Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] packets drops tail dropped PAM (pulse amplitude modulation) parking calls (IP Phone) partitions (CCM) party lines patterns, ring 2nd payload compression PBX (private branch exchange) migrating from case study connecting routers to digital circuits connecting routers to phone lines optimizing reliability replacing trunks Unity integration PBX-IP Media Gateway (PIMG) PCM (pulse code modulation) 2nd Per Hop Behaviors (PHBs) Perceptual Evaluation of Speech Quality (PESQ) Perceptual Speech Quality Measurement (PSQM) permanent virtual circuit (PVC) PESQ (Perceptual Evaluation of Speech Quality) PHBs (Per Hop Behaviors) phone lines, connecting phone switches PIMG (PBX-IP Media Gateway) ping command plans, dial PoE (Power over Ethernet) policing 2nd 3rd PortFast ports [See also connections] FXO FXS switches Power over Ethernet (PoE) power, inline (IP Phones) PQ (Priority Queuing) Preemption (IP Phone) prerecorded announcements PRI (Primary Rate Interface) prioritizing, voice (QoS) Priority Queuing (PQ) Privacy feature (CCM) 2nd private branch exchange [See PBX] profiles, RED protocols CDP gateways case study H.323 MGCP SIP HSRP 2nd MGCP 2nd components fault tolerance RTP 2nd 3rd SAP SCCP 2nd signaling SIP 2nd SMDI STP VRRP PSQM (Perceptual Speech Quality Measurement) PSTN (public switched telephone network) publishers pulse amplitude modulation (PAM) pulse code modulation (PCM) 2nd pulse dialing PVC (permanent virtual circuit) |