5th Generation GPON ONT introduction
We're introducing a new 5th Gen GPON ONT (model type 500) that will become our new standard ONT for core NGA connections
Overview
We have received an ‘end of sale’ notice from Nokia for the type 400 GPON ONT as its manufacture will soon cease. We have placed a final order which is forecast to meet demand up to November 2025. This new 5th Gen GPON ONT (model Type 500) will become our new standard ONT for core NGA connections.
The type 500 ONT will ensure customers can continue to enjoy the benefits of fibre connectivity well after the type 400 ONT is no longer available.
We can now confirm that the new 5th Gen GPON ONT is the Zyxel PX5301.

Quick find
Timeline and approach
Consultations on the new ONTs took place near the end of 2024, during which we gathered and discussed your feedback.
RSP ONT Testing will began in May 2025. Thank you to those that tested and gave us feedback.
Technicians will continue using existing van stock of 4th Gen GPON ONTs before transitioning fully to the PX5301.
Soft launch is planned for 28 July 2025 in CSA1 (South Island patch) and CSA9 (Northern Auckland).
Full Launch will be on 25 August 2025 across all areas as techs run down stocks of 4th Gen ONTs.
26 June 2024
Consultation opens
Consultation is open until 24 October 2024. Please provide feedback via our feedback form or contact your account team to arrange a meeting to discuss further.
23/24 July 2024
RSP Workshop 1
Chorus intends to run workshops to keep you up to date on how we progress through this project. These will cover your feedback, ONT capabilities, rollout plan, testing, mounting and the customer experience, etc.
October 2024
ONT test plan provided to RSPs
Chorus will provide the test plan for the new ONT.
October 2024
RSP Workshop 2
Chorus present the selected ONT model based on requirements and feedback.
24 October 2024
Consultation closes
Consultation closes and feedback will be provided.
October 2024
Notice of LFC Equipment Change
Notice of LFC Equipment Change
Feb 2025
Label design workshop
Chorus workshop to look at the design of the labels for the new ONTs.
Mar 2025
Select a new ONT
2025
Service company training
Documentation updated and training rolled out to service companies on the new ONT.
May 2025
RSP testing via CCIL lab
RSPs will be able to test the new ONT on the correct software version in CCIL and labs.
28 July 2025
Soft launch
Technicians will start installing Type 500 ONTs in CSA 1& 9
25 August 2025
Full launch
Technicians will start installing Type 500 ONTs in all areas
What’s next

What’s next
Make sure that you have added the new ONT values to systems that use B2B and APIs before 28 July 2025.
Make sure that your staff are aware that we will start installing these on 28 July 2025.
The SP site and ONT support pages will be updated before this release.
Frequently asked questions
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