Abstract: One aspect provides a modem for use at a terminal. The modem comprises a first interface, a second interface, and a processing unit. The first interface is arranged to connect to a network. The second interface is arranged to connect to a host processor on the terminal. The processing unit is arranged to perform a procedure to attempt to connect to the network via the first interface. The processing unit is also arranged to receive an indication of an operating mode that the host processor is operating in from the host processor via the second interface, where the operating mode is one of a plurality of operating modes. The processing unit is further arranged to, in the event of failure of the procedure, repeat performing the procedure at a time controlled in dependence on the received indication.