A down-converter for receiving a multiband radio frequency signal and a local oscillator signal comprises a frequency divider and a heterodyne receive chain. Content associated with user names for one or more custodians is maintained in a collaboration environment. The termination is hybrid since there is both an in-series and an in-parallel component to the termination resistance. The battery pack may also serve as an extendible platform by providing additional integrated communication interfaces andor processors that can be utilized by the mobile communication device to extend its communication andor processing capabilities.