
Here is a bit of CLI action as I played with the call - several flashes and hangup attempts  - eventually I did soft hangups. Guess I should have done more than 3 vs.

Connected to Asterisk CVS-01/20/04-17:15:14 currently running on hc-ast (pid = 19743)
hc-ast*CLI> 
    -- Remote UNIX connection
?
[Khc-ast*CLI> 
    -- Remote UNIX connection
?
[Khc-ast*CLI> 
  == Spawn extension (hc_fxs, 501, 1) exited non-zero on 'Zap/11-1'
?    -- Hungup 'Zap/11-1'
?
[Khc-ast*CLI> 
Apr 14 12:52:56 WARNING[1167313712]: chan_zap.c:1212 zt_set_hook: ?zt hook failed: Device or resource busy
?    -- Starting simple switch on 'Zap/11-1'
?
[Khc-ast*CLI> 
    -- Hungup 'Zap/11-1'
?


...and here is some channel info...


Channel: 11
File Descriptor: 31
Span: 1
Extension: 
Context: hc_fxs
Caller ID string: "MW PPS 6122 wrudzins" <845-460-6120>
Destroy: 0
Signalling Type: FXO Kewlstart
Owner: Zap/11-2<ZOMBIE>
Real: Zap/11-1
Callwait: <None>
Threeway: <None>
Confno: -1
Propagated Conference: -1
Real in conference: 0
DSP: yes
Relax DTMF: no
Dialing/CallwaitCAS: 0/0
Default law: ulaw
Fax Handled: no
Pulse phone: no
Echo Cancellation: 128 taps unless TDM bridged, currently ON
Actual Confinfo: Num/0, Mode/0x0000
Actual Confmute: No
Actual Hookstate: Onhook
 -- General --
           Name: Zap/11-1
           Type: Zap
       UniqueID: 1081955507.282
      Caller ID: "MW PPS 6122 wrudzins" <845-460-6120>
    DNID Digits: (N/A)
          State: Up (6)
          Rings: 0
   NativeFormat: 68
    WriteFormat: 4
     ReadFormat: 4
1st File Descriptor: 31
      Frames in: 941
     Frames out: 1614
 Time to Hangup: 0
 --   PBX   --
        Context: hc_fxs
      Extension: 501
       Priority: 1
     Call Group: 8192
   Pickup Group: 40960
    Application: ParkedCall
Zap/11-2 is not a known channel
    -- Remote UNIX connection
    
    
         Channel  (Context    Extension    Pri )   State Appl.         Data           
       Zap/13-1  (hc_fxs     501          1   )      Up ParkedCall    501            
  IAX2[ec@ec]/1  (hc-ext     6120         4   )      Up Bridged Call  Zap/13-1       
       Zap/11-1  (hc_fxs     501          1   )      Up ParkedCall    501            
Zap/11-2<ZOMBIE>  (hc-ext     6120         4   )      Up Bridged Call  Zap/11-1       
4 active channel(s)
    -- Remote UNIX connection
 