Specification/Model | X1S X1SP | X3S (New Version) X3SP (New Version) | X3SG (New Version) | X3U | X4U | X5U | X6U |
LCD | 128×48 Dot-matrix with back light | 320×240 2.4” color display | 320×240 2.8” color display | 320×240 2.8” color display | 320×240 2.8” color display | 480×320 3.5” color display | 480×272 4.3” color display |
Side Display | X | X | X | X | 2.4-inch 320 x 240 color display | 2.4-inch 320 x 240 color display | Two 2.4-inch 320 x 240 color display |
DSS Keys on the Side Display | X | X | X | X | 6 | 6 | 12 |
Lines | 2 | 4 | 4 | 6 | 12 | 16 | 20 |
Line Keys | 2 | 2 | 2 | 3 | 3 | 4 | 5 |
Local Phone Book | 1000 | 500 | 1000 | 1000 | 1000 | 2000 | 2000 |
Call Logs | 600 | 600 | 600 | 600 | 1000 | 1000 | 1000 |
IPv6 | √ | X | √ | √ | √ | √ | √ |
Harman Speaker | X | X | X | X | √ | √ | √ |
Wideband Codec | G. 722, Opus | G. 722 | G. 722, Opus | G. 722, Opus | G. 722, Opus | G. 722, Opus | G. 722, Opus |
Bluetooth | X | X | X | X | via Bluetooth Dongle | Built-in Bluetooth | Built-in Bluetooth |
WiFi | X | X | X | X | via WiFi Dongle | via WiFi Dongle | via WiFi Dongle |
PoE | X1S × X1SP √ | X3S × X3SP √ | √ | √ | √ | √ | √ |
Network | 10/100 Mbps | 10/100 Mbps | 10/100/1000 Mbps | 10/100/1000 Mbps | 10/100/1000 Mbps | 10/100/1000 Mbps | 10/100/1000 Mbps |
EHS Headset | √ | √ | √ | √ | √ | √ | √ |
Wall Mounting | √ | √ | √ | √ | √ | √ | √ |
Foot Stand | 2 adjustable angles of 45 and 50 degrees | 2 adjustable angles of 45 and 50 degrees | 2 adjustable angles of 45 and 50 degrees | 2 adjustable angles of 45 and 50 degrees | 2 adjustable angles of 45 and 50 degrees | 2 adjustable angles of 45 and 50 degrees | 2 adjustable angles of 45 and 50 degrees |