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F.1
Introduction
Just like the original Ethernet Bridge, the new Enhanced Ethernet Interface (EEI) makes
connecting LANs via satellite easy to do. Simply select Ethernet as the terrestrial interface and
connect the LAN into any of the four RJ-45 connectors on the back panel. With its multi-port
interface, automatic Learning and Aging, Auto-Crossover, Auto-Polarity, Auto-Negotiation and
embedded Quality of Service, the EEI offers true Plug-n-Play connectivity.
The EEI is backward-compatible with the original, and is configured easily for the same bridge-
like operation. It allows all higher level protocols like DHCP, UDP, TCP, HTTP and FTP, etc., to
pass transparently. Its line speed learning capability causes traffic to be forwarded immediately to
the correct ports without unnecessary startup delay.
For more control over traffic, the EEI provides additional QoS controls and new features, such as
port based priorities, strict priority queuing and operation in a FIFO-like mode.
The full duplex capability of the standard 10/100 EEI allows it to pass up to 20 Mbps for
DMD1050TS, and when installed in a DMD50 or DMD2050, 52 Mbps in each direction over the
satellite.
The DMD1050TS supports Radyne HDLC, Comtech HDLC and Managed 570 HDLC modes,
offering compatibility with all other Comtech EF Data HDLC modes of operation.
F.2
Point-to-Point Applications
Figure F-1 shows a typical application, connecting a remote office to the corporate headquarters
via satellite. Because the EEI places no restrictions on the IP addresses or subnet masks chosen
for a particular implementation, there is no lengthy setup required and no need to change any
existing network configurations. Simply connect the WAN port of each router to the Modem and
the satellite network is up and running.
Appendix F
Appendix F. Ethernet Data
Figure F-1. Point-to-Point Applications
DMD1050TS Satellite Modem Board
F–1
Revision 1
Interface
MN-DMD1050TS
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