Yealink SIP-T73U Ultra Business IP Phone

The standard desk phone in Yealink's current T7 series, the SIP-T73U is the wired workhorse the T43U generation grew into — 12 SIP accounts behind a compact 2.8-inch color screen, built for the everyday desks that make up most of an office. It is the T73W's wired sibling: no built-in radios, just dual Gigabit Ethernet and PoE, with wireless available later through USB dongles if a desk ever needs it.

Eight line keys page out to 40 programmable DSS keys for busy-lamp fields, park slots, and one-touch dials, and the phone cascades up to three EXP55 color expansion modules when a standard desk grows into a light reception position. Audio carries the full T7 treatment: HD handset and speaker, Acoustic Shield, Smart Noise Filtering, and a 3W speaker, with a hearing-aid-compatible handset that uses a Hall switch for a quieter cradle. Under the hood, Linux 6.1 with TEE hardware encryption, secure boot, and unified T7X firmware keeps fleet provisioning and updates simple and consistent with the rest of the series.

Key Specifications

• Part Number: Yealink SIP-T73U (1301012)
• Display: 2.8" 320 x 240 color LCD with backlight; wallpaper, screen saver, dark and light themes
• SIP Accounts: 12
• Line/DSS Keys: 8 line keys with LED, up to 40 programmable DSS keys across 5 pages
• Ethernet: Dual-port Gigabit Ethernet with PoE (IEEE 802.3af); power adapter sold separately
• USB: 1x USB 2.0 (USB headset, call recording, EXP55 expansion modules — up to 3 cascaded; Wi-Fi via WF50 and Bluetooth via BT41/BT51 dongles; EHS40 wireless headset adapter)
• Audio: HD voice (HD handset, HD speaker, 3W), Acoustic Shield, Smart Noise Filtering, full-duplex speakerphone with AEC; wideband G.722 / AMR-WB (optional), narrowband G.711, G.723.1, G.729 family, G.726, iLBC
• Conferencing: 5-way local conference
• Directory: Local phonebook up to 1,000 entries; XML/LDAP remote phonebook
• Security/Platform: Linux 6.1 with TEE hardware encryption, secure boot, TLS 1.3, SRTP, AES 256 configuration encryption, 802.1X; Hall-switch handset; stand with 2 adjustable angles; wall mountable (bracket optional)

What's included: SIP-T73U phone, handset with handset cord, Ethernet cable (2m CAT5E), stand, and quick start guide. Power adapter is NOT included — the T73U runs on PoE from a PoE switch port, or on a Yealink 5V/2A adapter sold separately.

Why Buy From Reef Telecom?

• Brand-new, genuine Yealink
• 10-year warranty on every unit
• Free shipping on orders over $300

Condition

New

Warranty

10-Year Reef Telecom Warranty

Manufacturer Part Number

SIP-T73U

Reef SKU

YEALINK-T73U

Brand

Yealink

Free ground shipping on orders over $300 (contiguous US). Same-day shipping on orders placed before 4 PM EST.

All products include our industry-leading 10 Year Warranty backed by Reef Telecom.