Yealink SIP-T48G Gigabit VoIP Touchscreen Phone
The Yealink SIP-T48G was the flagship model in Yealink’s T4 IP phone series, built for executives and busy professionals who wanted a large touchscreen interface for fast, paperless call management. It features a 7-inch 800×480-pixel colour touchscreen with backlight, supports up to 6 SIP accounts, and offers 29 one-touch programmable DSS keys across multiple screens. Dual Gigabit Ethernet ports support rapid call handling without network bottlenecks, while Yealink Optima HD voice and the G.722 codec deliver clear, wideband audio. A built-in USB port supports Bluetooth headsets via the BT40 dongle and Wi-Fi via the WF40 dongle, and the phone works with the EXP40 expansion module and EHS36 headset adapter for extended functionality.
Key Features
- 7-inch 800×480 colour touchscreen, with backlight for fast switching between screens
- Up to 6 SIP accounts, with 29 one-touch programmable DSS keys
- Dual Gigabit Ethernet ports, supporting rapid call handling and heavy phone traffic
- Bluetooth and Wi-Fi support via USB dongles (BT40 and WF40 respectively)
- Yealink Optima HD voice, delivering clear wideband audio over handset or headset
Technical Specifications
| Specification | Detail |
|---|---|
| Model | SIP-T48G |
| SIP Accounts | Up to 6 |
| Display | 7″ 800 x 480-pixel colour touchscreen, backlit |
| Audio | Optima HD voice, G.722 wideband codec |
| Programmable Keys | 29 one-touch DSS keys |
| Feature Keys | 7 (message, headset, hold, mute, transfer, redial, hands-free speaker) |
| Network | Dual Gigabit Ethernet ports |
| USB | 1 port (Bluetooth via BT40 dongle, Wi-Fi via WF40 dongle) |
| Power | PoE support |
| Headset Support | EHS36 adapter compatible |
| Expansion | EXP40 expansion module compatible |
| Conferencing | 3-way local conferencing |
| Product Status | Discontinued (End-of-Life since April 1, 2025) — successor T48S also discontinued (EOS March 2022) |
Best Suited For
- Existing T48G deployments needing a compatible spare or replacement handset
- Executive desks originally set up with this model, where the phone was chosen for its touchscreen and Gigabit performance
- Buyers aware of the EOL status, purchasing as legacy stock rather than expecting ongoing manufacturer support
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