asterisk users - Apr 2005 - Questions about ongoing calls

Two questions. 

If there is a VoIP-VoIP call, how do I see from a console what codecs are in
use by peers? 

Second question: if there is transcoding going on, how do I see detailed
information about it - peers involved, extensions, IP addresses, ports,
codecs from/to and so on?

Thanks,
Irakli