NTU-52V/VC. User manual (user)
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
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