Yealink T74LTE 4G LTE VoIP/SIP Desk Phone

The Yealink T74LTE 4G LTE VoIP/SIP Desk Phone is a versatile business communication terminal engineered for modern office setups, remote sites, pop-up locations, and hybrid work environments. By integrating standard VoIP capabilities with cellular 4G VoLTE connectivity, the T74LTE removes reliance on physical Ethernet cabling and fixed broadband infrastructure. Inserting a nano SIM card automatically provisions the phone’s IMS account, enabling rapid deployment wherever cellular coverage is available.

Featuring a 4.3-inch TFT colour display, Linux 6.1 operating system, built-in Bluetooth 5.0, dual-band Wi-Fi, and Yealink Optima HD Voice technology, the T74LTE provides flexible connectivity and acoustic performance.

High Convergence of VoIP and VoLTE Technology

The Yealink T74LTE bridges traditional IP telephony with cellular networks. Unlike standard mobile phones, it combines VoIP functionality with VoLTE over cellular data networks to maintain standard desktop features. The unit supports up to 16 accounts in total, including 1 IMS account dedicated to 4G LTE operation and 15 SIP accounts for standard IP-PBX connections. It retains full access to enterprise call handling functions such as Busy Lamp Field (BLF), call parking, call pickup, centralized call recording, call forwarding, and 6-way local audio conferencing. Running on a reliable Linux 6.1 operating system, the T74LTE automatically registers and activates its IMS account upon power-up, streamlining complex site deployments.

Flexible 4G Wireless Deployment and Rapid Setup

Designed specifically for locations where fixed Ethernet cabling is unavailable, cost-prohibitive, or temporary, the T74LTE delivers instant desk phone access over mobile cellular infrastructure. The device operates across comprehensive 4G LTE frequency bands, including Band 1, Band 3, Band 7, Band 8, Band 20, Band 28, and Band 38. Its zero-cabling architecture eliminates the need for local LAN infrastructure or internet routing hardware, requiring only a standard local power connection. Users can also send and receive text messages directly through the on-screen menu interface while retaining full support for emergency calling capabilities such as E911.

Connectivity and Network Redundancy Backup

The T74LTE provides multiple guarantees for your business communications through wired, wireless, and 4G network backup. Primary calls can run over 4G LTE VoLTE via the built-in nano SIM card slot. Additionally, built-in dual-band 2.4GHz / 5GHz Wi-Fi and a 100M Ethernet port allow you to connect via local wireless or wired networks. This ensures you can maintain continuous VoIP communications via Wi-Fi or Ethernet even in environments where the 4G cellular signal is unavailable or drops.

Crystal-Clear HD Audio Performance

The Yealink T74LTE incorporates advanced audio technologies, including Smart Noise Filtering, Optimised Acoustic Shield, and intelligent Audio Enhancement, to isolate your voice and actively block out distracting background noise. Supported by Yealink Optima HD Voice technology and a high-performance 3W Speaker, it provides professional-grade loudness, exceptional voice enhancement, and clear sound quality across all your business calls. To guarantee broad compatibility and accessibility, the phone supports a wide array of high-definition audio codecs (including Opus, EVS, and AMR-WB) and comes equipped with a Hearing Aid Compatible (HAC) handset.  

Sleek Modern Design & Intuitive User Interface

The Yealink T74LTE introduces a contemporary, fashionable design featuring a slimmer profile, integrated line keys, and touch-sensitive control buttons crafted to complement any modern office environment. Engineered for comfortable, all-day operation, the phone delivers a refined tactile feel from the moment you begin using it.  The crisp 4.3-inch TFT colour display offers quick visual access to contacts, call status, and custom wallpapers. Daily call handling is made effortless with 10 dual-LED line keys supporting up to 50 programmable DSS keys across 5 screen views, alongside dedicated illuminated touch keys for mute, headset, and messaging.  

Peripheral Expansion and Hardware Connectivity

The T74LTE supports a broad selection of wired and wireless office peripherals to match individual workflow preferences. Built-in Bluetooth 5.0 enables direct pairing with wireless Bluetooth headsets while automatically synchronising mobile contact lists. A versatile USB-A 2.0 port allows users to connect corded USB headsets, record calls locally onto a USB flash drive, or attach up to three Yealink EXP55 colour expansion modules. Standard RJ9 ports are also built into the hardware for dedicated handset and corded headset connections.

Enterprise-Grade Security and Device Management

Built on a hardened Linux 6.1 architecture, the T74LTE includes robust security protocols to safeguard corporate voice communications. Voice traffic is secured using TEE (Trusted Execution Environment) hardware encryption, Transport Layer Security (TLS 1.3), Secure Real-time Transport Protocol (SRTP), and AES-256 configuration file encryption. For wireless safety, the system supports modern WPA2 and WPA3 Wi-Fi authentication standards. System administrators can handle mass auto-provisioning remotely via FTP, TFTP, HTTP, and HTTPS protocols, with native compatibility for BroadSoft and Metaswitch device management platforms.

Features

• Flexible VoIP & 4G LTE Connectivity - Combines standard VoIP/SIP telephony and cellular data networks on a single desktop unit, supporting up to 16 accounts (1 IMS cellular account for 4G VoLTE and 15 SIP accounts for IP-PBX setups) alongside full PBX call management capabilities
• Instant SIM-Based 4G Deployment - Features a built-in nano SIM slot running on Linux 6.1 with automatic IMS account registration upon power-up, enabling zero-cabling setups anywhere within 4G coverage
• Triple Network Options & Redundancy - Provides versatile connection options via 4G LTE, dual-band Wi-Fi (2.4GHz/5.0GHz), and a 100M Ethernet port, ensuring uninterrupted voice service with automatic failover if any network drops
• Optima HD Audio & Smart Filtering - Uses Yealink Optima HD Voice, Acoustic Shield, and Smart Noise Filtering to actively eliminate background sounds and maintain acoustic clarity in busy environments
• 4.3-Inch Colour Display - Displays caller ID, contacts, status icons, and custom wallpapers on a 480x272 pixel TFT colour screen
• Programmable Line & Function Keys - Features 10 LED line keys supporting up to 50 DSS keys across 5 paging views, along with illuminated touch buttons for headset, mute, and messaging
• Versatile Headset & Peripherals - Includes built-in Bluetooth 5.0 for wireless headsets, a USB 2.0 port for USB headsets or local call recording, and dual RJ9 ports for corded handsets and headsets
• Modular Expansion Support - Fully compatible with up to three Yealink EXP55 Colour Expansion Modules to scale call management for receptionists and busy executives
• Enterprise Security Standards - Protects voice and network data using TEE hardware encryption, TLS 1.3, SRTP, AES-256 configuration encryption, and WPA2/WPA3 Wi-Fi security protocols

Technical Specifications

PackageContents

• Yealink T74LTE Phone
• Handset with Handset Cord
• Power Supply
• Desk Stand
• Quick Start Guide