OLT Product’s GEPON/GPON Integrated Capability

  With a more intelligent and more cost-effective product design solution, FOT OLT supports mixed access to EPON and GPON services. As a result, the bandwidth restrictions (from access network) has been removed, which make PON OLT series easily meet user requirements for high-bandwidth services.

EPON access capability

  • Supports all the EPON functions defined in IEEE 802.3-2008 standard.
  • Supports extended OAM function.
  • Supports various kinds of ONUs, such as SFU, cassette MDU (including LAN type and xDSL type), shelf-based MDU and HGU ONU.
    Provides EPON transmission with large bandwidth capacity:
    Downlink rate: 1.25 Gbit/s and 2.5 Gbit/s
    Uplink rate: 1.25 Gbit/s
  • Supports DBA (Dynamic Bandwidth Allocation) algorithm:
    • The minimum configurable bandwidth of DBA is no more than 256 Kbit/s.
    • The bandwidth allocation granularity of the SBA and DBA is in steps of 64 Kbit/s.
    • The accuracy of the DBA is better than ±5%.
  • Supports long-distance transmission. The long-distance coverage problem of twisted pair cable access technology is solved. The maximum transmission distance (PON+ twisted pair cable) can be more than 20 km.
  • Provides a high split ratio of 1:64 by using PON technology, so as to improve capacity, conserve fiber consumption, and facilitate network reach.
  • 10G EPON access capability

    • Supports the 10G EPON functions defined in IEEE 802.3av standard.
    • Supports various kinds of ONUs, such as SFU, cassette MDU (including LAN type and xDSL type), shelf-based MDU and HGU ONU.
    • Provides transmission with large bandwidth capacity:
      Uplink rate: 10 Gbit/s and 1.25 Gbit/s
      Downlink rate: 10 Gbit/s
    • Supports the DBA algorithm for uplink bandwidth allocation, and supports three bandwidth types: the fixed bandwidth, assured bandwidth, and best effort bandwidth.
    • Provides a high split ratio of 1:64, and can reach 1:128 if optical power permits, which improves capacity, conserves fiber consumption, and facilitates network reach.
    • Supports transmission distance up to 20km for the split ratio of 1:64, and longer distance for a lower split ratio.

    GPON access capability

    • Conforms to ITU-T G.984 serial standards, with good interoperability.
    • Supports extended OAM function.
    • Supports various kinds of ONUs, such as SFU, SBU, cassette MDU (including LAN type and xDSL type), shelf-based MDU and HGU ONU.
    • Provides GPON transmission with large bandwidth capacity:
      Downlink rate: 2.5 Gbit/s
      Uplink rate: 1.25 Gbit/s
    • Supports both SBA (Static Bandwidth Allocation) and DBA algorithms:
      • SBA ensures a fixed bandwidth for each ONU.
      • DBA allocates bandwidth according to subscriber’s traffic dynamically.
      • The minimum configurable bandwidth of the DBA is 256 Kbit/s.
      • The bandwidth allocation granularity of the SBA and DBA is in steps of 64Kbit/s;
      • The accuracy of the DBA is better than ±5%.
    • Supports long-distance transmission.
      • By using PON technology, the long-distance coverage problem of twisted pair cable access technology is solved.
      • Supports uplink and downlink FEC (Forward Error Correction) to extend the transmission distance.
      • The maximum transmission distance (PON+ twisted pair cable) can be more than 20 km.
  • Provides a high split ratio of 1:64, and can reach 1:128 if optical power permits, which improves capacity, conserves fiber consumption, and facilitates network reach.
  • Supports data transmission in an efficient way.
    • Encapsulates all the data to be transmitted into 125us frames (fixed length frames) via the new encapsulation protocol. In this way, a smaller number of transmission overhead bytes are used, and the transmission efficiency is enhanced.
    • The transmission efficiency can reach up to 93% when the downlink rate is 2.5Gbit/s and the uplink rate is 1.25Gbit/s.

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