G.Fast is a new ITU standard that provides gigabit speeds over existing copper telephone lines shorter than 500 meters, a major improvement over existing VDSL technology. It uses frequencies between 2-212 MHz to achieve speeds up to 2 Gbps, using Time Division Duplexing and vectoring to minimize crosstalk interference. Many major network equipment and semiconductor companies are supporting G.Fast's development and production. Initial deployments are expected to focus on multi-dwelling units using fiber to the distribution point and G.Fast for the last few hundred meters of copper to customer premises. While promising high speeds, real-world performance will depend on the quality and type of existing copper wiring used.

1. G.Fast
1Gbps over Copper Cable
“Are we ready ?”
By
Rommy Kuntoro

2. What is G.Fast ?
• Ultra high data rates
• Bandwidth: 2-106Mhz - Up to 1Gbps in Amd 1/ 2 on a single pair, double with bonding
• Bandwidth: 2-212Mhz - Up to 2Gbps in Amd 3 on a single pair, double with bonding
• Using Time Division Duplexing ( TDD ) Technology (not FDD like VDSL)
• Provide ratio control Downstream/Upstream bandwidth ( 90/10, 80/20 , 50/50, 70/30 )
• Dynamic Time Slot Allocation (dynamic upstream/downstream) ratio for future
• Vectoring is part of the standard
• Robust operation – self install friendly
• Fast OLR ( online reconfiguration)
• Ability to quickly track changes on the line (precoder updates)
• Short retrain time
• Low power consumption
• Discontinuous operation
• DRA ( Dynamic Resource Allocation )
G.Fast is ITU Standard
(G.9700/G.9701) for
local loops shorter than
500m

3. The industry is gathering behind G.fast
Nokia
(ALU)
Huawei
ZTEAdtran
Calix
HFR Dasan
(Zhone)
Altice
Labs
Zinwell Zyxel
Gemtek
Pegatron
TP-Link
T&W
& many others
Sckipio
BRCM
Intel
(Lantiq)
Metanoia
Triductor
Realtek
(Cortina)
Hi-Silicon
Silicon
Equipment
Sagem
Technicolor
QCA
(Ikanos)
Impressive number of silicon vendors
are heavily invested in G.fast

4. BT Presentation at G.fast Summit in May

5. DSL Spectrum Chart
0 1.1 2.2 8.8
Mhz
12
Mhz
17
Mhz
30
Mhz
106
Mhz
212
Mhz
ADSL
ADSL 2+
VDSL 8a
VDSL 12
VDSL 17
VDSL 30
G.Fast
G.Fast amendment 3 (due this fall)

6. How VDSL 2+ Coexistence with G.Fast ?
2.2 8.8
Mhz
12
Mhz
17
Mhz
30
Mhz
106
Mhz
VDSL 2+
G.Fast
20
Mhz

7. G.Fast Implementation
.
.
.
16
Metro E OLT
DPU/MDU
CPE
PON
< 2 Km
Copper
< 500 m
FTTdp = Fiber To The distribution point

8. G.Fast Challenge
Copper CABLE with many kind type and twisted
Current Best Practices is
CAT 5e Cable with Max 350 - 500 Meters

9. G.Fast Devices in My Lab
RJ 21G.Fast MDU G.Fast CPE

10. The End
Rommy Kuntoro
rommy.kuntoro@cbn.co.id