ONU converts optical signals transmitted via fiber to electrical signals. These electrical signals are then sent to individual subscribers. In general, there is a distance or other access network between ONU and end user’s premises. Furthermore, ONU can send, aggregate and groom different types of data coming from customer and send it upstream to the OLT. Grooming is the process that optimises and reorganises the data stream so it would be delivered more efficient. OLT supports bandwidth allocation that allows to make smooth delivery of data float to the OLT, that usually arrives in bursts from customer. ONU could be connected by various methods and cable types, like twisted-pair copper wire, coaxial cable, optical fiber or Wi-Fi.
Actually, ONT is the same as ONU in essence. ONT is an ITU-T term, whereas ONU is an IEEE term. They both refer to the user side equipment in GEPON system. But in practice, there is a little difference between ONT and ONU according to their location. ONT is generally on customer premises.
- It offers fully integrated triple play solution to deliver TV, Internet and phone services at same platform.
- Multiple services on one platform, no expensive over-build in last mile network
- Point-to-multipoint topology with splitter without field power requirement
- Offer a real future-proof access network with flexiblilty and upgrade capability
- Passive splitters to eliminate outside plant and field power requirements, to lower CAPEX and OPEX (no energy needed for splitter)
- Supports features like legacy DDN and voice, QoS and SLA give carriers the ability to create profit-generating applications and customized service offerings
- Easy management, easy accounting and easy upgrade with flexibility and scalability
- Multicast support for IPTV video streaming
- Split ratio up to 1:32 and 1:64 reaching up to 20 km
- L2/L3 routing features
- Managed by logical and easy GUI manager and SNMP
SPECIFICATIONS
System Capacity
Provide 2 ports – 1 10/100/100 Gigabit and 1 10/100 Fast Ethernet
Link budget: >29dB
PON Interface
1Gbps transmission rate
Network reach: 30 km
Receiver sensitivity: <=-26dBm
Security: ONU authentication
Standards
IEEE 802.3ah
MII GEPON standards
IEEE 802.1p 802.1Q 802.1d 802.1w
IEEE 802.3ad
Power
120 ~240V AC，broaden compliant
Power consumption: Max 10W
Ethernet Service
MAC learning and banding
DBA
Qualities of Service
Rate control
ACL RSTP
Broadcast limit
Encryption
Layer 2 isolation
IGMP multicast
Power :120~240V AC, broaden compliant
