15. The system of claim 10 , wherein the network surveillance module is further configured to detect a condition in the wide area network based on the root-cause analysis, and initiate at least one remedial action configured to remedy the condition in the wide area network.
10. A system comprising: a network surveillance module of a network management subsystem configured to manage a wide area network, the network surveillance module configured to conduct surveillance of the wide area network; and an alarm message conversion module of the network management subsystem, the alarm message conversion module including at least one hardware processor configured to: receive a plurality of network alarm messages provided by a plurality of network elements of the wide area network, the plurality of network alarm messages being in a plurality of heterogeneous message formats, convert the plurality of network alarm messages in the plurality of heterogeneous message formats to a plurality of new network alarm messages in a network universal message format based on a plurality of mapping data files and a plurality of translation rules data files associated with the plurality of heterogeneous message formats, provide the plurality of new network alarm messages in the network universal message format to the network surveillance module for use by the network surveillance module in conducting the surveillance of the wide area network, wherein the network surveillance module is configured to conduct the surveillance of the wide area network by interpreting the plurality of new network alarm messages in the network universal message format and performing a root-cause analysis based at least in part on the interpreted new network alarm messages in the network universal message format, receive a request to add a new mapping data file and a new translation rules data file associated with a new message format to the plurality of mapping data files and the plurality of translation rules data files associated with the plurality of heterogeneous message formats, and add the new mapping data file and the new translation rules data file associated with the new message format to the plurality of mapping data files and the plurality of translation rules data files associated with the plurality of heterogeneous message formats for use by the alarm message conversion module in translating one or more network alarm messages from the new message format to the network universal message format, wherein the addition of the new mapping data file and the new translation rules data file is performed without interrupting the surveillance of the wide area network.