Navien KD One UHA-422SG/M User Manual page 13

Call signal through Interphone
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Talk LED ickers and Interphone
call signal melody rings.
(1 time on the videophone)
'INTERPHONE' appears at the top of the screen
Call signal to Interphone from video-phone
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When you push and hold the
"Talk" Button for more than 1 second,
the Talk LED illuminates and you are
in the state of connection along with
call signaling to Interphone
'INTERPHONE' appears at the top of the screen
If "Talk" Button is pushed, Talk LED
illuminates and conversation starts.
When the receiver is picked up,
talking starts.(up to 1 minute)
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