On some channels (CALCORD for example), CHP Extenders only receive radio traffic after they've been keyed up once (ok that sorta makes sense). However, they time out and stop receiving after a short time (not such a good idea - no officer is going to key it up once per minute or so to keep it alive). Is there anyone knowledgeable on their proper operation? Field officers have no clue beyond basic unit to dispatch or unit to unit usage.