[Freeswitch-users] Questions on Building an application for FreeSWITCH

Phone phone.bytes at gmail.com
Wed May 26 08:59:30 PDT 2010 

Thanks to all for the most helpful feedback.  Sharing your approaches 
and experiences are a big help.  I look forward to the upcoming code 
samples.

I was coming from a windows/dialogic environment where I used a library 
that allowed me to work on a little higher level.  For example, I had a 
call to "play a file" that took a parameter of whether or not to allow a 
dtmf to interrupt.  There was also a call to "ReadDtmfs" that took 
parameters to specify the number of Dtmf's to read, how long to wait for 
them, and what terminating character to use.  I guess that you could 
write some scripts or compiled code with these same types of functions 
to simplify some of these routine tasks with reusable code?

Also, the library handled the threading and scheduling with the OS.  I 
am still unclear on handling the events.  I guess you have a big loop 
reading events and then acting on them using the uuid to determine which 
call it is and how to deal with the next step of the call?  Any feedback 
on this part of the project?

Again, Thanks!

Bob Coleman wrote:
> Ah sorry, I started with the esl to get an understanding then wrote my
> own socket library(was actually very easy to do), when I mean docs I
> mean the event socket docs. I still think of it as the esl, my
> mistake.
>
> http://wiki.freeswitch.org/wiki/Event_Socket
>
> I started with a codeplex project, that had been abandoned, and then
> once I understood the structure of the event socket language, was able
> to rewrite it to better handle what we were doing.
>
> I also married it up to an old gotdotnet asterisk fast agi project,
> once again abandoned, to allow for the use of asterisk as well, but in
> the end freeswitch won because we could use just one platform.
>
> I am busy writing a small sample app at the moment to demonstrate a
> problem I am trying to solve. Can release that code once sorted. Will
> be in a week or so. Am intending it as a quick way of testing event
> sockets, and trying various commands etc. before commiting to coding
> something.
>
> Bob
>
> On Wed, May 26, 2010 at 2:26 PM, Jan Berger <jan.berger at video24.no> wrote:
>   
>> Hi,
>>
>> Do you have some sample code you could share + what docs did you look at?
>>
>> I would like to write and test some C# using ESL for my own work.
>>
>> Jan
>>
>> -----Original Message-----
>> From: freeswitch-users-bounces at lists.freeswitch.org
>> [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Bob
>> Coleman
>> Sent: 26. mai 2010 04:07
>> To: freeswitch-users at lists.freeswitch.org
>> Subject: Re: [Freeswitch-users] Questions on Building an application for
>> FreeSWITCH
>>
>> We used c# as the rest of our systems are windows based. The language
>> doesnt matter too much, as long as you know where you are headed, what
>> performance you require, and what platform you are going to be using.
>>
>> Found the ESL so much easier than the dialogic c library we were using.
>>
>> The docs for the esl are easy to understand, the thing I couldnt get
>> my head around initially was the dialing out, with the dialogic you
>> are in the middle when you dial, ie already on the channel, but with
>> freeswitch you are kind of the third party when you dial, the channel
>> being created by the dialing and handing it off to be worked on. We
>> make the call via an inbound event socket and hand it off to an
>> outbound event socket application via the dialplan.
>>
>> On Wed, May 26, 2010 at 10:08 AM, Phone <phone.bytes at gmail.com> wrote:
>>     
>>> Thanks for the info.  What language did you use?
>>>
>>> Bob Coleman wrote:
>>>       
>>>> Have just recently completed a project to convert an old windows
>>>> dialogic application(vb6) to FreeSWITCH, would reccommend using the
>>>> ESL, was able to map the old dialogic calls to the ESL calls pretty
>>>> easily. We used a mixture of inbound and outbound sockets, as we have
>>>> people dialing us, not just dialing out etc.
>>>>
>>>> With the dialogic you open a port and make the call and handle the
>>>> dtmf, with freeswitch you create a socket connection to FreeSWITCH to
>>>> dial the number and then hand it off to an extension for processing
>>>> the dtmf(that is one approach any way)
>>>>
>>>> Bob
>>>>
>>>> On Wed, May 26, 2010 at 6:45 AM, Michael Collins <msc at freeswitch.org>
>>>>         
>> wrote:
>>     
>>>>> On Tue, May 25, 2010 at 11:38 AM, Jan Berger <jan.berger at video24.no>
>>>>>           
>> wrote:
>>     
>>>>>> Actually - before you get "to smart" - may I suggest that you start
>>>>>> writing
>>>>>> - or improving - the getting started sections of the doc. Address the
>>>>>> areas
>>>>>> where you struggle and let others benefit from your work.
>>>>>>
>>>>>> I have been through similar issues myself - FS is one of the easier
>>>>>> projects
>>>>>> to work with once you get under the hood, but you basically need to
>>>>>>             
>> evolve
>>     
>>>>>> to the level where you read the source code.
>>>>>>
>>>>>>
>>>>>>             
>>>>> And if you can wait 2+ months for "the book" then that should help as
>>>>>           
>> well.
>>     
>>>>> :D
>>>>> -MC
>>>>>
>>>>>
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>>>>>
>>>>>           
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>
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