The Grandstream UCM6304 is an enterprise-grade IP PBX that supports up to 2,000 users and 300 concurrent calls, offering a unified communication platform with built-in voice, video, meetings, chat, mobility, and advanced security—ideal for scalable business collaboration.
128×384 backlit LCD display
20 programmable dual-color buttons per module, 2 pages per module (40 contacts total)
BLF/speed dial
Daisy-chain up to 4 modules for up to 160 contacts/extensions
BLA (bridged line appearance)/SC
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1 SIP account, 2 line keys, 3-way conferencing, 3 XML programmable context-sensitive soft keys
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Dual-switched 10/100 mbps ports
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EHS support for Plantronics headsets
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Up to 500 contacts
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Call history up to 200 records
 20 SIP lines, 3-way conference, hotspot
 5″ high-resolution color display
 HD audio on speakerphone and handset
 Up to 60 DSS keys entries available (12 physical)
 Built-in Bluetooth for connecting Bluetooth headset
 Wi-Fi connectivity (via Wi-Fi dongle)
 Video codec H.264 support for receiving video calls
 Stand with 2 adjustable angles of 40 and 50 degrees
 Support EHS headset
 Dual Gigabit ports, integrated PoE
 Compatible with major platforms:3CX, Avaya, Asterisk,
Broadsoft, Metaswitch, Elastix etc.
à 2 Megapixel high-performance CMOS
à Analog HD output, up to 1080P resolution
à True Day/Night
à Smart IR
à Up to 20m IR distance
à IP66 weatherproof
Ubiquiti airFiber NxN 8x8 MIMO Multiplexer(AF-MPx8) 
C100-4 Battery Rack for up to 4 units of 12V/100AH Battery 
