Sixteen SIP accounts, a 7-inch 800×480 capacitive touchscreen, dual gigabit ethernet with PoE, single USB port, EHS support, Opus codec. The T48S is the touchscreen version of the T48G — the executive desk phone that introduced touch navigation to the Yealink T4 line.
The T48S took the T48G chassis and added a capacitive touchscreen plus the standard mid-2010s Yealink refresh (USB port, Opus codec). For $30 over the T48G, you get a phone that lets executives tap to navigate menus, swipe between BLF pages, and use the directory like a small touchscreen device. For most users in the executive tier, this is the version you want.
Where touch actually helps: BLF page swiping with sixteen SIP lines and dozens of monitored extensions, browsing a 500-contact directory, switching between recent calls. Yealink's UI is built for touch on this model — buttons are sized appropriately, swipe gestures work as expected. It feels like a real touchscreen device, not a non-touch screen retrofitted.
Where the T48U beats it: dual USB instead of single (so a Wi-Fi dongle does not block headset port), modern EXP43 sidecar support, faster processor, longer firmware horizon. $20 more. For brand-new deployments the T48U is the right pick. The T48S stays in the catalog for the install base.
| Display & user interface | |
| Display | 7-inch 800×480 capacitive touch color TFT LCD |
| Touch | Multi-touch capacitive |
| Line keys | 29 multi-page line keys with dual-color LEDs |
| Soft keys | 4 context-sensitive soft keys |
| VoIP & SIP | |
| SIP accounts | Up to 16 SIP accounts |
| Protocols | SIP v2, TLS, SRTP, BLF/BLA |
| Codecs | Opus, G.722, G.711, G.723.1, G.729AB, G.726, iLBC |
| Provisioning | FTP/TFTP/HTTP/HTTPS, PnP, TR-069, RPS |
| Audio | |
| HD voice | HD handset and HD speakerphone |
| Speaker | Full-duplex with AEC |
| Headset | RJ9 + USB + EHS |
| Connectivity | |
| Ethernet | Dual 10/100/1000 Mbps gigabit |
| PoE | IEEE 802.3af Class 3 |
| USB | 1 × USB 2.0 |
| Expansion | EXP40 sidecar (legacy) |
| Power & physical | |
| Power | PoE or 5V/2A adapter |
| Dimensions | Approximately 266 × 211 × 41 mm |
| Wall mount | Yes |
| In the box | |
| Included | T48S handset, base, curl cord, ethernet cable, stand, provisioning card |
| Not included | Power adapter, USB headset, sidecar |
Plug the T48S into PoE and ethernet. About a minute later it has registered to your extension. Same auto-provisioning flow as every other supported phone — no SIP credentials to type, no firmware to chase.
Boot, fetch config from our provisioning server, register, ready. About one minute on a normal connection.
16 lines per phone. Each line key has a dual-color LED for status at a glance.
29 line + multi-page mapped from the voip.army portal — BLF, paging, parking, transfer destinations.
Bringing your own? Send us the MAC, factory-reset, plug in. No charge to add it to the fleet.
Standard PoE — any 802.3af-compliant switch from the last 15 years powers the phone without an adapter.
Tested against every Yealink firmware release for T48S. We catch regressions before they reach your fleet.
Tell us how many you need and what extensions to map. We ship pre-configured next business day; you plug them in and they work.