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

[Luis F Urrea]

Hi All,

I have been working for quite a while in trying to get Openzap to recognize
my country specific busy tone in order to hang up an analog FXO channel.

Basically, I am having FXO disconnect supervision issues and I wanted to
know if it's possible to hang up the FXO by monitoring call progress tones
so that when there is a busy tone the FXO goes on hook.

I have been tweaking the /etc/openzap/tones.conf based on the ITU.T
recommendation E.180 for my country, but so far it doesn't even seem that
the changes I make to the tones.conf file are considered when dealing with
disconnects from the PSTN side.

I restart FS after every change I make to /etc/openzap/tones.conf with no
positive results.

The Openzap Wiki states that the "loadzone" parameter in /etc/zaptel.conf is
not considered when dealing with tones, which makes sense since Openzap
seems to use libteletone for tone detection and generation.

Here is what I use for busy tone on /etc/openzap/tones.conf:

[us]

generate-busy => v=-7;%(330,330,450)
detect-busy => 450

Therefore I set openzap.conf.xml as follows:

 <param name="tonegroup" value="us"/>

I was able to check that the busy tone can be detected using the following
dial plan rule:

   1.      <extension name="Inbound">
   2.            <condition field="destination_number" expression="^1$">
   3.              <action application="answer"/>
   4.              <action application"sleep" data="1000"/>
   5.              <action application="tone_detect" data="busy 450,0 r +100
hangup normal_clearing"/>
   6.            </condition>
   7.          </extension>

So that I answer the FXO and hang up when the busy tone is detected. It
works fine and the FXO port does not get stuck.

Here's the output from the log for the rule above:

http://pastebin.com/f43500bd3

I do not see a reason why settings on tones.conf may not be working?

Is disconnect on busy-detect the default for Openzap? Is it power denial or
battery reversal?

Does it matter if I select fxsks in /etc/zaptel.conf instead of fxsls?

Your help will be greatly appreciated.

Regards,

Luis
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