An IP telephony gateway and a user interface resource enable a subscriber to place an outgoing call according to the voice over IP protocol to a destination party from a user interface session of an intelligent dial tone service such as voice activated dialing, and resume the user interface session upon completion of the outgoing call with the destination party. An index is composed of multiple slices, with each slice storing multiple entries and each entry representing one content item or one campaign or collection of content items. It is further disclosed how this, and further improvements for FET devices, such as raised sourcedrain and multifaceted gate on insulator, MODFET on insulator are integrated with strained Si based layer on insulator technology.