Operational Tasks:
Following basic operational tasks are performed by network management
system:
Protection
:
Protection switching takes place within milliseconds ( sub 50 ms) &
hence Circuit recovery in milliseconds ( failure should not be detected by
voice customers)
Restoration:
By doing manual configuration, circuit recovery
achieved in seconds or
Provisioning:
Allocation of capacity to preferred routes (according to certain time
schedules)
Consolidation:
Moving traffic from unfilled bearers onto fewer bearers to reduce waste
trunk capacity
Grooming:
Sorting of different traffic types from mixed payloads into separate
destinations for each type of traffic.
OAM Functions and Layers
Level 1 - Regenerator Section:
Loss of synchronization, signal quality
degradation
Level 2 - Multiplex Section : Loss of frame synchronization, degraded
error performance
Level 3 – Path : Assembly and disassembly, cell delineation control.
Data Communication Channel (DCC)
DCC is a in-band channel to facilitate communication between all Network
Elements (NE) in a network. This facilitates remote login, alarms reporting,
software download, provisioning
