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Panasonic KX-DT543 Intercom Set Key Features

• 3-Line Graphical LCD with Backlighting — 242×55 dot display with 4 adjustable contrast levels; readable in both bright and dimly lit environments
• 24 Freely Programmable Function Keys — Dual-color LEDs (red/green) for real-time line and extension status; configurable for outside lines, DSS, one-touch dial, or feature activation
• Full-Duplex HD Speakerphone — 8-level volume adjustment with enhanced echo cancellation; supports hands-free two-way conversations without audio clipping
• Electronic Hook Switch (EHS) Port — 3.5mm Plantronics-compatible port; enables true wireless headset operation via DECT headsets — no manual hang-up required
• Wideband Compliant Handset — Delivers HD voice quality on internal calls; 6-level volume adjustment; Hearing Aid Compatible (HAC)
• Dedicated Intercom Key — One-press internal calling; LED flashes green on intercom, red on external lines, solid red for message waiting
• Call Log (Incoming & Outgoing) — Review recent call history directly on the display without requiring PBX system access
• Auto Redial — Automatically retries the last dialed number; useful for busy external lines
• Navigator & Cancel Key — Menu-driven interface for phonebook, features, and settings navigation
• 30 Selectable Ringtones (10 Melody Titles) — Customize ring tones by call type for easy identification
• 2.5mm Wired Headset Jack — Secondary headset port compatible with Panasonic RP-TCA400, KX-TCA430, and standard 2.5mm office headsets
• Extra Device Port (XDP / DXDP) — Allows a second digital telephone or accessory to share the same extension line
• KX-DT590 DSS Console Expansion — Supports attachment of one KX-DT590 unit, adding 48 additional programmable keys for large reception or operator setups
• Desk Tilt (2 Positions) + Wall Mountable — Flexible placement; optional wall mounting kit available
• No External Power Required — Powered directly via the PABX extension line (digital loop current)
• Soft Keys (×4) — Context-sensitive soft keys reduce button complexity and simplify feature access