System responsible for managing at least part of a network. An NMS is generally a reasonably powerful and well-equipped computer, such as an engineering workstation. NMSs communicate with agents to help keep track of network statistics and resources.
A specification of the interface between a backbone system and another backbone system. For example, the specification of an optical interface that connects two optical switches in the carrier network.
A message used by RSVP-TE to notify other nodes of certain failures.