Do Cortex Handsets allow a PA or Intercom function? Follow Currently this is not supported by the Cortex Handsets, but it is on our development roadmap. Related articles How long does the Cortex Handset battery last and can it be replaced? Does Cortex support a multilingual user interface? Can a second Cortex Handset listen to different channels? Cortex Release History Can I program the MMSI number Cortex myself?