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Rectangular black metal network appliance with front panel ports and indicator lights

Grandstream

Grandstream UCM6308 IP PBX 8 FXO 8 FXS VoIP

SKU CH-MVY3-CA1ET

IP PBX appliance supporting 3000 users and 450 concurrent calls with built-in conferencing, Wave collaboration app and secure remote access

  • TypeAccessories
  • Scales to 3000 users for growing enterprises
  • Handles 450 simultaneous calls during peak demand
  • Zero-config provisioning gets Grandstream SIP endpoints online instantly
  • Built-in meetings platform works across desktop, Wave app and SIP endpoints
  • Three Gigabit RJ45 ports with PoE+ simplify network cabling

Grandstream UCM6308 IP PBX with 8 FXO and 8 FXS

The Grandstream UCM6308 is an on-premise IP PBX appliance designed for businesses that need to unify voice, video, conferencing and collaboration on a single platform. It supports up to 3000 users and 450 concurrent calls, making it suitable for medium to large enterprises. Zero-configuration provisioning simplifies deployment with Grandstream SIP endpoints.

Three Gigabit RJ45 ports with PoE+ and NAT router

The unit provides three auto-sensing Gigabit network ports with integrated PoE+ and a built-in NAT router for network connectivity. Automated NAT firewall traversal secures remote connections without manual port forwarding. An API enables integration with third-party CRM and PMS platforms for custom workflows.

Supports 3000 users and 450 concurrent calls

The system comfortably handles up to 3000 registered users and 450 simultaneous calls for voice, video and web meetings. Built-in conferencing works across desktop, mobile Wave apps and SIP endpoints. Organisations requiring capacity beyond these limits or a purely cloud-hosted PBX model should consider alternative architectures.

Highlights

  • Scales to 3000 users for growing enterprises
  • Handles 450 simultaneous calls during peak demand
  • Zero-config provisioning gets Grandstream SIP endpoints online instantly
  • Built-in meetings platform works across desktop, Wave app and SIP endpoints
  • Three Gigabit RJ45 ports with PoE+ simplify network cabling

Specifications

TypeAccessories

Questions about this item

Which UCM6300 model should I choose for a site that needs eight analogue trunk ports and eight analogue extensions?

The UCM6308 provides exactly eight FXO ports for PSTN trunks and eight FXS ports for analogue phones or fax machines, matching that port-count requirement.

What does the 450 concurrent-call figure mean for daily operation?

It means the appliance can handle up to 450 simultaneous voice or video conversations without blocking new calls, supporting busy contact-centre or multi-site deployments.

What do the three Gigabit RJ45 ports with PoE+ actually provide?

They give three 1 Gbps Ethernet links, each able to supply PoE+ power to attached devices such as IP phones or cameras, and they support NAT routing for the local network.

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