Re: [OpenSIPStack] Call transfer

[Christian W. <cwa...@gm...>]

Hi,


I also try to do the same and also have the same problems, maybe we doing
something together:

The easiest thing would be to have a library which provides VoIP via CAPI
(like XCAPI) I already have the capi2032.dll running without VoIP.

It can pass the data between different controller and already does PLCI and
controller mapping...

The next step is to provide Line interconnect (you need to mix the data)
Which also needs media conversion (alaw (or whatsoever) 2 pcm 2 alaw)
because the only way I know to mix is on PCM data (also DTMF tone
recognition)...

Kind regards


Christian


-----Ursprüngliche Nachricht-----
Von: ope...@li...
[mailto:ope...@li...] Im Auftrag von
OpenSIPStack Forum
Gesendet: Freitag, 4. Juli 2008 11:50
An: ope...@li...
Betreff: [OpenSIPStack] Call transfer


Hi, 


our firm produces ISDN Pbx under WindowsXP embedded (CPU: Intel Centrino 1,8
GHz, RAM: 1GB). 
The application is written in C++ and uses MFC library.

Our requirements are:

- we need to call a Sip phone connected to our LAN .
- when the phone answer we want to transfer the voice packets received from
it to an isdn line and vice versa, we want to transfer the voice packets
received from the isdn line to the sip phone.
- we can have, at the same time, up to 10 call tranfers of this type.

In practice we are looking for a SIP library that allow us to:
- make a call to a sip phone;
- be notified about call status changes;
- get the voice packets received from the sip phone;
- send voice packets to the sip phone.


We are trying to use OenSipStack but we have some problems. The main is how
to get the packets received from the sip phone. We don't want the packets be
sent  to the sound board but to our application. At the same time we want to
send to the sip phone our packets, not the ones comig from the microphone.


Can anyone help us?

Thank you



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