Comparison of FTTO Access Technology Features

FTTO access technology mainly has three technical standards: Active Optical Network (AON) technology, Ethernet-based Passive Optical Network (EPON) technology, and Generic Framing Protocol-based Passive Optical Network (GPON) technology. Comparison of the features of the three [FTTO](

Comparison Item		AON	EPON	GPON
Standard Developer		IEEE	IEEE	ITU
Compatibility with Existing Technologies		Very Good	Good	Poor
Bandwidth Support		Dedicated 100M	Shared 622M or 1G by 16 users	Shared 1G or 2G by 16 users
Technology Maturity		Very Mature	Immature	Immature
Ease of Construction, Operation and Maintenance		Easy, Low Cost	Not Easy	Not Easy
Service Support	Internet Broadband Access	Supported	Supported	Supported
	CATV Access	Supported	Supported	Supported
	Telephone Access	V5 Signaling/VOIP	Supported	Supported
Domestic Market Development Prospects		Good	Uncertain	Uncertain
Cost		Very Low	High	Very High

    From the perspective of current commercial office building construction, office buildings are generally equipped with telecommunication rooms for installing communication access equipment and line termination for the entire building. This configuration is required for telecom operators to compete and to provide integrated access to multiple telecom services. The distance from the equipment room to users is generally less than 1km; major telecom operators have already laid small-core-count (typically 4 to 12 cores) fiber optic cables to the equipment rooms of commercial buildings. Therefore, the passive network advantages of PON cannot be fully utilized or demonstrated in commercial office buildings in China.