ONU/ONT Statuses

The FX120/FX120 Lite can report three ONT statuses:

  1. Registered
  2. Unregistered
  3. Rogue

Registered (Activated)

Registered means that the ONT/ONU serial number was acknowledged by the OLT port (aka PON-ID) to be a valid SN so the activation process can continue through the remaining steps. This means that communication between the ONT and OLT was established and continues on. The activation process can resume until the OLT and ONT are both in sync.

Unregistered (Alien)

An Unregistered status displays when the ONT is an Unknown or Alien device. A common reason for this is that the ONT does not belong on this PON-ID.

Examples :

  • If a technician were to connect an EPON ONT or an XGS-PON ONU with a GPON OLT.

  • If the ONT SN was never registered to the PON-ID.

In these types of situations, the OLT will send a message that it does not recognize this ONT SN and will request the ONT to deactivate itself.

Rogue (Deactivated)

A Rogue ONT is when a registered ONT transmits outside of the OLT allocated transmission time slot either intermittently or continuously. This can happen when an ONT is defective or overheated. This causes the ONT transmission to collide with other registered ONTs transmission on the same PON-ID who are keeping within their timeslot, resulting in transmission errors. In many cases, a rogue ONT does not have service issues, but other ONTs on the same PON-ID are may report service issues.

Refer to Rogue ONTs for more information on detecting Rogue ONTs.