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Bosch Security Systems | 2011-02
Praesideo 3.5 | Installation and User Instructions | 9 | System Configuration en | 379
4 Double click the selected main amplifier or click the
> button to assign the main amplifier to the spare
amplifier. A screen similar to the one in figure 45.14
appears in the main frame of the web interface.
5 Submit the changes. Note that the changes are not
permanent until the configuration is saved (see
section 40.4.4 and section 40.4.5).
45.5 BGM Channels
45.5.1 Introduction
At the BGM channels page, background music (BGM)
channels can be built. A BGM channel refers to an
audio input in the system. Optionally, default zones and
or default zone groups can be connected to the channel.
When the system is switched on, then the specified
BGM is routed to the connected zones and zone groups.
You can specify a routing limit to a BGM channel. If the
the Limit routing checkbox is unticked, all available
zones or zone groups can be made part of the default
routing for the BGM channel. With Limit routing
enabled, you can make a sub-set of available zones and
zone groups and the BGM channel can not be routed
outside this subset. This function can be used for routing
of e.g. a licensed BGM channel to specific subscribers.
In this case the default zones for this BGM channel at
power on is again a sub-set of the specified routing limit.
Also, zones and zone groups that are not part of the
routing limit can not be added to the BGM channel
selection via call station keys.
The maximum number of BGM channels is 28, but if a
BGM channel uses an audio input on a certain unit, and
all the zones within the routing limit are part of that
particular unit only, none of the 28 system bus channels
will be used for this BGM channel (with the following
small exception for the LBB4428/00: audio outputs 1 to
4 and audio inputs 1 and 2 are considered a unit, just as
audio outputs 5 to 8 and audio inputs 3 and 4 comprise
another unit. In this case, cross-feeding the BGM
channels will occupy a bus channel).
This allows for many local audio channels that will not
be routed over the Praesideo network.
45.5.2 Overview
The BGM channels page (see figure 45.15) contains the
following:
• Name - Name of the background music channel.
• Ty pe - Select between zones and zone groups as
available destinations.
• Available destinations - The left column lists the
available zones and zone groups.
• Limit routing - Tick the checkbox to apply a
routing limit to the selected BGM channel or get
access to all destinations.
• Allowed destinations - The center column lists
the zones and zone groups that are allowed to
receive the BGM channel. This list is not visible if
the Limit routing checkbox is unticked.
• Add/Remove buttons - Using the > and <
buttons, selected outputs can be added to or
removed from Allowed destinations and Assigned
destinations.
• Assigned destinations - The right column lists
the zones and zone groups that are assigned to the
selected BGM channel at system startup.
figure 45.14: Sparing, step 4
Note
When a zone or zone group is already
connected to a BGM channel, do not connect
another BGM channel to it. Connecting zones
and zone groups to multiple BGM channels can
cause inconsistencies in the configuration
database when the system is switched on. In
turn, these inconsistencies can result in
unpredictable system behavior. The routing of
BGM channels can be changed with call station
keypads after the system has started up (see
chapter 47).
Note
Each BGM channel must have a unique audio
input.