Is the VVX 400 still supported on voip.army?

Yes. We auto-provision it the same as any current VVX. UCS firmware 5.9.x runs on the VVX 400 and supports TLS 1.2 and SRTP for secure provisioning and call media.

VVX 400 vs VVX 410 — which is which?

The 410 is the gigabit version of the 400. Same chassis, same screen, same twelve lines — the 410 just adds dual gigabit Ethernet on the LAN/PC pass-through. About $20 more, generally worth it.

Can I add an expansion module to the VVX 400?

Yes — the VVX Color Expansion Module (EXP 50) is supported via the back RJ45 port. Each module adds 28 multi-color keys across three pages, and you can chain up to three modules off a single phone.

Does the VVX 400 have a USB port?

No. The 400 series predates USB on Polycom desk phones. For USB headset support you need the VVX 450 or any VVX 500+ model.

Poly · VVX series · color 12-line workhorse

Poly VVX 400A color 12-line workhorse that just keeps working.

The VVX 400 is the original 12-line color VVX — a 3.5-inch color TFT, twelve simultaneous SIP accounts, expansion module support. Long-discontinued in favor of the 410 (gigabit) and 411 (refreshed CPU), but we still ship it to customers running large existing fleets who want SKU continuity.

Display

3.5″ color · 320×240

SIP accounts

12 lines

Ethernet

Dual 10/100

USB ports

—

Bluetooth / Wi-Fi

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Expansion

VVX EXP 50

$199 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 VVX 400 Rent for $11.99/mo Datasheet (PDF) ↓

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

Poly VVX 400 VoIP desk phone — front view with handset and dialpad — Poly VVX 400

Why the VVX 400 is on the catalog.

The VVX 400 was Polycom's volume-tier color desk phone from roughly 2013 to 2017. Twelve SIP accounts on a 3.5-inch color screen was a lot of capacity for a non-receptionist phone, and the BLF layout — six on-screen line keys across two pages — made it popular with sales teams and managers monitoring direct reports.

Mechanically it's identical to the VVX 410 (which added gigabit Ethernet) and the VVX 411 (which refreshed the CPU). All three run the same firmware and accept the same VVX EXP 50 expansion modules. If you've got 400s in production today, there's no reason to retire them.

For new deployments, we'd push you to the VVX 411 (the current direct successor — gigabit, refreshed CPU, same form factor) or the VVX 450 (the current-gen color phone with dual USB on top of gigabit). The 400's 100Base Ethernet pass-through is the only real spec compromise versus the modern equivalents.

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 400 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 400s 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.

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