The Zultys Z 23GE is the sweet-spot Gigabit phone in the Zultys lineup — 14 programmable soft keys with LCD labels, a 320x240 color display, built-in Bluetooth, and dual Gigabit Ethernet. It gets bought for the bulk of staff at offices on Zultys MX who want color and modern features without paying for the executive-tier 47GE or 49GA. HD audio quality is solid on both handset and speakerphone, and 5-way conferencing handles small huddle calls without needing a bridge. The LCD-labeled keys are the hidden upgrade — when you re-program a key, the label changes on screen, so you don't end up with handwritten Post-its on the bezel. EHS-supported headset port plus Bluetooth means wireless headsets work cleanly. The thing buyers regret: not realizing 14 keys is the cap. If your receptionist needs 20+ BLF lines, jump to the ZIP 45G or 47GE, or add an expansion module-equipped phone instead. Like the rest of the Zultys family, this is for Zultys MX systems and the ZAC UC app — don't buy it for a generic SIP environment expecting full feature parity.