9
8
Terminators
Two terminators are provided to complete a network circuit. The terminators are
located at both ends of a network. For optimal performance, install terminators
as close to the unit as possible and no further than 6 feet in wire length away.
Terminators are provided with every unit and available as an accessory (see
“Options and Accessories” section).
NOTE:
Soldering terminators is recommend over butt splicing to assure a good
connection.
GRN
WHT
GRN
WHT
DRAIN (CHASSIS GND)
TERMINATOR
BLU
POWER
YEL (+)
GRY (-)
BRN
DRAIN (CHASSIS GND)
POWER
GRY (-)
YEL (+)
BLU
BRN
BLU
POWER
BRN
TERMINATOR
DRAIN (CHASSIS GND)
GRY (-)
YEL (+)
WHT
GRN
MULTIPLE UNIT WIRING
Multiple Unit Wiring
SYSTEM WIRING
OPERATION
Without headset
Base station audio is sent over the network to other stations when the panel PTT is
depressed and sound is present on the microphone. When multiple stations are on
a network, a “first come, first served” principle is employed between base stations
with panel PTT buttons. Depressing a panel PTT button always disengages the
respective station’s speaker.
Remote stations employ voice activated microphones that transmit audio over the
network when sound is present at the microphone. Audio from other stations will
engage the remote unit speaker and disengage the remote unit microphone when
sent via a panel PTT button.
An automatic gain control is provided for every remote and base unit microphone.
When extremely high noise is present the transmitted audio level from that micro-
phone will be lowered.
With headset
Headset usage provides hands-free full-duplex communications between stations. If
two stations are using headsets, they will be able to talk and hear each other without
depressing PTT buttons. Radio communication is possible with Firecom accessories
(see “Options and Accessories” section in this manual). Use only Firecom 10 series
headsets with red PTT buttons.
If a base station headset user is depressing the panel PTT and speaks into the head-
set microphone, the user’s voice will transmit over remote station speakers. If a
remote station is employing a headset and others are not, simply speaking into the
headset microphone will allow the user to be heard over other station’s speakers.
Radio Communications
Radio broadcast and reception are available with the addition of an analog interface
unit (see “Options and Accessories” section). Once an interface unit is installed on
a network, radio communication is possible at every unit on the network. Incoming
radio traffic will be heard on base station speakers and headsets at remote and
base stations, but not heard on remote station speakers. A Firecom 10 series headset
with red PTT button is required to transmit over the radio.
