In addition to a standard command line interface (CLI) and Web craft interface for managing individual network elements, Optelian also offers a full-featured client-server network management system for centralized monitoring and surveillance of large networks containing up to many hundreds of network elements (shelves). Network elements are automatically discovered, and the NMS provides a dashboard for event logging, alarm status, network inventory management, performance monitoring and the remote configuration and provisioning of all network elements under one management and control domain. The NMS also provides for centralized software updates that are fully automated, without affecting the continuity of services. The NMS provides full database backup-and-restore capabilities, with DB duplication and/or server redundancy to protect against an NMS server failure. Optelian equipment also offers robust data communication network (DCN) capabilities with options for an optical supervisory channel (OSC) and multi-path reachability of NEs over the DCN, thereby offering increased resiliency and network visibility in the presence of faults, such as fiber cuts or power failures.