A push notification server operates on a client device to manage push notifications that the client device receives from various push servers. The excitation control circuit comprises at least one converter and at least one ACDC conversion module. Alternatively, the circuit may be integrated onto a circuit board or within an integrated circuit as desired. A Load Distribution Function master router is determined for the set of routers, wherein each one of the set of routers is a backup for the LDF master router. The new page is tagged as execute only, so the program to be tested is unaware of any changes to the program. A coordinator transmits periodically a beacon, in which time between two consecutive beacons constitute a beacon interval.