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 PostsHere are the Two Best VoIP Softphone AppsThree Ways to Revamp Your Business in 2016Polycom SoundPoint IP 321 and 331Polycom SoundStation IP 5000 HD voice