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| Specifications | KX-DT546 | KX-DT543 | KX-DT521 |
| Display | |||
| LC Display | Graphic | Graphic | Graphic |
| LCD Size (dots WxH) | 242x109 | 242x55 | 60x18 |
| LCD Contrast | 4 levels | 4 levels | 4 levels |
| LCD Backlight | Yes | Yes | Yes |
| Install Option | |||
| Desk mount tilt | Yes (2 positions) | Yes (2 positions) | No |
| Wall mount | KX-A433 (Optional) | KX-A433 (Optional) | KX-A432 (Optional) |
| Dimensions | High: 267x170x180mm Low: 267x187x155mm |
High: 267x170x180mm Low: 267x187x155mm |
205x160x170mm |
| Audio Features | |||
| Handset / Headset volume |
6 levels | 6 levels | 6 levels |
| Handset | Wideband compliant, Hearing Aid compatibility (HAC) |
Wideband compliant, Hearing Aid compatibility (HAC) |
Wideband compliant, Hearing Aid compatibility (HAC) |
| Speaker Phone | Yes (Full Duplex) | Yes (Full Duplex) | Yes (Full Duplex) |
| Speaker phone volume |
8 levels | 8 levels | 8 levels |
|
Bluetooth |
No | No | No |
| Ringtones | 30 | 30 | 30 |
| Ringer Volume | 4 levels + Off | 4 levels + Off | 4 levels + Off |
| Headset port | 2.5mm audio jack | 2.5mm audio jack | 2.5mm audio jack |
| Electronic Hook Switch Control Port (EHS) |
3.5mm Plantronics compatible |
3.5mm Plantronics compatible |
No |
| Keys | |||
| Soft Keys | 4 | 4 | No |
| Programmable Keys | 24 | 24 | 8 |
| 0 9,*,# Keys | Yes | Yes | Yes |
| Navigator & Cancel Key |
Yes | Yes | Yes |
| Features | |||
| Desiless (Soft Labelling Keys) |
No | No | No |
| Auto Redial | Yes | Yes | No |
| Off Hook Monitor | Yes | Yes | Yes |
| Handset / Headset Mic Mute |
Yes | Yes | Yes |
| Outgoing - Incoming Call Log |
Yes | Yes | Yes |
| Melody Ringer | Yes (10 title) | Yes (10 title) | No |
| Connections | |||
| DSS Console (KX-DT590) |
Yes | Yes | No |
| External Expansion | 1 DXDP port | 1 DXDP port | 1 DXDP port |
| DSS Console | KX-DT590 | ||
| LCD | No | ||
| Keys | 48 | ||
| Connection DLC Port | DLC Port | ||
| Installation Desktop (1 position) |
Wall mount | ||
| Dimension | High: 137x161x135mm Low: 137x183x114mm |
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