Comtech EF Data MIDAS 4 System and Design - Manual (Page 9)

System and Design Manual, Revision 2
Preface vii
Table of Contents
1. INTRODUCTION ............................................................................................... 1–1
Introduction .............................................................................................................................................................1–1
Overview...................................................................................................................................................................1–1
Multimedia Integrated Digital Access System ......................................................................................................1–3
System Architecture ..................................................................................................................................................1–4
MIDAS Controller.....................................................................................................................................................1–4
SNM-1001 Network Control Modem........................................................................................................................1–6
SNM-1002 LinkSync Modem ...................................................................................................................................1–6
Traffic Node ..............................................................................................................................................................1–6
Single-Channel Traffic Node.....................................................................................................................................1–7
Multi-Channel Traffic Node ......................................................................................................................................1–8
Control Channels .......................................................................................................................................................1–9
Network Topology.....................................................................................................................................................1–9
MIDAS Summary ..................................................................................................................................................1–10
2. SOLUTIONS......................................................................................................... 2–1
Enterprise Networking............................................................................................................................................2–1
Permanent Connectivity ............................................................................................................................................2–2
Connectivity on Demand ...........................................................................................................................................2–3
Manual Request .........................................................................................................................................................2–3
Customer Equipment Interface .................................................................................................................................2–3
MIDAS Operator Workstation ..................................................................................................................................2–4
RTS/DTR Triggered ..................................................................................................................................................2–4
User Port Triggered ...................................................................................................................................................2–5
IP Route .....................................................................................................................................................................2–5
Grades of Service .....................................................................................................................................................2–6
Congestion Reduction/Overflow.............................................................................................................................2–6
Automatic Circuit Restoral (Disaster Recovery) ..................................................................................................2–8
Semi-Automatic Circuit Restoral ............................................................................................................................2–10
Group Videoconferencing .....................................................................................................................................2–11
Site Configuration....................................................................................................................................................2–11
Video Conference Session.......................................................................................................................................2–13
Chairperson..............................................................................................................................................................2–14
Participant Capability ..............................................................................................................................................2–14
Videoconference Session.........................................................................................................................................2–14
Initiation ..................................................................................................................................................................2–15
Change Broadcaster/Return Channel.......................................................................................................................2–15
Termination .............................................................................................................................................................2–16