Table of Contents
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CDM-625 Advanced Satellite Modem
Table of Contents
16.6
Ethernet Redundancy ...................................................................................................... 16-14
16.7
Advanced Network Timing .............................................................................................. 16-15
16.7.1
Overview ............................................................................................................................................... 16-15
16.7.2
SNTP (Simple Network Time Protocol) .............................................................................................. 16-15
16.7.3
PTP (Precision Time Protocol)............................................................................................................. 16-15
CHAPTER 17. ADAPTIVE CODING AND MODULATION (ACM) ..................................... 17-1
17.1
Introduction ..................................................................................................................... 17-1
17.2
Background ...................................................................................................................... 17-2
17.3
Requirements for ACM ...................................................................................................... 17-3
17.4
An Existing Satellite ACM Scheme ...................................................................................... 17-5
17.5
Disadvantages of DVB-S2 .................................................................................................. 17-5
17.6
VersaFEC ACM .................................................................................................................. 17-6
17.7
VersaFEC ACM Latency ...................................................................................................... 17-8
17.8
Configuring VersaFEC ACM in the CDM-625 ....................................................................... 17-9
17.9
Monitoring ACM performance ......................................................................................... 17-11
17.10
ACM Congestion Control ............................................................................................. 17-12
17.11
Notes and Recommendations ...................................................................................... 17-13
17.12
VersaFEC ACM - Summary of Specifications ................................................................. 17-15
CHAPTER 18. IP PACKET PROCESSOR OPTION .......................................................... 18-1
18.1
Introduction ..................................................................................................................... 18-1
18.1.1
IP Packet Processor - Operational Requirements .............................................................................. 18-1
18.1.2
Interoperability Compatibility/Limitations........................................................................................... 18-2
18.2
IP Packet Processor Features ............................................................................................. 18-3
18.2.1
Streamline Encapsulation (SLE) ............................................................................................................. 18-3
18.2.2
Modes of Operation ............................................................................................................................... 18-3
18.2.3
Subsystem Multiplex (Sub-Mux) ........................................................................................................... 18-3
18.2.4
Adaptive Coding and Modulation (ACM) ............................................................................................. 18-3
18.2.5
FAST Options ........................................................................................................................................... 18-4
18.2.5.1 Header Compression ......................................................................................................................... 18-4
18.2.5.2 Payload Compression ........................................................................................................................ 18-5
18.2.5.3 Advanced Quality of Service (QoS) ................................................................................................... 18-5
18.2.5.4 Advanced Encryption Standard (AES) Encryption .......................................................................... 18-5
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Revision 13
MN-CDM625
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