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14  NTU Optical Network Terminals 
RJ-11 port for connecting analogue phone 
4 RJ-45 ports for connecting network devices 
Wi-Fi enabling/disabling button 
enables automatically protected Wi-Fi connection for the device 
functional key that reboots and resets the device to the factory settings 
SC port (socket) for PON with GPON interface 
Figure 7 shows the NTU-RG-1421GC-Wac front panel layout. 
 
Figure 7 – NTU-RG-1421GC-Wac front panel layout  
Table 7 lists LEDs located on the device front panel. 
Table 7 – Description of the LEDs located on the front panel 
power and activity status indicator  
configuration and hardware status indicator  
Ethernet port activity indicator 
Wi-Fi activity indicator for 2.4 GHz 
Wi-Fi activity indicator for 5 GHz 
FXS port activity indicator  
2.6   LED Indication 
2.6.1   NTU-RG-1421G-Wac, NTU-RG-1421G-WZ, NTU-RG-1431G-Wac 
LED indicators located on the front panel represent the current state of the device. 
Possible states of the LEDs are listed in Table 8. 
Table 8 – Light indication of the device 
10/100Mbps connection has been established 
1000Mbps connection has been established