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Yealink SIP-T73U Ultra Business IP Phone

Yealink SIP-T73U Ultra Business IP Phone

A wired desk phone with a 2.8 inch color screen and up to 12 SIP accounts. Eight line keys with LED status make transfers and pickups quick, and you can add up to 40 shortcut keys across five pages. It powers over the same network cable as your data (PoE), so setup stays tidy. Kloud 7 provisions it for your hosted voice service, so it works the moment it is plugged in.

Product Details

The Yealink SIP-T73U is a wired business IP phone from Yealink’s new T7 series, launched in November 2025 to replace the older T4 and T5 generation on US desks. It pairs a 2.8 inch color display with 12 SIP accounts, eight LED line keys and dual Gigabit ports, so a busy desk gets fast networking and clear call status without extra hardware. Kloud 7 ships it provisioned for your hosted voice service, so it registers to your extensions, directory and call routing straight out of the box. Call Kloud 7 on (844) 855-6837 or contact our team for pricing, lead times and a quote.

Display type
2.8-inch color LCD with backlight (320 x 240 resolution); stand with 2 adjustable angles
VoIP Features
Up to 12 SIP accounts; 8 line keys with LED indicators; up to 40 DSS keys over 5 pages; IETF SIP (RFC 3261 and companion RFCs)
Audio codecs
Wideband: G.722, AMR-WB (optional). Narrowband: G.711 (PCMU and PCMA), G.723.1, G.729, G.729A, G.729B, G.729AB, G.726, iLBC, AMR-NB (optional)
Audio Features
Yealink Ultra HD Voice (HD handset and HD speaker); Acoustic Shield; Smart Noise Filtering; full-duplex hands-free speakerphone with AEC; 3W speaker
Wireless
No built-in wireless. Wi-Fi is added with the Yealink WF50 USB dongle and Bluetooth with the BT41 or BT51 USB dongle (both sold separately)
Ports
2 x RJ45 10/100/1000 Mbps (Gigabit) Ethernet ports; 1 x USB 2.0; 1 x 5V power port; security keyhole
Headset Ports
1 x RJ9 (handset); 1 x RJ9 (headset); USB headset support; EHS via the Yealink EHS40 adapter; Bluetooth headset with the BT51 USB dongle
Power
PoE (IEEE 802.3af, Class 2) or optional AC adapter (DC 5V/2A, sold separately)
Expansion
Yealink EXP55 color expansion module (5.5-inch 480 x 960 color LCD, 26 keys per page over 3 pages for 78 programmable keys). Daisy-chain up to 3 modules per phone for up to 234 programmable keys.
Platform
Linux 6.1 with TEE hardware encryption and dual-system firmware recovery; hearing aid compatible (HAC) handset; Hall switch hook; wall mountable
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