Panasonic NS1000 Manual page 189

Peer to Peer (P2P) Communications.
The NS1000 automatically establishes peer-to-peer communication between peer-to-peer
compatible IP extensions (i.e., NT3xx and UT series) that belong to the same P2P group.
Non P2P Calls require DSP Resource.
NT3xx
P2P Group 1
By using Peer to Peer mode, we can:
- Potentially reduce network wide traffic to the PBX
- Improve voice quality for P2P calls (By using G722 codec – Only supported for P2P
calls) Note: P2P cannot be disabled but, using P2P Group function, phones assigned to different P2P Group can make non P2P calls.
4-1. Peer to Peer (P2P) Communication
Non-P2P Path
NT3xx
P2P Group 2
P2P Path
P2P Path
UTxxx
P2P Group 2
DSP Required
UTxxx
P2P Group 2