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  4. > The G.fast: an assessment of the value proposition for operators

G.fast is nearing commercial deployments and operators need to consider the benefits the technology can deliver compared with rolling out alternative technologies. This report considers whether deploying G.fast is a sound choice for operators.

Table Of Contents

The G.fast: an assessment of the value proposition for operators
Table of contents
About this report
Executive summary
Recommendations
Introduction: The number of alternatives to G.fast is increasing
G.fast rates will exceed ITU targets, but actual speeds will depend on factors such as notching of frequencies used for VDSL2
Notching for radio and the presence of bridge taps will reduce G.fast bit rates significantly
Operators could deploy frequency division vectoring or 30MHz vectoring before rolling out G.fast
Intermediate technology options for deployments between VDSL2 vectoring and G.fast have different advantages
G.fast lacks the ability to provide symmetrical gigabit access, but this will be possible over very short copper loops in the long term
G.fast has lower costs per home connected than the other technologies
Roll-out costs will be impacted by how much closer to the home operators need to bring fibre
G.now offers lower active equipment costs at the node than G.fast
Node size impacts active equipment costs and the business case for G.fast
Technology timelines: Operators have a window of opportunity for deploying G.fast
Technology coexistence issues between G.fast and VDSL2: Vendor and operator strategies may be guided by copper decommissioning
Copper decommissioning when deploying G.fast also raises challenges of reverse powering and regulation
Any XG-FAST deployment will raise surmountable challenges with regard to coexistence with G.fast
Coexistence between reverse powering and POTS telephony complicates the business case for G.fast and fibre beyond the cabinet
POTS coexistence issues: Additional equipment will be required in fibre- beyond-the-cabinet scenarios, even for a single socket
POTS coexistence issues: Further complications arise if there is more than one telephone device and socket
Reverse powering entails some challenges for management of DPUs
About the author
About Analysys Mason

List of figures

Figure 1: Summary of report coverage
Figure 2: Operator next-generation access technology options: copper-based technologies and FTTH
Figure 3: Net data rate expectations on 0.6mm cable, by technology and loop length
Figure 4: Estimated sub-loop length distribution, selected operators
Figure 5: Advantages and disadvantages of frequency division vectoring and 30MHz vectoring
Figure 6: Aggregate bit rate for selected technologies at different loop lengths
Figure 7: Baseline assumptions on cost per home connected, by technology, a developed market, 2014
Figure 8: Selected fixed broadband technologies by requirement to bring fibre closer to the home
Figure 9: Baseline assumptions on fibre roll-out cost per premises passed by technology, a developed market, 2014
Figure 10: Baseline assumptions on the cost of active equipment at node per home passed, by technology, 2014
Figure 11: Timeline of expected commercial availability for selected copper-based next-generation access technologies
Figure 12: G.fast and VDSL2 coexistence scenarios
Figure 13: G.fast and XG-FAST coexistence issues
Figure 14: Coexistence issues with reverse powering and POTS telephony
Figure 15: Reverse power feeding and POTS coexistence with multiple devices and no master socket
Figure 16: Persistent management agent architecture for G.fast

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