Hi everyone!
Today I will continue to write migration from GPON to XG(S)-PON. In the last article, I explained hybrid solution – combination GPON and XG(S)-PON service boards. Now, I will explain the second solution for migration from GPON to XG(S)-PON. Let's get started.
The second solution for migration is using Combo or Flex PON service boards within the existing OLT or separate OLT. This means replacing GPON service boards with Combo or Flex PON service boards. These boards have optical modules that combine GPON and XG(S)-PON and have a built-in WDM multiplexer/demultiplexer. No need for additional equipment - WDM multiplexers/demultiplexers like in the first solution. In the next two figures, we can see the solution with GPON&XG(S)-PON combo boards (figure 1) and PON combo optical module (figure 2).
Figure 1. The second solution – using GPON&XG(S)-PON combo boards
Figure 2. PON combo optical module
Combo PON boards can support GPON and XG-PON or GPON and XGS-PON (for example, H902CSHF and H902CGHF). On the other side, the Flex PON board can support GPON, XG-PON, XGS-PON, GPON+XG-PON Combo, and GPON+XGS-PON Combo (for example, H903FLHF and H902FLHF). Figure 3. shows us the example of Flex-PON board – H902FLHF with the main features and benefits.
Figure 3. The example of Flex-PON board – H902FLHF
As with the previous solution, OLT and NMS software upgrades are required, and control boards are rarely replaced. The main problem with this solution is the previous investment in GPON service boards that now need to be deinstalled.
The migration process requires the activation of the XG(S) PON RTU license, which is achieved through NMS software. After that, we have to configure each PON port as Combo-PON port or Flex-PON port mode.
The situation after the migration from GPON to XG(S)-PON is completed is shown in the following figure. OLT only has service boards that support XG(S)-PON, and ONU devices are XG(S)-PON ONU.
Figure 4. The situation after evolution
This is the end of this topic. I hope you have learned something new.
Thank you!
