Gain
Provides control over the level of input signal that can be applied to the
internal signal buses of the main unit. Allows a way to balance the input
levels of various devices so that the main unit controls can be set to
relatively uniform or optimum levels.
Gate - Threshold (Thresh)
Controls the minimum necessary input signal level to turn the module’s
output on and apply signal to the main unit’s buses. Clockwise rotation
increases the necessary signal level required to produce output and mute
lower priority modules.
Gate - Duration (Dur)
Controls the amount of time the output and mute signal of the module
remains applied to the main unit’s buses after the input signal falls below the
required minimum signal level (set by the threshold control).
Limiter (Limit)
Sets the signal level threshold at which the module will begin to limit the
level of its output signal. Clockwise rotation will allow more output
signal before limiting, counterclockwise rotation will allow less. The
limiter monitors the module’s output signal level, so increasing Gain will
affect when limiting takes place.
Power Supply Connections
Interfacing to a loop or ground start trunk requires an external 48V power
supply to be connected to the module. Make connections as marked. The
ground connection is optional, but can be helpful when interfacing to ground
start trunks. Bogen Model PRS48 is recommended.
Priority Level*
This module can respond to 4 different levels of priority. Priority 1is
the highest priority. It mutes modules with lower priorities and is never
muted. Priority 2 can be muted by Priority 1modules and mutes
modules set for 3 or 4. Priority 3 is muted by either Priority 1or 2
modules and mutes Priority 4 modules. Priority 4 modules are muted
by all higher priority modules.
*The number of priority levels available is determined by the amplifier
the modules are used in.
Interface Type
Dry Loop - Use with page ports. Activated by audio activity on
the telephone line.
Loop Start - Use when interfacing to PBX loop start trunks or
dedicated telephones. Requires connection of external power
supply (see Block Diagram for more info).
Ground Start - Use only on PBX ground start trunks. Requires
connection of external power supply and connection to PBX
ground.
Jumper Selections
Bus Assignment
This module can be set to operate so that the input signal can
be sent to the main unit’s A bus, B bus, or both buses.
Telephone System Connections
Connect the telephone system’s Tip line to the “T” terminal and the Ring
line to the “R” terminal. When interfacing to a ground start trunk, also
connect a wire from the PBX’s ground to the module’s “CM”
terminal. In some cases, the power supply’s ground connection alone will
be adequate. For Dry Loop (Page Ports), connect the audio pair to the
module’s “T” & “R” terminals (polarity insensitive). No power supply is
necessary.The module is audio-activated so no contact pair from the page
port is needed.
Module Installation
1. Turn off all power to the unit.
2. Make all necessary jumper selections.
3. Position module in front of desired module bay
opening, making sure that the module is
right-side up.
4. Slide module on to card guide rails. Make sure
that both the top and bottom guides are
engaged.
5. Push the module in to the bay until the faceplate
contacts the unit’s chassis.
6. Use the two screws included to secure the
module to the unit.
WARNING:
Turn off power to unit and make all jumper
selections before installing module in unit.
