The disclosure relates to a remote query and remote maintenance of a communications module. To this end, the invention provides a method and device is provided for querying data by means of a data call between a service facility and a communications module over a communications network. A data query of a first interface unit sent by a service facility and received via the communications network is forwarded to another interface unit of a communications module, where the data query is interpreted in the interface unit and the interpretation result is evaluated by an evaluation unit. Response data for the data query is, based on the interpretation result from the evaluation unit, sent via the first interface unit to the service facility.