VoIP
ATA
with
router
function
User
Manual
42
Time
Setting
You
can
maintain
the
system
time
by
synchronizing
with
a
public
time
server
over
the
Internet.
Auto
Provision
Enable
or
disable
the
auto
‐
provisioning
feature.
If
enabled,
the
phone
will
try
to
download
the
two
configuration
files
from
the
provisioning
server
via
FTP/TFTP
/
HTTP
on
system
startup;
Default
is
disabled.
DDNS
Dynamic
DNS
is
a
service,
that
provides
you
with
a
valid,
unchanging,
internet
domain
name
(an
URL)
to
go
with
that
(possibly
ever
changing)
IP
‐
address.
The
DDNS
(Dynamic
DNS)
service
allows
you
to
alias
a
dynamic
IP
address
to
a
static
hostname,
allowing
your
computer
to
be
more
easily
accessed
from
various
locations
on
the
Internet.
Without
DDNS,
the
users
should
use
the
WAN
IP
to
reach
internal
server.
It
is
inconvenient
for
the
users
if
this
IP
is
dynamic.
With
DDNS
supported,
you
apply
a
DNS
name
(e.g.,
www.TA
‐
201.com)
for
your
server
(e.g.,
Web
server)
from
a
DDNS
server.
The
outside
users
can
always
access
the
web
server
using
the
www.ata.com
regardless
of
the
WAN
IP.
When
you
want
your
internal
server
to
be
accessed
by
using
DNS
name
rather
than
using
the
dynamic
IP
address,
you
can
use
the
DDNS
service.
The
DDNS
server
allows
to
alias
a
dynamic
IP
address
to
a
static
hostname.
