Networks, Technologies and Infrastructures for Transport, Access and Home

Recommendation ITU-T G.998.4 specifies techniques beyond those defined in the existing ITU-T digital subscriber line (DSL) Recommendations ITU-T G.992.3, ITU-T G.992.5, and ITU-T G.993.2 to provide enhanced protection against impulse noise or to increase the efficiency of providing impulse noise protection (INP).

This recommendation specifies functional definitions of components and networks to provide energy management services in home. It also specifies home network configurations and requirements for these services.

This Recommendation includes the specifications of gigabit PON transmission convergence (GTC) layer framing, upstream time division multiple access mechanism, physical layer OAM messaging channel, principles and signalling mechanism of the upstream dynamic bandwidth assignment, ONU activation method, forward error correction and security.

This Recommendation describes flexible access networks using optical fibre technology based on ITU-T Rec. G.983.1. Specifically, it describes the functions that extend ITU-T Rec. G.983.1 to enable survivability-protection enhancements for the delivery of highly reliable services. It describes B-PON survivability architectures, protection performance criteria, and protection-switching criteria and protocols.

Recommendation ITU-T G.798 specifies both the components and the methodology that should be used in order to specify optical transport network functionality of network elements.

This Recommendation specifies both the components and the methodology that should be used in order to specify synchronous digital hierarchy (SDH) functionality of network elements.