I am using Jabber 11.9 and it seems that it doesn't support blind transfer. I am not sure if the term is correct, but what I am trying to do is while on the phone with 1000 pressing the Conf. button, dial the number I want to add in conf. call e.g. 2000, and while it is still ringing press the Conf. button again. This way me and the 1000 are in a call and as soon as 2000 pics up they are in the conference. This is working with CIPC, but looks like not in Jabber.
Do you know if later Jabber versions have this option?
Similar was the situation with blind transfer I believe, but in 11.9 you can do blind transfer with Jabber.