Figure D-1. Cdi-60 Hssi Data Interface Module - Comtech EF Data CDM-710 Installation And Operation Manual

Appendix C. CDI-60 HSSI
DATA INTERFACE
C.1 Overview
The CDI-60 HSSI Data Interface (Figure D-1) is a plug-in module that installs into
the rear of the CDM-710 or CDM-710L Broadcast Satellite Modem chassis (Figure
D-2). It provides physical and electrical connection between the external
terrestrial device and the internal circuitry of the modulator or demodulator.

Figure D-1. CDI-60 HSSI Data Interface Module

Figure D-2. CDM-710/L Rear Panel Data Interface Slots
By convention, a modem is Data Communications Equipment (DCE) where Tx
data enters the data interface and Rx data exits. The plug-in interface has full
duplex capability. In addition, the module is automatically configured for simplex-
C–1