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GPON ONT STANDAR
1.Summary
The ONT is an Optical Terminal Equipment unit for Passive Optical Networks (PON) termination in a (Fiber-To-The-Home) FTTH / (Fiber-To-The-Cell)
FTTC service delivery architecture. ONT communicates with the OLT (Optical Line Terminal) for the PON side and with the customer’s premises for
the client side. This equipment supports triple-play services - high speed internet (HSI), voice (VoIP) and video (IPTV and/or RF Overlay) as like as
implementing the mobile backhaul service in the access component in the FTTC architecture. The use of the GPON fiber access technology stan-
dard architecture does allow a significant service delivery increase when compared with traditional xDSL technology.
The ONT equipment technology is based on GEM (GPON Encapsulation Method), and complies with ITU-T G.984.x. recommendation as like as
G.984.4 (OMCI) ensuring interoperability with major GPON OLT vendors.
These base functionalities, together with the support for bit rates of up to 2.5 Gbps (downstream) and 1.24 Gbps (upstream), a splitting ratio of up
to 1:64 in a single fiber and a distance range of up to 60 km, make the GPON technology and the ONT the most efficient option for passive optical
network topologies.
Together with multi-vendor OLT interoperabily (BBF.247 certified), other differenciated features of the ONT product family are the embeeded RF
Video Overlay as well as the chance to have several TV channel packs by means of using remote managed analog RF video overlay filters. The use
of an embeeded optical reflective component also increases probing resolution in case of FTTH probing.
As opposed to the point-to-point architecture, in which there is one physical port per client in the Central Office, in this GPON point-to-multipoint
architecture there is one single laser and photo-detector in the Central Office (CO) to serve up to 64 CPEs. All the Optical Distribution Network is
built by means of passive equipment modules with a long MTBF value and very low OPEX costs. This leads to a significant cost reduction in this
kinf of networks rollout.