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Billion 800VGT Router
Advanced Options
ADSL
Parameters
help
to
interpret
your
ADSL
line
statistics.
SNR
Margin:
This
is
known
as
Signal
to
Noise
Ration
Margin.
It
is
the
ratio
between
DSL
strength
and
signal
noise.
This
margin
is
measured
in
decibels
(dB).
Higher
the
dB
figures
better
the
DSL
strength
is
relative
to
the
noise,
and
better
chance
to
get
faster
speed.
THE
HIGHER
THE
BETTER
Line
Attenuation:
This
measures
the
signal
loss
in
decibel
(dB)
between
the
DSLAM
and
the
router.
The
lower
the
attenuation
dB
figures,
the
better
the
DSL
strength/speed.
THE
LOWER
THE
BETTER.
CRC
Errors:
It
is
known
as
Cyclic
Redundancy
Check
Error.
It
is
the
use
of
checksums
to
detect
transmission
errors.
Latency:
This
includes
two
channels,
Fast
and
Interleaved.
It
displays
the
channel
adopted
by
your
ISP.
Capability:
There
are
more
combinational
ADSL
modulation
modes
to
be
selected.
²
GDMT:
ADSL
connection
will
be
limited
to
ADSL1
(G.DMT
/
G.Lite)
only.
²
BIS+:
ADSL
connection
will
be
limited
to
ADSL2+
only.
(If
you
are
ADSL1
subscriber
DO
NOT
select
this
option).
²
BIS+/T1413:
ADSL
connection
will
be
limited
to
ADSL2+
and
ADSL1
T1.413
only.
²
BIS+/BIS:
ADSL
connection
will
be
limited
to
ADSL2+
and
ADSL2
only.
²
BIS+/BIS/GDMT/T1413:
ADSL
connection
will
be
limited
to
ADSL2+,
ADSL2
and
ADSL1
G.DMT
&
G.Lite
&
T1.413.
²
BIS+/BIS/T1413:
ADSL
connection
will
be
limited
to
ADSL2+,
ADSL2
and
T1.413.
²
BIS+/BIS/GDMT:
ADSL
connection
will
be
limited
to
ADSL2+,
ADSL2
and
ADS1
(G.DMT/G.Lite)
only.
²
DISABLE:
This
disable
function
will
disconnect
your
ADSL
synch.
Use
it
with
caution.
S=1/2
Mode:
This
is
a
ADSL1
protocol
that
can
increase
the
downstream
speed
up
to
12Mpb.
Please
check
further
with
your
ISP
if
this
option
can
be
enabled
or
not.
51
Chapter
4:
Configuration
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Page 52 / 143
Billion 800VGT Router
System
Here
are
the
items
within
the
System
section:
Time
Zone,
Remote
Access,
Firmware
Upgrade,
Backup/Restore,
Restart
and
User
Management.
Time
Zone
This
router
does
not
have
a
real
time
clock
on
board;
instead,
it
uses
the
Simple
Network
Time
Protocol
(SNTP)
to
get
the
current
time
from
an
SNTP
server
outside
your
network.
Choose
your
local
time
zone,
click
Enable
and
click
the
Apply
button.
After
a successful
connection
to
the
Internet,
the
router
will retrieve
the
correct
local
time
from
the
SNTP
server
you
have
specified.
If
you
prefer
to
specify
an
SNTP server
other
than
those
in
the
list,
simply
enter
its
IP
address
as
shown
above.
Your
ISP
may
provide
an SNTP
server
for
you
to
use.
Daylight
Saving
is
also
known
as
Summer
Time
Period.
Many
places
in
the
world
adopt
this
during
summer
time
to
move
one
hour
of
daylight
from
morning
to
the
evening
in
local
standard
time.
Check
Automatic
box
to
automatically
set
your
local
time.
Resync
Period
(in
minutes)
is
the
periodic
interval
the
router
will
wait
before
it
re-synchronizes
the
router’s
time
with
that
of
the
specified
SNTP
server.
In
order
to
avoid
unnecessarily
increasing
the
load on
your
specified
SNTP
server
you
should
keep
the
poll
interval
as
high
as
possible
–
at
the
absolute
minimum
every
few
hours
or
even
days.
52
Chapter
4:
Configuration
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Page 53 / 143
Billion 800VGT Router
Remote
Access
To
temporarily
permit
remote
administration
of
the
router
(i.e.
from
outside
your
LAN),
select
a
time
period
the
router
will
permit
remote
access
for
and
click
Enable.
You
may
change
other
configuration
options
for
the
web
administration
interface
using
Device
Management
options
in
the
Advanced
section
of
the
GUI.
If
you
wish
to
permanently
enable
remote
access,
choose
a
time
period
of
0
minute.
Firmware
Upgrade
Your
router’s
“firmware”
is
the
software
that
allows
it
to
operate
and
provides
all
its
functionality.
Think
of
your
router
as
a
dedicated
computer,
and
the
firmware
as
the
software
it
runs.
Over
time
this
software
may
be
improved
and
modified.
Your
router
allows
you
to
upgrade
the
software
it
runs
to
take
advantage
of
these
changes.
Clicking
on
Browse
will
allow
you
to
select
the
new
firmware
image
file
you
have
downloaded
to
your
PC.
Once
the
correct
file
is
selected,
click
Upgrade
to
update
the
firmware
in
your
router.
DO
NOT
power
down
the
router
or
interrupt
the
firmware
upgrading
while
it
is
still
in
process.
Improper
operation
could
damage
the
router.
53
Chapter
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Configuration
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Billion 800VGT Router
Backup
/
Restore
These
functions
allow
you
to
save
and
backup
your
router’s
current
settings
to
a
file
on
your
Computer,
or to
restore
a
previously
saved
backup.
This
is
useful
if
you
wish
to
experiment
with
different
settings,
knowing
that
you
have
a
backup
handy
in
the
case
of
any
mistakes.
It
is
advisable
to
backup
your
router’s
settings
before
making
any
significant
changes
to
your
router’s
configuration,
as
well
as
before
performing
a
firmware
upgrade.
Press
Backup
to
select
where
on
your
local
computer
to
save
the
settings
file.
You
may
also
change
the
name
of
the
file
when
saving
if
you
wish
to
keep
multiple
backups.
Press
Browse
to
select
a
file
from
your
computer
to
restore.
You
should
only
restore
settings
files
that
have
been
generated
by
the
Backup
function,
and
that
were
created
when
using
the
current
version
of
the
router’s
firmware.
Settings
files
saved
to
your
computer
should
not
be
manually
edited
in
any
way.
After
selecting
the
settings
file
you
wish
to
use,
pressing
Restore
will
load
those
settings
into
the
router.
Restart
Router
Click
Restart
with
option
Current
Settings
to
reboot
your
router
(and
restore
your
last
saved
configuration).
If
you
wish
to
restart
the
router
using
the
factory
default
settings
(for
example,
after
a
firmware
upgrade
or
if
you
have
saved
an
incorrect
configuration),
select
Factory
Default
Settings
to
reset
to
factory
default
settings.
You
may
also
reset
your
router
to
factory
settings
by
holding
the
small
RESET
pinhole
button
on
the
back
of
your
router
in
for
more
than
6
seconds
whilst
the
router
is
turned
on,
and
then
power
cycling
your
router.
54
Chapter
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Configuration
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Billion 800VGT Router
User
Management
In
order
to
prevent
unauthorized
access
to
your
router’s
configuration
interface,
it
requires
all
users
to
login
with
a
password.
You
can
set
up
multiple
user
accounts,
each
with
their
own
password.
You
are
able
to
Edit
existing
users
and
Create
new
users
who
are
able
to
access
the
device’s
configuration
interface.
Once
you
have
clicked
on
Edit,
you
are
shown
the
following
options:
You
can
change
the
user’s
password
,
whether
their
account
is
active
and
valid
,
as
well
as
add
a
comment
to
each
user
account.
These
options
are
the
same
when
creating
a
user
account,
with
the
exception
that
once
created
you
cannot
change
the
username.
You
cannot
delete
the
default
admin
account;
however,
you
can
delete
any
other
created
accounts
by
clicking
Delete
when
editing
the
user.
You
are
strongly
advised
to
change
the
password
on
the
default
“
admin
”
account
when
you
receive
your
router,
and
any
time
you
reset
your
configuration
to
Factory
Defaults.
55
Chapter
4:
Configuration
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