ELTEX NTU-RG-1421G-WZ User manual

Optical network terminals
NTU-RG-1421G-Wac NTU-RG-1431G-Wac
NTU-RG-1421GC-Wac NTU-RG-1421G-WZ
Operation Manual, version 1.4 (June 2018)
Firmware version 3.32.0
IP address: 192.168.1.1
User name: user
password: user
http://eltex-co.ru/en/support/downloads/

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2NTU Optical Network Terminals
Document
version
Suitable
firmware version
Issue date
Revisions
Version 1.3
3.30.0
Fourth issue
Version 1.2
3.28.2
July 2017
Third issue
Version 1.1
3.28.1
December 2016
Second issue
Version 1.0
3.28.0
August 2016
First issue
NOTES AND WARNINGS
Notes contain important information, tips or recommendations on device operation and setup.
Warnings inform users about hazardous conditions, which may cause injuries or device damage and
may lead to the device malfunctioning or data loss.

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NTU Optical Network Terminals 3
CONTENTS
1 INTRODUCTION ...................................................................................................................................................... 5
2 PRODUCT DESCRIPTION ......................................................................................................................................... 6
2.1 Purpose ........................................................................................................................................................... 6
2.2 Models............................................................................................................................................................. 7
2.3 Device Specification ........................................................................................................................................ 7
2.4 Main Specifications ....................................................................................................................................... 10
2.5 Design............................................................................................................................................................ 12
2.5.1 NTU-RG-1421G-Wac/NTU-RG-1421G-WZ/NTU-RG-1431G-Wac......................................................... 12
2.5.2 NTU-RG-1421GC-Wac .......................................................................................................................... 13
2.6 LED Indication................................................................................................................................................ 14
2.6.1 NTU-RG-1421G-Wac, NTU-RG-1421G-WZ, NTU-RG-1431G-Wac ........................................................ 14
2.6.2 NTU-RG-1421GС-Wac .......................................................................................................................... 15
2.6.3 Indication of LAN Interfaces................................................................................................................. 16
2.7 Reboot/Reset to factory defaults ................................................................................................................. 16
2.8 Delivery Package ........................................................................................................................................... 16
3ARCHITECTURE OF DEVICES ................................................................................................................................. 17
3.1 NTU-RG architecture..................................................................................................................................... 17
4 CONFIGURATION OF NTU-RG-1421G-WAC, NTU-RG-1421G-WZ, NTU-RG-1431G-W AND NTU-RG-1421GC-W
VIA WEB INTERFACE. USER ACCESS......................................................................................................................... 19
4.1 The “Device Info” menu................................................................................................................................ 20
4.1.1 The “Summary” submenu .................................................................................................................... 20
4.1.2 The “WAN” submenu. The Status of Services...................................................................................... 20
4.1.2.1 The “General” submenu. General information............................................................................ 20
4.1.2.2 The “Detail” submenu. Detailed Information.............................................................................. 21
4.1.3 The “LAN” submenu. Monitoring of LAN Ports. Monitoring of Wi-Fi Interface Status ....................... 21
4.1.4 The “Statistics” submenu. Traffic flow information for device ports .................................................. 21
4.1.5 The “Route” submenu. Routing table preview.................................................................................... 22
4.1.6 The “ARP” submenu. Display of the ARP Protocol Cache.................................................................... 23
4.1.7 The “DHCP” submenu. Active DHCP leases.......................................................................................... 23
4.1.8 The “Wireless Stations” submenu. Connected wireless devices ......................................................... 24
4.1.9 The “Wireless Monitor” submenu. Discovered Wi-Fi networks .......................................................... 24
4.1.10 The “Voice” submenu. Monitoring of telephone ports ..................................................................... 25
4.2 The “Advanced Setup” menu. Advanced configuration................................................................................ 25
4.2.1 The “LAN” submenu. Configuration of Main Parameters.................................................................... 25
4.2.2 The “NAT” submenu. NAT Settings ...................................................................................................... 26
4.2.2.1 The “Virtual Servers” submenu. Virtual server settings .............................................................. 26
4.2.2.2 The “Port Triggering” submenu. Port Triggering Settings............................................................ 27
4.2.2.3 The “DMZ Host” submenu. Demilitarized Zone Settings............................................................. 29
4.2.3 The “Security” submenu. Security Settings.......................................................................................... 29
4.2.3.1 The “IP Filtering” submenu. Address Filtering Settings ............................................................... 29
4.2.3.2 The “MAC Filtering Setup” submenu. Filtering Settings for MAC Addresses .............................. 31
4.2.4 The “Parental Control” submenu: restriction settings......................................................................... 32
4.2.4.1 The “Time Restriction” submenu. Session Time Restriction Settings.......................................... 32
4.2.4.2 The “Url Filter” submenu. Internet Access Restriction Settings .................................................. 33
4.2.5 The “Dynamic DNS” submenu. Dynamic DNS Configuration............................................................... 34
4.2.6 The “Print Server” submenu. Print Server Configuration .................................................................... 37
4.2.7 The “DLNA” submenu. DLNA server configuration.............................................................................. 37
4.2.8 The “Z-Wave” menu............................................................................................................................. 38
4.2.9 The “UPnP” submenu. Autoconfiguration of network devices............................................................ 38
4.3 The “Wireless” menu. Wireless network configuration................................................................................ 39
4.3.1 The “Basic” submenu. General settings............................................................................................... 39

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4NTU Optical Network Terminals
4.3.2 The “Security” submenu. Security settings.......................................................................................... 40
4.3.3 The “MAC Filtering” submenu. Filtering Settings of MAC Addresses.................................................. 43
4.3.4 The “Wireless Bridge” submenu. Wireless Connection Settings in Bridge Mode................................ 44
4.3.5 The “Advanced” submenu.................................................................................................................... 45
4.3.6 The “Connection wizard” submenu ..................................................................................................... 47
4.4 The “Storage Service” menu. File storage service ........................................................................................ 47
4.4.1 The “Storage Device Info” submenu. Information about connected USB devices.............................. 47
4.4.2 The “User Accounts” submenu. Configuration of Samba users........................................................... 47
4.5 The “Management” menu. Device Management......................................................................................... 48
4.5.1 The “Settings” submenu....................................................................................................................... 48
4.5.1.1 The “Restore Default” submenu.................................................................................................. 48
4.5.2 The “PON Password” submenu. Change the PON access password ................................................... 49
4.5.3 The “Internet time” submenu. System Time Settings ......................................................................... 49
4.5.4 The “Ping” submenu. Test the Availability of Network Devices .......................................................... 50
4.5.5 The “Password” submenu. Access control configuration (setting passwords).................................... 50
4.5.6 The “System Log” submenu. System Log Review and Configuration .................................................. 51
4.5.6.1 The “Configuration” submenu. System Log Configuration.......................................................... 51
4.5.6.2 The “View” submenu. System Log Display................................................................................... 52
4.5.7 The “Update Software” submenu........................................................................................................ 52
4.5.8 The “Reboot” submenu. Device Reboot .............................................................................................. 52
NTU-RG ACCEPTANCE CERTIFICATE AND WARRANTY........................................................................................ 53

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NTU Optical Network Terminals 5
1INTRODUCTION
A GPON is a network of passive optical networks (PON) type. It is one of the most effective state-of-the-
art solutions for the 'last mile' issue that significantly reduces the required amount of cable and provides data
transfer with downlink rate up to 2.5Gbps and uplink rate up to 1.25Gbps. Being used in access networks, GPON-
based solutions allow end users to have access to new services based on IP protocol in addition to more
common ones.
The key GPON advantage is the use of one optical line terminal (OLT) for multiple optical network
terminals (ONT). OLT converts Gigabit Ethernet and GPON interfaces and is used to connect a PON network with
data communication networks of a higher level. ONT is designed to connect terminal equipment of user to
broadband access services. ONT device can be used in residential estates and offices.
The range of ONT NTU equipment produced by ELTEX comprises of the following terminals:
NTU-RG-1421G-Wac, NTU-RG-1431 G-Wac, NTU-RG-1421GС-Wac and NTU-RG-1421G-WZ, which are
designed to support four UNIs: 10/100/1000Base-T, FXS, Wi-Fi, USB, CaTV
1
and Z-Wave
2
.
This operation manual describes intended use, key specifications, configuration, monitoring, and firmware
update for NTU-RG optical terminal series.
1
Only for NTU-RG-1421GС-Wac
2
Only for NTU-RG-1421G-WZ

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6NTU Optical Network Terminals
2PRODUCT DESCRIPTION
2.1 Purpose
NTU-RG GPON ONT (Gigabit Ethernet Passive Optical Network) devices represent high-performance
network terminals designed for connection with upstream GPON equipment and providing end user with
broadcast access services. GPON connection is established through PON interface, while Ethernet interfaces are
used for connection of terminal equipment.
The key GPON advantage is the optimal use of bandwidth. The technology is the next step of high-speed
Internet applications for home and office. Being designed for home or office network deployment, these ONT
devices provide users, who live and work in distant flat buildings and business centres, with reliable connection
with high throughput at large distances.
With built-in router, these devices enable connection of local network equipment to broadband access
network. The terminals protect PCs from DoS and virus attacks with the help of firewall and filter packets to
control access based on ports and MAC/IP addresses of source and target. Users can configure a home or office
web site by adding a LAN port into DMZ. Parental Control enables filtration of undesired web sites, blocks
domains and allows for compilation of a schedule of Internet use. Virtual private network (VPN) provides mobile
users and branch offices with a protected communication channel for connection to a corporate network.
FXS port enables IP telephony and provides various useful features such as display of caller ID, three-way
conference call, phone book, and speed dialling. This makes dialling and call pick-up user friendly.
USB ports can be used for connection of USB devices (USB flash drives, external HDD).
NTU-RG-1421G-Wac, NTU-RG-1431G-Wac, NTU-RG-1421GC-Wac and NTU-RG-1421G-WZ network routers
allow Wi-Fi clients to be connected using IEEE 802.11a/b/g/n/ac standard. 802.11ac standard support ensures
data transfer rate of 1.3 Gbps and allows wireless network to be used for delivery of modern high-speed services
to client equipment. Two integrated Wi-Fi network controllers enable simultaneous 2.4GHz and 5GHz dual-band
operation.
NTU-RG-1421GC-Wac has a built-in RF port to connect digital and analogue TV (if the service is provided
by your service operator).
NTU-RG-1421G-WZ comes with Z-Wave module, which is used for “Smart Home” service providing.
Z-Wave is a wireless radio technology with low power consumption, which was designed specially for
remote control. In contrast with Wi-Fi and others IEEE 802.11 data transmission standards, that were designed
for large data streams, Z-Wave operates within frequency range up to 1 GHz and is optimized for the
transmission of simple control commands with low delays (for example, turn on/off, modify the volume,
brightness, etc.). The choice of low radio-frequency range for Z-Wave is caused by a small quantity of potential
interfering sources (in contrast with the high-usage 2.4 GHz band, which requires measures reducing possible
interferences from different home wireless appliances - Wi-Fi, ZigBee, Bluetooth).
Z-Wave is designed for creation of affordable and power-efficient consumer electronics, including battery-
operated devices such as remote controllers, smoke sensors, temperature sensors, humidity sensors, motion
sensors and other protective sensors.

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NTU Optical Network Terminals 7
2.2 Models
NTU-RG series devices are designed to support various interfaces and features—see Table 1.
Table 1 –Models
Model Name
WAN
LAN
FXS
Z-
Wave
RF
Wi-Fi
802.11
b/g/n
Wi-Fi
802.11 b/g/n/ac
USB
NTU-RG-1421G-
Wac
1xGPON
4х1Gigabit
1
-
-
+
802.11n, 2*2 -300Mbps –2.4GHz
802.11ac, 3*3 -1.3Gbps –5 GHz+
2
NTU-RG-1431G-
Wac
1xGPON
4х1Gigabit
1
-
-
+
802.11n, 3*3 -450Mbps - 2.4GHz
802.11ac, 3*3 -1.3Gbps –5 GHz
2
NTU-RG-
1421GC-Wac
1xGPON
4х1Gigabit
1
-
1
+
802.11n, 2*2 -300Mbps –2.4GHz
802.11ac, 3*3 -1.3Gbps –5 GHz+
1
NTU-RG-1421G-
WZ
1xGPON
4х1Gigabit
1
1
-
+
802.11n, 2*2 -300Mbps –2,4GHz
802.11ac, 3*3 -1.3Gbps –5 GHz+
2
2.3 Device Specification
The device is equipped with the following interfaces:
1 x RJ-11 port for analogue phone units;
1 x PON SC/APC port for connection to operator's network;
Ethernet RJ-45 LAN ports for connection of network devices:
–4 x RJ-45 10/100/1000Base-T ports.
802.11a/b/g/n/ac Wi-Fi transceiver;
2
1
x USB 2.0 ports for external USB or HDD storage;
Z-Wave submodule
2
;
1 RF port for CaTV connection
3
.
The terminal uses an external adapter for 220V/12V power supply.
The device supports the following functions:
Network functions:
–Operation in 'bridge' or 'router' mode;
–PPPoE support (PAP, CHAP, MSCHAP authentication);
–Static IP address and DHCP support (DHCP client on WAN, DHCP server on LAN);
–UPnP;
–IPSec;
–NAT support;
–Firewall support;
–NTP support;
–QoS support;
–IGMP snooping support;
–IGMP proxy support;
–Parental Control;
–Storage Service support;
–UPNP, SMB, FTP, DLNA, Print Server support;
–VLAN complying with IEEE 802.1Q.
1
NTU-RG-1421GC-Wac has one USB2.0 port
2
For NTU-RG-1421G-WZ
3
For NTU-RG-1421GC-Wac

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8NTU Optical Network Terminals
Wi-Fi:
–802.11 a/b/g/n/ac standard support;
–Simultaneous dual-band operation: 2.4GHz and 5GHz.
VoIP:
–SIP protocol support;
–Audio codecs: G.729 (A), G.711(A/U), G.723.1;
–ToS for RTP packets;
–ToS for SIP packets;
–Echo cancellation (G.164, G.165 guidelines);
–Silence detector (VAD);
–Comfortable noise generator;
–DTMF signals detection and generation;
–DTMF transmission (INBAND, RFC2833, SIP INFO);
–Fax transmission: upspeed/pass-through G.711, T.38.
Value Added Services:
–Call Hold;
–Call Transfer;
–Call Waiting Notification;
–Forward Unconditionally;
–Forward on 'No Answer';
–Forward on 'Busy';
–Caller ID Display for ETSI FSK;
–Caller ID Barring (Anonymous calling);
–Warmline;
–Flexible numbering plan;
–Voice mail notifications (MWI);
–Anonymous Call Blocking;
–Call Barring;
–Do not Disturb (DND).
Firmware update via web interface, TR-069, OMCI
Remote monitoring, configuration, and setup:
–TR-069;
–Web interface;
–OMCI;
–Telnet.

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NTU Optical Network Terminals 9
Figures 1, 2 show equipment use case for NTU-RG equipment.
Figure 1 –Use case for NTU-RG-1421G-Wac, NTU-RG1431G-Wac, and NTU-RG-1421GC-Wac
Figure 2 –Use case for NTU-RG-1421G-WZ

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10 NTU Optical Network Terminals
2.4 Main Specifications
Table 2 lists main specifications of the terminals.
Table 2 –Main specifications
VoIP Protocols
Supported protocols
SIP
Audio Codecs
Codecs
G.729, annex A
G.711(A/µ)
G.723.1 (5.3 Kbps)
Fax transmission: G.711, T.38
Parameters of Ethernet LAN Interface
Number of interfaces
4
Electric port
RJ-45
Data rate, Mbps
Autodetection, 10/100/1000 Mbps
duplex/half-duplex
Supported standards
IEEE 802.3i 10Base-T Ethernet
IEEE 802.3u 100Base-TX Fast Ethernet
IEEE 802.3ab 1000Base-T Gigabit Ethernet
IEEE 802.3x Flow Control
IEEE 802.3 NWay auto-negotiation
PON Interface Specifications
Number of PON interfaces
1
Supported standards
ITU-T G.984.x Gigabit-capable passive optical networks
(GPON)
ITU-T G.988 ONU management and control interface
(OMCI) specification
IEEE 802.1Q Tagged VLAN
IEEE 802.1p Priority Queues
IEEE 802.1D Spanning Tree Protocol
Connector type
SC/APC
Complies with ITU #T G.984.2
Transmission medium
Fibre optical cable SMF - 9/125, G.652
Splitting ratio
up to 1:128
Maximum range of coverage
20 km
Transmitter:
1310nm
Upstream connection speed
1244Mbps
Transmitter power
from +0.5 to +5 dBm
Optical spectrum width (RMS)
1 nm
Receiver
1490nm
Downstream connection speed
2488Mbps
Receiver sensitivity
from -8 to -28 dBm
Parameters of analogue user ports
Number of ports
1
Loop resistance
up to 2kΩ
Dialling
pulse/frequency (DTMF)
Caller ID display
yes
Wi-Fi Interface Specifications
Model
NTU-RG-1421G-Wac, NTU-RG-1421GC-Wac,
NTU-RG-1421G-WZ
NTU-RG-1431G-Wac
Standard
802.11a/b/g/n/ac
802.11a/b/g/n/ac

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NTU Optical Network Terminals 11
Frequency range
2400 ~ 2483.5MHz, 5150 ~ 5350MHz, 5650
~ 5850MHz
Simultaneous dual-band operation
2400 ~ 2483.5MHz, 5150 ~ 5350MHz, 5650
~ 5850MHz
Simultaneous dual-band operation
Modulation
CCK, BPSK, QPSK, 16 QAM, 64 QAM, 256
QAM
CCK, BPSK, QPSK, 16 QAM, 64 QAM, 256
QAM
Data rate, Mbps
–802.11b/g/n: 1-13
–802.11a/ac: 36-64, 132-165
–802.11b: 1, 2, 5.5 and 11Mbps
–802.11g: 6, 9, 12, 18, 24, 36, 48 and
54Mbps
–802.11n: 300Mbps (20MHz channel),
450Mbps (40MHz channel)
–802.11ac: 1300Mbps (80MHz)
–802.11b/g/n: 1-13
–802.11a/ac: 36-64, 132-165
–802.11b: 1, 2, 5.5 and 11Mbps
–802.11g: 6, 9, 12, 18, 24, 36, 48 and
54Mbps
–802.11n: 300Mbps (20MHz channel),
450Mbps (40MHz channel)
–802.11ac: 1300Mbps (80MHz)
Maximum transmitter
output power
–802.11b (11Mbps): 17dBm
–802.11g (54Mbps): 15dBm
–802.11n (MCS7): 15dBm
–802.11ас (5GHz): 19dBm
MAC protocol
CSMA/CA, ACK 32 MAC model
Security
64/128 bit WEP encryption
WPA, WPA2
802.1x
AES &TKIP
Supported operating
systems
Windows XP 32/64, Windows Vista 32/64, Windows 2000, Windows 7 32/64
Linux, VxWorks
MIMO
NTU-RG-1421G-Wac
2.4 GHz - 2х2, 5 GHz- 3х3
NTU-RG-1431G-Wac
2.4 GHz - 3х3, 5 GHz - 3х3
NTU-RG-1421GC-Wac
2.4 GHz - 2х2, 5 GHz - 3х3
NTU-RG-1421G-WZ
2.4 GHz - 2х2, 5 GHz - 3х3
Antenna gain
5dBi
Operating temperature
range
from 0 to +70 C
Control
Local control
Web interface
Remote control
Telnet, TR-069, OMCI
Firmware update
OMCI, TR-069, HTTP, TFTP
Access restriction
password
General parameters
Power supply
12V DC /220 AC power adapter
Power consumption
NTU-RG-1421G-Wac
15 W max
NTU-RG-1431G-Wac
15 W max
NTU-RG-1421GC-Wac
15 W max
NTU-RG-1421G-WZ
15 W max
Operating temperature range
from +5 to +40 C
Relative humidity
up to 80%
Dimensions
NTU-RG-1421G-Wac
187x120x32mm
NTU-RG-1431G-Wac
187x120x32 mm
NTU-RG-1421GC-Wac
217x120x49 mm
NTU-RG-1421G-WZ
187x120x32 mm
Weight
0.3kg

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12 NTU Optical Network Terminals
2.5 Design
2.5.1 NTU-RG-1421G-Wac/NTU-RG-1421G-WZ/NTU-RG-1431G-Wac
Network terminal is a desktop device enclosed in plastic housing.
The rear panel of the device is shown in Figure 3.
Figure 3 –NTU-RG-1421G-Wac, NTU-RG-1421G-WZ, NTU-RG-1431G-Wac rear panel layout
Connectors and controls located on the rear panel of are listed in Table 3.
Table 3 –Description of connectors and controls located on the rear panel
No.
Rear Panel Element
Description
1
On/Off
power button
2
12V
power adapter connector
3
PON
SC port (socket) for PON with GPON interface
4
USB
2 ports for connecting external drives and other USB devices
5
Phone
RJ-11 port for connecting analogue phone
6
LAN 10/100/1000 1..4
4 RJ-45 ports for connecting network devices
Figures 4, 5 show NTU-2(V) side and top panels.
Figure 4 –NTU-RG Top Panel Figure 5 –NTU-RG Side Panel

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NTU Optical Network Terminals 13
Top panel LED indicators are listed in Table 4.
Table 4 –Description of Top Panel LEDs
No.
Top Panel Element
Description
7
power and activity status indicator
8
optical interface activity indicator
9
Internet service status indicator
10

FXS port activity indicator
11
2.4
Wi-Fi activity indicator for 2.4GHz
12
5
Wi-Fi activity indicator for 5GHz
13
1..4
Ethernet port indicator
Side panel buttons are listed in Table 5.
Table 5 –Description of Side Panel Buttons
No.
Side Panel Element
Description
14
Reset
functional key that reboots the device and resets it to the factory
settings
15
Wi-Fi
Wi-Fi enabling/disabling button
16
WPS
enables automatically protected Wi-Fi connection for device
2.5.2 NTU-RG-1421GC-Wac
Subscribe terminal is designed as a desktop device in a plastic housing.
Figure 6 shows the device rear panel layout.
Figure 6 –The NTU-RG-1421GC-Wac rear panel layout
The connectors and controls located on the device rear panel are listed in Table 6.
Table 6 –Description of the connectors and controls of the device rear panel
No.
Rear Panel Element
Description
1
On/Off
power button
2
12V
power adapter connector
3
USB
port for connecting external drivers and other USB devices
4
TV
RF port for CaTV connection

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14 NTU Optical Network Terminals
5
Phone
RJ-11 port for connecting analogue phone
6
LAN 10/100/1000 1..4
4 RJ-45 ports for connecting network devices
7
Wi-Fi
Wi-Fi enabling/disabling button
8
WPS
enables automatically protected Wi-Fi connection for the device
9
F
functional key that reboots and resets the device to the factory settings
10
PON
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
No.
Front panel element
Description
11
PON
power and activity status indicator
12
Status
configuration and hardware status indicator
13
LAN 1..4
Ethernet port activity indicator
14
Wi-Fi 2.4
Wi-Fi activity indicator for 2.4 GHz
Wi-Fi 5
Wi-Fi activity indicator for 5 GHz
15
Phone
FXS port activity indicator
16
TV
CaTV activity indicator
17
Power
power 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
LED indicator
LED state
Device status
1..4
green
10/100Mbps connection has been established
orange
1000Mbps connection has been established

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NTU Optical Network Terminals 15
flashes
packet data transmission is in progress
on
phone is off-hook
flashes
port is not registered or authorization is not
completed on SIP server
flashes slowly
receiving call signal
2.4/5
green
Wi-Fi is active
flashes
Wi-Fi data transfer
off
Wi-Fi is not active
off
interface with the Internet identifier is not configured
green
interface with the Internet identifier is configured and
IP address is obtained
orange
interface with the Internet identifier is configured but
IP address is not obtained
flashes green
device firmware update is in progress
off
device startup is in progress
green
connection between optical line terminal and the
device has been established
flashes green
connection between optical line terminal and the
device has been established (the device is not
activated).
flashes red
no signal from optical line terminal
off
device is disconnected from the power source or
faulty
red
device startup failure
green
device startup completed, the current device
configuration differs from the default one
orange
device startup is completed, the default configuration
is set
2.6.2 NTU-RG-1421GС-Wac
LED indicators located on the front panel represent the current state of the device.
Possible states of the LEDs are listed in Table 9.
Table 9 –Light indication of the device
LED indicator
LED state
Device state
PON
off
device booting
green
connection between optical line terminal and the device
has been established
green flashes
authentication failed on the optical line terminal
red
no signal from optical line terminal
Status
off
static or bridge operation mode has been established for
WAN interface (PPP client is not started)
green
The device has been successfully authorized on the optical
line device (PPP session is started on WAN interface).
orange
The device has not been authorized (PPP session is not
started on WAN interface)
LAN P1/P2/P3/P4
green
10/100 Mbps connection has been established
orange
1000 Mbps connection has been established
flashes
packet data transmission is in progress
Wi-Fi 2.4/5
green
Wi-Fi is active
flashes
Wi-Fi data transfer

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16 NTU Optical Network Terminals
off
Wi-Fi is not active
Phone 0
green
phone is off-hook
flashes
port is not registered or authorization is not completed on
SIP server
flashes slowly
receiving call signal
TV
off
RF port is disabled
red
TV signal is not available
orange
signal level does not correspond to the normal (more than
+2 dBm)
Power
off
The device is disconnected from the power source or
faulty
green
The current device configuration differs from the default
one
orange
The default configuration is set
red
device booting
2.6.3 Indication of LAN Interfaces
Table 10 lists operation modes shown by LAN ports LEDs located on the rear panel of the device.
Table 10 –Light Indication of LAN Interfaces
Operation Modes
Yellow LED
Green LED
Port is in 1000Base-T mode, no data
transfer
solid on
solid on
The port is in the 1000Base-T mode,
data transfer
solid on
flashes
Port is in 10/100Base-TX mode, no data
transfer
off
solid on
The port is in the 10/100Base-TX mode,
data transfer
off
flashes
2.7 Reboot/Reset to factory defaults
For device reboot, press the Reset button once on the device side panel (“F” button on a rear panel for
NTU-RG-1421GC-Wac). In order to reset the device to factory settings, press the Reset button (“F”) and hold it
for 7-10 seconds until the POWER LED glows red. Factory settings for IP address are: LAN—192.168.1.1, subnet
mask—255.255.255.0. Access can be provided from LAN 1, LAN 2, LAN 3 and LAN 4 ports.
2.8 Delivery Package
NTU-RG standard delivery package includes:
–NTU-RG optical network terminal;
–220V/12V power adapter;
–operation manual.

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NTU Optical Network Terminals 17
3ARCHITECTURE OF DEVICES
3.1 NTU-RG architecture
Figure 8 –Logical Architecture of a Device with Factory Settings
Main Components of the Device:
–optical receiver/transmitter (SFF module) for conversion of an optical signal into electric one
–processor (PON chip) which converts Ethernet and GPON interfaces;and
–Wi-Fi modules for wireless interfaces of the device.
A device with factory (initial) settings have the following logical blocks (see Figure 8):
Br1;
Voice (IP telephony);
eth0…3;
FXS0;
wl0, wl0.1..wl0.3, wl1, wl1.1..wl1.3;
ppp0.1;
IPInterface.
The br1 block here is used to combine LAN ports into a single group.
The eth0..3 blocks physically represent Ethernet ports with RJ-45 connector for connection of PC, STB,
and other network devices. They are logically included into the br1 block.
The FXS0 block is a port with RJ-11 connectors for connection of analogue phone. It is logically included
into the Voice block. The Voice block can be controlled through web interface or remotely with ACS server via
TR-069 standard. The block specifies VoIP service parameters (SIP server address, phone number, VAS, etc.).
The wl0, wl0.1…wl1.3 blocks are the Wi-Fi module connection interfaces. wl0 blocks are the interfaces
designed for 2.4GHz band operation and wl1 blocks are designed for 5GHz band operation.
Filter and Marking blocks enable inclusion of local interfaces into a single group (to br1 block). They deal
with the traffic transmission rules, Filter blocks are responsible for the incoming traffic on the interface, Marking
blocks—for the outgoing one.

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18 NTU Optical Network Terminals
IPInterface block is a logical entity that the IP address is provided for the access in LAN and DHCP server
distributing addresses to clients.
The ppp0.1 block is WAN interface of the router. In the factory default configuration, this interface is a
default interface for such services as the Internet, VoIP, TR-069 device management and IPTV.
A connection to OB device (successful connection to an OLT) additionally creates the gpondef block with
the help of the OMCI protocol (ONT Management and Control Interface). This block enables connection of the
subscriber ONT device to the station one.

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NTU Optical Network Terminals 19
4CONFIGURATION OF NTU-RG-1421G-WAC, NTU-RG-1421G-WZ, NTU-RG-1431G-W AND
NTU-RG-1421GC-W VIA WEB INTERFACE. USER ACCESS
In order to configure the device it's necessary to connect to it in web browser (hypertext document
viewer), such as Firefox or Google Chrome. To do this, enter the device IP address in the browser address bar
(factory default IP: 192.168.1.1, subnet mask: 255.255.255.0).
After entering IP address, the device requests username and password.
Username: user, password: user.
In order to prevent unauthorised access to the device, the password is recommended to be changed (see
section 4.5.5.
Given below is a general view of the device configuration window. A navigation tree for object settings is
in the left pane, while the settings editor is to the right.

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20 NTU Optical Network Terminals
4.1 The “Device Info”menu
4.1.1 The “Summary”submenu
–Board type—device model;
–Serial number—device serial number;
–PON serial—device serial number in PON network;
–Base WAN MAC—MAC address of the device WAN;
–Board ID;
–Hardware Version—hardware version number;
–Software Version;
–Image 1 (Active) CRC—checksum of the 1st firmware image;
–Image 2 CRC—checksum of the 2nd firmware image;
–Bootloader (CFE) Version—bootloader version number;
–Wireless Driver Version—Wi-Fi adapter version number;
–System time—current time of the device;
–Uptime—time from the last device restart.
4.1.2 The “WAN”submenu. The Status of Services
4.1.2.1 The “General” submenu. General information
This tab displays general information about existing WAN interface configurations.