Grandstream UCM6304A – IP PBX with 4 FXO, 4 FXS, 1000 Users & 150 Calls
The Grandstream UCM6304A IP PBX is a high-performance audio communication solution supporting up to 1000 users and 150 concurrent calls. Featuring 4 FXO and 4 FXS ports, built-in audio conferencing and instant messaging, and Gigabit connectivity with PoE+, it is ideal for growing businesses and enterprises.
Description
The Grandstream UCM6304A IP PBX is a powerful audio-focused unified communications platform designed for growing enterprises that require reliable, scalable, and high-quality voice communication. With 4 FXO ports and 4 FXS ports, the system enables seamless integration with traditional PSTN lines and analog devices such as telephones and fax machines, making it ideal for hybrid VoIP deployments.
Supporting up to 1000 users and 150 concurrent calls, the Grandstream UCM6304A IP PBX provides excellent scalability for medium-sized businesses and expanding organizations. As part of the Audio Series, it is optimized for voice communication and collaboration, delivering high-quality audio performance without the need for video conferencing features.
The system includes a built-in collaboration suite with Instant Messaging (IM) and audio web meetings, supporting up to 7 meeting rooms and 120 participants. This makes it an ideal solution for businesses that rely heavily on voice communication and internal collaboration. Additionally, integration with the Grandstream Wave app allows employees to connect remotely using smartphones, tablets, or desktop devices, ensuring seamless communication from anywhere.
For networking, the UCM6304A features three Gigabit Ethernet ports with PoE+ support and an integrated NAT router, offering flexible deployment and reliable performance. Advanced telephony features such as auto-attendant (IVR), call queues, voicemail-to-email, call recording, call forwarding, Do Not Disturb (DND), call park and pickup, and BLF provide a complete professional communication system.
Security is enterprise-grade, including secure boot, unique certificates, random default passwords, and TLS/SRTP/HTTPS encryption, ensuring all communications remain protected. The system also supports UCM RemoteConnect cloud service for secure remote access and management, in addition to compatibility with GDMS for centralized provisioning.
The Grandstream UCM6304A IP PBX includes USB ports and an SD card slot for storage expansion, along with a touchscreen LCD interface for easy management. Its compact design allows for desktop, wall-mount, or rack-adapted deployment.
With no licensing fees, the UCM6304A delivers a cost-effective, scalable, and secure voice communication solution for modern enterprises.
Analog Interfaces:
- 4 × FXO ports (RJ11) for PSTN trunk lines
- 4 × FXS ports (RJ11) for analog phones/fax
- Lifeline support for power failure fallback
Network & Connectivity:
- 3 × Gigabit Ethernet (10/100/1000 Mbps)
- PoE+ support
- Integrated NAT router
Capacity & Performance:
- Up to 1000 users
- Up to 150 concurrent calls (G.711)
- ~120 concurrent calls (SRTP)
Voice Codec Support:
- Opus (full-band)
- G.711, G.722
- G.729
- Advanced jitter resilience up to 50% packet loss
Telephony Features:
- Auto-attendant (IVR)
- Call queues
- Call recording
- Voicemail to email
- Call forwarding & DND
- Call park & pickup
- BLF and paging
Collaboration Features:
- Audio conferencing platform
- Up to 7 meeting rooms
- Up to 120 participants
- Instant messaging (IM) support
- Wave app integration
Cloud & Remote Access:
- UCM RemoteConnect support
- GDMS cloud management
Security Features:
- TLS / SRTP encryption
- HTTPS / secure boot
- Unique device certificates
- Random default passwords
Management & Provisioning:
- Web GUI
- GDMS cloud provisioning
- Remote management support
Hardware & Design:
- 320×240 color LCD touchscreen
- Desktop / wall-mount / rack-adaptable
Ports & Expansion:
- 1 × USB 3.0
- 1 × USB 2.0
- 1 × SD card slot
Power & Environment:
- Power input: 100–240 VAC
- Operating temperature: 0–40°C
Key Features:
- 4 FXO + 4 FXS Ports – Flexible analog integration
- 1000 Users Capacity – Scalable business solution
- 150 Concurrent Calls – High-performance voice system
- Audio Conferencing & IM – Built-in collaboration tools
- Triple Gigabit Ports with PoE+ – Advanced networking
- UCM RemoteConnect Support – Secure remote access
- No Licensing Fees – Cost-effective deployment
- GDMS Cloud Management – Centralized control
- Enterprise Security – TLS, SRTP, secure boot
Technical Datasheet
You can download the full technical documentation for this product from the link below:
Download PDF Datasheet
