Half-duplex
intercom
allows
high
sound
level
in
both
transmission
(talk)
and
reception
(listen),
and
extremely
clear
sounds.
That
means zero
feedback
noise,
no
complicated
sound
adjustments
and
corrections
to
be
making,
no
compromise
between
transmission
and
reception
sound
quality,
clear
talk
and
loud
sound
in
both
channels
as no full-duplex equipment will ever
give you.
In
addition
that
level
of
sound
with
these
door
entry
systems
allows
true
and
effective
security
monitoring.
All
outdoors
ambient
sounds
are
picked
up
for
clear
and
effortless
audition
at
handsets.
Level
and
clarity
of
sounds
coming
in
from
doorphones
allows
easy
recognition
of
arriving
guests,
enhancing
security
features.
Note
that
sound
level
and
clarity
do
not
degrade
as
more
doorphones
are
added.
For
a
system
with
full-duplex
intercom
(requires
no
user
switching),
see
the
PhoneBell
Q-10
system.
Ultimatoll
Door
Entry
Systems
