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3. Auxiliary Inputs/Outputs
All ETP-120 Series models include one (1) Auxiliary Input. Some models are optionally available in
a configuration that provides one (1) Auxiliary Output (only models numbers with the X designator).
Auxiliary Input
The Auxiliary Input connection is comprised of the red-red wires. This input accepts a standard dry
contact closure.
Auxiliary Output
The ETP-120 Series is optionally available in a configuration that provides one (1) Auxiliary
Output (only models numbers with the X designator).
The single Auxiliary Output is rated at a maximum of 500 mA at 200VDC. This Auxiliary Output
provides a dry contact closure when the unit goes off-hook.
The Auxiliary Output connection can be found on N.O. and COM pins.
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ETP-120 Series Phone
Installation & Operation Manual
Rev. 7/2/2021
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