Comtech EF Data CDM-750 - Manual (Page 227)

B–1
Appendix B. PIIC (PLUG-IN
INTERFACE CARD) MODULES
B.1 Introduction
The CDM‐750 Advanced High‐Speed Satellite Modem rear panel features two slots that
accommodate optional PIIC (Plug‐in Interface Card) data modules. These modules plug into
either or both of the Interface Option slots located on the rear panel of the CDM‐750 chassis
(Figure B‐1).
By convention, a modem is Data Communications Equipment (DCE) where Tx data enters the
data interface and Rx data exits. Via the chassis’ PIIC module connections, the CDM‐750
provides physical and electrical connection between the external terrestrial device and the
internal circuitry of the modulator or demodulator.
While the CDM‐750’s available optional PIIC modules are usually ordered with the modem, they
are easily field‐installed. The available PIIC modules, and reference to their pertinent section in
this appendix, are as follows:
CEFD Kit / Assembly Description
For Details See
Appendix B Sect.
PL-0000795 G.703 ‘BNC’ E3/T3/STS-1 PIIC Module B.2.1
KT-0000255 SFP STM-1 Copper ‘BNC’ PIIC Module B.2.2
KT-0000256 SFP OC-3 Single Mode PIIC Module
B.2.3
KT-0000257 SFP OC-3 Multi Mode PIIC Module
Additional PIIC module data options (ASI, HSSI, etc.) will become available upon
request.
Any PIIC module supported by the CDM‐750 can be used in any slot. In Single Stream Mode, a
single PIIC module is active and no other interfaces are active. In MultiStream Mode, one or
both PIIC modules are active AND at least one Gigibit Ethernet interfiace is active. The CDM‐750
acts as a multiplexor/demultiplexor in MultiStream Mode.