click for detailsThe Polycom SoundPoint IP 550 is a four-line SIP desktop phone that brings lifelike richness and voice quality to phone calls.MSRP $355Related PostsPolycom SoundPoint IP 650 6-line HD voicePolycom SoundPoint IP 670 6-line Color UI, HD VoicePolycom SoundStation IP 5000 HD voicePolycom SoundPoint IP 556 4-line HD voice and gigabit PC port