CDM-625A Advanced Satellite Modem MN-CDM625A
Appendix L Revision 4
L–2
L.1.2 CDM-625A CDM-625A Interoperability Compatibility/Limitations
A CDM-625A Advanced Satellite Modem that is equipped with the IP Packet
Processor is not interoperable for IP/Ethernet Traffic with a CDM-625A that is not
L.2 IP Packet Processor Features
equipped with the IP Packet Processor.
L.2.1 Streamline Encapsulation (SLE)
SLE can reduce the encapsulation overhead by as much as 65% compared to industry-standard
HDLC.
L.2.2 Modes of Operation
Appendix K. ETHERNET NETWORK CONFIGURATION
A CDM-625A equipped with the IP Packet Processor can operate in four modes to support Point-
to-Point and Point-to-Multipoint network topologies:
•
•
•
•
L.2.3 Adaptive Coding and Modulation (ACM)
Appendix M. ADAPTIVE CODING
AND MODULATION (ACM)
Comtech EF Data’s VersaFEC® Adaptive Coding and Modulation (ACM) feature, a patents-
pending technology wholly owned and developed by Comtech EF Data and CEFD sister division
Comtech AHA Enterprise Products Group, can be used with the IP Packet Processor to maximize
throughput.
ACM converts available link margin into additional throughput, thereby maximizing throughput
under all conditions, including rain fade, inclined orbit satellite operation, antenna mispointing,
interference and other impairments.
L.2.4 Subsystem Multiplex (Sub-Mux)
Appendix N. IP SUB-MUX
Sub-Mux is a secondary framing structure that combines IP traffic with any currently available
combination of framing and interface type (excluding IP itself). A specific, user-selected ratio
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