Audio Entry System
simple 4 wires connected
PL330N4
MR220N4
MR250N4
outdoor sation
Audio handset
1. Press the button
the
to release
door.
2
an indoor call
. When
another
, pick
phone
up the handset, then
.
can talk smoothly
O pera tion
Ha nd set
of
Unlocking
Intercom
Guard station
G220N4
3.
Pick up the
handset to talk
with the visitor.
4 Pick up the handset
to listen the outside
through the outdoor
station when no
operation, and lay
down the handset to
stop listening.
Talking
Listening
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