The Auerswald COMfortel D-400 wired IP phone supports 6 SIP lines and features a 3.5-inch color TFT touchscreen with a resolution of 320 × 240 pixels. HD Voice supports a frequency range of up to 7 kHz across the speaker, handset, and headset audio paths. PoE power is supplied in accordance with the IEEE 802.3af, Class 0 standard.

It has 2 Ethernet 10/100/1000 Base-T ports, an RJ45 headset jack with DHSG, and capacity for 2,000 phonebook entries. Features include caller ID, call blocking, an answering machine, and speakerphone, while it supports connecting up to 80 function keys via the D-XT20 module.

• Type: Wired IP phone
• SIP lines: 6
• Display: 3.5-inch color TFT touchscreen
• Display resolution: 320 × 240 pixels
• HD Voice range: Up to 7 kHz
• Ethernet ports: 2 × 10/100/1000 Base-T
• PoE power: IEEE 802.3af, Class 0
• Phonebook capacity: 2,000 entries
• Function keys: Up to 80 via the D-XT20 module
• Headset jack: RJ45 with DHSG
• Features: Caller ID, call blocking, answering machine, speakerphone
• Color: Black