Limited: Save 30% on your first 3 months — porting your number is free. See pricing
Poly · Trio series · conference

Poly Trio 8500Still works. Still supported.

The Poly Trio 8500 is the current-generation entry-tier IP conference phone — a 5-inch color touchscreen, 12-foot microphone pickup, full-duplex audio, USB and Bluetooth pairing for personal-device calls. The volume conference phone pick for huddle rooms and small-to-medium meeting spaces.

Display
color touchscreen
SIP accounts
4 lines
Ethernet
Dual 10/100
Type
IP conference phone (current g
EOL year
Current
Condition
New
$599 one-time
or rent for $24.99/mo — month-to-month, return anytime
Ships pre-configured for voip.army
✓ Auto-provisioned out of the box ✓ Warranty replacement included with rental ✓ 30-day return on refurbished
Poly Trio 8500 VoIP phone — front view with handset and dialpad
Poly Trio 8500

Why we still support the Trio 8500.

The Trio 8500 is what Poly replaced the SoundStation IP 5000 / 6000 with — a modern touch-interface conference phone built around a 5-inch color touchscreen and the same iconic triangular chassis with three corner-mounted speakers. Twelve-foot microphone pickup, full-duplex audio, USB and Bluetooth pairing so anyone in the room can route their laptop's audio through the conference phone.

It's the right pick for huddle rooms, small conference rooms, and any space where you'd previously have used a SoundStation IP 5000 or IP 6000. For larger rooms (10+ people) where you need expansion microphones, the Trio 8800 is the bigger sibling.

Where it isn't the right phone: for boardrooms with twelve-plus people around a long table, the 8500 can't accept satellite expansion microphones — you need the Trio 8800. For purely-personal video conferencing the Studio P5 or Studio P15 are video bars, not conference phones. The Trio line is the SIP-first conference phone choice.

Full technical specifications.

Display & user interface
Display5-inch 720×1280 capacitive color touchscreen
Line keys4 line keys with dual-color LEDs
Soft keysContext-sensitive under the display
VoIP & SIP
SIP accounts4
SIP protocolsSIP v2 (RFC 3261), supported on voip.army's legacy provisioning VLAN with UCS firmware 4.0.15
CodecsG.711, G.722, G.722.1, G.722.1C, G.729AB, iLBC, Siren 14, Siren 22, Opus
Audio
SpeakerFull-duplex with Polycom Acoustic Clarity
HD voiceG.722 wideband on handset/speaker
HeadsetSpeakerphone only / not applicable
Connectivity
EthernetDual 10/100 Mbps
PoEIEEE 802.3af Class 2
Power & physical
Power sourcePoE 802.3af Class 2 (preferred) or Polycom power adapter (sold separately)
Weight1.0 kg
Dimensions274 × 274 × 76 mm (triangular)
Wall-mountableYes
Lifecycle status
EOL yearCurrent product
Firmware on voip.armyCurrent UCS firmware track
voip.army stockNew, ships pre-configured

How it works on voip.army.

The Trio 8500 runs Polycom UCS firmware 4.0.15 — the last release that supports this hardware. It onboards onto voip.army the same way as any current phone, just on our legacy provisioning VLAN because the phone's TLS stack predates modern web standards. Call quality is normal SRTP.

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.

4

SIP accounts on one phone

Run up to 4 simultaneous SIP registrations. Each line key has a dual-color LED for status.

0

Per-device onboarding fees

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

4.0.15

UCS firmware version

Last firmware Polycom shipped for this phone (2018). Still works perfectly on voip.army; provisions over our isolated legacy VLAN because the phone can't speak TLS 1.2.

100m

Ethernet to the workstation

PC pass-through port on the back lets you daisy-chain a single ethernet drop to phone and computer.

802.3af

PoE class

Class 2. Any 802.3af-compliant switch from the last 15 years will power it without issue.

Onboarding a fleet of Trio 8500s?

Send us a CSV of MAC addresses. We add them to the provisioning server, you factory-reset and plug in, they pick up their voip.army config within a minute.

✓ Free shipping on orders $200+ ✓ 30-day hardware return ✓ Refurbished, tested, re-flashed