SIP-T53

Manufacturer reference

Manufacturer details describe the cited version. Confirm the exact unit and intended system.

Display & accounts

Display

3.7-inch adjustable graphical LCD, 360 × 160 pixels.

SIP account reference

Up to 12 VoIP accounts; PBX licensing and provisioning require confirmation.

Connections & power

Ethernet

Two Gigabit Ethernet ports. This does not establish PoE output to another device.

PoE reference

IEEE 802.3af, Class 2 in the cited sheet; check the supplied unit.

External power option

Optional Yealink adapter: 5 V DC / 1.2 A output; confirm local plug and package.

Wireless reference

Bluetooth through BT40; Wi-Fi through WF40/WF50 USB dongles. Accessories and firmware require confirmation.

USB interface

One USB 2.0 port; recording needs a flash drive and compatible configuration.

Expansion & DECT options

Expansion option

EXP50: up to 3 modules in the cited configuration; accessories and firmware require confirmation.

DECT option

DD10K dongle required: up to 4 handsets and 4 concurrent calls in the cited configuration.

Selection notes

• Check the supplied hardware, firmware and PBX configuration against this cited manufacturer document.
• The source carries copyright 2020 and no printed revision. Its upload path date is not a hardware or firmware version.
• Accessory inclusion and current compatibility are not assumed. The DECT option needs DD10K; do not apply these desk-phone figures to a standalone handset or assume every newer handset is supported.
• One USB port does not guarantee that every listed accessory works simultaneously. ISD confirms the actual package, supply, stock, price, lead time and local warranty separately.

Official documents

• Yealink SIP-T53 manufacturer datasheet

Manufacturer source checked 2026-10-14. The supplied unit and local terms require confirmation.