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Chapter 14. 10/100/1000 Base-T
GIGABIT ETHERNET (GigE)
INTERFACE (CDI-70)
14.1 Introduction
The CDI-70 10/100/1000 Base-T Gigabit Ethernet (GigE) Interface (Figure 14-1) – referred to
hereafter as the CDI-70 or the GigE Interface – is a plug-in module that is installed into the rear
of the CDM-710G High-Speed Satellite Modem chassis. It serves as an Ethernet bridge for data
traffic. Monitor and Control (M&C) information is not supported on the GigE Interface but is
available through the 10/100 Base-T remote port of the modem.
Figure 14-1. CDI-70 10/100/1000 Base-T Gigabit Ethernet (GigE) Interface Module
The GigE Interface provides 10/100/1000 Base-T connectivity and supports data rates from 1
Mbps to 155 Mbps. IP traffic entering the interface is encapsulated in HDLC protocol for
transmission over the satellite link. In normal mode, the packets are passed unaltered. For VLAN
mode, native VLAN processing and/or VLAN tagging is supported. HDLC CRS-16 verification
is performed on all received (from WAN) HDLC frames.
Slot 1 of the CDM-710G – located at the center right of the chassis rear panel – is typically filled
with a blank panel or a data interface module first; however, due to backplane limitations, Slot 2 –
located at the right side end of the chassis rear panel – serves as the dedicated slot for the CDI-70
10/100/1000 Base-T Gigabit Ethernet interface.
For a table of the applicable interfaces and installable combinations, refer to Sect. 1.3.5
Allowable Data Interface Combinations.
14–1
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