[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]

I didn't say I needed to be convinced to add it. I said I needed the time
and resources to work on it.  Everyone else on your list of who supports
this feature is a commercial product.  We don't actually get much out of the
deal being FREE switch and all.  It's certainly on the list of features we
intend to add I just don't know when it will be added.  Again you can
configure FreeSWITCH to do the same thing with the tone_detect app as you
have already demonstrated so it's not exactly a high priority issue at the
moment.

I'm sure you will see it added at some point.




On Tue, Sep 2, 2008 at 5:18 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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-- 
Anthony Minessale II

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