Northern Airborne Technology AMS50 - Manual (Page 53)

SM50 Rev. 4.00 AMS50-000 Stereo Audio Panel with Marker Manual
3.2.8 Optional
Features
3.2.8.1 Telephone Interlock
At installation, COM3 can be configured as a telephone interlock for full duplex
operation. Selecting the COM3 RX Select switch provides the ability to monitor phone
ringer audio or conversation. If the ringer audio is separate from the phone audio, it
should be connected to one of the direct audio inputs.
To answer the phone or make a call, choose the COM3 TX selection. This causes the
respective (selected) crew’s microphone to become ‘hot’ when selected from the front
panel with no need for the operator to activate the PTT switch. The COM3 input can
only be a COM radio or a Telephone, but not both in the same installation.
In ‘non-split’ mode, both the Pilot’s and Co-pilot’s mics are active.
3.2.8.1 Karaoke
The AMS50-000 may be configured at the time of installation to allow Music Mute
defeat. When activated by a hard or switched ground, the music does not mute in the
CREW and ALL mode, allowing both music and intercom simultaneously (‘karaoke’). In
PLT ISO the music is always muted for the Pilot only. When the remote switch is not
activated, the normal muting scenarios are followed.
3.3 Start-Up Selections
At power-up, the AMS50 will default to the following selections:
SENS – LO, PLT MIC 1, CPLT MIC 1, ALL mode, SPKR - off, Radio Audio - off.
The VOX indicator is dependent on the VOX control pot setting.
End of section 3.0
Nov 12, 2003 Page 3-7
ENG-FORM: 806-0104.DOT
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