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Introduction
Congratulations on your purchase of Edimax’s 8-port dual-speed hubs. Migrating
from traditional 10Mbps Ethernet to 100Mbps Fast Ethernet is now simple and
affordable with Edimax’s dual-speed hubs. Edimax’s high performance 8-port
desktop 10/100Mbps dual-speed hubs (ED-1508/ED-1508X/ED-1508S/ED-1508SX)
are equipped with 8 RJ45 dual-speed ports and one selectable uplink port using slide
switch.
Typically a dual-speed hub has two independent internal network segments: 10Mbps
segment and 100Mbps segment. Depending on the speed of attached network
devices, each individual port of a dual-speed hub provides Auto-Negotiation
capability which automatically senses and selects optimum speed at 10Mbps or
100Mbps. A 10Mbps network device attached to the dual-speed hub will be able to
communicate with other network devices attached to the hub running at 10Mbps. On
the other hand, a 100Mbps network device attached to the dual-speed hub will be
able to communicate with other devices attached to the hub running at 100Mbps.
Therefore, dual-speed hub can be 10Base-T hub when all the connecting nodes are
running at 10Mbps as illustrated in Figure 1-1, or can be 100Base-TX hub when all
the connecting nodes are running at 100Mbps as illustrated in Figure 1-2. ED-1508
series dual-speed hubs are the ideal hubs for both 10Base-T and 100Base-TX
networks.
* CAUTION: If you connect both 10Mbps network devices and 100Mbps network
devices to ED-1508 and ED-1508S dual-speed hubs, the 10Mbps
devices will not communicate with 100Mbps devices.
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Figure 1-1 10Mbps segment connecting
10Mbps devices
Figure 1-2 100Mbps segment connecting
100Mbps devices
100Mbps
10Mbps
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ED-1508
Dual Speed Hub
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Dual Speed Hub
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