Comtech EF Data CDM-750 - Manual (Page 12)

CDM-750 Advanced High-Speed Trunking Modem Revision 2
Table of Contents MN-CDM750
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B.2 Optional PIIC Modules .......................................................................................................... B–4
B.2.1 G.703 E3/T3/STS‐1 PIIC Module (CEFD P/N PL‐0000795) ................................................................. B–4
B.2.1.1 G.703 E3/T3/STS‐1 PIIC Module Summary of Specifications ............................................ B–5
B.2.1.1.1 General Specifications ................................................................................................ B–5
B.2.1.1.2 Interface Specifications .............................................................................................. B–5
B.2.2 STM‐1 Copper PIIC Module Kit (CEFD P/N KT‐0000255) ................................................................... B–6
B.2.2.1 STM‐1 Copper PIIC Module Summary of Specifications ................................................... B–7
B.2.3 OC‐3 Single/Multi Mode PIIC Module Kits (CEFD P/N KT‐000025X) ................................................. B–8
B.2.3.1 OC‐3 Single/Multi Mode PIIC Module Summary of Specifications ................................... B–9
APPENDIX C. ADAPTIVE CODING AND MODULATION (ACM) OPTION ........................ C–1
C.1 Introduction ......................................................................................................................... C–1
C.2 Background .......................................................................................................................... C–2
C.2.1 ACM Operational Link Example ........................................................................................................... C–4
C.3 ACM System Description ....................................................................................................... C–6
C.4 CDM‐750 ACM Scheme ......................................................................................................... C–8
C.4.1 Target Es/No Margin ............................................................................................................................. C–8
C.4.2 Distortion Adaptation / Modulation Type Impairment ..................................................................... C–9
C.4.3 Pilots ..................................................................................................................................................... C–10
C.4.4 Long and Short Frames ....................................................................................................................... C–10
C.4.5 Monotonic Operation ......................................................................................................................... C–10
C.4.6 ModCod Selection ............................................................................................................................... C–12
C.5 Configuring ACM in the CDM‐750 ....................................................................................... C–14
C.5.1 ACM Configuration via the Front Panel ............................................................................................. C–16
C.5.2 ACM Configuration via the CDM‐750 Web Server Interface ........................................................... C–17
C.6 Monitoring ACM Performance and Statistics....................................................................... C–18
C.6.1 ACM Congestion Control .................................................................................................................... C–19
C.6.2 Notes and Recommendations ........................................................................................................... C–20
C.6.3 ACM – Summary of Specifications ..................................................................................................... C–21
APPENDIX D. DOUBLETALK CARRIER-IN-CARRIER (CNC) OPTION ............................ D–1
D.1 Introduction ......................................................................................................................... D–1
D.1.1 What is DoubleTalk Carrier‐in‐Carrier? ............................................................................................... D–1
D.2 Application Requirements .................................................................................................... D–2
D.3 Operational Details ............................................................................................................... D–4
D.4 System Functionality and Operational Considerations .......................................................... D–5
D.4.1 DoubleTalk Carrier‐in‐Carrier Cancellation Process ........................................................................... D–8