Mumbai University > Electronics and Telecommunication > Sem8 > Telecom Network Management

Marks: 10 M

Year: May 2016

M3 Interface: Customer Network Management of Public Networks

The M3 management interface is between the private NMS and the public NMS. It allows customers to monitor and configure their portions of the public ATM network.

Figure1 shows how a customer would typically interact with the public NMS via the carrier management system.

Two classes of M3 requirements are shown: status and configuration monitoring (class I), and virtual configuration control (class II).

• Class I requirements are those that a public NMS offers to the customer, monitoring and management of configuration, fault, and performance of a specific customer's portion of a public ATM network.

• This service is offered only for a permanent virtual circuit (PVC) configuration.

• Examples of this service are (1) retrieving performance and configuration information for a UNI link and (2) public NMS reporting of a UNI link failure via an alarm or trap message to the user NMS.

• Class II service provides greater capability to the user, who can request the public NMS to add, delete, or change virtual connections between pairs of the customer's UNIs.

• An example would be a customer wanting to establish a new virtual path or increase the number of virtual circuits in a given virtual path.

• A customer network management (CNM) manages both private and public ATM networks. A CNM agent residing in the public ATM network provides the M3 service.

• The service is limited to the portion of the public service provider's network that the user's circuit traverses. If the user's circuit traverses multiple service providers, a separate interface with each provider is needed.

• The CNM sends requests to the carrier management system (see Figure1), which acts as an agent to the CNM. The carrier management system then invokes the request on the network elements or other NMS and returns the responses to CNM.

M5 Interface:

• The final interface M5 is between the NMSs of two service providers. It is most complicated of all interfaces.

• M5 supports interactions and exchange of management information between any two public networks.

• M5 supports interactions and exchange of management information between any two public networks.

For M1, M2, M4 Refer (Discuss Ml, M2 and M4 interface in ATM network management) asked in May 2015.