T48U vs T57W — which executive phone?

Same 7-inch touch, same SIP capacity, same money. T48U has EXP43 sidecar support; T57W has built-in Wi-Fi 6 + Bluetooth. Pick T57W for wireless desks; pick T48U for wired desks needing many BLF buddies via sidecar.

Will the EXP43 sidecar work with the T48U?

Yes — chain up to 6 EXP43 modules for 240 dynamically-assigned BLF / speed-dial keys. Each module has its own 4.3-inch color screen.

Does the T48U run Android?

No. For Android, see the T58A or T58W.

Run a wired USB headset and a Wi-Fi dongle (WF40/WF50) or Bluetooth dongle (BT40) simultaneously without choosing one.

Yealink · T4 series · 7-inch touch dual USB

Yealink T48UThe modern T48 — touch, dual USB, EXP43.

Sixteen SIP accounts, a 7-inch 800×480 capacitive touchscreen, dual gigabit ethernet with PoE, dual USB ports, EHS support, modern EXP43 sidecar support. The T48U is the current-generation executive 7-inch phone — what we recommend for any new C-suite desk or boardroom phone in the T4 family.

Display

7″ color · 800×480 · capacitive touch

SIP accounts

16 lines

Programmable keys

29 line + multi-page

Ethernet

Dual gigabit · PoE class 3

Audio

HD voice · dual USB · EHS · Opus

Power

PoE or 5V/2A adapter

$289 one-time

or rent for $17.99/mo — month-to-month, return anytime

Ships pre-configured · free next-business-day for orders $200+

Order a T48U Rent for $17.99/mo Datasheet (PDF) ↓

✓ Auto-provisioned out of the box ✓ Warranty replacement included with rental ✓ Free shipping on orders $200+

Yealink T48U voip desk phone — front view with handset and display — Yealink T48U

Why the T48U is on the catalog.

The T48U is the modern T48 — Yealink's current top-tier non-Android executive phone. It takes the T48S touchscreen and adds the T*U generation's improvements: dual USB ports, EXP43 sidecar support, a faster processor, and a longer firmware support horizon. For brand-new executive deployments in the T4 family, this is the answer.

Where it earns its $50 over the T48G: touchscreen navigation is now baseline expectation in this price tier, dual USB means a headset and a Wi-Fi dongle never have to fight for the same port, and the EXP43 sidecar (40 keys per module, up to 6 chained = 240 BLF buddies) supports executive-assistant deployments that the legacy EXP40 cannot match for screen quality.

Where to step sideways: the T57W is $0 difference but adds built-in Wi-Fi 6 and Bluetooth 4.2 at the cost of EXP43 sidecar support. For wireless-first executive desks, the T57W wins. For wired desks needing the EXP43 sidecar for monitoring a large team, the T48U wins. Choose by use case.

Where to step up: the T58A and T58W add Android OS and optional camera (T58A) or built-in camera (T58W) for $60-100 more. For executive desks that double as video conferencing endpoints, the T58 family is the right call. For voice-only executive desks, the T48U is the more focused, less-distracting choice.

Full technical specifications.

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 (RFC 3261), TLS, SRTP, BLF/BLA, shared call appearance
Codecs	Opus, G.722, G.711, G.729AB, G.726, iLBC
Provisioning	FTP/TFTP/HTTP/HTTPS, PnP, TR-069, RPS
Security	HTTPS, TLS, SRTP, 802.1X, AES config encryption
Audio
HD voice	HD handset and HD speakerphone
Speaker	Full-duplex with AEC
Headset	RJ9 + 2 × USB + EHS
Connectivity
Ethernet	Dual 10/100/1000 Mbps gigabit
PoE	IEEE 802.3af Class 3
USB	2 × USB 2.0
Expansion	EXP43 sidecar (40 keys/module, up to 6 chained = 240 keys)
Power & physical
Power	PoE 802.3af, or 5V/2A adapter
Dimensions	Approximately 266 × 211 × 41 mm
Wall mount	Yes
In the box
Included	T48U handset, base, curl cord, ethernet cable, stand, provisioning card
Not included	Power adapter (PoE preferred), USB headset, EXP43 sidecar

How it works on voip.army.

Plug the T48U 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.

60s

Time from plug-in to first call

Boot, fetch config from our provisioning server, register, ready. About one minute on a normal connection.

SIP accounts on one phone

16 lines per phone. Each line key has a dual-color LED for status at a glance.

Programmable keys

29 line + multi-page mapped from the voip.army portal — BLF, paging, parking, transfer destinations.

Per-device onboarding fees

Bringing your own? Send us the MAC, factory-reset, plug in. No charge to add it to the fleet.

802.3af

PoE class

Standard PoE — any 802.3af-compliant switch from the last 15 years powers the phone without an adapter.

Yealink

Auto-provisioning template

Tested against every Yealink firmware release for T48U. We catch regressions before they reach your fleet.

Need T48Us for every desk?

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.

Get a quote Start a free trial first

✓ Free shipping on orders $200+ ✓ 30-day hardware return ✓ Pre-configured before shipping

Yealink T48UThe modern T48 — touch, dual USB, EXP43.

Why the T48U is on the catalog.

Full technical specifications.

How it works on voip.army.

Time from plug-in to first call

SIP accounts on one phone

Programmable keys

Per-device onboarding fees

PoE class

Auto-provisioning template

Phones to compare it against.

Yealink T48S

Yealink T46U

Yealink T57W

Yealink T58A

Need T48Us for every desk?