Grandstream UCM6308 IP PBX

Grandstream UCM6308 IP PBX System is a high-capacity enterprise unified communications platform designed for large organizations that need scalable, secure, and centralized voice communication management. It supports up to 3,000 users and up to 450 concurrent calls, making it one of the most powerful models in the UCM6300 series. The system combines VoIP telephony, audio conferencing, messaging, remote connectivity, cloud management, and advanced security in a single on-premises solution, ideal for enterprises, call centers, universities, hospitals, and multi-branch businesses.

Product Features

Supports Up to 3,000 Users and 450 Concurrent Calls

The UCM6308 is engineered for high-density communication environments, supporting up to 3,000 registered users and handling up to 450 simultaneous calls, making it suitable for large enterprises and call centers requiring heavy call traffic handling.

8 FXO and 8 FXS Ports for Hybrid Telephony

It includes 8 FXO ports for PSTN line connectivity and 8 FXS ports for analog devices such as phones and fax machines, allowing smooth integration between traditional telephony systems and modern IP-based communication networks.

Integrated Unified Communications Platform

The system unifies voice calling, audio conferencing, web meetings, messaging, analytics, intercom functionality, and business communication tools into a centralized platform, improving collaboration and operational efficiency across organizations.

Built-In Conferencing and Collaboration

The UCM6308 supports built-in conferencing capabilities with large meeting capacity, enabling businesses to host internal and external meetings without relying on third-party conferencing services.

Wave App for Remote Communication

The Wave application allows users to make calls, join meetings, and communicate via desktop, web browsers, Android, and iOS devices, supporting remote and hybrid working environments.

Cloud Management with GDMS

The system integrates with Grandstream Device Management System (GDMS), enabling centralized provisioning, monitoring, and management across multiple locations and devices.

Zero-Touch Provisioning

Automatic discovery and configuration of Grandstream SIP devices reduces deployment time and simplifies IT administration for large-scale installations.

Advanced Security Protection

The UCM6308 includes enterprise security features such as secure boot, encryption (TLS/SRTP), unique device certificates, and randomized default credentials to protect communications and system access.

High-Speed Gigabit Networking

It is equipped with three Gigabit Ethernet ports supporting flexible network modes including router and switch operation, with PoE+ support for streamlined deployment.

Open API Integration

An open API enables integration with third-party systems such as CRM and PMS platforms, allowing businesses to automate workflows and improve customer management systems.

Asterisk-Based Telephony Platform

The system is built on Asterisk Version 16, offering flexibility, stability, and compatibility with a wide range of SIP devices and VoIP services.

Product Specifications

• Model: Grandstream UCM6308
• Product Type: Enterprise IP PBX System
• Maximum Users: 3,000
• Maximum Concurrent Calls: 450
• FXO Ports: 8 × RJ11
• FXS Ports: 8 × RJ11
• Network Interfaces: 3 × Gigabit Ethernet ports (PoE+ supported)
• NAT Router Support: Yes
• USB Ports: 2 × USB 3.0
• Storage Expansion: 1 × SD card slot
• Display: 128 × 32 LCD display
• Conference Capacity: Up to 300 audio participants (varies by configuration)
• Video Conference Support: Up to 60 participants (platform dependent)
• Telephony Platform: Asterisk Version 16
• Security Protocols: TLS, SRTP, HTTPS, SSH, 802.1X
• Provisioning: Zero-touch provisioning
• Cloud Support: GDMS and RemoteConnect
• Installation Type: Rack mount
• Ideal For: Large enterprises, call centers, universities, hospitals, hotels, and multi-branch organizations