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SIP-T21PE2 Yealink IP Phone, HD-Voice, 5-line graphical LCD screen and supports 2 VoIP lines Yealink's new SIP-T21P E2 takes entry-level IP phones to a level never achieved before. Making full-use of high-quality materials, plus an extra-large 132x64-pixel graphical LCD with backlight showing a clear 5-line data display, it offers a smoother user...