Grandstream UCM6304 IP PBX | 2000 Users & 300 Calls | 4 FXS/FXO Ports
Grandstream UCM6304: A High‑Capacity Audio/Video Communication Hub
The Grandstream UCM6304 is a powerful, audio/video unified communications solution designed to serve as the central hub for large enterprises and growing organizations. Based on the reliable Asterisk version 16 open‑source telephony operating system, it provides a scalable platform that centralizes all essential business communications, including voice calls, video calling, video conferencing, web meetings, instant messaging (IM), mobility features, and intercoms onto one powerful network.
Key Features & Specifications
High Capacity for Large Enterprises – Supports up to 2000 users, 300 concurrent G.711 calls, and 200 concurrent SRTP encrypted calls.
Analog Connectivity – Includes 4 FXO ports for connecting to traditional PSTN telephone lines and 4 FXS ports for connecting analog phones or fax machines. All ports have lifeline capability to maintain basic phone service during a power outage.
Superior Audio & Video Quality – Features the Full‑Band Opus voice codec and supports H.265, H.264, H.263, H.263+, and VP8 video codecs. Advanced jitter resilience technology maintains clear call quality even with up to 50% packet loss.
Seamless Collaboration – Comes with a built‑in platform for audio conferencing, video conferencing, and web meetings, accessible from computers, SIP endpoints, or the free Wave App on desktop, web, and mobile.
Enterprise‑Grade Networking – Three Gigabit auto‑sensing RJ45 ports with integrated PoE+ and NAT router support. Includes USB 3.0 and an SD card interface.
Secure & Reliable – Provides advanced security with secure boot, unique certificate, and random default passwords. Supports hot standby high availability to ensure business continuity.
Remote Work Ready – Automated NAT firewall traversal (UCM RemoteConnect) and GDMS cloud management platform facilitate secure remote connections for distributed teams and simplified system administration from anywhere.
Easy Management – Zero‑configuration provisioning for Grandstream SIP endpoints. Full API available for third‑party integrations, including CRM and PMS platforms.
Why Choose the UCM6304 for Your Business?
For large enterprises, busy call centers, or organizations with a mix of modern IP phones and legacy analog devices, the UCM6304 offers exceptional capacity, features, and reliability.
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Complete UC Solution – Replaces separate systems for VoIP, analog lines, video conferencing, and messaging.
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Future‑Proof & Scalable – Supports up to 2000 users with ample room for business growth.
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Flexible Integration – The available API allows for seamless connection with third‑party applications.
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Unified Management – Manage the entire system through a single, intuitive interface.
The Grandstream UCM6304 delivers a comprehensive, secure, and highly reliable business communication platform tailored for large organizations.
Technical Specifications
Frequently Asked Questions
Q1: How many users can the UCM6304 support for my business in Pakistan? +
It is designed for up to 2000 users, making it perfect for large corporate offices, call centers, or multi‑branch enterprises across Pakistan.
Q2: Does it work with PTCL analog lines and old analog phones? +
Absolutely. The UCM6304 has 4 FXO ports for PSTN lines (like PTCL) and 4 FXS ports for analog phones or fax machines, with lifeline capability to keep basic lines functional during a power outage.
Q3: How good is voice quality on inconsistent Pakistani internet connections? +
Very reliable. It supports Full‑Band Opus and other advanced codecs with jitter resilience up to 50% packet loss, ensuring stable, clear call quality even on fluctuating broadband or 4G networks.
Q4: Can I manage the UCM6304 remotely? +
Yes. The UCM6304 is compatible with GDMS (Grandstream Device Management System) for cloud‑based setup, monitoring, and firmware upgrades. You can also access it securely via HTTPS/SSH.