed for 1000Mbps speed
• Data filtering rate eliminates all error packets, runts, etc. at 14,880 pps per port at 100% of wire-speed
for 10Mbps speed
• Data filtering rate eliminates all error packets, runts, etc. at 148,810 pps per port at 100% of wire-speed
for 100Mbps speed
• Data filtering rate eliminates all error packets, runts, etc. at 1,488,100 pps per port at 100% of wire-
speed for 1000Mbps speed
• Layer 2 switching based on MAC address
• Address handling: auto-learning, auto-aging
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