12 Installation
C-2000 and C-2000HS Technical Manual
Bosch Security Systems, Inc.
Technical Manual
F.01U.174.927 Rev 03
Feature Description
Crossmute
When a parallel console operator keys a microphone in the same room, the
Crossmute
function mutes the receive audio path
of the other parallel consoles. This prevents any unwanted audio loops that could occur, causing a loud squeal on the parallel
speakers.
Feedback may be avoided by muting the receive audio of the other consoles which are in parallel with a transmitting console.
This can be accomplished by connecting pins 1 and 8 of each of the consoles to be crossmuted. as shown in Figure 5. Pin 8
must be connected to provide a common ground.
Figure 5
illustrates the connections between consoles 1 through 3 that are in
the same room and when one (1) transmits, the receive audio on the other consoles is muted. Console 4 is off-site with no
possibility of feedback, therefore, it is not connected and is not muted.
NOTE:
The intercom function does not work between crossmuted consoles.
Supervisor Function
The
Supervisor
function enables a console, such as the C-1616 which has the capability to drive this line, to disable all units
on a particular line. This includes both PTT and RX audio. Its connection is similar to the crossmute function. By wiring
alone, it is possible to set up only specific consoles with this feature. The connection scheme required to utilize this function is
shown in Figure 6. Pin 2 of all consoles are connected together. Pin 8 is a common ground for all consoles and is connected
together on all consoles.
Assuming console 1 has supervisory capability, when activated, Line 1 on parallel consoles 2 and 3 would then be inhibited
from both transmit and receive. In addition, the C-2000 displays
SU
on the seven (7) segment display if a master console, such
as the C-1616, activates the supervisor function.
FIGURE 5.
Crossmute Function Example
FIGURE 6.
Supervisor Function Example
