Grandstream UCM6308A IP PBX Unified Communications System

The Grandstream UCM6308A is a powerful and scalable unified communication and collaboration system designed for enterprises that demand advanced voice, conferencing, and management capabilities. It integrates voice, IM, conferencing, data, and remote connectivity within a single robust platform. Supporting up to 1,500 users and 200 concurrent calls, it delivers enterprise-grade reliability and flexibility through advanced security protocols, intuitive management, and cloud integration via UCM RemoteConnect.

Product Features

High-Capacity Communication Platform

Supports up to 1,500 users and 200 concurrent calls, with up to 9 meeting rooms and 150 conference participants — ideal for large organizations.

Comprehensive Unified Collaboration

Combines voice, instant messaging (IM), and web/audio conferencing with the Wave App, enabling communication across desktops, browsers, and mobile devices.

UCM RemoteConnect Cloud Integration

Provides a hybrid on-premise and cloud-managed communication platform with automated NAT firewall traversal for secure and reliable remote connectivity.

Enhanced Security Protection

Features secure boot, unique device certificates, and random default passwords to safeguard accounts and communication sessions.

Extensive Connectivity Options

Includes 8 FXS ports and 8 FXO ports with lifeline capability, three Gigabit auto-sensing RJ45 network ports with PoE+, 2× USB 3.0, and SD card interface for storage and expansion.

Built-in Reliability and Redundancy

Supports Hot Standby High-Availability, local dual deployment, and zero-configuration provisioning of Grandstream SIP endpoints for minimal downtime.

API and Third-Party Integration

Open API for integration with CRM and PMS systems, allowing seamless connection with existing business platforms.

Advanced Audio Technology

Based on Asterisk version 16, supporting full-band Opus voice codec, 50% jitter resilience, and carrier-grade line echo cancellation for superior call clarity.

User-Friendly Interface

Equipped with a 320×240 color LCD touchscreen for easy navigation and system monitoring.

Multilingual Support

Supports multiple languages for both Web UI and customizable IVR prompts, accommodating global deployment.

Product Specifications

• Model: UCM6308A
• Users: Up to 1,500
• Concurrent Calls (G.711): Up to 200
• Max SRTP Calls: 150
• Meeting Rooms: 9
• Max Conference Participants: 150

Interfaces

• 8× RJ11 FXS Ports (lifeline capable)
• 8× RJ11 FXO Ports (lifeline capable)
• 3× Gigabit auto-sensing RJ45 ports with PoE+
• 2× USB 3.0 ports
• 1× SD Card interface

Display & Indicators

• 320×240 Color LCD Touchscreen
• Power, FXS, FXO, LAN, WAN, Heartbeat LEDs

Audio & Voice

• Voice Codecs: Opus, G.711 A-law/U-law, G.722, G.723.1, G.726-32, G.729A/B, iLBC, GSM, T.38
• Echo Cancellation: 128 ms-tail carrier-grade LEC with NLP
• Jitter Buffer: Dynamic (up to 50% resilience)
• Encryption: SRTP, TLS, HTTPS, SSH, 802.1X

Networking

• Supports NAT Router (switch or router mode)
• TCP/UDP/IP, RTP/RTCP, STUN, SRTP, TLS, DHCP, NTP, PPPoE, IPv6, OpenVPN®

System

• Telephony OS: Asterisk 16
• QoS: Layer 2 (802.1Q, 802.1p) & Layer 3 (ToS, DiffServ, MPLS)
• Provisioning: ZeroConfig, AES-encrypted XML configuration, GDMS compatible

Power

• Dual DC 12V Power Jacks
• Input: 100–240VAC, 50/60Hz
• Output: DC 12V, 2A

Physical

• Dimensions: 485 × 187.2 × 46.2 mm
• Unit Weight: 2.54 kg
• Package Weight: 3.46 kg
• Mounting: Rack mount & Desktop

Environment

• Operating Temperature: 0–45°C
• Storage Temperature: -10–60°C
• Humidity: 10–90% (non-condensing)

Certifications

• FCC, CE, IC, RCM Compliant
• Power Adapter Certified: UL 62368-1