[asterisk-users] Tweaking AMD in Asterisk

[Tino]

Hi Aurimas,

Thanks for your thoughts on this.  Can you please let me know how playing a
silent audio file before AMD will help to tweak the parameter values.

On Wed, Aug 4, 2010 at 8:30 PM, Aurimas Skirgaila <a.skirgaila at gmail.com>wrote:

> Hi,
>
> the basic settings are pretty good ones. What I did to do improve the
> performance and prevent the false positives, I started to recorded every
> call, and analyzed every incorrect detection :) Fairly soon I came with
> optimal set for my environment:
>
> initial_silence            = 2500
> greeting                   = 1500
> after_greeting_silence     = 300
> total_analysis_time        = 5000
> min_word_length            = 120
> between_words_silence      = 50
> maximum_number_of_words    = 4 ; it's usuall to pickup saying "Jon
> Anderssen, hello" in here
> silence_threshold          = 384
>
> by the way, for outgoing SIP calls you might want to do this Background
> trick as it helped me a lot regarding AMD on SIP.
>
> exten => _X.,n,Background(blank_audio)
> exten => _X.,n,AMD
>
>
> On Wed, Aug 4, 2010 at 5:08 PM, Tino <tino at sparksupport.com> wrote:
>
>> Hello ,
>>
>> I would like to tweak my Answeing Machine Detection (AMD) in Asterisk. My
>> current values are
>>
>> AMD(2500|1500|300|5000|120|50|5|256)  and  we were able to identify approx
>> 25-30 % of all answering machines.
>>
>> Anybody have any suggestion to improve the accuracy of AMD.
>>
>> Thanks
>>
>>
>>
>>
>> --
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>
>
>
> --
> Mvh,
> Aurimas Skirgaila
>
> --
> _____________________________________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
> New to Asterisk? Join us for a live introductory webinar every Thurs:
>               http://www.asterisk.org/hello
>
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> To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
>
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