P p Packet Loss Packet Scheduler / Queueing Discipline Pairing PBX PCM PCR PEM Periodic Inform §... ... PIN Ping Traffic Policing PoP Port Forwarding PPID PPP PPPoA Prefix delegation §... ... Proxy Page Response Time Server Side PSDN PSTN PTM - Pulse-Time Modulation PTM Priority Point-to-Point Tunneling Protocol Public Key Top ↑