Comtech EF Data CDM-625A Installation And Operation Manual page 19

CDM-625A Advanced Satellite Modem
Table of Contents
D.4.2.1 Creating the Message via the CDM-625A Front Panel and VFD .................................................... D-5
D.4.2.2 Creating the Message via the CDM-625A Web Server (HTTP) Interface ...................................... D-6
APPENDIX E. CLOCK MODES AND DROP AND INSERT (D&I) ...................................... E-1
E.1 Introduction ....................................................................................................................... E-1
E.2 Transmit Clocking ............................................................................................................... E-1
E.2.1 Internal Clock ............................................................................................................................................. E-1
E.2.2 TX Terrestrial.............................................................................................................................................. E-2
E.2.3 RX Loop-Timed, RX=TX ............................................................................................................................. E-2
E.2.4 RX Loop-Timed, RX<>TX (Asymmetric Loop Timing) ............................................................................ E-2
E.2.5 External TT with ST = RX Satellite ............................................................................................................ E-2
E.3 Receive Clocking ................................................................................................................. E-4
E.3.1 Buffer Disabled (RX Satellite) ................................................................................................................... E-4
E.3.2 Buffer Enabled, TX=RX (TX Terrestrial or Int (SCT) Clock) ..................................................................... E-4
E.3.3 Buffer Enabled, RX<>TX (TX Terrestrial or Int (SCT) Clock) ................................................................... E-4
E.4 X.21 Notes .......................................................................................................................... E-6
E.5 Drop and Insert ................................................................................................................... E-6
E.6 Frame Formats .................................................................................................................... E-7
E.7 Timeslot Selection ............................................................................................................... E-8
E.8 Drop and Insert (D&I) Clocking ............................................................................................ E-9
E.9 RX Buffer Clock = Insert (D&I only) .................................................................................... E-10
E.10 Single-Source Multiple Modems ........................................................................................ E-10
E.11 G.703 Clock Extension ....................................................................................................... E-11
E.11.1 Clock Extension Mode 1 ......................................................................................................................... E-11
E.11.2 Clock Extension Mode 2 ......................................................................................................................... E-12
E.11.3 Clock Extension Mode 3 ......................................................................................................................... E-12
E.12 Quad E1 Operation ........................................................................................................... E-16
APPENDIX F. DOUBLETALK CARRIER-IN-CARRIER OPTION ....................................... F-1
F.1 Introduction ....................................................................................................................... F-1
F.2 What is DoubleTalk Carrier-in-Carrier? ................................................................................ F-1
F.3 Application Requirements ................................................................................................... F-2
F.3.1 Operational Recommendations .............................................................................................................. F-4
xvii
Revision 0
MN-CDM625A