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3.7
Ethernet Data Interface – (J10)
With its multi-port interface, automatic Learning and Aging, Auto-Crossover, Auto-Polarity, Auto-
Negotiation and embedded Quality of Service, the Enhanced Ethernet Interface offers true Plug-
n-Play connectivity.
If the Ethernet Data Interface is selected, then the Tx Clock Source defaults to Serial Clock
Transmit External (SCTE), and the Clock Polarity defaults to Normal.
The Ethernet Bridge Interface makes it easy to connect Local Area Networks (LANs) via satellite.
Select Ethernet as the terrestrial interface, and connect the LAN into any of the two RJ-45
connectors on the unit.
The DMD1050TS Ethernet Interface maintains backward compatibility with all of these products:
•
DMD20/DMD20 LBST/DMD50/DMD2050/DMD2050E and the OM20 with High-level Data
Link Control (HDLC) selection RADYNE
•
SLM-5650A using a Gigabit Bridge card with HDLC Comtech
•
CDM-570/CDM-625 with the HDLC selection Managed 570
It allows for all higher level protocols, like DHCP, UDP, TCP, HTTP and FTP, etc., to pass
transparently through the level 2 Bridge interface, and operates with its line speed learning
capability. Ethernet packet traffic is forwarded immediately to the applicable ports without
unnecessary startup delay.
For users who want more control over traffic, the 10/100 Ethernet interface provides additional
QOS controls, and new features, such as port based priorities, strict priority queuing and the
ability to operate in a FIFO-like mode.
The full duplex capability of the standard 10/100 interface allows it to pass up to 20 Mbps in each
direction over the satellite.
The DMD1050TS supports Radyne HDLC, Comtech HDLC and 570 Managed Swich modes,
offering compatibility with all the configurations of Comtech products shown in Table 3-1.
Theory of Operation
DMD1050TS Satellite Modem Board
3–12
Revision 1
MN-DMD1050TS
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