Yealink SIP-T48U SIP Phone

The Yealink SIP-T48U is a high-end 16-line IP phone designed for executives and professionals seeking a robust communication hub. Part of Yealink’s T4U series, it features a large 7-inch color touchscreen, dual USB ports, and advanced HD audio performance. With support for multiple VoIP accounts, expansion modules, and enterprise-grade security, the SIP-T48U provides seamless, professional communication for demanding business environments.

Product Features

7-Inch Color Touchscreen

The 7-inch 800 x 480-pixel backlit color display offers intuitive navigation, making it easy to switch between applications, view call information, and manage settings. The 24-bit color depth ensures sharp and vibrant visuals.

HD Audio Performance

Yealink Optima HD Voice technology combined with the Opus wideband codec provides crystal-clear audio, even on poor network connections. Acoustic Shield, Smart Noise Filtering, and a full-duplex hands-free speakerphone with Acoustic Echo Cancellation (AEC) enhance call clarity.

Dual USB Ports

Two USB 2.0 ports allow simultaneous connectivity for Bluetooth or Wi-Fi dongles, USB headsets, and flash drive call recording. This ensures maximum flexibility for professional workflows.

Extensive Line Support

Supports up to 16 SIP accounts, allowing high-volume call handling for busy executives and teams. Programmable DSS keys enhance efficiency and streamline call management.

Expansion Ready

Compatible with up to three EXP43 Expansion Modules, adding up to 180 additional programmable buttons for complex call operations or large-scale office environments.

Advanced Telephony Features

Supports 10-way conferencing, Busy Lamp Field (BLF), Bridged Line Appearance (BLA), visual voicemail, and comprehensive call management features to improve productivity.

Connectivity & Mounting

Equipped with dual-port Gigabit Ethernet with Power over Ethernet (PoE) support. Includes a stand with two adjustable angles and is also wall-mountable, offering flexible deployment options.

Security & Management

Features TLS 1.3, SRTP, HTTPS certificate management, and AES encryption for secure configuration files. Supports Zero Touch Provisioning and Yealink’s Redirection and Provisioning Service (RPS) for efficient mass deployment.

Product Specifications

• Display: 7-inch 800 x 480-pixel color touchscreen, 24-bit depth, backlit
• SIP Accounts: Up to 16 accounts
• Programmable Keys: 29 DSS keys across 3 pages
• Dedicated Keys: 7 feature keys (Message, Headset, Hold, Mute, Transfer, Redial, Speakerphone), volume, and navigation keys
• Audio Codecs: Wideband: Opus, G.722, AMR-WB (optional); Narrowband: G.711(A/μ), G.723.1, G.729AB, G.726, iLBC, AMR-NB (optional)
• Telephony Functions: 10-way conferencing, BLF, BLA, visual voicemail
• Connectivity: 2 x Gigabit Ethernet (RJ-45), 2 x USB 2.0, 1 x RJ9 handset port, 1 x RJ9 headset port
• Security: TLS 1.3, SRTP, HTTPS certificate manager, AES encryption
• Provisioning & Management: Zero Touch Provisioning, RPS, browser and phone UI configuration, dual firmware images
• Power Consumption: PoE: 2.3W–4.7W; Optional PSU: 1.8W–3.8W (DC 5V/2A)
• Physical Dimensions: 266mm x 226mm x 185mm x 54mm (W x D x H x T)
• Operating Temperature: −10°C to +50°C (+14°F to 122°F)