This WT provides cable models which can be used in Broadband Forum Working Texts/Technical Reports for interoperability and performance testing of the transmission technologies such as ITU-T G.9701 (G.fast). These cable models provides the transfer functions of both direct path and crosstalk paths of the Loop End Access Network and addresses both the attenuation and phase of these transfer functions.

Amendment 1 adds additional cable models.

Through the use of G.fast and VDSL2 over short copper loops, it has become possible to provide broadband users with data rates approaching those of fiber access technologies. This capability allows service providers to provide ultra high-speed broadband service without the need to deploy fiber into the customer premises. Since the targeted copper loop lengths are typically less than 400 meters (250 meters with Reverse Power Feed), a node type that supports very deep deployment in the access network is required. This Working Text defines this node type by detailing its position(s) in the network and functional requirements. In addition, the functional requirements for reverse power feeding of this node type and its management architecture are specified.

DTP-337i2a1

DTP-337i3

This document is intended to provide a certification test plan for ITU‑T Recommendation G.9700 “Fast access to subscriber terminals (G.fast) – Power spectral density specification” and G.9701 “Fast access to subscriber terminals (G.fast) – Physical layer specification”. This IR-337 is specifically conceived for the basic interoperability objectives of the Broadband Forum G.fast Certification Program.

Technical content in this test plan includes test setup information, equipment configuration requirements, test procedures, and pass/fail requirements for each test case.

With short copper loops required by G.fast Distribution Point Units (DPUs) that push the deployment of the DPU/MDUs closer to the customer premise, local power and forward power may not be viable to cost or location. To power the DPU, power will come from the customer premises location over the copper pair; this is referred to as Reverse Power Feed (RPF).

This document specifies tests for the RPF functions of a DPU and the customer premises’ Power Supply Equipment (PSE) either as a stand-alone device or as a function integrated in a G.fast Network Termination.

Test cases are mainly specified with reference to ETSI TS 101 548 and BBF WT-301 requirements. Furthermore they are designed to ensure safe deployment of RPF equipment.

This document applies only to the operational aspects of the certification program, such as:

1. What information, equipment, and support is required by companies submitting products for certification.
2. Features, test modes, and interfaces required on/for devices being submitted for certification testing.
3. How companies may certify similar equipment, such as derivative works or models with a subset of features.
4. How companies with certified products may use the certification logo and other documentation about the certification program.

This document provides a performance test plan for ITU‑T Recommendation  G.9701 “Fast access to subscriber terminals (G.fast) – Physical layer specification”. Since network architectures and deployment practices vary greatly among service providers, the network conditions (loop models, noise models, loop lengths, etc.) were selected to represent nominal conditions under which (interoperability) performance is tested.  This test plan is focused on ensuring laboratory repeatability such that equipment from different vendors can be validated and compared.