Do I actually need 12 SIP accounts?

Almost certainly not. Six is plenty for 99% of deployments. The T42G is for owners juggling multiple businesses, MSPs assigning phones to multiple customer extensions, or supervisor desks with hunt-group + queue + personal lines + monitoring.

T42G vs T42S — which one?

The T42S adds USB headset support and Opus codec for $10 more. Get the S for new deployments; the G is fleet-matching.

T42G vs T46G — should I pay $30 more for color?

Yes, if you actually look at the screen. The T46G's 4.3-inch color screen is a huge usability win. The T42G is for desks where the screen is irrelevant.

Does the T42G support sidecars?

Yes — the legacy EXP40 sidecar (not the newer EXP43, which is T*U-family only).

Yealink · T4 series · 12-line gigabit

Yealink T42GTwelve SIP lines on a compact T4 footprint.

Twelve SIP accounts, a 2.7-inch 192×64 backlit monochrome screen, dual gigabit ethernet with PoE, six line keys (multi-page), EHS headset support. The T42G is the T41-class chassis with the SIP account ceiling raised from 6 to 12 — useful for supervisor desks that need many simultaneous registrations.

Display

2.7″ backlit · 192×64 mono

SIP accounts

12 lines

Programmable keys

6 line + multi-page

Ethernet

Dual gigabit · PoE class 1

Audio

HD voice · EHS

Power

PoE or 5V/1.2A adapter

$159 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 T42G Rent for $11.99/mo Datasheet (PDF) ↓

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

Yealink T42G voip desk phone — front view with handset and display — Yealink T42G

Why the T42G is on the catalog.

The T42G's distinguishing feature is SIP account capacity: 12 simultaneous registrations on a chassis the same size as the T41S. For most deployments that is overkill — you rarely need that many active accounts on one phone. Where it makes sense: a small-business owner who needs to register lines for two different businesses plus a personal cell DID plus an after-hours emergency line plus a sales hunt-group plus the office main, and so on. Twelve gives you room.

What you give up vs. T46G: the bigger 4.3-inch color screen. The T42G is monochrome with the same 2.7-inch panel as the T41S. For an executive who looks at the phone screen often, the T46G is the better $0-difference upgrade. For a supervisor who lives in their headset and only glances at the screen, the T42G keeps the lower-profile footprint.

Where it sits in the T42 family: this is the legacy 12-line version. The T42S (USB-enabled, $10 more) and T42U (dual USB, $20 more) are the newer variants. For new deployments those are the better choices; the T42G stays in the catalog for fleet matching.

Full technical specifications.

Display & user interface
Display	2.7-inch 192×64 backlit graphical LCD
Line keys	6 line keys with dual-color LEDs (multi-page assignment)
Soft keys	4 context-sensitive soft keys
Navigation	5-way nav, dedicated function keys
VoIP & SIP
SIP accounts	Up to 12 SIP accounts
Protocols	SIP v2, TLS, SRTP, BLF/BLA, shared call appearance
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 + EHS support (no USB on T42G)
Connectivity
Ethernet	Dual 10/100/1000 Mbps gigabit
PoE	IEEE 802.3af Class 1
Expansion	EXP40 sidecar supported
Power & physical
Power	PoE or 5V/1.2A adapter
Dimensions	Approximately 220 × 200 × 41 mm
Wall mount	Yes
In the box
Included	T42G handset, base, curl cord, ethernet cable, stand, provisioning card
Not included	Power adapter, EHS adapter, sidecar

How it works on voip.army.

Plug the T42G 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

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

Programmable keys

6 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 T42G. We catch regressions before they reach your fleet.

Need T42Gs 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 T42GTwelve SIP lines on a compact T4 footprint.

Why the T42G 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 T42S

Yealink T42U

Yealink T41S

Yealink T46G

Need T42Gs for every desk?