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Designer and manufacturer of communication equipment
Russia (GMT +7)

OLT LTP-4X rev.C/rev.D

Mass production

Key features

  • 4хPON ports, 1U case
  • Hot-swappable redundant power units
  • Remote management via CLI, SNMP
  • Compliance with G.988, G.984.x and TR-156 standards
  • Ability to provide cable TV together with data transmission
  • Optimal solution for a small village or an apartment building
Optical Line Terminal (OLT) is designed to provide broadband access over Passive Optical Network (PON). 

GPON interfaces are used to connect the passive optical network (PON). Up to 128 subscriber optical terminals can be connected to each interface via a single fiber. The access to the operator transport network is provided via 10 Gigabit or combined Gigabit uplink interfaces.

OLT LTP allows operators building scalable, last mile fault tolerant networks to ensure the highest safety standards. OLT manages subscriber devices, traffic switching and connection to the transport network. 

Broadband subscriber access using FTTH technology is the highest quality version of the Triple Play service delivery, as it provides high data rates over long distances.
The main advantage of PON technology is the lack of electrically powered active nodes within the section from OLT to ONT, which greatly reduces the network operating cost. Furthermore, PON technology saves on cabling infrastructure by reducing the total length of the optical fiber, as only one fiber for a group of up to 128 subscribers is used within the section from the central node to the splitter. 

OLT LTP rev.C/rev.D support two hot-swappable power modules with the ability of automatic transfer to a redundant module.

Modules and additional devices
Documents and files
  • Uplink
    • 2 ports of 10GBASE-X (SFP+)/1000BASE-Х
    • 4 Combo ports of 10/100/1000BASE-T/ 1000BASE-X (SFP)
  • Downlink
    • 4 ports of 2.5/1.25 Gbps GPON (SFP)
Port modes
  • Duplex/half-duplex mode 10/100/1000 Mbps mode for electric ports
  • Duplex 1/10 Gbps mode for optic ports
SFP PON parameters1
  • Medium -  single-mode optical fiber -  9/125, G.652
  • Splitting ratio - up to 1:128
  • Support for RSSI (Received Signal Strenght Indication)
  • Support for DDM (parameters output in CLI):
    • Digital RSSI
    • Module Temperature 
    • Supply Voltage
    • Laser Bias Current 
    • Tx Optical Power Output 
Class B+
  • Compliance with ITU-T G.984.2, FSAN Class B+, SFF-8472 standards
  • Maximum link distance: 20 km
  • Transmitter: 1490 nm DFB Laser
    • Data rate: 2488 Mbps
    • Average launch power:  +1,5..+5 dBm
    • Spectral linewidth: -20 dB 1.0 nm
  • Receiver: 1310 nm APD/TIA
    • Data rate: 1244 Mbps
    • Receiver sensitivity: -28 dBm
    • Receiver optical overload: -8 dBm
Class C++
  • Compliance with  ITU-T G.984.2, FSAN Class C++, SFF-8472 standards
  • Maximum destination: 40 km
  • Transmitter: 1490 nm DFB Laser
    • Data rate: 2488 Mbps
    • Average output power: +7..+10 dBm
    • Spectral linewidth: -20 dB 1.0 nm
  • Receiver: 1310 nm APD/TIA
    • Data rate: 1244 Mbps
    • Receiver sensitivity: -32 dBm 
    • Receiver optical overload: -12 dBm
    • Burst-mode receiver dynamic range: 20 dB
  • Bandwidth - 128 Gbps 
  • MAC table- 16К entries
  • Support for up to 4К VLANs in compliance with 802.1Q
  • Quality of Service (QoS)
Physical parameters
  • Power supply1:
    • 150–250 V AC, 50–60 Hz
    • 36–72 V DC
  • Power consumption: no more than 55 W
  • Operating temperature: from -5 to +40 °C
  • Operating humidity: 80%
  • Dimensions (W × H × D): with installed power module 430 × 44 × 317 mm, 19'', 1U case
  • ITU-T G.988 GPON
  • ITU-T G.984x GPON
  • ITU-T G.8032/Y.1344 Ethernet nng protection switching
  • IEEE 802.3i 10BASE-T Ethernet
  • IEEE 802.3u 100BASE-T Fast Ethernet
  • IEEE 802.3ab 1000BASE-T Gigabit Ethernet
  • IEEE 802.3z Fiber Gigabit Ethernet
  • ANSI/IEEE 802.3 NWay auto-negotiation
  • IEEE 802.3x Full Duplex and flow control
  • IEEE 802.3ad Link aggregation
  • IEEE 802.1p Protocol for Traffic Prioritization
  • IEEE 802.1Q Virtual LANs
  • IEEE 802.1ad Provider Bridges (QinQ)
  • IEEE 802.1v VLAN Classification by Protocol and Port
  • IEEE 802.3ac VLAN tagging
  • IEEE 802.1d MAC bridges
  • IEEE 802.1w Rapid Reconfiguration of Spanning Tree
  • IEEE 802.1s Multiple Spanning Trees
Additional features
  • Port mirroring, VLAN mirroring
  • MAC table: 16K per switch, 4K per port
  • MAC address limiting
  • Support for STP, RSTP, MSTP
  • Support for ERPSv3
  • Support for QoS: 802.1p, DSCP, WRR
  • Port isolation, port isolation within a VLAN
  • Unicast/multicast/broadcast traffic restrictions
  • Support for ACL IPv4
  • Support for QinQ with compliance to IEEE 802.1ad
  • Up to 1024 multicast groups
  • IGMP/MLD Fast Leave
  • IGMP/MLD Proxy
  • IGMP/MLD Snooping
  • IGMP/MLD Querier
  • DHCPv4 Snooping
  • IP Source guard
  • DHCPv4/DHCPv6 Relay Agent (opt.82, ip-helper)
  • PPPoE Intermediate agent
  • LLDP (802.1ab)
  • Storm Control
  • Policy
  • Utilization by ONT services
  • GPON port redundancy
  • PoE management on ONT ports
Management and monitoring
  • Support for RADIUS, TACACS+
  • Management and monitoring via CLI, SNMP
  • Access restriction: by password, by IP address, by priveledge level
  • Support for several management interfaces
Centralized management system  

The centralized management system Eltex.EMS for ELTEX equipment provides the following features: 
  • searching, adding, configuring, state monitoring of OLT/ONT and other network elements
  • monitoring of main parameters and power supply
  • monitoring of physical and logical interfaces statistics
  • subscriber ports management: configurations, profiles
  • management of mass automatic firmware update system for subscriver PON devices
  • online dynamic graph drawing of various static parameters
  • graphic displaying of physical ports state
  • launch of main configuration tools: SSH, Telnet
  • centralized collecting, storing and processing the operation, event and alarm logs
  • collecting and storing alarm messages
  • quick search system for subscriber devices
  • information on number of active subscribers in a PON network
  • state monitoring and statistics by Internet, VoIP, IPTV and CaTV services
  • statistics of PON subscribers activity
  • entralized collection of device messages via Syslog
  • logging all users actions in the system

1The parameter is defined when ordering




OLT LTP-4X, 4 ports of SFP-xPON, 4 combo ports of 10/100/1000Base-T/1000Base-X, 2 ports of 10GBase-X SFP+, embedded L2+ switch, RSSI

Additional modules (doesn't included in basic package)


PM160-220/12 power module, 220V AC, 160W


PM100-48/12 power module, 48V DC, 100W

Related software


EMS-OLT option of Eltex.EMS system for management and monitoring of Eltex network elements: 1 OLT

Operational lifetime of the ELTEX equipment
In development
Mass production
Mass production is over
Sold out
Support is over
Regardless of the operational lifetime stage, Eltex provides a 12 months warranty on all its telecommunication equipment.
During the warranty period the manufacturer ensures technical support and free-of-charge repair at the Enterprise which is situated in Novosibirsk.
As part of the warranty service, technical support is provided on the first-in first-out principle.
The priority support packages of 8/5 and 27/7 types are subjects to additional charges.

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