Quick
Installation
Guide
X-50
40
PPPoE
–
Point
‐
to
‐
Point
Protocol
over
Ethernet
–
This
transport
protocol
is
used
on
telephone
networks
as
“ATM”,
where
the
DSL
modem
encapsulates
PPP
packets
inside
ATM
cells
and
sends
them
over
a
WAN
Connection.
Protocol
–
A
clearly
defined
way
of
doing
something.
PSTN
–
Public
Service
Telephone
Network
–
Is
the
generic
name
given
to
the
legacy
telephone
company
lines.
Remote
Worker
–
A
remote
worker
is
someone
that
will
be
using
the
telephone
system’s
resources
but
does
not
reside
in
the
same
physical
area.
Router
–
A
router
is
used
to
direct
incoming
and
outgoing
data
packets.
A
router
is
often
used
to
assign
DHCP
Addresses,
basic
Internet
security
and
Network
Address
Translation
(NAT).
SIP
–
Session
Initiated
Protocol
–
This
protocol
was
specifically
developed
for
transmitting
voice
over
the
Internet,
by
communications
professionals.
SIP
has
very
little
“overhead”
helping
to
eliminate
jitter
and
latency.
Although
not
yet
realized,
SIP
was
developed
as
an
“universal
standard”,
and
the
goal
is
to
make
SIP
phones
as
common
as
standard
2500
sets.
Static
IP
Address
–
See
IP
address
SSID
–
Service
Set
Identifier
–
is
the
name
that
identifies
a
particular
wireless
LAN.
This
name
is
broadcast
and
can
easily
be
found
by
another
wireless
device.
Subnet
Mask
Address
–
The
Subnet
Mask
Address
is
used
to
segment
(divide)
a
network
into
multiple
networks.
Also,
using
a
complex
mathematical
formula,
the
Subnet
Mask
Address
is
used
to
determine
how
many
IP
Addresses
are
available
per
Class.
Basically,
the
lower
the
number,
the
more
IP
Addresses
are
available.
For
example,
if
the
Subnet
Mask
Address
is
255.255.255.0,
only
the
last
number
is
0,
so
the
maximum
number
of
IP
addresses
possible
is
254
(both
zero
0
and
255
are
reserved).
If
the
Subnet
Mask
Address
is
255.255.0.0
then
the
possible
number
of
IP
addresses
becomes
255
2
or
66,000.
Finally
if
the
Subnet
Mask
Address
is
255.0.0.0
then
the
possibilities
are
255
3
or
16.8
million
addresses.
The
Subnet
Mask
Address
consists
of
a
group
of
4
numbers
(Octets),
each
ranging
from
0~255,
and
is
usually
written
as
xxx.xxx.xxx.xxx.
Subnet
Mask
Max
Subnets
Client
Devices
255.255.255.0
1
254
255.255.240.0
16
65,280
255.255.224.0
32
261,120
255.255.192.0
64
1,044,480
255.255.128.0
128
4,177,920
255.255.0.0
255
16,581,375
VoIP
–
Voice
over
Internet
Protocol
–
Voice
over
IP
is
a
protocol
that
defines
the
transport
of
voice
packets,
using
Internet
Protocol,
over
a
LAN,
WAN
or
Internet.
