Cisco ONS 15327 User Documentation page 535

Glossary
Provisioning user
A CTC security level that allows the user to perform provisioning and maintenance options only. See also Superuser,
Maintenance user, and Retrieve user.
Q
Queue
In routing, a backlog of packets waiting to be forwarded over a router interface.
R
Retrieve user
A CTC security level that allows the user to retrieve and view information but not set or modify parameters. See also Superuser,
Maintenance user, and Provisioning user.
Revertive switching
A process that sends electrical interfaces back to the original working card after the card comes back online.
Rising threshold
The number of occurrences (collisions) that must be exceeded to trigger an event.
RMON
Remote Network Monitoring. Allows network operators to monitor the health of the network with a Network Management
System (NMS). RMON watches several variables, such as Ethernet collisions, and triggers an event when a variable crosses a
threshold in the specified time interval.
Router
Network layer device that uses one or more metrics to determine the optimal path that network traffic should use. Routers
forward packets from one network to another based on network-layer information.
S
Self-healing
The ability of SONET rings to provide automatic network backup with 100% redundancy so if a point of failure occurs on the
fiber ring, the service continues.
Signal degrade
Errors in the SONET signal exceed the threshold for normal operations but are less than the threshold for signal failure.
Signal failure
Errors in the SONET signal exceed the threshold defined for failure.
Cisco ONS 15327 User Documentation, R3.3
GL-11
June 2002