A PGCP conversation is a group of flows that are grouped based on the call that they belong to. A voice call typically has four flows—an RTP and an RTCP flow in the forward direction, and an RTP and an RTCP flow in the reverse direction. If the PGC does not create RTCP flows, the call has two flows—an RTP flow in each direction.
You can view PGCP conversations with the show services pgcp conversations command. You can view information for all PGCP conversations, or you can include keywords to limit the number of conversations displayed or to display conversations for a particular: