Comtech EF Data CDM-625A User Manual
Page 30
CDM-625A Advanced Satellite Modem
MN-CDM625A
Table of Contents
Revision 3
xxii
N.3
Data Rate vs. Composite Rate............................................................................................. N–2
APPENDIX P.
OPEN NETWORK OPERATIONS ............................................................... P–1
P.1
Overview ............................................................................................................................ P–1
P.2
IBS ...................................................................................................................................... P–1
P.2.1
IBS Clock/Data Recovery and De-jitter ................................................................................................... P–2
P.2.2
IBS Framing ................................................................................................................................................ P–2
P.2.3
IBS Engineering Service Channel ............................................................................................................. P–2
P.2.4
IBS Scrambling ........................................................................................................................................... P–2
P.3
Drop and Insert (D&I) .......................................................................................................... P–3
P.3.1
D&I Primary Data Interfaces .................................................................................................................... P–4
P.3.2
D&I Framing ............................................................................................................................................... P–4
P.4
IDR ..................................................................................................................................... P–5
P.4.1
IDR Primary Data Interfaces ..................................................................................................................... P–6
P.4.2
IDR Engineering Service Channel ............................................................................................................ P–6
APPENDIX Q.
OFFSET QPSK OPERATION ..................................................................... Q–1
APPENDIX R.
QUALITY OF SERVICE (QOS) ................................................................... R–1
R.1
Overview ............................................................................................................................ R–1
R.1.1
QoS Terminology....................................................................................................................................... R–1
R.2
Layer 2 QoS......................................................................................................................... R–2
R.2.1
Modem Tx Data Rate vs. QoS Tx Data Rate ........................................................................................... R–2
R.2.2
Flow Control .............................................................................................................................................. R–3
R.2.3
Port-based Layer 2 QoS ............................................................................................................................ R–3
R.2.4
VLAN-based Layer 2 QoS .......................................................................................................................... R–5
R.3
Layer 3 QoS......................................................................................................................... R–8
R.3.1
Layer 3 QoS Max-Pri Mode ...................................................................................................................... R–8
R.3.2
Layer 3 QoS Min-Max Mode ................................................................................................................. R–10
R.3.3
Layer 3 QoS DiffServ Mode ................................................................................................................... R–12
R.3.3.1 Layer 3 QoS Congestion Avoidance................................................................................................. R–12
R.3.3.2 Layer 3 QoS List of Supported RFCs (Requests for Comment) ..................................................... R–13
R.4
QoS with ACM (Adaptive Coding and Modulation) ............................................................. R–14
R.4.1
Maximum Clipping ................................................................................................................................. R–14
R.4.2
Minimum Data Rate .............................................................................................................................. R–14
APPENDIX S.
TRANSMIT SPECTRUM FILTERING OPTIONS ......................................... S–1
S.1
Overview ............................................................................................................................ S–1