NG-PON2 characteristics
- NGPON2 (TWDM) expansible from 40Gbps: 4 wavelengths @ 10Gbps per wavelength today moving to 8x80Gbps in future
- Bonding capable: Multiple wavelengths may be channel-bonded to provide > 10Gbps services with standards work in progress
- Symmetrical and asymmetrical bit rates to fit any service – Supports 10Gbps down per wavelength and 10Gbps up or 2.5Gbps up per wavelength
- Tunable: ONU’s utilize tunable optical to dynamically tune to provisioned wavelength(s)
- Coexistence: wavelength mux to combine NG-PON2 wavelengths to single fiber, and co-existence
element to combine other technologies to single fiber with NG-PON2 - Point-to-point WDM capabilities on the same infrastructure (4-8 wavelengths)
Impact for the industry & users
- Converge all services for business, consumer, wireless-wireline on a single fiber network
- Pay as you grow architecture: add lambdas as required
- 10Gbps + service capabilities to any subscriber
- Lower OpEx with use of tunable optics
- Lower Latency than single wavelength systems
- Bandwidth rebalancing by reassigning users to different wavelengths
- Allows providers to deliver dynamic bandwidth to any subscriber at any time
- Greater inherent reliability and availability with autonomous ONT re-tuning
- Operational protection: move customers to another wavelength while fixing/resetting the card
- Green: ability to turn off unnecessary CO PON cards at low traffic levels by reassigning wavelengths
- NGPON2 (TWDM) can co-exist with point-to-point NG-PON2, XG-PON1, XGS-PON, GPON, EPON, 10G EPON, RF Video
NG-PON2 service implementation choices
Wavelengths
Resources
Download NG-PON2 30″x20″ wallchart
NG-PON2 technical information
ONU optics
ONT Option | Transmit Power Range | Receive Sensitivity |
Type A – 10G/10G | 4dBm to 9dBm | -7dBm to -28dBm |
Type A – 10G/2.5G | 4dBm to 9dBm | -7dBm to -28dBm |
Type B – 10G/10G | 2dBm to 7dBm | -7dBm to -28dBm |
Type B – 10G/2.5G | 0dBm to 5dBm | -7dBm to -28dBm |
ODN classes
ODN Class | Max Attenuation | Min Attenuation | Differential ODN Loss |
N1 | 29dB | 14dB | 15dB |
N2 | 31dB | 16dB | 15dB |
E1 | 33dB | 18dB | 15dB |
E2 | 35dB | 20dB | 15dB |
Wavelengths
| Channel | Wavelength Downstream | Wavelength Upstream |
ƛ1 | 1 | 1596.34nm | 1532.68nm |
ƛ2 | 2 | 1597.19nm | 1533.47nm |
ƛ3 | 3 | 1598.04nm | 1534.25nm |
ƛ4 | 4 | 1598.89nm | 1535.04nm |
Typical applications
Class | Optic Tuning Time | Application |
Class 1 | <10us | Not Used |
Class 2 | 10us to 25ms | Enterprise Svcs |
Class 3 | 25ms to 1sec | Residential/SoHo |
NG-PON2 standards
- ITU-T G.989: 40Gbps Capable Passive Optical Networks: Definitions, abbreviations and Acronyms
- ITU-T G.989.1: 40Gbps Capable Passive Optical Networks: General requirements
- ITU-T G.989.2: 40Gbps Capable Passive Optical Networks: Physical media dependent (PMD) layer specification
- ITU-T G.989.3: 40Gbps Capable Passive Optical Networks: Transmission convergence layer specification
- ITU-T G.988 ONU management and control interface (OMCI) specification
BBF projects related to NG-PON2
- BBF-247 PON Conformance Certification (BBF member program)
- TR-352: Multi-wavelength PON Inter-Channel-Termination Protocol (ICTP) Specification (published) with amendments for NG-PON2
- TR-331: Architecture & Technical Requirements for PON-based Mobile Backhaul networks
- TR-385: YANG data models for ITU-T Passive Optical Networks
- WT-414: Interoperability Test Plan for NETCONF/YANG OLT management (in progress)
- TR-402: Functional Model for PON Abstraction Interface