[Freeswitch-users] Openzap: Analog FXO disconnect supervision. Is it possible to disconnect on busy? is battery reversal the default? is it power denial?

[Anthony Minessale]

you just put the tone_detect app right before the bridge app
you might have to also execute pre_answer to get an early media stream up
into FS

On Tue, Sep 2, 2008 at 5:23 PM, Luis F Urrea <lfurrea at gmail.com> wrote:

> Anthony,
>
> So far I haven't been able to used the tone_detect app with hangup when it
> involves a phone ringing, Could you provide an example of a dialplan rule
> that I could test.
>
> TIA
>
>
> On Tue, Sep 2, 2008 at 4:18 PM, Luis F Urrea <lfurrea at gmail.com> wrote:
>
>> I understand that tone based disconnect could be subject to false
>> disconnects in some cases, being dependent  on the integrity of the analog
>> signal and the proper configuration of tones, however I do feel that the
>> feature is worth the effort, considering how difficult it is to get a Telco
>> to arrange changes of settings on analog lines and being a last resort for
>> this kind of situation.
>>
>> I do know however that this feature is implemented for example on Cisco
>> IOS for analog gateways, Audiocodes gateways and Patton gateways.
>>
>> Cisco IOS and Patton requires one to specify the frequencies and cadence
>> of the tone, Audiocodes provides an application that records the call
>> progress tones and then analyzes the recorded busy signal to be used as the
>> disconnect signal.
>>
>> I used to work at Cisco TAC supporting H323 analog and digital gateways,
>> and in my experience the feature certainly saved the day in many cases after
>> the customer was frustrated in trying to find out what his/her provider
>> implemented on the line.
>>
>> My vote goes for it!
>>
>>
>>
>> On Tue, Sep 2, 2008 at 1:05 PM, Michael Jerris <mike at jerris.com> wrote:
>>
>>> We do have the following patch almost ready to merge:
>>>
>>> http://jira.freeswitch.org/browse/OPENZAP-3
>>>
>>> it could probably be expanded to work for other tones than dtmf, with
>>> the caveats described by tony.
>>>
>>> Mike
>>>
>>> On Sep 2, 2008, at 2:22 PM, Anthony Minessale wrote:
>>>
>>> > Any method besides the tone based ones are supported by whichever IO
>>> > layer you choose.
>>> > For instance if you are using the zt mod (zaptel) then all the low
>>> > level analog signalling will be generated by zaptel for ground loop
>>> > and kewl start etc.
>>> >
>>> > Tone based hangup detection is a higher level concept that could be
>>> > implemented in the core of openzap but would require constant tone
>>> > detection throughout the call and is susceptible to false positives
>>> > etc.
>>> >
>>> > it's not a common feature where I wrote the code from.  I have
>>> > kewlstart lines here and nobody has asked for it and I don't have a
>>> > labbed up example and I only have 2 hands therefore it's not
>>> > implemented.
>>> >
>>> > Like I said using tone_detect in FreeSWITCH with action hangup is
>>> > not any more or less glorious than how the feature would work right
>>> > in openzap so you can use it that way if you want.
>>> >
>>>
>>>
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>>
>>
>
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-- 
Anthony Minessale II

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