Grandstream UCM6308 IP PBX

Grandstream UCM6308 is the 8-port model in the official UCM6300 series of on-premise IP PBXs. Official series datasheet values for UCM6308: 8 RJ11 FXS ports and 8 RJ11 FXO ports (all with lifeline capability in case of power outage), three self-adaptive Gigabit network interfaces (switched, routed, or dual mode) with PoE+, NAT router support, rack-mount and desktop mounting, and a 128×32 dot-matrix graphic LCD with DOWN and OK buttons.

Maximum call capacity for UCM6308: 3000 users, 450 concurrent calls (G.711), and 300 max concurrent SRTP calls (G.711). Meeting capacity: unlimited meeting rooms (up to 25 simultaneous public rooms), maximum of 300 simultaneous participants, and up to 9 video feeds. Peripheral ports: 2× USB 3.0 and 1× SD card interface. Power: 2× DC 12V jacks; input 100–240 VAC, 50/60 Hz; output DC 12V, 2A. Dimensions 485 × 187.2 × 46.2 mm; unit weight 2550 g (package 3320 g). Operating 0–45 °C, humidity 10–90% non-condensing.

The UCM6300 series is based on Asterisk version 16, supports zero-configuration provisioning of Grandstream SIP endpoints, and includes the Wave app and a built-in conferencing/meetings platform. Voice/fax codecs include Opus, G.711, G.722, G.729A/B, iLBC, GSM, and T.38; video codecs include H.265, H.264, H.263, H.263+, and VP8.