2.12
MD8000 Multimedia Transport System
MD8000 Rev. H
Class C
The
Class C
mode runs under the “
Dual SWCNT/Single Trunk
” configuration. This
configuration protects the system from a single SWCNT board failure. Figure 2-6 illustrates
the flow of packets.
Figure 2-6: Class C Mode Of Operation
In the originating System (#1), the Channel Service board duplicates the encapsulated video
signal with the same MAC address “M1-1” and delivers the same to #1 (CPU-ACT) and #2
(CPU-STB) SWCNT boards. (See
Dual SWCNT Operation, page 2.33
operation.) SWCNT #1 passes packets to the “Line 1” input of the Trunk board and SWCNT
#2 passes packets to the “Line 2” input of the same Trunk board. The Trunk board transmits
out to the network packets arrived through the “ACT” SWCNT board and discards all the
packets from the “STB” SWCNT board. The Trunk board continuously monitors the “ACT”
input-packet flow and if it drops off for a certain period of time, the board automatically
switches to use the packets from the “STB” stream.
In the receiving System (#2), a Trunk board duplicates the received packets and delivers the
same to both #1 (ACT) and #2 (STB) SWCNT boards. The #1 SWCNT board passes the
received packets to the “Line 1” input of the destination Channel Service board and the
#2 SWCNT board passes the received packets to the “Line 2” input of the same destination
Channel Service board. The output video signal is reproduced from either the “Line 1” or
“Line 2” stream.
Summary of Contents for MD8000 Series
Page 1: ...MD8000 Multimedia Transport System Operational Manual For Release 8 21 MD8000 Rev H ...
Page 2: ......
Page 3: ...MD8000 Multimedia Transport System Operational Manual For Release 8 21 MD8000 Rev H ...
Page 6: ......
Page 12: ...vi MD8000 Transport System MD8000 Rev H This Page Intentionally Left Blank ...
Page 20: ...1 8 MD8000 Multimedia Transport System MD8000 Rev H This Page Intentionally Left Blank ...
Page 56: ...2 36 MD8000 Multimedia Transport System MD8000 Rev H Figure 2 32 SWCNT 2 State Transition ...
Page 60: ...3 2 MD8000 Multimedia Transport System MD8000 Rev H This Page Intentionally Left Blank ...
Page 66: ...3 1 6 MD8000 Multimedia Transport System MD8000 Rev H This Page Intentionally Left Blank ...
Page 70: ...3 2 4 MD8000 Multimedia Transport System MD8000 Rev H This Page Intentionally Left Blank ...
Page 78: ...3 3 8 MD8000 Multimedia Transport System MD8000 Rev H This Page Intentionally Left Blank ...
Page 84: ...3 5 4 MD8000 Multimedia Transport System MD8000 Rev H This Page Intentionally Left Blank ...