Abstract: A call center maintains various pools of telephone numbers, where each telephone number pool comprises a plurality of telephone numbers in a geographic area. A call originating to a called number uses a calling telephone number that is selected from one of a plurality of telephone number pools based on the area designated by the called number. An index value is used to select the telephone number from the selected telephone number pool. The selected telephone number is used to as a calling telephone number when originating a call to the called party.

Abstract: A secure three-way bridge in a SIP-based processing switch protects sensitive information provided by a party during a call with an agent in a contact center. During the call, the agent may bridge an interactive voice response system (“IVR”) onto the call using the secure three-way bridge so that the party can enter sensitive information, such as a credit card account, to the IVR. The information is provided by the party using dual-tone multiple frequency (“DTMF”) tones that are presented in an unmodified form to the IVR, but modified and then presented to the agent, so that the agent is unable to discern the sensitive information provided by the party. Other embodiments may accomplish similar capabilities by application of components outside of the bridging structure. Further, recording systems may record the call comprising the modified audio, thus protecting the sensitive information from subsequent detection upon review of the recording.