VVX 400 vs VVX 401 — which should I buy?

The 401. Same chassis, same display, same line key layout, but a faster CPU and current firmware track. The 400 we carry only for fleet continuity.

Does the VVX 401 have gigabit Ethernet?

No — dual 10/100 only. For gigabit on the same chassis, the VVX 411 is the right SKU; for gigabit plus USB, the VVX 450.

Can I add an expansion module to the VVX 401?

Yes — up to three VVX EXP 50 modules can chain off the back RJ45 port. Each adds 28 multi-color keys across three pages, so three modules = 252 programmable keys.

Will the VVX 401 auto-provision on voip.army?

Yes. Send us the MAC, factory-reset the phone, and it'll register on next boot. We pre-load the configuration before shipping if you order through us.

Poly · VVX series · color 12-line — refreshed cpu

Poly VVX 401A color 12-line — refreshed cpu that just keeps working.

The VVX 401 is the direct successor to the VVX 400 — same twelve-line color form factor, faster processor, refreshed firmware track. Still dual 10/100 Ethernet only; for gigabit on the same chassis, look at the VVX 411 or VVX 450.

Display

3.5″ color · 320×240

SIP accounts

12 lines

Ethernet

Dual 10/100

USB ports

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Bluetooth / Wi-Fi

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Expansion

VVX EXP 50

$209 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 VVX 401 Rent for $17.99/mo Datasheet (PDF) ↓

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

Poly VVX 401 VoIP desk phone — front view with handset and dialpad — Poly VVX 401

Why the VVX 401 is on the catalog.

The VVX 401 replaced the VVX 400 in 2017 as Poly's refreshed twelve-line color phone. The motivation was the same as every other VVX x01 refresh: the original CPU was getting taxed by accumulating UCS firmware features, so Polycom shipped the same chassis with faster silicon.

It's the right pick if you want a color twelve-line Poly phone, you're okay with 100Base Ethernet, and you want the current UCS firmware track. For an extra ten dollars the VVX 411 gives you gigabit Ethernet on the same chassis — almost always worth doing if you have a workstation behind the phone.

Where it isn't the right phone: if anyone wears a headset all day, the 401 has no USB and that's a frustration — the VVX 450 (current generation, dual USB, gigabit, color, twelve lines) is the volume upgrade pick for about $40 more. If you need a touchscreen, look at the VVX 501.

Full technical specifications.

Display & user interface
Display	3.5-inch 320×240 color LCD
Line keys	12 programmable line keys
Soft keys	4 context-sensitive soft keys under the display
Physical keys	Dialpad, hold, mute, transfer, headset, message, redial, volume, navigation
Languages	Multiple on-screen languages (English, Spanish, French, German, Portuguese, etc.)
VoIP & SIP
SIP accounts	Up to 12
SIP protocols	SIP v2 (RFC 3261), TLS / SRTP, NAT traversal, BLF / BLA, shared call appearance
Codecs	Opus, G.722, G.722.1, G.711a/μ, G.729AB, iLBC, Siren 14 / 22
DTMF	In-band, RFC 2833, SIP INFO
QoS	802.1p/Q VLAN tagging, DiffServ ToS, LLDP-MED
Audio
Speaker	Full-duplex with Polycom Acoustic Clarity (AEC, dynamic noise reduction)
HD voice	Polycom HD Voice on handset and speakerphone
Headset support	RJ9 headset jack, EHS via APP-51 adapter (sold separately)
Connectivity
Ethernet	Dual 10/100 Mbps
PoE	IEEE 802.3af Class 2
USB	None
Bluetooth	Not supported
Wi-Fi	Not supported (USB dongle not officially supported)
Power & expansion
Power source	PoE 802.3af Class 2 (preferred) or Poly 5V/0.6A power adapter (sold separately)
Expansion module	VVX EXP 50
Physical
Weight	1.02 kg
Dimensions	248 × 178 × 165 mm
Wall-mountable	Yes
Operating temperature	0 to 40 °C (32 to 104 °F)
In the box (from voip.army)
Included	Handset, base unit, curl cord, ethernet cable, stand, quick-start card, voip.army provisioning card with extension & SIP credentials pre-loaded
Not included	Power adapter (PoE preferred), EHS adapter for wireless headsets, expansion module

How it works on voip.army.

Plug the VVX 401 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 internet connection.

SIP accounts on one phone

Run up to 12 simultaneous SIP registrations. Each line key has a dual-color LED for status.

Per-device onboarding fees

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

100M

Ethernet to the workstation

10/100 Mbps pass-through is fine for voice but caps a daisy-chained workstation at 100 Mbps.

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USB headset ports

No USB. Wired RJ9 headset jack only (if equipped).

802.3af

PoE class

Class 2 on most VVX. Any standard 802.3af switch powers it; no separate adapter needed.

Need VVX 401s 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