Comtech EF Data CDM-710L Especificações descarregar pdf (Página 141)

Chapter 11. CDI-70 1000 Base-T

(GbE) INTERFACE

11.1 Introduction

The CDI-70 Gigabit Base-T Ethernet Interface or GbE performs a Motion Picture Expert Group

(MPEG-2) packet decapsulation operation on ingress Internet Protocol (IP) packets received from

the Local Area Network (LAN). MPEG-2 packets are extracted from the active (of up to two

multicast) connection and forwards the extracted MPEG-2 packets to Wide Area Network

(WAN) (satellite connection). In addition, an MPEG-over-IP transmit function is performed, in

which MPEG-2 packets are received from the WAN and are encapsulated in IP packets and

transmitted to the LAN (egress).

The GbE Interface is shown in Figure 11-1. Monitor and Control (M&C) information is not

supported on the GbE Interface but available through the 10/100 Base-T remote port of the

modem. The GbE Interface supports data rates from 1.5Mbps to either 80.376 Mbps with SMPTE

2022 (formerly Pro-MPEG COP3) FEC enabled or 124 Mbps with SMPT 2022 / Pro-MPEG

COP3 FEC disabled. The user interface to the GbE card is a single IEEE 802.3ab 1000 Base-T

copper compliant female RJ-45 connector wired as described in Table 11-1

Figure 11-1. 1000 Base-T Ethernet (GbE) Interface

11–1

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