Technical Tips & Guides

Ubiquiti UISP Fiber OLT XGS
Ubiquiti UISP Fiber OLT XGS

The Ubiquiti UISP Fiber OLT XGS (UB-UF-OLT-XGS) is the latest Optical Line Terminal (OLT) from Ubiquiti, offering significant speed enhancements over previous generations. It utilises high-speed 25G SFP28 uplink ports alongside 10G XGS/XG/GPON ports. The PON ports are compatible with the new XG/XGS optical transceivers, seamlessly connecting to the UISP Fiber XGS and UISP Fiber XG Optical Network Units (ONUs).

Specifications at a Glance:

Ubiquiti UISP UFiber OLT XGS | 8 Port

  • (4) 25G SFP28 uplink ports
  • (8) 10G XGS/XG/GPON ports
  • Supports AC/DC power module redundancy

Ubiquiti UISP UFiber XGS ONU/ONT

  • (1) XGS-PON port
  • (1) 10GbE RJ45 LAN port
  • Supports 10Gbps uplink/downlink speeds

Ubiquiti UISP UFiber XG GPON ONU/ONT

  • (1) XG-PON port
  • (1) 2.5GbE RJ45 LAN port
  • Supports 24V PoE input
  • Supports 2.5Gbps uplink and 10Gbps downlink speeds

Backward compatibility and migration

Ubiquiti has ensured backward compatibility with existing GPON infrastructure by supporting the GPON optical transceivers (UB-UF-GP-B+ and UB-UF-GP-C+). This allows seamless coexistence of your current GPON setup while adding new XGS devices for clients seeking higher internet speeds. The UB-UF-OLT-XGS can be integrated with the UISP Application for easy management and monitoring or managed locally via a web interface.

This allows seamless coexistence of your current GPON setup while adding new XGS devices for clients seeking higher internet speeds. The UB-UF-OLT-XGS can be integrated with the UISP Application for easy management and monitoring, or managed locally via a web interface.

Migration steps from GPON to XGS

To migrate existing GPON ONUs to the XGS OLT:

  1. In the ONU list tab on the GPON OLT, select the ONUs you wish to migrate.
  2. Click Configure and export the ONUs configuration.
  3. On the XGS OLT, import the ONUs configuration file.
  4. Move the ONUs and GPON optical transceivers to the XGS OLT.
  5. If the GPON OLT is connected to the UISP Application, remove offline ONUs after migration.

Incorporating XGS hardware with existing GPON infrastructure

There are three methods to integrate the new XGS hardware with existing GPON equipment:

Method 1: WDM filter with single fibre cable/splitters and only the UB-UF-OLT-XGS OLT (Optimal)

Example: Using XGS top, GPON bottom, 1 splitter

Advantages:

  • Co-existence of XGS and GPON networks through the same fibre/splitter
  • Easy installation and hardware recycling

Disadvantages:

  • None – Redeployment f the GPON OLT can offset the cost of adding the WDM filter 

Method 2: WDM filter with single fibre cable/splitters, Adding the UB-UF-OLT-XGS OLT to the existing UB-UF-OLT-4/UB-UF-OLT

Example: using XGS top, GPON bottom, 1 splitter, GPON OLT retained

Advantages:

  • Co-existence of XGS and GPON networks
  • Redundancy with two separate OLTs

Disadvantages:

  • Higher costs due to additional power requirements and no redeployment of the GPON OLT

Method 3: No WDM filter with multiple fibre cables/splitters

Example: - XGS left, GPON right

Advantages:

  • Simple installation

Disadvantages:

  • Limited backward compatibility without WDM

Frequently Asked Questions

  1. Can I use GPON and XG/XGS optical transceivers on the same XGS OLT? Yes, PON ports support both XG/XGS and GPON transceivers.
  2. Can XG/XGS ONUs be connected to a GPON optical transceiver? No, this is not possible.
  3. Can GPON ONUs be connected to the XG/XGS optical transceiver? No, this is not possible.
  4. Can I use a XG/XGS/GPON combo optical transceiver on the XGS OLT or GPON OLTs? No, this is not possible.
  5. Can I use a XG/XGS transceiver on the GPON OLTs? No, this is not possible.
  6. What connector type is used on the WDM filter? SC/UPC (Blue) connectors are used for COM, GPON, and XG/XGS ports.
  7. Can I use any port on the WDM filter for GPON or XG/XGS PON? No, the 24 ports on the WDM filter are dedicated to specific functions.

Contact us on sales@miro.co.za or 012 657 0960 to future-proof your fibre networks with the latest Ubiquiti XGS hardware. 

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