Polycom Trio 8500 Audio Conference Phone — a widely used smart conference‑phone, suited for small-to-medium meeting rooms, with good audio quality, SIP / UC support and flexible connectivity.

📞 Overview & Use‑Case

• The Trio 8500 is a hybrid‑registration conference phone: it supports open SIP, and can register on multiple communication/VoIP platforms simultaneously (SIP, cloud‑conferencing, etc.). Geon Asia+2intermedia.com+2

• It is ideal for small‑to‑mid sized conference rooms / huddle rooms where 4–8 participants meet. voipon.co.uk+2Israk Solutions Sdn. Bhd.+2

🖥️ Interface & Connectivity

• Touch‑screen: 5‑inch color capacitive LCD, resolution 720 × 1280 px, 9:16 aspect ratio. Manuals++2pmctelecom.co.uk+2

• On‑screen virtual keyboard (for dialling, text entry) supported. headset.com+1

• Ports: 1 × USB 2.0 Type‑A (host, supports battery charging, BC1.2 compliant) and 1 × USB 2.0 Micro‑B (device) port. Manuals++1

• Connectivity: integrated Bluetooth 4.0 (for pairing with mobile devices/laptops for audio or content sharing). Geon Asia+1

• Interface supports Unicode (UTF‑8) and multiple languages/localizations (Arabic, Chinese, English, French, German, Japanese, Spanish, etc.). Manuals++1

🔊 Audio & Microphone / Speaker Details

• Microphones: 3 cardioid (MEMS) microphones for 360° pickup. Manuals++1

• Microphone pickup range: approx 4.3 m / 14 ft — sufficient for small to medium rooms. netstorage.ringcentral.com+1

• Loudspeaker: Frequency response approx 180 – 14,000 Hz, peak loudness around 90 dB at 0.5 m. Geon Asia+2pmctelecom.co.uk+2

• Audio quality: Supports high-definition voice (HD Voice), with technologies like Polycom Acoustic Clarity™ (full‑duplex conversations, echo cancellation, noise suppression) and NoiseBlock™ (automatically mutes background noise when no one is speaking). voipon.co.uk+2ITstore.ae+2

• Supported audio codecs include: G.711 (A‑law & µ‑law), G.719, G.722, G.722.1 / G.722.1C, G.729AB, Polycom Siren 7 & 14, SILK (depending firmware/region). Manuals++2pmctelecom.co.uk+2

📞 Call‑Handling & Conferencing Features

• Up to 3 call‑lines (though max one may be with certain UC services). voipon.co.uk+1

• Shared call / bridged‑line appearance, call waiting, call transfer, hold, divert (forward), pick‑up, call timer, distinctive incoming‑call treatment. voipon.co.uk+1

• Local five‑way audio conferencing (i.e. 5 participants on a call) supported. voipon.co.uk+1

• One‑touch speed‑dial / one-touch meeting join (useful for quick conference start). Dunes Audio Visual+1

• Directory access (e.g. LDAP) for corporate contacts (useful in enterprise settings). voipon.co.uk+1

• Visual conference management UI (via its screen) for ease of use. intermedia.com+1

🌐 Network / Protocol / Provisioning & Security

• Supports open SIP (IETF SIP – RFC 3261 + related standards) — making it compatible with many VoIP PBX / UC systems. intermedia.com+1

• Dual‑port gigabit Ethernet (LAN in + LAN out) – 10/100/1000Base‑TX. netstorage.ringcentral.com+1

• Supports standard provisioning & config management: DHCP, SNTP (time sync), FTP/TFTP/HTTP/HTTPS server‑based central provisioning, VLAN support (CDP, LLDP‑MED), QoS (802.1p/Q, DSCP), VLAN tagging, etc. infiniteit.com.my+1

• Security: Supports secure device provisioning, compliant protocols/standards, configuration password protection, encryption where applicable (depending deployment) — suitable for enterprise / corporate use. intermedia.com+1