The Yealink SIP-T42U wired IP phone supports up to 12 SIP accounts and features a 2.7-inch backlit LCD screen. Optima HD Voice technology, the Opus codec and Acoustic Shield with intelligent noise filtering help ensure clear voice transmission. Its two Gigabit Ethernet ports support PoE.

It features 6 line keys with LED indicators, programmable for up to 15 DSS keys. The two USB 2.0 ports support USB headsets, call recording and Bluetooth or Wi-Fi connectivity via an adapter. EHS headsets and the EXP43 expansion module are also supported. Features include conferencing for up to 5 participants, BLF, BLA, hot desking, voicemail, auto-provisioning and TLS/SSL security. It is compatible with SIP platforms such as 3CX and Broadsoft Broadworks and can be wall-mounted.

• Type: Wired SIP IP phone
• Colour: Black
• SIP accounts: Up to 12
• Display: 2.7-inch colour LCD, 192 × 64 pixels, with backlight
• Audio technologies: Optima HD Voice, Acoustic Shield and intelligent noise filtering
• Wideband codecs: G.722 and Opus
• Ethernet ports: 2 Gigabit Ethernet
• PoE: Supported
• USB ports: 2 USB 2.0
• Connectivity: Bluetooth, Wi-Fi, Ethernet and USB
• Wi-Fi adapters: WF40 and WF50
• Bluetooth adapters: BT40 and BT41
• Line keys: 6 with LED indicators
• Programmable DSS keys: Up to 15
• Contact directory: Up to 1,000 entries
• Conferencing: Up to 5 participants
• Headsets: Supports USB and wireless EHS headsets
• Expansion: Supports the EXP43 module
• Features: Caller ID, speakerphone, call blocking, BLF, BLA, hot desking, voicemail and auto-provisioning
• Security: TLS/SSL
• Mounting: Desk or wall
• Stand: Two adjustable angles
• Package contents: Handset, Ethernet cable and stand