[asterisk-users] Answering Machine Detection

Tong lttong at socal.rr.com
Sun Dec 2 10:49:40 CST 2007 

If i use AMD() or the code below, now the problem is the fax machine/modem detection and answer machine detection get detected as the same.  If i need to seperate the two how do i do that?  For example, if i use AMD() to detect an answer machine by saying any greeting exceeding 2.5 seconds is a machine, how do i distinguish between a fax/modem and a long greeting?



---- dave cantera <david.cantera at iacnet.net> wrote: 
> carlos,
> you got further than I did... AMD didn't work at all on my release.. I 
> think I was using 1.4.11 at the time...
> I ended up using the below
> daveC
> 
> ;-----------< amdtest (ext 13) starts here >--------------------
> ;
> ; restructure this for the following conditions:
> ; 13 using waitforsilence(variable set) then play message
> ; only works when there is an answering machine picking up and it doesn't
> ; cut off (hangup) before SILENCEDURATION ms
> exten => 13,1,NoOp( Starting exten 13 AMD stuff)
> exten => 13,n,Wait(1)
> exten => 13,n,Set(SILENCEDURATION=4300)
> exten => 13,n,Set(SILENCEOCCURANCES="")
> exten => 13,n,Set(SILENCETIMEOUT=38)
> exten => 13,n,NoOp( SILENCEDURATION=${SILENCEDURATION} )
> exten => 13,n,NoOp( SILENCEOCCURANCES=${SILENCEOCCURANCES} )
> exten => 13,n,NoOp( SILENCETIMEOUT=${SILENCETIMEOUT} )
> ;exten => 13,n,Answer
> exten => 
> 13,n,WaitForSilence(${SILENCEDURATION},${SILENCEOCCURANCES},${SILENCETIMEOUT})
> exten => 13,n,NoOp(Retnd WAITSTATUS=${WAITSTATUS} )
> exten => 13,n,Playback(lax/lax-important-msg-from)
> exten => 13,n,PlayBack(lax/to-hear-msg-press-1)
> exten => 13,n,Read(CALL_ACK,beep,1,,,3)
> exten => 13,n,NoOp(CALL_ACK is >${CALL_ACK}<)
> exten => 13,n,GotoIf([${CALL_ACK} = ""]?nak13)
> exten => 13,n(ack13),NoOp( Ack )
> exten => 13,n,NoOp( log the ACK acknowlegement here calling the AGI script)
> ;exten => 13,n,AGI(lax/track-laxcalls.sh,${EXTEN},${CALL_ACK})
> exten => 13,n,GotoIf([${CALL_ACK} = ""]?play13)
> exten => 13,n(nak13),NoOp( Nak )
> exten => 13,n,NoOp( log the NAK acknowlegement here calling the AGI script)
> ;exten => 13,n,AGI(lax/track-laxcalls.sh,${EXTEN},${CALL_ACK})
> exten => 13,n(play13),Playback(lax/lax-important-msg-from)
> exten => 13,n,Playback(tt-weasels)
> exten => 13,n,Playback(tt-monkeysintro)
> exten => 13,n,Wait(1)
> exten => 13,n,Hangup
> 
> 
> 
> 
> 
> Carlos Chavez wrote:
> > 	I am having a bit of a problem getting AMD to work on a new server.  On
> > my regular office server it works like a charm.  I am running Asterisk
> > 1.4.13, Zaptel 1.4.5.1 on both machines.  Both servers run CentOS 5 and
> > I am using a SIP trunk to send out calls (the same one on both servers).
> >
> > 	Here is the output of a call on my office server:
> >
> >     -- Attempting call on Local/0445540881644 at CC2 for 2001 at CC:1 (Retry
> > 1)
> >     -- Executing [0445540881644 at CC2:1]
> > Set("Local/0445540881644 at CC2-c93c,2", "CIDTEMP="1" <5540881644>") in new
> > stack
> >     -- Executing [0445540881644 at CC2:2]
> > Dial("Local/0445540881644 at CC2-c93c,2", "SIP/protel-out/0445540881644|
> > 25") in new stack
> >     -- Called protel-out/0445540881644
> >     -- SIP/protel-out-0934bb28 is making progress passing it to
> > Local/0445540881644 at CC2-c93c,2
> >     -- SIP/protel-out-0934bb28 answered Local/0445540881644 at CC2-c93c,2
> >     -- Executing [2001 at CC:1] NoOp("Local/0445540881644 at CC2-c93c,1", ""1"
> > <5540881644>") in new stack
> >     -- Executing [2001 at CC:2] AMD("Local/0445540881644 at CC2-c93c,1", "")
> > in new stack
> >     -- AMD: Local/0445540881644 at CC2-c93c,1 5540881644 (null) (Fmt: 64)
> >     -- AMD: initialSilence [2500] greeting [1500] afterGreetingSilence
> > [800] totalAnalysisTime [5000] minimumWordLength [100]
> > betweenWordsSilence [50] maximumNumberOfWords [5] silenceThreshold
> > [256] 
> >   == Spawn extension (CC2, 0445540881644, 2) exited non-zero on
> > 'Local/0445540881644 at CC2-c93c,2'
> >     -- Executing [h at CC2:1] DeadAGI("Local/0445540881644 at CC2-c93c,2",
> > "agi://localhost/updateCallStatus.agi?callStatus=hangupcc2") in new
> > stack
> >     -- AGI Script
> > agi://localhost/updateCallStatus.agi?callStatus=hangupcc2 completed,
> > returning 0
> >     -- AMD: Word detected. iWordsCount:1
> >     -- AMD: Changed state to STATE_IN_SILENCE
> >     -- AMD: HUMAN: silenceDuration:800 afterGreetingSilence:800
> >     -- Executing [2001 at CC:3] GotoIf("SIP/protel-out-0934bb28", "1?7:4")
> > in new stack
> >     -- Goto (CC,2001,7)
> >     -- Executing [2001 at CC:7] AGI("SIP/protel-out-0934bb28",
> > "agi://localhost/updateCallStatus.agi?callStatus=answered") in new stack
> >     -- AGI Script
> > agi://localhost/updateCallStatus.agi?callStatus=answered completed,
> > returning 0
> >     -- Executing [2001 at CC:8] Set("SIP/protel-out-0934bb28",
> > "CALLERID(all)=") in new stack
> >     -- Executing [2001 at CC:9] MixMonitor("SIP/protel-out-0934bb28",
> > "1192468625.7.wav|b") in new stack
> >     -- Executing [2001 at CC:10] Dial("SIP/protel-out-0934bb28", "SIP/2001|
> > 20") in new stack
> >     -- Called 2001
> >   == Begin MixMonitor Recording SIP/protel-out-0934bb28
> >
> >
> > 	And here is the output on the new server:
> >
> >  -- Attempting call on Local/0445540881644 at CC2 for 101 at CC:1 (Retry 1)
> >     -- Executing [0445540881644 at CC2:1]
> > Set("Local/0445540881644 at CC2-1a7e,2", "CIDTEMP="1" <5540881644>") in new
> > stack
> >     -- Executing [0445540881644 at CC2:2]
> > Dial("Local/0445540881644 at CC2-1a7e,2", "SIP/protel-out/0445540881644|
> > 25") in new stack
> >     -- Called protel-out/0445540881644
> >     -- SIP/protel-out-09ce0358 is making progress passing it to
> > Local/0445540881644 at CC2-1a7e,2
> >     -- SIP/protel-out-09ce0358 answered Local/0445540881644 at CC2-1a7e,2
> >        > Channel Local/0445540881644 at CC2-1a7e,1 was answered.
> >     -- Executing [101 at CC:1] Answer("Local/0445540881644 at CC2-1a7e,1", "")
> > in new stack
> >     -- Executing [101 at CC:2] AMD("Local/0445540881644 at CC2-1a7e,1", "") in
> > new stack
> >     -- AMD: Local/0445540881644 at CC2-1a7e,1 5540881644 (null) (Fmt: 64)
> >     -- AMD: initialSilence [2500] greeting [1500] afterGreetingSilence
> > [800] totalAnalysisTime [5000] minimumWordLength [100]
> > betweenWordsSilence [50] maximumNumberOfWords [5] silenceThreshold
> > [256] 
> >   == Spawn extension (CC2, 0445540881644, 2) exited non-zero on
> > 'Local/0445540881644 at CC2-1a7e,2'
> >     -- Executing [h at CC2:1] DeadAGI("Local/0445540881644 at CC2-1a7e,2",
> > "agi://localhost/updateCallStatus.agi?callStatus=hangupcc2") in new
> > stack
> >     -- AGI Script
> > agi://localhost/updateCallStatus.agi?callStatus=hangupcc2 completed,
> > returning 0
> >     -- AMD: HANGUP
> >     -- Executing [h at CC:1] DeadAGI("Local/0445540881644 at CC2-1a7e,1",
> > "agi://localhost/updateCallStatus.agi?callStatus=hangup") in new stack
> >     -- AGI Script agi://localhost/updateCallStatus.agi?callStatus=hangup
> > completed, returning 0
> > [Oct 15 12:19:55] NOTICE[5165]: pbx_spool.c:351 attempt_thread: Call
> > completed to Local/0445540881644 at CC2
> >
> >
> > 	When the call gets to AMD it just hangs there until you hangup.  I
> > copied amd.conf to make sure I have the same parameters on both
> > machines.  I simply cannot get AMD to do anything.  The only way to get
> > out of AMD is to hang up the call.  I do not understand why it works on
> > one server but not on the other.
> >
> >   
> > ------------------------------------------------------------------------
> >
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> > ------------------------------------------------------------------------
> >
> > No virus found in this incoming message.
> > Checked by AVG Free Edition. 
> > Version: 7.5.488 / Virus Database: 269.14.7/1062 - Release Date: 10/10/2007 05:11 PM
> >   
> 
> -- 
> My wife's sister is in California.  
> I should buy her a Videophone2008!
> 
> Truly, The Next Best Thing to Being There!
> --
> 
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> 856.380.0894
> 
> 
> 
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