Is the T28P still being made?

End-of-life. Yealink builds limited stock for replacement orders. Support continues for security patches.

Should I buy T28Ps for a new deployment?

Only to match existing units. Every modern Yealink in the same price tier (T46G, T29G, T53) beats it on screen, ethernet, and firmware support window.

Does the T28P support a sidecar?

Yes — the legacy EXP38 / EXP39 sidecars work with it. 38 keys per module, up to 6 modules. Mostly relevant for matching an existing receptionist deployment.

How is it different from the T29G?

The T29G is the direct successor: color screen, gigabit ethernet, modern firmware. About $70 more. For new buys, the T29G is the answer.

Yealink · T2 series · 6-line · big screen

Yealink T28PSix lines with a larger 320×160 screen than its siblings.

Six SIP accounts, a 320×160 backlit monochrome screen (the largest in the legacy T2 series), 16 programmable keys, dual 10/100 ethernet with PoE, EHS support. The T28P is an older flagship of the T2 line — superseded by the T29G but still kicking on long-running deployments.

Display

4.3″ backlit · 320×160 mono

SIP accounts

6 lines

Programmable keys

16 · BLF-capable

Ethernet

Dual 10/100 · PoE class 2

Audio

HD voice · full-duplex

Power

PoE or 5V/2A adapter

$119 one-time

or rent for $11.99/mo — month-to-month, return anytime

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

Order a T28P Rent for $11.99/mo Datasheet (PDF) ↓

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

Yealink T28P voip desk phone — front view with handset and display — Yealink T28P

Why the T28P is on the catalog.

The T28P was Yealink's mid-2010s mid-flagship — a phone built for executive-adjacent desks before color screens became standard. The 320×160 monochrome panel is genuinely large for a non-color display, and it shows. You can read full caller ID, browse a 200-contact directory, and see a multi-line call log without scrolling, all on a screen that the T27G a step down truncates.

Where it lives in the catalog today: long-running deployments where matching existing T28Ps is the goal. Replacing a single failed unit on a 30-desk T28P fleet with a different model means retraining the user; buying another T28P keeps the muscle memory intact. We stock them for that exact need.

Where to skip it for a new deployment: every modern alternative beats it. The T29G adds color and gigabit for $60 more. The T46G adds color, gigabit, and sidecar support for $40 more. The T28P stays around because the install base persists, not because the spec sheet competes. For a fresh purchase, almost any T4 series phone is the better answer.

Full technical specifications.

Display & user interface
Display	4.3-inch 320×160 backlit graphical LCD
Programmable keys	16 dual-color LED line keys
Soft keys	4 context-sensitive soft keys
Navigation	5-way nav, dedicated function keys
VoIP & SIP
SIP accounts	Up to 6 SIP accounts
Protocols	SIP RFC 3261, TLS, SRTP, BLF/BLA
Codecs	G.722, G.711, G.723.1, G.729AB, G.726, iLBC
Provisioning	FTP/TFTP/HTTP/HTTPS, PnP
Audio
HD voice	HD handset and HD speakerphone
Speaker	Full-duplex with AEC
Headset	RJ9 + EHS support
Connectivity
Ethernet	Dual 10/100 Mbps
PoE	IEEE 802.3af Class 2
USB	1 × USB on later revisions
Power & physical
Power	PoE or 5V/2A adapter
Dimensions	Approximately 252 × 234 × 41 mm
Wall mount	Yes
Expansion	Supports EXP38/EXP39 sidecars
In the box
Included	T28P handset, base, curl cord, ethernet cable, stand, provisioning card
Not included	Power adapter, EHS adapter, sidecar module

How it works on voip.army.

Plug the T28P 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

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

Programmable keys

16 · BLF-capable 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 T28P. We catch regressions before they reach your fleet.

Need T28Ps 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 T28PSix lines with a larger 320×160 screen than its siblings.

Why the T28P 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 T29G

Yealink T27G

Yealink T46G

Need T28Ps for every desk?