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3.18.4.8
User Redundancy and MGP
The RX8000 supports device redundancy. If one unit fails, another can take its role.
This ensures a continuous service on the output of the system. The output of each
unit can be enabled or disabled manually (see User Redundancy Mode) or
automatically by the redundancy engine (MGP).
Multimedia Guarding Protocol (MGP) is an Ericsson specific protocol used between
Ericsson devices ensuring the ability for an automatic redundancy switch. MGP
ensures that only one device provides output at one time (avoiding duplicated
output) and that if one unit fails another takes over its role automatically and starts
providing output. This reduces service lapse to a minimum time.
In order to know each other's status, devices communicate between each other
using Multimedia Status Messages (MSM). These messages are sent over the data
network (not over the control network) in order to reach every devices providing
output to the same network. MSMs are multicast messages for the same reason and
are sent every n
3.19
Service Filtering and Service Splitting
The RX8000 is capable of a number of Service Filter modes that are available
through of purchase of licensed software options. The IP Output option card is
required also.
The incoming transport stream going in to the RX8000 is typically used to decode a
single service which is then output as analogue or digital video. The recovered
transport stream can also be manipulated and go through a number of stages of as
it is routed to the transport stream output.
Figure 3.168 illustrates how the recovered transport stream inside the RX8000 is
routed.
EN/LZT 790 0005 R7A
th
second which can be set by Tx Interval option setting.
Using the Equipment
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