LUCIA Party-Line Circuits
1.
Clear-Com Tecpro Mode Indicator
This indicates the party-line is set to interface with the Clear-Com two wire standard (which is also
used by Tecpro (amongst others)). In this configuration power is supplied to the party-line
through pin 2 and channel 1 audio through pin 3 (channel 2 audio is not used).
2.
RTS Mode Indicator
This indicates the party-line is set to interface with the RTS (Telex) two wire standard. In this
configuration power and channel 1 audio are supplied to RTS units through pin 2 and a second
audio channel (CH2) is supplied through pin 3.
3.
Mode Selector
This control is used to toggle between the RTS and Clear-Com modes.
To operate the ‘MODE’ button must be pressed for at least three seconds before change will take
place.
4.
Wet Mode
This indicates that the unit is providing power to the party-line and 200 ohm termination to the
line.
To change between ‘wet’ and ‘dry’ the ‘POWER’ button must be pressed for at least three seconds
before the change will take place.
5.
Dry Mode
This indicates that the unit is not providing power to the line and is not terminating the line.
The unit is locked in this mode when it is powered by POE.
To change between ‘wet’ and ‘dry’ the ‘POWER’ button must be pressed for at least three seconds
before the change will take place.
6.
Power Selector
This control is used to toggle between the Wet and Dry modes and must be pressed for at least
three seconds before the change will take place.
Clear-Com
RTS
WET
DRY
400 Ohms
NULL
MODE
POWER
IMPEDANCE
NULL
AUDIO FROM
PARTY-LINE
AUDIO TO
PARTY-LINE
CH 1
CH 2
PARTY-LINE CIRCUIT A
Tecpro
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