[asterisk-users] how to return a transfered call to the transferrer?

[Ethy H. Brito]

On Thu, 16 Jul 2015 09:51:54 +0100
Ishfaq Malik <ish at pack-net.co.uk> wrote:

> On 15 July 2015 at 20:51, Ethy H. Brito <ethy.brito at inexo.com.br> wrote:
> 
> >
> > Hi all
> >
> > Any of you guys could point me in the right direction?
> >
> > I need to make that a blind transfer to return to the transferrer when the
> > transferee does not answer.
> >
> > Scenario:
> >         . Miss Jane Doe, our front desk attendant, picks up an external
> > call to
> >         Mr. Smith;
> >         . Miss Doe flashes, dial Mr. Smith's extension and then hangup;
> >         . Mr Smith's phone rings until timeout;
> >         . At this point, how to return the call to the Miss Doe's
> > extension;
> >
> > Cheers
> >
> > Ethy
> >
> > --
> > _____________________________________________________________________
> >
> >
> Do a channel dump on the transferred channel, you'll see marker channel
> variables showing it's a transfer and that contain the sending peer name.
> You can use dialplan logic to check if it's a transfer. If it is, you can
> send the call back to the referrer peer.
> 

I'm sorry. I couldn't find "channel dump" (Asterisk 11).

The closer I got was "sip show channel XXX".
And it does not return any clue about a transferred channel. 
At least none I could rely on.

Isn't there any dialplan variable? Other tip?

Cheers

Ethy