Polycom SoundPoint IP 550 4-line HD voice hartsook 12 years ago click for details The Polycom SoundPoint IP 550 is a four-line SIP desktop phone that brings lifelike richness and voice quality to phone calls. MSRP $355 Related PostsWindows 10 – Start Me Up?Fiber Internet for just $185 in the East Bay!Telnexus March 14 & 15 Outage ReportTelecommunications Engineer (berkeley)