A technical comparison between VDSL VPLUS and G.fast.

1. Jul 16, 2015Confidential | SckipioSckipio
Technology Comparison
VPLUS versus G.FAST

2. Jul 16, 2015Sckipio | G.fast vs VPLUS Comparison2
VPLUS (35b) vs. G.fast Comparison
Parameter G.FAST VPLUS (35b)
Bandwidth 2-106MHz, 2-212MHz (future) 2-35Mhz
Max Rate Up to 1Gbps with path to even faster
future G.fast performance
Up to 400Mbps for 0m loops, no path
to higher speeds
Down/Up ratio Configurable: 90:10 to 30:70 Fixed ratio
Complexity 2K Carriers (more efficient) 8K Carriers (results in 4x more
memory required for vectoring)
Vectoring Designed to cope with the high FEXT
level in the G.fast band
Designed for the low 17MHz VDSL
frequencies. Significant performance
loss when FEXT is high.
Customer Self
Install
Likely – the huge rates leave margin
for handling tough in-home networks
Unlikely – performance may drop
under 17a rates
Openness 7 silicon vendors participate in the
G.fast interop event (Plugfest)
Single vendor?
No BBF certification plan
* Sckipio implementation

3. Jul 16, 2015Sckipio | G.fast vs VPLUS Comparison3
G.fast vs. VPLUS 35b, downstream
• Huge advantage for G.fast for short lines. Similar performance if the target rate is limited to 300Mbps. Advantage to
VDSL+ if the min rate target is 200Mbps (100m). No advantage for VDSL+ if G.fast can start from 2MHz.
0 100 200 300 400 500 600
0
100
200
300
400
500
600
700
800
900
1000
Loop length [m]
Bit-Rate[Mbps]
Downstream Rate/Reach
G.fast, 20-106
VDSL 35b
VDSL 17a
G.fast, 2-106
300Mbps target
200Mbps targetC
A
B

4. Jul 16, 2015Sckipio | G.fast vs VPLUS Comparison4
THINGS TO CONSIDER
• Cost implications of multiple choices versus monopoly
– VPLUS is a single vendor solution. G.fast has 6 suppliers committed to deliver chips
– Users will incur all the VPLUS+ R&D costs of VPLUS since very few other telcos
committed to it
– VPLUS power issues may raise both OpEx and CapEx
– Despite the increased bandwidth, G.fast should be lower price/port versus VPLUS
• Risks of technology lock-in
– Risks with committing to a single management system, single system supplier, TR-69
fees, etc.
– All the problems of VDSL remain, only V+ benefit is larger bandwidth. G.fast offers many
technical benefits beyond bandwidth
– G.fast is an open management model – supporting SDN and open source components
• Ready for the cabinet
– G.fast can and will scale. Expect affordable 48-96 ports, fully vectored in future
– G.fast will be able to meet the rate/reach requirements – with lower radiation & power
– G.fast can be integrated into existing management systems, but offers lower cost
alternatives such as Netconf/Yang and OpenFlow

5. Jul 16, 2015Sckipio | G.fast vs VPLUS Comparison5
Summary
• Sckipio G.fast provides
– Faster performance at virtually every distance
– Flexible Down/Up asymmetry ratio
– Substantially more robust with Robust Management Channel
– Superior vectoring robustness, adaptation and performance
– Open management framework
– Scales to whatever is needed (up to 96 ports is feasible)

6. Jul 16, 2015Sckipio | G.fast vs VPLUS Comparison5
Summary
• Sckipio G.fast provides
– Faster performance at virtually every distance
– Flexible Down/Up asymmetry ratio
– Substantially more robust with Robust Management Channel
– Superior vectoring robustness, adaptation and performance
– Open management framework
– Scales to whatever is needed (up to 96 ports is feasible)