In “Input select” mode of this channel a brown box with a telephone is visible. Touching this icon will
open the telephone screen to put the hybrid on and off hook and to dial a telephone number. Dialing
is done with and internal DTM tone generator and most hybrids are transparent for these tones.
You can connect several hybrids this way each using another AUX for the return signal. Make sure the
AUX volume of the corresponding input is closed and all others open.
D4 / EA815/1 telephone hybrid cable diagram:
In this example EA815/1 hybrid remote is connected to GPIO 1
Eela Audio D4 manual
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