A communications network configuration for delivery of multimedia services comprises a packet network to which a plurality of terminal devices are connected, a service provider network for providing multimedia services to the terminal devices, a virtual circuit switched network intermediate the packet and service provider networks, and a gateway distributed over the circuit switched network. In an example method, a network node determines whether a target wireless communication node will need to obtain timing information for at least one cell to be included in the assistance data. The request is translated to a second request format that is compatible with the content provider and sent to the content provider. The lithography system can include one or multiple alignment load-locks.