Clear-Com ICS-22 - Manual (Page 12)

Vitec Group Communications
ICS-22 Speaker Panel Instruction Manual
1 - 6
Program-Level Control
This control sets the program input audio level heard in the headset or
panel speaker.
Speaker ON/OFF Switch
This switch turns the front-panel speaker on or off. It also controls
whether the tone alert is heard through the speaker. The speaker
volume will automatically dip when the talk function is set, unless the
VOX function is enabled.
Mic-Select Switch
This switch selects whether the panel microphone or the headset
microphone is active. When the VOX feature is enabled, it is only
operational when the panel microphone is active.
Talk/Listen Select Switch
This switch selects the panel/interface label (A or B) for
communication.
Headset Connector
This connector is located on the front panel. All Clear-Com headsets
are recommended for use with the ICS-22. The Clear-Com PT-4
Push-to-Talk Microphone or the HS-6 Telephone Handset will also plug
into the headset connector. The following is a description of the
characteristics of a suitable headset:
• Mic Type—Dynamic; 150 to 400 ohms impedance; -55 dB output
level.
• Headphone—Dynamic; 50 to 2000 ohms impedance.
The wiring of the headset is to be as follows:
Table 1-2: ICS-22 Headset Wiring
The microphone and headphone wiring in the headset cord must be
individually shielded.
Pin Number Description
1 Microphone ground (shield)
2 Microphone hot
3 Headphone ground
4 Headphone hot
• The VOX feature
provides operators
with a voice activated
option.
• Note: Do not connect
Pins 1 and 3
together. Headset
extension cords or
headset “Y” cables
are not
recommended
because they may
increase crosstalk
between channels.