Overview
DLE49-MA User’s Guide
1-3
The DLE49-MA can be used to connect individual high-bandwidth user
devices, such as workstations, or to provide a central switching point for
multiple 10 Mbps Ethernet segments. The optional HSIMs provide high
speed uplinks to other networking technologies such as Gigabit Ethernet,
Fast Ethernet, Fiber Distributed Data Interface (FDDI), Wide Area
Network (WAN) and Asynchronous Transfer Mode (ATM).
The following sections describe the features of the DLE49-MA.
1.1.1
Connectivity
The DLE49-MA connects to Ethernet networks or workstations through
the four RJ21 connectors on the front panel. These ports support
Unshielded Twisted Pair (UTP) cables with an impedance between 85
and 111 ohms at lengths up to 100 meters. These ports are IEEE 802.3u
10BASE-TX compliant.
The DLE49-MA has a slot for an optional HSIM to provide additional
connectivity to various networking technologies.
1.1.2
Auto-Negotiation
The front panel ports on the DLE49-MA module have the ability to
auto-negotiate the type of connection required to provide a link to another
device. During Auto-Negotiation, two devices automatically exchange
information “telling” each other what their operating capabilities are. The
Auto-Negotiation feature targets the maximum capabilities that can be
reached between the two devices.
When Auto-Negotiation is supported at both ends of a link, the two
devices dynamically adjust to full or half duplex operation based on the
maximum capability that can be reached between the two devices. If the
device connected to the DLE49-MA cannot auto-negotiate, the
DLE49-MA interface operates according to the capabilities of the other
device.
1.1.3
Runtime IP Address Discovery
This feature enables the module to automatically accept an IP address
from a Boot Strap Protocol (BootP) server on the network into NVRAM
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