Hello, everyone!
I'd like to share this with you.
The GPON technology operation is described in the ITU-T G.984.x standards series, in which the PON system's general characteristics are exposed, such as its architecture, bit rate, physical and logical reach, signal delay, optical division ratio, protection, security, and others. GPON allows the flexible fiber-optic access network implementation capable of supporting broadband service requirements through FTTx.
The G.984.1 standard emerged in order to establish new demands on the network, including:
Support for voice, Ethernet, and ATM services.
The maximum physical reach is 20 km, although it can go up to a maximum logical reach of 60 km.
It includes speeds of 2.4 Gbps on the downlink, from the OLT to ONU, and 1.2 Gbps on the uplink, from the ONU to OLT. It also supports 2.4 Gbps, symmetrically.
The maximum user number that can serve through the same fiber is 64, although the system is prepared to support up to 128.
The figure shows a GPON network made up of OLT, ONT / ONU, and ODN with a P2MP topology in which passive optical splitters are located. For voice and data transmission, it uses the wavelength range of 1480-1500 nm downstream and the range of 1260-1360 nm upstream. It also enables the video distribution service in the 1550-1560 nm band. The wavelengths used downstream (1490 nm) and upstream (1310 nm) on a single fiber, are shared through time-division multiplexing (TDM) among all users. The transmission rate per user is the maximum transfer rate divided by the number of users connected to the PON port of the OLT line card.
GPON enables telecommunication services convergence on a single network infrastructure, which favors the cost reduction for operators by not having to install and maintain parallel networks for each service.
Thank you!
