-- Executing Authenticate("SIP/4303-081d0680", "/etc/asterisk/pinsets|a") in new stack
    -- Playing 'agent-pass' (language 'en')
    -- Playing 'auth-thankyou' (language 'en')
    -- Executing Dial("SIP/4303-081d0680", "Unicall/g1/23701300") in new stack
    -- Called g1/23701300
Jul 19 16:52:40 WARNING[5086]: chan_unicall.c:2644 handle_uc_event: Unicall/2 event Dialing
Jul 19 16:52:41 WARNING[5086]: chan_unicall.c:2644 handle_uc_event: Unicall/2 event Far end disconnected
Jul 19 16:52:41 WARNING[5086]: chan_unicall.c:2930 handle_uc_event: CRN 32771 - far disconnected cause=Unallocated (unassigned) number [1]
    -- Channel 0 got hangup
    -- UniCall/2-1 is circuit-busy
    -- Hungup 'UniCall/2-1'
  == Everyone is busy/congested at this time (1:0/1/0)
    -- Executing Goto("SIP/4303-081d0680", "1-CONGESTION|1") in new stack
    -- Goto (4303,1-CONGESTION,1)
    -- Executing PlayTones("SIP/4303-081d0680", "congestion") in new stack
    -- Executing Hangup("SIP/4303-081d0680", "") in new stack
  == Spawn extension (4303, 1-CONGESTION, 2) exited non-zero on 'SIP/4303-081d0680'
Jul 19 16:52:41 WARNING[4776]: chan_unicall.c:2644 handle_uc_event: Unicall/2 event Drop call
Jul 19 16:52:41 WARNING[4776]: chan_unicall.c:2644 handle_uc_event: Unicall/2 event Release call
    -- Unicall/2 released