I often get asked the same two questions by service providers:
“Why are there so many 10G PON standards?”
“Which one should I use?”
In reality, the next wave of standards beyond 10G are already being created, so deployments will always be behind the standards creation. But. for service providers to be successful, they must pick a standard and move forward with deploying that standard. It’s a bit scary wondering if you’ve made the right decision, especially if you choose one that doesn’t have support from the majority of the telecom ecosystem behind it. You could end up with high costs and little support from your vendors.
A quick look at the latest options include:
- XG-PON (10G down / 2.5G up) – ITU G.987, 2009. XG-PON is essentially a higher bandwidth version of GPON. It has the same capabilities as GPON and can co-exist on the same fiber with GPON. XG-PON has been minimally deployed to date.
- XGS-PON (10G down / 10G up) – ITU G.9807.1, 2016. XGS-PON is a higher bandwidth, symmetric version of GPON. Again, the same capabilities of GPON and can co-exist on the same fiber with GPON. XGS-PON deployments are just beginning.
- NG-PON2 (10G down / 10G up, 10G down / 2.5G up) – ITU G.989, 2015. Not only is NG-PON2 a higher bandwidth version of GPON, it also enables new capabilities like wavelength mobility and channel bonding. NG-PON2 co-exists well with GPON, XG-PON, and XGS-PON and deployments are expected to begin late 2017.
Service providers choosing their next PON technology want to choose one that will work for all their PON-based services (residential, business, mobile) and provide a high return on investment. In order to choose correctly, it’s important to look at all aspects of the deployment, not just the obvious OLT, ONT, and optical components required.
For instance, with NG-PON2, delivering services up to 80G is possible, which significantly extends its deployment applications and life in the network. In addition, because of its multiple wavelengths, service providers can converge their multiple services networks into one, significantly reducing the overall cost of the network.
Learn more about NG-PON2’s unique capabilities with this whitepaper: Next-Generation PON: Eliminating physical restraints from the access network.