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Yealink SIP-T73U Gigabit IP Phone with 2.8-Inch Color Display and 12 SIP Lines for Enterprise VoIP

Name: Yealink SIP-T73U Gigabit IP Phone with 2.8-Inch Color Display and 12 SIP Lines for Enterprise VoIP
Brand: Yealink
SKU: Custom-Yealink-SIP-T73U

Brand Yealink

Model Number SIP-T73U

Manufacture Warranty 1 Year

EpicRise Warranty First Year

Product Highlights

• 12 SIP account registrations with dual gigabit Ethernet ports enable high-density line management for busy office environments

• 2.8-inch color LCD display with 320x240 resolution and dual theme support provides clear visual navigation and call information

• 40 programmable buttons across five pages plus expansion support for up to 3 EXP55 modules deliver 274 total programmable keys

• HD voice with Acoustic Shield and Smart Noise Filtering technologies ensure crystal-clear audio quality on calls

• TEE hardware encryption, TLS 1.3, and three-layer security architecture protect sensitive enterprise communications

• PoE IEEE 802.3af support and USB 2.0 port enable flexible deployment with headsets, recording, and wireless adapters

Overview
Specifications
FAQ
User Guides
Reviews

The Yealink SIP-T73U is an enterprise-grade IP phone designed to meet the demanding communication needs of modern businesses. Built on Linux 6.1 with TEE hardware encryption, it delivers professional-grade performance with robust security features including TLS 1.3, SRTP media protection, and a three-layer security architecture. The phone's Hall switch technology provides a quieter office environment, while its redesigned slim profile matches contemporary workplace aesthetics.

Supporting up to 12 SIP accounts with dual gigabit Ethernet connectivity, the T73U handles high call volumes without network bottlenecks. The 2.8-inch color display presents call information clearly, and the extensive programmability—40 onboard keys, 274 total programmable keys with EXP55 modules—streamlines operations for receptionists, call center agents, and power users. HD voice codec support, combined with Acoustic Shield and Smart Noise Filtering, ensures exceptional audio clarity for every conversation.

Wide compatibility with leading platforms like 3CX, Broadsoft, and Broadworks, plus unified firmware across the T7 series, simplifies IT management and deployment at scale. PoE support reduces cabling complexity, while the USB 2.0 port enables connection of headsets, wireless adapters, or storage devices for call recording.

Best For

The SIP-T73U excels in enterprise environments requiring high-capacity line management, programmable call handling, and secure communications:

- Corporate reception desks where operators manage multiple lines and need instant access to directory contacts and transfer functions through programmable DSS keys

- Call center supervisor stations requiring monitoring of agent lines, quick conference setup, and expansion modules for extensive presence visualization

- Executive offices demanding secure encrypted communications, professional audio quality, and integration with USB headsets for all-day comfort

- Financial and healthcare institutions where TLS 1.3 encryption, secure boot, and configurable security policies meet compliance requirements

- Professional services firms deploying standardized VoIP systems across multiple offices using 3CX, Broadsoft, or similar platforms

Key Features

- 12 SIP account registrations support high-density line assignments for receptionists, shared lines, or departmental routing

- Dual gigabit Ethernet ports with PoE IEEE 802.3af eliminate network bottlenecks and simplify installation without separate power adapters

- 40 programmable buttons across five pages, expandable to 234 total keys with three EXP55 modules cascaded via USB

- HD voice codecs (G.722, AMR-WB) with 3W speaker, Acoustic Shield, and Smart Noise Filtering deliver crystal-clear audio

- 2.8-inch color LCD (320x240 pixels) with backlight and dual theme support provides clear visual feedback for calls and contacts

- TEE hardware encryption, TLS 1.3, SRTP, and three-layer security architecture (core integrity, network defense, transmission security) protect enterprise communications

- USB 2.0 port supports headsets, Wi-Fi/Bluetooth/DECT adapters, local call recording to USB storage, and EXP55 expansion modules

- Dual system backup function allows rollback if firmware upgrade fails, ensuring enterprise-grade reliability

Quick Specs

Display	2.8-inch color LCD, 320x240 pixels, backlight, dual theme support
SIP Accounts	12 registrations
Network	Dual gigabit Ethernet (RJ-45), IPv4/IPv6
Keys	8 line keys with LED, 40 programmable buttons (5 pages), 4 soft keys, expandable to 234 with EXP55 modules
Audio Codecs	HD: G.722, AMR-WB; Narrowband: G.711µ/A, G.729, G.723.1, G.726, iLBC, AMR-NB
Audio Features	HD handset/speaker, 3W speaker, HAC handset, Acoustic Shield, Smart Noise Filtering, full-duplex speakerphone with AEC
Interfaces	2x RJ-45 gigabit, 2x RJ-9 (handset/headset), 1x USB 2.0, 1x DC 5V power
Power	PoE IEEE 802.3af (Class 2) or AC adapter 5V/2A; consumption 1.30-1.48W (PSU), 1.368-1.832W (PoE)
Security	TEE hardware encryption, TLS 1.3, SRTP, AES256 config encryption, secure boot, OpenVPN, IEEE 802.1X, WPA2/WPA3
Protocols	SIP v1/v2, SRTP, LLDP/CDP, QoS (802.1p/Q, DSCP), RTCP-XR, ICE, STUN
Compatibility	3CX, Broadsoft, Broadworks, and major SIP platforms
Expansion	Up to 3x EXP55 modules (78 keys each, 234 total)

Product Details
Color	Black, Gray
Connection Type	Ethernet, USB
Power Source	AC-powered, DC-powered

What type of office environment is the Yealink SIP-T73U best suited for?

The T73U is designed for enterprise environments requiring multi-line management and programmable call handling. Reception desks, call center supervisor stations, and executive offices benefit from its 12 SIP account capacity, 40 programmable keys, and expansion capability to 234 keys. The HD voice quality and encryption features make it appropriate for financial, healthcare, and professional services firms.

How does the T73U compare to other Yealink T7 series models when deciding which to purchase?

The T73U sits in the mid-to-upper range of the T7 series with 12 SIP accounts and 40 programmable keys. It provides greater line capacity than entry models while maintaining a compact footprint compared to higher-end variants with built-in expansion screens. The USB 2.0 port allows connection of up to 3 EXP55 modules for organizations needing extensive presence management without upgrading to a larger desktop device.

Is the T73U worth the investment compared to lower-cost IP phones?

The T73U justifies its price point through 12 SIP account support, gigabit Ethernet, TEE hardware encryption, and expansion to 234 programmable keys. Organizations requiring multi-line capacity, security compliance (TLS 1.3, SRTP, secure boot), and extensive call appearance monitoring gain operational efficiency that budget models cannot provide. The dual system backup and unified T7 firmware also reduce long-term IT management costs.

Which VoIP platforms and headset types are compatible with the SIP-T73U?

The T73U is certified compatible with 3CX, Broadsoft, and Broadworks platforms and supports standard SIP v1/v2 protocols for broad platform compatibility. The RJ-9 headset jack accommodates analog headsets, while the USB 2.0 port enables plug-and-play connection of USB headsets, Yealink Wi-Fi/Bluetooth/DECT adapters, and EXP55 expansion modules. The phone supports EHS (electronic hook switch) for compatible wireless headsets.

What power options does the T73U support and what is the power consumption?

The T73U supports PoE IEEE 802.3af (Class 2) for single-cable installation, or an AC adapter with 100-240V input and 5V/2A DC output. Power consumption is 1.30-1.48W when using the AC adapter, or 1.368-1.832W when powered via PoE. PoE deployment eliminates the need for wall outlets at each desk location.

How many expansion modules can be connected and what is the total key capacity?

The T73U can cascade up to 3 EXP55 expansion modules via the USB 2.0 port. Each EXP55 provides 78 programmable keys across three display pages, totaling 234 additional keys when all three modules are connected. Combined with the phone's 40 onboard programmable buttons, this enables extensive directory contacts, BLF monitoring, and speed dial access.

What security features does the T73U provide for enterprise communications?

The T73U implements a three-layer security architecture: core integrity (TEE hardware encryption, secure boot, firmware signing), network defense (802.1X authentication, WPA3, OpenVPN, content security policy), and transmission security (TLS 1.3, SRTP media encryption, AES256 config file encryption). The Linux 6.1 base with Trusted Execution Environment provides enterprise-grade protection from boot through operation.

What audio quality technologies are included in the T73U?

The T73U features HD voice codecs (G.722, AMR-WB), a 3W speaker, HD handset and speakerphone, Acoustic Shield technology, and Smart Noise Filtering. The full-duplex speakerphone includes AEC (acoustic echo cancellation), and the handset is HAC (hearing aid compatible). Voice processing includes VAD, CNG, PLC, AJB, and AGC for clear communications.

Regular price: $128.00
Sale price: $128.00
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