Grandstream UCM6308A Audio Series IP PBX

Grandstream UCM6308A Audio Series IP PBX is a high-performance unified communication solution designed for medium and large enterprises that require scalable VoIP telephony, SIP trunking, audio conferencing, messaging, and centralized communication management. Built to support modern business communication environments, the UCM6308A combines IP telephony, conferencing, mobility, remote collaboration, and advanced security into a single enterprise-grade platform. With support for up to 1500 users and 200 concurrent calls, integrated FXO and FXS ports, cloud management compatibility, and high-availability support, this IP PBX delivers reliable and secure communication infrastructure for organizations with demanding communication requirements.

Product Features

Supports Up to 1500 Users and 200 Concurrent Calls

The UCM6308A is engineered for enterprise-scale deployments, supporting up to 1500 SIP users and 200 simultaneous calls to accommodate large offices, institutions, and multi-site organizations.

Integrated 8 FXO and 8 FXS Analog Ports

Equipped with 8 FXO and 8 FXS interfaces, the system supports PSTN lines, analog telephones, fax machines, and hybrid telephony deployments that combine traditional and IP communication systems.

Unified Communication and Collaboration Platform

The platform integrates VoIP calling, instant messaging, audio conferencing, mobility tools, intercom functionality, and remote collaboration into one centralized communication environment.

Built-In Audio Conferencing and Web Meetings

The UCM6308A includes an integrated conferencing platform supporting multiple meeting rooms and remote participants across desktop, mobile, and SIP devices.

Free Wave App for Remote Communication

Grandstream Wave applications enable users to access calls, conferencing, and messaging services through Windows, macOS, Android, iOS, and supported web browsers for improved remote productivity.

Zero-Touch Provisioning for SIP Devices

Automatic provisioning simplifies deployment and management of compatible Grandstream SIP endpoints, reducing installation time and administrative complexity.

Enterprise-Grade Security Protection

Advanced security technologies including secure boot, TLS and SRTP encryption, randomized default passwords, unique certificates, and firewall traversal help secure voice traffic and communication accounts.

Gigabit Networking with Integrated PoE+

The system includes three Gigabit auto-sensing Ethernet ports with integrated PoE+ support, enabling flexible and high-speed network deployment.

Cloud Management and Remote Access Support

Compatibility with Grandstream Device Management System (GDMS) and UCM RemoteConnect allows centralized cloud provisioning, monitoring, and remote administration.

High Availability and Business Continuity Support

The UCM6308A supports hot standby high-availability deployment and local dual deployment to improve uptime and communication reliability.

Asterisk-Based Open Telephony Platform

Built on Asterisk version 16, the PBX supports SIP interoperability, CRM integration, PMS integration, and API customization for flexible business communication deployment.

Product Specifications

• Product Name: Grandstream UCM6308A Audio Series IP PBX
• Model: UCM6308A
• System Type: Unified IP PBX Appliance
• Communication Type: Audio-only unified communication platform
• Supported Users: Up to 1500 users
• Concurrent Calls: Up to 200 simultaneous calls
• Secure SRTP Calls: Up to 150 concurrent secure calls
• Conference Capacity:
  • Up to 9 conference rooms
  • Up to 150 conference participants
• FXO Ports:
  • 8 x RJ11 FXO ports
• FXS Ports:
  • 8 x RJ11 FXS ports
• Network Interfaces:
  • 3 x Gigabit auto-sensing RJ45 Ethernet ports
• PoE Support: Integrated PoE+
• NAT Router Support: Yes
• USB Interfaces:
  • 2 x USB 3.0 ports
• Storage Expansion:
  • 1 x SD card slot
• Display:
  • 320 x 240 color touchscreen LCD
• Supported Audio Codecs:
  • Opus
  • G.711 A-law/U-law
  • G.722
  • G.729
  • iLBC
  • GSM
• Fax Support:
  • T.38 fax
• Security Features:
  • Secure boot
  • TLS encryption
  • SRTP encryption
  • HTTPS and SSH support
  • Unique security certificates
  • Randomized default passwords
• QoS Support:
  • Layer 2 QoS (802.1Q, 802.1p)
  • Layer 3 QoS (ToS, DiffServ, MPLS)
• Remote Access Support:
  • UCM RemoteConnect
  • GDMS cloud management
• Provisioning Support:
  • Zero-touch provisioning
  • Auto-discovery for SIP devices
• Telephony Platform:
  • Asterisk version 16
• Third-Party Integration:
  • CRM integration
  • PMS integration
  • API support
• Supported Platforms:
  • Windows
  • macOS
  • Android
  • iOS
  • Web browsers
• Power Input:
  • Dual 12V DC power adapters
  • 100–240V AC input
• Mounting Options:
  • Rack mount
  • Desktop installation
• Color: Black
• Warranty: Manufacturer limited warranty