asterisk users - Jul 2006 - transfers from an E1 using 2b-channel or similar anyone? (QSIG?)

Hi all,
Here is the situation:

A call comes in to an Alcatel PBX and it sends it to an E1 on * ,   this 
* either sends the call to a VoIP extension or needs to forward it to an 
extension back on the Alcatel,  but WITHOUT using another slot of the 
E1  (no tromboning or hairpinning).

I've read you can do this with 2b channel transfers implemented on 
5ESS,     and also on QSIG.
I know Matthew Fredrickson did it on *  (I think he programmed it for *)

I also know there is quite a bit of people pursuing this same goal,   
which is way important to lower the income barriers for * to enter the 
legacy world.

Has anyone actually done it?     I appreciate any input whatsoever,  and 
if possible a sample of how to manage it on *.    What to put on the 
extensions.conf to perform the transfer and any other files needed,

thanks

On Jul 25, 2006, at 12:53 PM, Manrique Feoli wrote:
> Hi all,
> Here is the situation:
>
> A call comes in to an Alcatel PBX and it sends it to an E1 on * ,   
> this * either sends the call to a VoIP extension or needs to forward 
> it to an extension back on the Alcatel,  but WITHOUT using another 
> slot of the E1  (no tromboning or hairpinning).
>
> I've read you can do this with 2b channel transfers implemented on 
> 5ESS,     and also on QSIG.
> I know Matthew Fredrickson did it on *  (I think he programmed it for 
> *)
>
> I also know there is quite a bit of people pursuing this same goal,   
> which is way important to lower the income barriers for * to enter the 
> legacy world.
>
> Has anyone actually done it?     I appreciate any input whatsoever,  
> and if possible a sample of how to manage it on *.    What to put on 
> the extensions.conf to perform the transfer and any other files 
> needed,
>
Unfortunately, I have not implemented the Q.SIG version of 2b channel 
transfer, so for the time being you'll have to stick to hairpinning the 
legs of the call.  The Q.SIG version is a little bit more complicated 
than some of the other versions.

Matthew Fredrickson