Customer reported that they can not create new trails because of conflict time slots, while the path is not fully occupied.
NG-SDH: OSN3500 & OSN2500
Topology: the NG-SDH equipments connected as SNCP ring but between two nodes in this ring there is another fiber connected and they can not create services on this fiber.
Conflict time slots & new trails can not be created.
-check the VC4 server trails configured or not ((OK))
-check the server use information report ((still there is IDLE time slots)).
-check discrete services: we found that there are two fibers between two NE's in the ring and the customer do some add/delete operations on this ring, which results in many discrete services on the related fiber (there is two positive working channel one on each fiber between the two nodes and this results on the conflict time slots) after deleting the wrong cross connect from the nodes (SDH service configuration) the problem solved.
- VC4 server trails not configured or fully occupied.
-Discrete services or wrong cross connect on one of the NE in the path.
After any delete operation; be sure that you delete all the discrete services (cross connect) on the deleted node to avoid such discrete services when we use the same ports in future.