asterisk users - Jun 2006 - Dial(ZAP with t option for call transfer via *2)

Hi all,

using asterisk 1.2.9.x I would like to forward an incoming call to
an outbound ZAP target (EuroISDN PRI via Digium TE410P),
i.e. an mobile phone.

exten => 105,1,Dial(Zap/r1/0171234567,120,rt)

I use the Dial() option t
as the goal is to enable the called destination to be able to perform
a attended call transfer via *2 to another extension of the PBX.

But asterisk doesn't seem to screen the outbound leg of type Zap channel
for *2 - it is just ignored.

Using a SIP - Target in the above Dial() statement
the reached target is able to use *2.

What is the current status of this feature in asterisk?
What is needed to make it work with Zap-Channels ??

features.conf
[featuremap]
atxfer => *2                    ; Attended transfer

TIA,
Bruno
--
bruno@ic3s.de