[Freeswitch-users] Generating calls from external source

Tue Feb 3 08:52:05 PST 2009

On Tue, Feb 3, 2009 at 6:09 AM, Anthony Minessale
<anthony.minessale at gmail.com> wrote:
> There is also an event socket library written in C called esl that is in the
> fs tree in the libs directory.
> This has the ability to establish connections both inbound and outbound from
> FS.
>
> There is also a perl module FreeSWITCH::Client that mr collins may be
> interested in in the tree as well.

As a matter of fact that is the module I used for my outbound IVR
application. It simply handled the communications between my perl
script and my FS instance. The script would read in pre-formatted
originate strings from a text file that had been previously generated
by another application. Then all I had to do was specify how many
concurrent channels that I wanted - kind of like a throttle - and then
I let the script go. I used the "bgapi originate" syntax so that I
wouldn't have to wait to see what happened with each origination
attempt. Then about every second or so I would issue an "oz dump 1"
and parse the results to count how many b channels were in use. If the
number of b channels in use was >= my throttle limit then I'd pause
the script for 1000ms and then issue the oz dump again until the
number of b channels in use had dropped down below my limit. Nothing
too fancy.

You're welcome to review my script, originate syntax, and dialplan
entries if you are interested.
-MC

>
>
> On Tue, Feb 3, 2009 at 7:12 AM, Raul Fragoso <raul at etellicom.com> wrote:
>>
>> In addition do David's suggestion, you probably want to have your
>> application to watch for some specific events after the call is
>> originated and take action based on them. For example, you could watch
>> for the CHANNEL_ANSWER event and play some audio file waiting for some
>> digit, which is generated by the DTMF event.
>> To watch only for those specific events, you should do the following
>> just after authentication (still using Perl as an example, but the
>> mod_event_socket is language agnostic), then you will receive those
>> events from FreeSWITCH through the socket stream:
>>
>> ...
>> print $sock "auth XXX\n\n";
>> print $sock "event plain CHANNEL_ANSWER DTMF\n\n";
>> ...
>>
>> To see a list of available events, please look at the following wiki
>> pages:
>> http://wiki.freeswitch.org/wiki/Mod_event_socket#event
>> http://wiki.freeswitch.org/wiki/Event_list
>>
>> Regards,
>>
>> Raul
>>
>> On Tue, 2009-02-03 at 09:46 +0000, David Knell wrote:
>> > Hi Nik,
>> >
>> >
>> > Here's a snipped in Perl that launches an outbound call:
>> >
>> >
>> > if (my $sock = IO::Socket::INET->new(Proto =>'tcp', PeerAddr =>
>> > '127.0.0.1', PeerPort => 8021)) {
>> > print $sock "auth XXX\n\n";
>> > print $sock "api originate {softivr_id=$siid,src_softivr_id=
>> > $siid,softivr_outdial=true}sofia/frombt/$ntd at 1.2.3.4 $service\n\n";
>> > $sock->close();
>> > }
>> >
>> >
>> > - it does no error checking or anything, but (line by line) it:
>> >  - opens a socket to the event socket interface
>> >  - authenticates
>> >  - issues an originate which dials out to the number in $ntd.  The
>> > bits in {} set a bunch of variables on the channel, which are used by
>> > the software which processes the call later on.  The call is linked to
>> > the extension in $service - FS looks this up in the dialplan - which
>> > handles our end.
>> >  - closes the socket
>> >
>> >
>> > Cheers --
>> >
>> >
>> > Dave
>> >
>> >
>> >
>> > > Thanks for that, coming from a C++ background it's a refreshing
>> > > change to be looking at something that seems logical and efficient.
>> > >
>> > > I'd briefly looked at the event socket and wondered if that was the
>> > > way to go.  I presume that there's some sort of event generation
>> > > that can trigger and external process as well somewhere, though all
>> > > I need to do is update mysql (hopefully using some sort of pooled
>> > > connection)
>> > >
>> > > I'm not using a TDM card, I have a direct interconnect with the PSTN
>> > > breakout provider with 1,500 channels available to me.  I'm finding
>> > > Asterisk proving to be less than stable at high call volumes and
>> > > load values spike at more than 100 calls with billing/accounting in
>> > > place, hence my interest in FS.  The only thing that's concerning me
>> > > is XML at the moment.  Lots of code and very wordy.  I'm sure I'll
>> > > appreciate why XML given time
>> > >
>> > > Regards,
>> > >
>> > >
>> > > ____________________________________________________________________
>> > > From: freeswitch-users-bounces at lists.freeswitch.org
>> > > [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Michael
>> > > S Collins
>> > > Sent: 03 February 2009 01:17
>> > > To: freeswitch-users at lists.freeswitch.org
>> > > Subject: Re: [Freeswitch-users] Generating calls from external
>> > > source
>> > >
>> > > Nik,
>> > >
>> > > Welcome to FreeSWITCH! The short answer is "yes, FS can do that."
>> > > The first thing that you should do is unlearn "the Asterisk way" of
>> > > thinking. Usually there is an elegant way of doing things in FS that
>> > > wasn't possible in Ast.
>> > >
>> > > I would recommend that you start by looking at the event socket,
>> > > which is somewhat analogous to the AMI only cooler. :) I have
>> > > personally done something similar to this using the event socket and
>> > > a Perl script. The key is to learn the syntax of the originate
>> > > command. (definitely hit the wiki and IRC channel)
>> > > Are you using TDM cards for this? Just curious.
>> > >
>> > > -MC (IRC nick: mercutioviz)
>> > >
>> > > Sent from my iPhone
>> > >
>> > > On Feb 2, 2009, at 3:35 PM, "Nik Middleton"
>> > > <nik.middleton at noblesolutions.co.uk> wrote:
>> > > > Hi Guys,
>> > > >
>> > > > As a long time Asterisk user, I'm looking into freeswitch as an
>> > > > alternative mainly due to (list multiple reasons here)
>> > > >
>> > > > Can anyone give me a pointer as to how I would achieve the
>> > > > following?
>> > > >
>> > > > I need to replicate an emergency broadcast system currently
>> > > > running under Asterisk.
>> > > >
>> > > > At the moment, I run through a Mysql database and using the
>> > > > manager API, issues an Originate command to dial a number.
>> > > >
>> > > > When the call is answered, a message is played, and the recipient
>> > > > has the option of hitting a digit to confirm receipt.  I then call
>> > > > an AGI script to update the database.
>> > > >
>> > > > Is this fairly easy to do in Freeswitch?
>> > > >
>> > > > Not looking for code, just some pointers as to what's available to
>> > > > do the above /
>> > > >
>> > > > Regards,
>> > > > _______________________________________________
>> > > > Freeswitch-users mailing list
>> > > > Freeswitch-users at lists.freeswitch.org
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>> > > >
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>> >
>> >
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>>
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>
>
>
> --
> Anthony Minessale II
>
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