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Grandstream Audio Series UCM6300A IP PBX supports250 users and includes a built-in instant messaging. NO VIDEO CONFERENCING
Grandstream Audio Series UCM6302A IP PBX Supporting 2x FXO, 2x FXS Ports, 500 Users, Supports Full-Band Opus Voice Vodec
Grandstream Audio Series UCM6304A IP PBX Supporting 4x FXO, 4x FXS Ports, 1000 Users, Supports Full-Band Opus Voice Codec
Grandstream GCC6000 Built-in IPPBX (10 Users, 4 Concurrent Calls) + enterprise-grade firewall + VPN Router + 2 x 2.5 Gb, 5 x GigE Network Switch
Grandstream UCM6301, IP PBX, 1 x FXO Port, 1 x FXS Port, Supports Up To 500 Extensions, 75 Concurrent Calls, 1 x USB, NAT Router
Grandstream UCM6302 IP PBX Supporting 2x FXO, 2x FXS Ports, 1000 Users, H.264/H.263/ H.263+/H.265/VP8 Video Codec
Grandstream UCM6304 IP PBX Supporting 4x FXO, 4x FXS Ports, 1000 Users, Supports Full-Band Opus Voice Codec, H.264/H.263/ H.263+/H.265/VP8 Video Code
Grandstream UCM6510 IP PBX Enterprise-grade Appliance, 50 SIP Trunk Accounts and 200 Concurrent Calls, 2x RJ11 PSTN Line FXO Ports
