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EPON and GPON are popular versions of passive optical networks (PONs). EPON is Fast Ethernet (100 Mbps) PON, while GPON is Giga bits Ethernet (10 Gbps) PON. POWERLINK's  fiber optical access series of devices for the last-mile PON include OLT (Optical Line Terminal), ONU (Optical Network Unit) & ONT (Optical Network Termination), PON Splitters (PLC & FBT). We are proudly launching a series of integrated, high reliability and affordable EPON/GPON/ODN splitter solutions for all our customers to meet with fast growing demand of PON deployment.

ONU (Optical Network Unit) and ONT (Optical Network Termination) – ONU and ONT are basically the same device – ONT is located at the customer premise, and ONU is located outside the home.  ONU can be working in different temperature and weather conditions. It should resist water, winds and vandals. The ONU usually communicates with an optical network terminal (ONT), which may be a separate box that connects the PON to TV sets, telephones, computers, or a wireless router. The ONU/ONT may be one device.

OLT (Optical Line Terminal) is the endpoint hardware device located at the CO in a passive optical network (PON). The OLT contains a central processing unit (CPU), passive optical network cards, a gateway router (GWR) and voice gateway (VGW) uplink cards.  The main functionality of the OLT is to adapt the incoming traffic (Voice/Data/Video) from the metropolitan rings into the PON transport layer.  It can transmit a data signal to users at 1490nm. That signal can serve up to 128 ONTs at a range of up to 12.5 miles by using optical splitters.
Introduction

E121 is designed to meet the FTTH broadband access, fiber to the desk (FTTO). high reliability, easy management and excellent quality of service (QoS) guarantee

ONU products fully comply with IEEE 802.3-2005 and the China Telecom EPON device technical specification (V2.1). It is operative, manageable and maintainable at telecommunication level, and can provide high speed data service for customers. It has a PON uplink port that connects to office end apparatus through optical fiber.

Product Features

1. Conform to IEEE802.3ah standard
2. Support Ethernet service layer 2 switching and wire-speed forwarding of uplink and downlink services
3. Support frame filtering and suppression
4. Support standard 802.1Q Vlan function, support VLAN conversion
5. Support 4094 VLANs (802.1Q)
6. Support Dynamic Bandwidth Allocation (DBA) function
7. Support QoS, including traffic flow classification, priority marking, queue and dispatch, traffic shaping and traffic control, etc.
8. Single ONU supports up to 8 LLID
9. Support IGMP Snooping
10. Support Ethernet port ratelimit loop detection
11. Support power failure alarm

Port Features

1. 1 PON ports (1.25G)
2. 1 10/100/1000M port
3. Physical Features
4. Power supply: 12VDC
5. Power consumption: 6W
6. Temperature
7. Working temperature:0~55°C
8. Storage temperature: -30~60°C
9. Relative humidity: 10~90% (non-condensing)