Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for managing configurations of telecommunications nodes. In one aspect, a system includes a file server; a subtending device coupled to the file server, and a telecommunications node coupled to the subtending device. The subtending device can include one or more line cards that connect one or more telecommunications nodes to a network. The telecommunications device receives, from the file server and based on provisioning information provided by the subtending device, an auto-config file for the telecommunications node and parses the auto-config file to identify a first filename of a unit-specific configuration file. A wildcard value in the first filename is replaced with a unit-specific identifier, and a unit-specific configuration file is requested from the file server. One or more parameters of the telecommunications node are configured based on a response to the request.