ELTEX LTP-16N User manual


Optical line terminals
LTP-16N, LTP-16NT
User Manual, Issue 2 (28.05.2021)
Firmware version1.2.0

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Contents
1 Terms and Definitions .............................................................................................................6
2 General information.................................................................................................................7
2.1 Introduction ..............................................................................................................................7
2.2 Purpose ....................................................................................................................................7
2.3 Delivery Package......................................................................................................................7
2.4 Technical specifications..........................................................................................................8
2.5 Compatible SFP transceivers............................................................................................... 11
2.6 Design.................................................................................................................................... 12
2.6.1 Front panel ......................................................................................................................12
2.6.2 Rear panel........................................................................................................................14
2.6.3 LED Indication .................................................................................................................15
2.6.4 Temperature sensors .....................................................................................................16
2.6.5 Ventilation system ..........................................................................................................17
2.7 Safety rules and Installation procedure............................................................................... 17
2.7.1 Introduction .....................................................................................................................17
2.7.2 Safety requirements .......................................................................................................17
2.7.3 Terminal installation .......................................................................................................18
3 Getting Started with the terminal......................................................................................... 22
3.1 Connecting to the Terminal CLI ........................................................................................... 22
3.1.1 Introduction .....................................................................................................................22
3.1.2 Connecting to CLI via COM port.....................................................................................22
3.1.3 Connecting to CLI via Telnet protocol ...........................................................................23
3.1.4 Connecting to CLI via Secure Shell protocol.................................................................25
3.2 Getting Started with terminal CLI......................................................................................... 25
3.2.1 Introduction .....................................................................................................................25
3.2.2 CLI views hierarchy.........................................................................................................25
3.2.3 CLI hotkeys......................................................................................................................27
3.2.4 CLI automatic code completion.....................................................................................27
3.2.5 Group operations ............................................................................................................28
4 Configuring the terminal....................................................................................................... 29
4.1 Terminal configuration ......................................................................................................... 29
4.1.1 Introduction .....................................................................................................................29
4.1.2 Configuration lifecycle....................................................................................................29
4.1.3 Creating a configuration backup....................................................................................29
4.1.4 Configuration restore......................................................................................................30
4.1.5 Configuration reset .........................................................................................................30

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4.2 Network settings................................................................................................................... 30
4.2.1 Introduction .....................................................................................................................30
4.2.2 Network parameters configuration................................................................................30
4.3 User management ................................................................................................................ 32
4.3.1 Introduction .....................................................................................................................32
4.3.2 User list preview..............................................................................................................35
4.3.3 Adding a new user ..........................................................................................................36
4.3.4 Changing user password................................................................................................36
4.3.5 Viewing and changing user access rights.....................................................................36
4.3.6 Deleting a user ................................................................................................................37
4.4 Services configuration.......................................................................................................... 37
4.4.1 Introduction .....................................................................................................................37
4.4.2 SNMPD configuration.....................................................................................................37
4.4.3 LOGD configuration ........................................................................................................38
4.4.4 ALARMD configuration...................................................................................................42
4.5 VLAN Configuration.............................................................................................................. 44
4.5.1 Introduction .....................................................................................................................44
4.5.2 VLAN Configuration........................................................................................................45
4.5.3 VLAN Configuration........................................................................................................45
4.5.4 VLAN Deletion .................................................................................................................46
4.6 IGMP configuration.............................................................................................................. 46
4.6.1 Introduction .....................................................................................................................46
4.6.2 Enabling snooping ..........................................................................................................46
4.6.3 Report proxying...............................................................................................................46
4.7 DHCP Configuration.............................................................................................................. 47
4.7.1 Introduction .....................................................................................................................47
4.7.2 DHCP snooping...............................................................................................................47
4.7.3 DHCP option 82...............................................................................................................47
4.8 PPPoE configuration............................................................................................................. 50
4.8.1 Introduction .....................................................................................................................50
4.8.2 PPPoEsnooping .............................................................................................................50
4.8.3 PPPoEintermediate agent .............................................................................................50
4.9 Interface configuration ......................................................................................................... 52
4.9.1 Introduction .....................................................................................................................52
4.9.2 10G-front-ports configuration ........................................................................................53
4.9.3 GPON interface configuration........................................................................................54
4.10 LAG configuration................................................................................................................. 54

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4.10.1 Introduction .....................................................................................................................54
4.10.2 LAG configuration...........................................................................................................54
5 ONT configuration ................................................................................................................ 56
5.1 Service Models...................................................................................................................... 56
5.1.1 Introduction .....................................................................................................................56
5.1.2 VLAN ID replacement; The concept of pon vid .............................................................56
5.1.3 Operating principle..........................................................................................................56
5.1.4 ONT licensing..................................................................................................................58
5.1.5 Introduction .....................................................................................................................58
5.1.6 Loading a license file to OLT..........................................................................................59
5.1.7 Deleting a license file from OLT.....................................................................................59
5.2 ONT configuration ................................................................................................................ 60
5.2.1 Introduction .....................................................................................................................60
5.2.2 ONT operation modes ....................................................................................................60
5.2.3 General principles of configuration ...............................................................................60
5.2.4 ONT profiles configuration.............................................................................................61
6 Terminal monitoring ............................................................................................................. 68
6.1 General information.............................................................................................................. 68
6.1.1 Information on current terminal firmware version........................................................68
6.1.2 Terminal information preview ........................................................................................68
6.1.3 Network connection check.............................................................................................69
6.2 Terminal operation log ......................................................................................................... 70
6.3 Active alarms log .................................................................................................................. 70
6.4 10G-front-port monitoring .................................................................................................... 70
6.4.1 View port statistics .........................................................................................................70
6.4.2 View port state ................................................................................................................71
6.5 gpon-port monitoring............................................................................................................ 71
6.5.1 View port state ................................................................................................................71
6.6 MAC table monitoring........................................................................................................... 71
6.7 ONT monitoring..................................................................................................................... 72
6.7.1 ONT configurations list...................................................................................................72
6.7.2 List of empty ONT configurations..................................................................................72
6.7.3 View the list of unactivated ONTs .................................................................................73
6.7.4 List of connected ONTs..................................................................................................73
6.7.5 List of disconnected ONTs.............................................................................................75
6.7.6 ONT statistics .................................................................................................................75
6.8 System environment configuration ..................................................................................... 76

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7 Terminal maintenance.......................................................................................................... 77
7.1 SFP transceivers replacement ............................................................................................. 77
7.2 Ventilation units replacement .............................................................................................. 78
7.3 Power module replacement ................................................................................................. 78
7.4 OLT firmware update............................................................................................................ 79
8 The list of changes ............................................................................................................... 80

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1 Terms and Definitions
CBR      Constant bitrate
DBA     Dynamic bandwidth allocation
DHCP    Dynamic Host Configuration Protocol
ERPS     Ethernet Ring Protection Switching
FTP      File Transfer Protocol
FW      Firmware
GPON    Gigabit PON
HSI      High Speed Internet
IGMP    Internet Group Management Protocol
IP       Internet protocol
MLD     Multicast Listener Discovery
OLT     Optical Line Terminal
ONT    Optical Network Terminal
ONU    Optical Network Unit
PCB     Printed Circuit Board
PPPOE   Point-to-point protocol over Ethernet
SLA      Service Level Agreement
SNTP    Simple Network time protocol
SNMP    Simple Network Management Protocol
SFP      Small Form-factor Pluggable
TFTP     Trivial File Transfer Protocol
URI      Uniform Resource Identifier
VEIPVirtual Ethernet Interface Point
Notes and warnings
Notes contain important information, tips or recommendations on device operation and configuration.

Warnings are used to inform the user about harmful situations for the device and the user alike, which
could cause malfunction or data loss.
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2 General information
2.1 Introduction
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 downstream rate up to 2.5Gbps and upstream rate up to 1.25Gbps. 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.
The range of OLT GPON equipment produced by Eltex comprises of LTP-16N and LTP-16NT terminals with
internal Ethernet switch with RSSI function and 16GPON ports.
This user manual describes purpose, main technical specifications, installation order, rules of configuration,
monitoring, and software update for the devices.
2.2 Purpose
The LTP-16N(T) optical line terminal is designed to establish connection with upstream equipment and provide
broadband access across passive optical networks. Ethernet connection is established through Gigabit uplink
and 10G Base-X interfaces; GPON interfaces are used to connect to optical networks.Each PON interface
allows connection of up to 128subscriber optical terminals through one fibre and supports dynamic
bandwidth allocation (DBA).
The following services are provided to end users:
voice communications;
HDTV;
VoIP;
high-speed access to the Internet;
IPTV;
video-on-demand (VoD);
video conferencing;
online educational and entertainment programs.
The device supports the following functions:
dynamic bandwidth allocation (DBA);
security functions;
remote ONT management;
power measurement support for signals received from each ONT (RSSI);
VLAN organisation (VLAN ID range: 1–4094);
support for IGMP snooping v1/2/3, IGMP proxy;
support for PPPoEintermediate agent;
support for DHCP Snooping, DHCP option 82.
2.3 Delivery Package
The standard delivery package includes:
LTP-16N/16NT optical line terminal;
Mounting set for 19'' rack.
RJ-45 – DB9(F) console cable;
CD with Operation Manual and Quick Configuration Guide (optional);

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Power cable (if equipped with 220V power supply);
Informational leaflet;
Declaration of conformity;
Technical passport.
2.4 Technical specifications
Table 1 – Main specifications of the line terminal
Interfaces
Number of Ethernet interfaces LTP-16N/LTP-16NT 9
Connector RJ-45 - 1 SFP - 8
Data rate, Mbps 10/100/1000
duplex/half-duplex
1000/10000
duplex
Standards 1GBase-X 10GBase-X
Standards IEEE 802.1D, IEEE 802.1p, IEEE 802.1Q
Number of PON interfaces LTP-16N/LTP-16NT 16
Connector type SC/UPC (socket)
in accordance with ITU-T G.984.2, FSAN Class B+, FSAN Class C++,
SFF-8472
Transmission medium SMF – 9/125, G.652 fibre optical cable
Standards Digital RSSI (Received Signal Strenght Indication)
Splitting ratio 1:4, 1:8, 1:16, 1:32, 1:64, 1:128
Class B+ Class C++
Range of coverage 20 km 40 km
Transmitter 1490 nm DFB Laser 1490 nm DFB Laser
Data rate 2488 Mbps 2488 Mbps

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Average output power +1,5..+5 dBm +7..+10 dBm
Spectral line width with -20dB 1.0 nm 1.0 nm
Receiver: 1310 nm APD/TIA 1310 nm APD/TIA
Data rate 1244 Mbps 1244 Mbps
Receiver sensitivity -28 dBm -32 dBm
Receiver optical congestion -8 dBm -12 dBm
Synchronization ports Only for LTP-16NT
Processor
Processor type Intel Atom, x86_64
Clock frequency 2.1 GHz
Core quantity 4
RAM LTP-16N/LTP-16NT 8 GB
Non-volatile memory LTP-16N/LTP-16NT 8 GB
Switch
Ethernet switch Broadcom Packet Processor
Switch performance 120 Gbps
MAC table 64K entries
VLAN support up to 4K in accordance with 802.1Q

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Control
Local control CLI – command line interface
Remote management CLI (SSH, Telnet), SNMP
Monitoring CLI, SNMP
Access restriction by password, by privelege level
General parameters
Power supply AC: 150..250V, 50 Hz
DC: -36..-72V
Maximum power consumption LTP-16N/LTP-16NT 75 W
Operating temperature range from -5 to +40°C
Relative humidity Up to 80%
Dimensions (WxHxD) 19", 1U
Dimensions with an installed power module:
430x42x305 mm
Weight Complete set
LTP-16N/LTP-16NT 3.5 kg
Modules
Power module 0.5 kg