OLT Software Upgrade
This article documents upgrading the Tellabs OLT using the Panorama PON EMS. It covers best practices for upgrades involving OLTs with single and redundant ESUs (Ethernet Switch Units). It also discusses procedures for upgrading PON protected OLTs.
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Note: The supporting screenshots in this article are Windows 11 from a Tellabs installation. |
Document Number
ENG-010672
Document Revisions
| Revision | Date | Notes |
|---|---|---|
| Revision A | April 2023 | Formal Release of Document |
| Revision B | Aug 2024 | Added a Warning relating to EMS upgrade in OLT Pre Upgrade, Added the OLT2 to Single ESUs |
| Revision C | April 2025 | Added Scheduled Software Download to Best Practices. |
Intended Audience
This document is intended for technicians responsible for:
- System Maintenance
Applicable Equipment
OLTs With Redundant ESUs
- OLT-6
- ESU32
- OLT-1134
- ESU32
- OLT-1150E
- ESU2
OLTs With a Single ESU
- OLT1
- OLT2/OIU2
Related Documentation
- OLAN PON Protection
Terminology
Primary ESU - In an OLT with redundant ESUs (two hardware cards protecting each other), the primary ESU (ESUA) is just terminology used to accurately distinguish the two ESUs. The Primary is the unit on the left within the shelf. This designation never changes.
Secondary ESU - The Secondary ESU (ESUB) is on the right.
Active ESU - In an OLT with redundant ESUs, this is the ESU currently managing the system. This state changes over time.
Standby ESU - In an OLT with redundant ESUs, this is the ESU that is waiting to take over OLT management in the event of a failure of the Active unit. The Standby ESU is a hot standby and all configuration and state are present on the unit.
Backup - Making a copy of the database for later recovery in the event of a failure.
Restore - Using a Backup to restore the system to a previous state.
Golden Card - Hardware copy of the software and database, currently in use, to be used for a rapid rollback in the case of an upgrade failure.