Network Management Basics

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