[Freeswitch-dev] Using a modem to connect ordinary phones

[Chris Burns]

I don't know anything about zaptel or supporting a new modem through that 
means. It sounds easier than writing your own driver and endpoint.

However, an endpoint is just a module that implements a 
switch_state_handler_table: 
http://docs.freeswitch.org/structswitch__state__handler__table.html
and switch_io_routines: 
http://docs.freeswitch.org/structswitch__io__routines.html

There is mod_reference in trunk to show you the barebones. Check out its load 
function and you will see it create the endpoint interface and install state 
handler and io routines. I found mod_portaudio is a fairly simple example of 
a working endpoint.

On October 28, 2009 01:37:07 am Alex To wrote:
> Thank you very much for your prompt reply Mike
>
>
>
> The problem is I could simply get everything working by buying a zaptel
> compatible card or a VoIP Gateway. However I would like to use the modem
> that I am developing since it does provides some additional features.
>
>
>
> Does that mean I could start my way reading about Zaptel and develop a
> modified version of Zaptel to control my modem ?
>
>
>
> Thanks for pointing me the way.
>
>
>
> Regards
>
>
>
> Alex To
>
>
>
> From: freeswitch-dev-bounces at lists.freeswitch.org
> [mailto:freeswitch-dev-bounces at lists.freeswitch.org] On Behalf Of Michael
> Jerris
> Sent: Wednesday, October 28, 2009 1:23 PM
> To: freeswitch-dev at lists.freeswitch.org
> Subject: Re: [Freeswitch-dev] Using a modem to connect ordinary phones
>
>
>
> You are better off creating a zaptel driver than re-creating all that work
> that has already been done.
>
>
>
> Mike
>
>
>
> On Oct 28, 2009, at 1:05 AM, Alex To wrote:
>
>
>
>
>
> Hi,
>
>
>
> I found the same topic created 2 years back in Oct 2007 but it doesn't seem
> to have the answer yet.
>
>
>
>  I am quite new to FS and having a hard time reading the documentation.
> Someone could tell me: how would I use a modem and develop an Endpoint in
> FS that I could bridge the call from VoIP to PSTN. I am a hardware
> engineer, I am developing this modem and would want to use it with FS. I
> know that I could simply buy a VoIP Gateway or a zaptel compatible card and
> use OpenZap.
>
>
>
> Could someone point me out the direction for the following matters:
>
>
>
> 1.       I feel that I need to develop an Endpoint module, like mod_sofia,
> mod_iax... that controls my modem so I could bridge the call from VoIP to
> PSTN ? If that is correct, could someone point me the documentation to
> start reading about Endpoint interface .?
>
> 2.       Is there any similar module developed before about controlling a
> modem using AT Command