New technologies options include WDM-PON, VDLS2 bonding, G.fast, and more. In addition, there are new compression techniques and noise mitigation that extend the life of existing networks. Which approaches are practical, necessary and beneficial and what factors determine the best path to take?

1. AFTER
Next Generation Access Technologies
Practical Considerations

2. What’s Deployed Today?
1000
EFM Ethernet 1Gbps
Downstream Speed (mbps)
100
2.5 GPON (100-200 Mbps effective)
75
EFM Ethernet 100Mbps
45
VDSL2
Bonded ADSL2+
EPON
24
ADSL2+
1 3 5 7 9 11 13 15 17 19
Distance (kft)
2

3. A Peek at New Technologies
Technology Projected BW Availability Promised Benefit
G.Vector 80-100 Mbps 2011 Improvements from
reduction in crosstalk
interference
Super MIMO 100 to 300 Mbps TBD Increased bonded link
(Vendor specific) capacity via ‘phantom’ pair
10G GPON / Splitter 2013 and Backwards compatible with
GEPON dependent beyond existing PONs
NG-PON2 40+ Gbps 2015 and Much higher bandwidth per
aggregate beyond??? subscriber
3

4. Considerations – Infrastructure
CO / RT OSP CO / RT OSP CO / RT OSP
FTTC Point to Point to Point
Multipoint
Other Infrastructure Considerations
RF vs IPTV
Spectral management – DSL and PONs
Aerial vs buried, right-of-ways, pole vs pad vs retrofit
4

5. Considerations – Vectoring
Vectoring has much promise but performance will vary
Value is directly proportional to its widespread use in the OSP
Pairs that are not within the vectored group can negatively impact
pairs within the group by having power levels too high
Benefits of vectoring most measurable at loops less than 4 kft
Rate predictability should improve but reach remains an Achilles heel
Best results come when all
pairs are vectored
5

6. 2.5 GPON Migration Options
Option 1: 10G GPON Coexistence
2.5 GPON ONTs designed anticipating 10G GPON standard
Option 2: Deploy blocking filters on existing ONTs
Labor and truck roll intensive, makes sense in limited volumes
Option 3: Utilize 10G only on new PONs
Easiest approach from an operational and cost point of view
Option 4: Replace old ONTs
Makes sense in areas with depreciated or pre-2.5 GPON ONTs
Option 5: Shift to Point-to-Point GE
Auto-sensing ONTs mitigate operational and technical challenges
May need to reinforce feeder fibers
Option 6: No migration needed, happy with 2.5 GPON
6

7. Changes in Access Technology
Change can be
Evolutionary
Or change can be
Revolutionary
7

8. You Have Options
Today G.Vector 2020
10G GPON NG PON2
FTTN FTTC FTTP
8

9. Thank You