5
Mic Muffs
The headset microphone is covered with a washable, replaceable foam mic muff. This mic
muff helps prevent the “pops” and “hisses” that can occur from speaking into a microphone
that is close to the mouth.
To clean or replace the mic muff:
1. Remove the o-ring.
2. Slip the mic muff off the microphone.
3. At this time, you can decide whether
to clean or replace the mic muff.
If you clean the mic muff, use a mild detergent, rinse it out well and let it
dry completely before re-installing it on the microphone.
4. Slide the mic muff on the microphone.
5. Install the o-ring on the mic muff to secure it.
Replacement mic muffs may be ordered from Firecom.
Intercom Communication
The UHW-20 headset has a black momentary PTT button located on the bottom side of the
right ear dome. Press and hold this button to activate the microphone for intercom communi-
cation. Radio transmitting is not possible with the UHW-20 model.
The UHW-10 and the FHW-10 models have a red momentary PTT button located on the
bottom of the right ear dome. The microphone on these two models is always live for internal
intercom communications. However, press and hold the red button to transmit over the vehicle
radio. Release the button to terminate radio transmission.
Pairing Procedure
1. Press and hold the pairing button on the front panel of the base station for approximately
5-7 seconds until the yellow LED(s) on the front panel of the base station start flashing,
indicating that the base station has entered pairing mode. Once the base station is placed
in pairing mode, the user has approximately 15 seconds to place the headset in pairing mode.
2. Press and hold the PTT button, turn on power to the headset. After approximately 5 seconds,
the green and red LEDs on the outside of the left ear dome will start flashing in a relatively
fast alternating pattern. Release the PTT button.
3. Monitor the green and red LEDs on the left ear dome of the headset. After about 5-7
seconds, the alternating flashing pattern ends, the green LED will flash rapidly for two seconds
and then the green and red LEDs resume normal operation (as stated in the section titled
“LED Indicators”) to indicate that the headset is paired and linked to the base station. The
respective LINK LED on the base station will illuminate steadily after flashing rapidly for
two seconds to indicate that a link to the headset has been established.
Mic muff
O-ring
Mic boom
