Addcaller Confbrigde

Dear all,

i’m configuring an audioconference platform using Confbrigde.
I have found very interistin this menu option:

*3=dialplan_exec(addcaller,1,1)
3,dialplan_exec(addcaller,1,1)

In the extensions.conf i have added:

[addcaller]
exten => 1,1,Originate(SIP/otherpeer,exten,conferences,100,1)

[conferences]
exten => 100,1,ConfBrigde(1234)

In this case the users join always the conference 1234.
I would like to configure dynamically the system, if i’m in the conference 1265 and i press *3 i would like to set the parameter with the correct conference number.
Is it possible?

Thanks and best regards,
Davide