Grandstream UCM6308 IP PBX

The Grandstream UCM6308 IP PBX is a powerful, enterprise-grade communications server designed to unify voice, messaging, conferencing, and collaboration for up to 3,000 users and 450 concurrent calls. With 8 FXS and 8 FXO ports, gigabit PoE+ networking, and built-in secure remote access via Wave app and UCM RemoteConnect, it delivers scalable performance for demanding business environments — all with no licensing fees.

 Key Features

• Supports up to 3,000 users and 450 concurrent calls

• 8 FXS and 8 FXO ports for analog/PSTN integration

• 3 Gigabit ports with PoE+ and routing/switching options

• Built-in Wave app for voice, video, and chat collaboration

• UCM RemoteConnect for secure cloud-assisted remote access

• Audio conferencing for up to 300 participants

• Video conferencing for up to 60 users per session

• Color LCD touchscreen for local system control

• Secure boot, SRTP, TLS, HTTPS encryption for maximum security

• Hot-standby failover for high availability setups

• Advanced call handling: IVR, call queues, recording, voicemail-to-email

• REST API support for third-party integrations (CRM/PMS)

• Cloud provisioning via GDMS

• Built on Asterisk 16 for open-source flexibility