1. A method of configuring communications in a voice network via a data network, comprising: providing a calendar user interface configured to display at least a portion of a calendar having a plurality of time periods, the calendar user interface including an appointments section and a call forwarding pattern section, the appointments section displaying appointment information applicable to the plurality of time periods, the forwarding pattern section displaying indications of call forwarding patterns for forwarding communications in the voice network and applicable to the plurality of time periods, each of the call forwarding patterns including a source identifier, a destination number and a forwarding destination identifier; receiving, via the call forwarding pattern section of the calendar user interface, a selection of an identifier of a call forwarding pattern to be associated with one of the plurality of time periods of the calendar; storing the identifier of the identified call forwarding pattern in the calendar in association with the one of the plurality of time periods of the calendar; and configuring the voice network based on the identified call forwarding pattern and the one of the plurality of time periods of the calendar.