The ProVoice/EDMAC update is availible:
Info Link:
ProVoice < UnidenMan4 < TWiki
Upgrade Links:
BCD436HPFirmwareUpdate < UnidenMan4 < TWiki
BCD536HPFirmwareUpdate < UnidenMan4 < TWiki
Sentinel Update:
BCD436HP < UnidenMan4 < TWiki
There are additional steps to purchase the update. You have...