If
DHCP
is
selected
then
the
WAN
interface
will
not
be
configurable
as
it
obtains
all
its
network
parameters
from
the
DHCP
server.
DHCP
should
be
used
cautiously
asallIP
extensions
registerto
the
IPPBX
system
through
the
WAN
interface
and
as
DHCP
addresses
can
change
and
IP
extensions
need
to
know
the
address
of
the
IPPBX
at
all
times.
It
is
best
practice
to
configure
WAN
address
with
a
Static
IP.
PPPoE
CooVox
IPPBX
can
be
connected
to
the
network
via
ADSL
modem
by
means
of
Point
‐
to
‐
Point
Protocol
over
Ethernet
(PPPoE)dial
‐
up.
In
such
a
situation,
extensions
will
subscribe
to
the
IPPBX
system
through
the
LAN
port,
while
WAN
port
can
be
used
for
remote
extensions.
If
PPPoE
is
set,
you
have
to
specify
the
username
and
password
given
by
your
ISP
and
the
IPPBX
system
will
dial
‐
up
to
the
ISP
and
once
successfully
connected,
you
will
have
Internet
access
on