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.
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.
| Display & user interface | |
| Display | 5-inch 720×1280 capacitive color touchscreen |
| Line keys | 4 line keys with dual-color LEDs |
| Soft keys | Context-sensitive under the display |
| VoIP & SIP | |
| SIP accounts | 4 |
| SIP protocols | SIP v2 (RFC 3261), supported on voip.army's legacy provisioning VLAN with UCS firmware 4.0.15 |
| Codecs | G.711, G.722, G.722.1, G.722.1C, G.729AB, iLBC, Siren 14, Siren 22, Opus |
| Audio | |
| Speaker | Full-duplex with Polycom Acoustic Clarity |
| HD voice | G.722 wideband on handset/speaker |
| Headset | Speakerphone only / not applicable |
| Connectivity | |
| Ethernet | Dual 10/100 Mbps |
| PoE | IEEE 802.3af Class 2 |
| Power & physical | |
| Power source | PoE 802.3af Class 2 (preferred) or Polycom power adapter (sold separately) |
| Weight | 1.0 kg |
| Dimensions | 274 × 274 × 76 mm (triangular) |
| Wall-mountable | Yes |
| Lifecycle status | |
| EOL year | Current product |
| Firmware on voip.army | Current UCS firmware track |
| voip.army stock | New, ships pre-configured |
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.
Boot, fetch config from our provisioning server, register, ready. About one minute on a normal internet connection.
Run up to 4 simultaneous SIP registrations. Each line key has a dual-color LED for status.
Bringing your own? Send us the MAC, factory-reset, plug in. No charge to add it to the fleet.
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.
PC pass-through port on the back lets you daisy-chain a single ethernet drop to phone and computer.
Class 2. Any 802.3af-compliant switch from the last 15 years will power it without issue.
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.