User's Manual

10
Switch the radio or communication device ON and adjust at the radio or communication device the
desired volume of reception for the ear microphone.
CAUTION!
Before each start of operation control the volume of reception and adjust it, if necessary. Very
loud signals could damage your hearing.
Observe the manufacturer’s operating instruction for the radio and/or communication device.
e. Transmitting and receiving: For transmitting (speaking) press the wire-bound PTT transmit button or
the optional CT-Wireless-PTT and keep it depressed. For safety reasons, keying of the CT-Wireless-
PTT is limited to 30 seconds. The radio unit or communication device is switched to transmission.
You can speak as long as you keep the transmit button depressed. Let the transmit button go in
order to switch the radio unit or communication device back to standby/receiving (hearing).
CT-ClipCom Digital ear microphone
Radio messages and ringing tone of a cellular phone are heard on both sides. In case a PTT
transmit button is actuated or a communication is via a cellular phone, the ear microphone in the
right ear switches from earphone to microphone operation. Consequently, the ambient sound
reception (ASR) of this CT-ClipCom Digital is not active. The DNR electronics (Digital Noise
Reduction) filter and eliminate optional ambient noise from the voice signal.
CT-ClipCom Digital gooseneck microphone
During activation of the PTT transmit button, ambient sound reception is active on both sides. The
noise cancelling gooseneck microphone works without DNR function.
4. Safekeeping – storage
After use, keep the cleaned devices in a clean and dry place at normal room temperature and at normal
relative air humidity.
5. Maintenance
5.1 Visual inspections
Check the CT-ClipCom Digital and particularly the cables and connectors periodically for signs of
fractures, cracks and wear. Check ear moulds and earphones/ear microphones after every use for
pollution. Pollution can be the cause for skin irritation and malfunction.
5.2 Cleaning
ATENTION!
When cleaning, make sure that no moisture penetrates inside the device. Do not use any
solvents (e.g. benzine, alcohol, sterilizing agents, etc.). After cleaning, keep earphones/ear
microphones unpacked until completely dry.
Obstructed sound channels of ear moulds and ear plugs cause poor communication in transmitting
(speaking) and reception (hearing). For periodical cleaning of components we recommend special
cleaning tissues (see chapter 6).
Clean the contacts of connectors with a commonly available contact cleaning agent.