What's the difference between VVX 350 and VVX 450?

Color. The VVX 450 is the color version of the same chassis — same six lines, same gigabit, same dual USB. About $50 more. Both run the same firmware, both support the same expansion modules.

Does the VVX 350 have Bluetooth?

Not built in, but the rear USB port accepts a Poly BT600 Bluetooth USB dongle (sold separately). With it you can pair a Bluetooth headset and use the phone hands-free.

Will my Plantronics Savi wireless headset work with the VVX 350?

Yes — either via USB (the headset plugs directly into the front USB port) or via the RJ9 jack with an APP-51 EHS adapter (sold separately). USB is the cleaner option.

Does the VVX 350 support an expansion module?

Yes — up to three VVX EXP 50 modules per phone. Each adds 28 multi-color keys across three pages, so three modules = 252 programmable keys. Sufficient for a receptionist monitoring a large floor.

Poly · VVX series · greyscale + gigabit + usb

Poly VVX 350A greyscale + gigabit + usb that just keeps working.

The VVX 350 is the current-generation six-line greyscale Poly phone — same 3.5-inch monochrome layout as the 300 series, refreshed processor, gigabit Ethernet, dual USB ports (front and back), Opus codec, and full UCS 6.x firmware support. It's the right pick for receptionists who want Poly's line-key real estate without paying the color-screen premium.

Display

3.5″ monochrome · 208×104

SIP accounts

6 lines

Ethernet

Dual gigabit

USB ports

2× USB

Bluetooth / Wi-Fi

—

Expansion

VVX EXP 50

$169 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 350 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 350 VoIP desk phone — front view with handset and dialpad — Poly VVX 350

Why the VVX 350 is on the catalog.

The VVX 350 is what the VVX 300 / 301 / 310 / 311 should have always been: a six-line greyscale phone with gigabit Ethernet on both ports and two USB ports — one front, one back. Plug a USB headset into the front, a Wi-Fi or Bluetooth dongle into the back, and you've covered every common accessory without compromise.

Spec-wise it sits between the VVX 311 (greyscale, gigabit, no USB) and the VVX 450 (color, gigabit, dual USB). If your team doesn't need color for BLF labels — and most receptionists with named buddy keys don't — the 350 saves you about $50 per desk over the 450 with no other functional loss.

Where it isn't the right phone: if your team genuinely benefits from color (sales floors where BLF status changes are color-coded to signal availability, or executive desks where the optics matter), the VVX 450 is the strict upgrade for $50 more. If you need a touchscreen, the 350 isn't touch — look at the VVX 501 or VVX 601.

Full technical specifications.

Display & user interface
Display	3.5-inch 208×104 monochrome backlit graphical LCD
Line keys	6 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 6
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, USB headset, EHS via APP-51 adapter (sold separately)
Connectivity
Ethernet	Dual-port 10/100/1000 Mbps gigabit
PoE	IEEE 802.3af Class 2
USB	2 USB 2.0 host ports
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 350 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 6 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.

Ethernet to the workstation

Gigabit pass-through to a daisy-chained workstation — no bottleneck for big file transfers.

USB headset ports

USB host ports for any standard headset (Jabra, Plantronics) — plug and play.

802.3af

PoE class

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

Need VVX 350s 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