A question regarding voice calls

[Dayron Armas Peña]

Hello.
I downloaded and installed Pidgin 2.7.0 on my Windows XP SP3 computer. I did 
this because I read in some place I can't remember that this version 
supports voice calls. Is this true? I ask because after installing and 
configuring it to connect to my gtalk account, it connects without trouble, 
it loads my buddy list, but I can't see any option in any menu to start a 
voice call. If it is possible but I'm missing something that can be solved, 
I have another questions. Could I start or receive a voice call to or from 
another buddy in my list, taking into account that we both are connecting to 
gtalk, but I'm behind a squid proxy? The voice protocol in pidgin works 
point to point or it works through the gtalk server?
I would thank a lot any help.
A Pidgin user.