[Freeswitch-users] fax tone detection failed

[Christopher Rienzo]

2100 Hz is the ANS tone from the receiving side of the fax call.  That's
what I detect on my outbound calls.


On Thu, Apr 14, 2011 at 12:57 PM, romon.zaman <romon.zaman at gmail.com> wrote:

>  hello MC,
> you are right..
> before this published here, you help me to get a solution.
>
> actually, my fax machine was not sending standard fax tone.  but it worked
> with actual tone frequency.
>
> so, if someone ever face this problem, recommendation is to get pcap file
> and extract audio file from RTP with wireshark and analyze audio with
> audicity to get exact frequency of tone.
>
> and when u use tone_detect with exact tone frequency, it will work
> perfectly.
>
>
> thanks for  your help
>
>
> ----- Original Message -----
> *From:* Michael Collins <msc at freeswitch.org>
> *To:* FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
> *Sent:* Thursday, April 14, 2011 10:43 PM
> *Subject:* Re: [Freeswitch-users] fax tone detection failed
>
>
>
> On Wed, Apr 13, 2011 at 5:16 AM, romon.zaman <romon.zaman at gmail.com>wrote:
>
>> hi,
>>
>> i am trying to detect fax tone on outgoing calls.
>> here is my javascript code
>>
>> +++++++++++++++++++++++
>>
>> session1 = new
>> Session("{ignore_early_media=false}sofia/gateway/flowroute/"+argv[0]+"");
>>
>> session1.execute("tone_detect", "fax 1100 r +30000 set
>> 'fax_tone_detected=true' 1");
>> msleep(argv[1]);
>> session1.hangup();
>>
>> ++++++++++++++++++++++++
>>
>> i  checked pcap file and  using wireshark , i can hear sone tone on rtp
>> audio playback.
>>
>> but freeswitch cant detect that..
>>
>> is there any other solution to find out specific tone like fax??
>>
>> thanks in advance
>>
>
> Was this the one we talked about yesterday where your fax machine was
> really spitting out a tone around 2096Hz?
>
> -MC
>
>
>
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