Executing [430@phonesystems:1] Pickup("SIP/51-0839d250", "30") in new stack
[Jun 25 09:35:32] NOTICE[9449]: app_directed_pickup.c:159 pickup_exec: No target channel found for 30.
  == Auto fallthrough, channel 'SIP/51-0839d250' status is 'UNKNOWN'

i do _4XX,1,Pickup(${EXTEN:1})