NTU-52V/VC. User manual (user)
14
Table 6 – Description of NTU-52V front and top panel LEDs
#
Front panel element
LED Status
Description
1
- power indicator
green
power is connected
off
power is not connected
2
- operation status indicator
flashes slowly
the firmware update process is in
progress
orange
device startup is completed, the
default configuration is set
green
device startup completed, the current
device configuration differs from the
default
3
- optical interface operation
indicator
off
the device is not connected to OLT
flashes green
the device is in the registration
process on OLT
green
the device is connected and
registered on OLT
4
- optical interface status
indicator
off
the device is connected to OLT
flashes red
laser is off at LT side
red
there is no signal from OLT
5
- 'Internet' status indicator
off
there is no active connection to
Internet
green
the device is ready, connection
established
flashes green
the device is in connection process
6
- SIP registration indicator
off
VoIP service is not configured
green
VoIP service is successfully activated
flashes green
port is not registered or SIP
authentication is not completed on
server
7
- FXS port activity indicator
off
phone is off hook
flashes green
receiving a call