[Freeswitch-users] Voicemail

[Michael Collins]

Bret,

Well done on this post.  This would make an awesome wiki article if it
doesn't already exist.  Let me know if you'd like me to generate some
wiki content based on this email thread...

-MC

> -----Original Message-----
> From: freeswitch-users-bounces at lists.freeswitch.org
[mailto:freeswitch-
> users-bounces at lists.freeswitch.org] On Behalf Of trixter aka Bret
McDanel
> Sent: Tuesday, December 04, 2007 8:55 PM
> To: freeswitch-users at lists.freeswitch.org
> Subject: Re: [Freeswitch-users] Voicemail
> 
> 
> > On Dec 4, 2007, at 9:59 PM, Peder @ NetworkOblivion wrote:
> >
> > > Am I to assume that voicemail requires Cepstral?  I setup a
dialplan
> > > to
> > > test and I get the following debug when the call rolls to
voicemail:
> > >
> There seems to be some confusion about what is going on, so I will try
> to explain on the list for everyone.  :)
> 
> The phrase subsystem allows you to define whether or not you will use
> sound files, TTS or whatever.  This is defined in freeswitch.xml in
the
> section 'phrases'.  You can define the language, which can be changed
> via a channel variable for a particular call, you can define what the
> prompts actually are, etc.
> 
> This offers a great deal of flexibility, and allows proper usage of
> different languages since not all will say things the same way.
> Examples are dates/times (Dutch will use a 24 hour clock, and 'half
elf'
> means 11:30a in English/American for example).  Other things can be
done
> properly, for example "You have 2 messages" in Japnaese cannot use
'ni'
> for 2 since that would be like saying 'two-cycle' in English so you
can
> have proper language sensitive prompts for different languages and
> define what is said via a combination of a module (which provides the
> logic for how to say numbers, counts, currency, dates etc) and XML
which
> defines the actual phrases to be used.
> 
> You are free to use any sound files that you want, subject to the
> licensing terms of those sound files.  They can be in any format that
FS
> understands (based on a format module that provides the capability to
> read and understand a given file format).  There are a couple of
> different modules that provide native (no transcoding), various common
> formats and mp3.  In addition other formats can be supported by adding
> new modules, since the playback parts are abstracted it would require
no
> code changes to any other modules or to the core to add new formats
for
> playback.
> 
> The abstraction layer exists so that you can have different TTS
engines,
> although currently cepstral is the only one that exists - all without
> the things that are going to use it knowing anything specific about
> them, different file formats, again without different parts knowing
> anything specific, etc.
> 
> A tip - if you use mod_xml_curl (the configuration stuff is abstracted
> too :) you can fetch the phrases xml data from a web server as its
> requested so you could make decisions on which one to return based on
> the specific call.  So you could allow for people to have more
selection
> in which voice they get (either set of recordings or TTS) whether they
> use TTS or recordings, what the actual content would be, etc.  This
> allows for a very high level of customization that is generally not
> available in other telephony products (commercial or otherwise).
> 
> Another tip - xml_curl isnt the only way to get config data, a module
> can be written that will pull it from anywhere, any source, and
generate
> the XML data which then gets fed into FS.  xml_curl is a good example
of
> how to do this, and can be used as a reference work for obtaining the
> data from any number of sources.
> 
> 
> > > I uncommented the cepstral line in modules.conf.xml and I get the
> > > following:
> > >
> > > 2007-12-04 21:52:08 [CRIT] switch_loadable_module.c:726
> > > switch_loadable_module_load_file() Error Loading module
> > > /usr/local/freeswitch/mod/mod_cepstral.so
> > > **/usr/local/freeswitch/mod/mod_cepstral.so: cannot open shared
object
> > > file: No such file or directory**
> > >
> In addition to uncommenting it in modules.conf.xml it must be built,
> that error 'no such file or directory' means that it was not installed
> (modules.conf in the main src directory).  In order for it to be
built,
> you have to have libswift.so/dll which is installed as part of a voice
> from cepstral.
> 
> If you get a voice without a license you can use it for testing, it
will
> add a 'nag phrase' saying that it is not registered, but it lets you
> test and play with it, without actually spending anything.  I *think*
a
> single channel license is $20 which will remove the nag message.
> 
> 
> --
> Trixter http://www.0xdecafbad.com     Bret McDanel
> Belfast +44 28 9099 6461        US +1 516 687 5200
> http://www.trxtel.com the phone company that pays you!
> 
> 
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