Certain examples are described relating to resource allocation for one or more digital signal processors in a media gateway. Processing of telecommunication calls are allocated to different digital signal processor cores in the media gateway. When more processing resources are required for a call, a determination is made as to whether any of a set of digital signal processor cores are able to provide these resources. Responsive to a particular digital signal processor core being unable to provide the further processing resources, a reallocation process is initiated. This may involve reserving resources on a further digital processor core, releasing the original set of processing resources and allocating the processing of the call to the further digital processor core.