== Everyone is busy/congested at this time (1:0/1/0)
    -- Executing Hangup("SIP/1001-08214e38", "") in new stack
  == Spawn extension (1001, 1-CHANUNAVAIL, 2) exited non-zero on 'SIP/1001-08214e38'
May 21 22:58:08 WARNING[904]: chan_unicall.c:2644 handle_uc_event: Unicall/1 event Drop call
May 21 22:58:08 WARNING[904]: chan_unicall.c:2644 handle_uc_event: Unicall/1 event Release call
    -- Unicall/1 released