Masterclock
GMR
User
Manual
v2
–
2016.12
33
DEVICE
SETTINGS
>
DISPLAY
PROPERTIES
Here
you
can
change
the
brightness
of
the
display
or
modify
the
presentation
of
the
date
and
time.
You
can
change
the
display
from
UTC
to
local
time
and
you
can
alternate
times
with
dates
and
set
the
rate
at
which
they
change.
COMMUNICATIONS
CONTROL
Telnet
and
SNMP
are
configured
using
the
Communications
Control
button.
Telnet
is
a
TCP/IP
protocol
through
which
the
GMR
can
be
configured
via
a
command
line.
Almost
all
of
the
settings
available
in
WinDiscovery
are
also
available
via
Telnet.
The
default
port
number
23
cannot
be
changed.
SNMP
stands
for
Simple
Network
Management
Protocol.
This
protocol
enables
a
PC
application
(called
an
SNMP
Manager
or
MIB
Browser)
to
get
information
from
the
SNMP
Agent
in
the
GMR.
That
information
conveys
the
network
identity
and
status
of
the
GMR,
like
the
number
of
packets
transmitted
or
received,
the
number
of
communication
errors,
etc.
In
addition
to
that
standard
SNMP
data,
Masterclock
has
created
a
custom
set,
called
a
custom
MIB,
which
can
be
imported
into
a
MIB
Browser.
It
is
available
for
download
from
our
website.
It
conveys
data
such
as
this:
NTP
leap
second
setting,
stratum
level,
precision,
reference
delay,
poll
interval,
source
and
offset.
Device
description,
processor,
firmware
version,
serial
number
and
model.
GPS
receiver
health,
latitude,
longitude
and
number
of
satellites
visible.
The
lock
status
of
NTP,
Time
Code,
GPS,
PTP,
NMEA
and
NENA.