Our ONS-15454 chassis are approaching 10 years old and we have started to see fan failures.  But when a fan fails, it does not create an alarm within the CTC or generate a remote alarm.  We do see the "Fan Fail" light on the fan tray illuminate, but ...

We have an ONS-15454, OC-48, UPSR ring that we need to change the optical cards between 2 nodes. We will be going from the OC-48, 1550 LR to the OC-48, 1310 IR.  Would making this change be as simple as deleting the 1550 LR cards at each node, then i...

We are attempting to create an STS-3c Ethernet circuit between 2 nodes that both have the E100T-12-G Ethernet cards on an OC-48 ring.  We know there is the limitation of 12 total STS's that can be created on each of the E100T cards.  Node A has (6) S...

We utilize the "Local Alarms" pin-outs on the backplane of one node and connect to an external alarm notification device (A simple relay, light and beeper system). We've been using this for 4-5 years. Recently our alarm device is no longer being tri...

Running a 17 node ONS-15454, UPSR Ring with Software ver. 6.0.3.Why is it that when viewing or editing some circuits you do not see a Protect Path? On most circuits, you see a green working path and the purple protect path. We occasionally see circ...