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The
possibility
of
only
one
resident
with
no
permanent
phone
service
at
any
point
in
time
makes
the
whole
auto-dialer entry system
practically unusable
for
the
application.
With
an
auto-dialer
entry system,
availability
of
entry
access
services
in
a
private
building
becomes
totally
dependent
on
the
quality
level
and
continued
availability
of
phone
services
from
the
public
local
phone
company.
The
use
of
a
dedicated
phone
line
by
auto-dial
entry systems inconveniently
brings
additional
charges
to
condominium
monthly
bills
since
the condominium
is
billed
by
the
local
phone
company
for
the
use
of
the
dedicated
phone
line.
Phone
companies
consider
these
lines
as
business
lines
and
bill
them
accordingly
on
a
per
call
basis,
a
bill
that
can
be
fairly
high
if
the
condominium
community
has
frequent
visitors.
Where
entry
access
control
is
required
for
a
second
or
third entry
door,
these
extra
panels
might
additionally
need
individual
phone
lines,
increasing
the
line
usage
bill.
Where they do not, simultaneous door entry calls at the various entrances,
which do occur, cannot be processed, simply because there is only one
phone line to convey all these calls. In
any
of
these
cases
the
use
of
a
dedicated
phone
line
makes
auto-dial
systems
directly
vulnerable
to
all
manners
of
call
frauds
(long
distance
and
900).
Further,
it
is not
rare nowadays
to
find
in
many
buildings
tenants
with no
regular
phone
service
but
only
cellular
phone service.
Since
the
phone
companies
bill
wireless
calls
both
to
the
caller
and
to
the
subscriber
who
receives
the
call,
the
toll
from
wireless
calls
generated
by
the
auto-dial
entry
system
can
be
quite
harsh
both
on
the
condominium
and
on individual
tenants
with
cell
phone
service
as
their
basic
phone
service.
continued...
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Building
Entry
Intercom
Tutorial
