Grandstream GXP1630 Entry Level SIP IP PhoneThe GXP1630 comes equipped with a suite of VoIP features that are deployed in a clear and easy to use fashion. Focused primarily for low to medium call volumes and efficient call handling, its 3 line SIP account design and 8 dual colored BLF speed dial keys gives this versatility. The GXP1630 also supports the best possible connection speeds and call quality with its dual Gigabit ports and HD audio on both speakerphone and handset. With other features