Grandstream UCM6304

Overview

The Grandstream UCM6304 is an IP PBX appliance designed to unify voice, video, and data communications into a single platform for businesses. It supports up to 2000 registered users and can handle 300 concurrent calls, making it suitable for small to mid-size companies, branch offices, and institutions like schools and clinics. With four FXO ports for connecting to public telephone lines and four FXS ports for legacy analog devices, it bridges traditional telephony with modern IP communications seamlessly.

Key features

• Four FXO ports enable connection to standard analog phone lines, ensuring compatibility with existing telephony infrastructure.
• Four FXS ports support legacy devices such as fax machines, cordless phones, and overhead paging systems, preserving current equipment investments.
• Built-in video conferencing and web meeting capabilities allow teams to collaborate without additional licensing fees, supporting H.264 and H.265 codecs for efficient, high-quality video streaming.
• Three Gigabit Ethernet ports provide flexible network design options, including PoE+ support to reduce cabling by powering devices over Ethernet.
• A color 320 x 240 LCD touchscreen on the front panel offers quick access to system status and simplifies on-site troubleshooting.
• Browser-based management interface consolidates call routing, security, and user provisioning into one accessible platform for IT administrators.
• API availability allows integration with third-party CRM systems, facility access controls, and surveillance solutions, enhancing overall business workflows.
• Grandstream’s Wave app and UCM RemoteConnect service extend the phone system to mobile devices and laptops, supporting remote and traveling employees effectively.
• No recurring licensing fees for core features ensure predictable budgeting and lower total cost of ownership.

Key specs

• User capacity: up to 2000 registered users
• Concurrent calls: supports up to 300 simultaneous calls
• FXO ports: 4 ports for connecting to public telephone lines
• FXS ports: 4 ports for analog devices like fax machines and paging systems
• Network ports: 3 Gigabit Ethernet ports with PoE+ support
• Video codecs supported: H.264 and H.265 for video conferencing
• Front panel display: 320 x 240 color LCD touchscreen

Connectivity and compatibility

The UCM6304 offers versatile connectivity options to fit into diverse network environments. Its FXO and FXS ports maintain compatibility with traditional telephony and analog devices, while the Gigabit Ethernet ports support high-speed IP communications. PoE+ readiness simplifies installation in locations with power over Ethernet infrastructure, reducing the need for additional power adapters.

• Four FXO ports for PSTN line integration
• Four FXS ports for analog handsets, fax machines, and paging systems
• Three Gigabit Ethernet ports supporting PoE+ for network flexibility
• Supports integration with mobile and desktop devices via Grandstream Wave app and UCM RemoteConnect

Performance and reliability

This appliance is built to handle demanding communication needs with robust call capacity and user support. The inclusion of video conferencing with efficient codecs ensures smooth collaboration without taxing network resources. The front-panel touchscreen and browser-based management tools provide quick diagnostics and easy configuration, helping maintain uptime and streamline IT operations.

Ideal uses and environments

The UCM6304 fits well in growing small to mid-size businesses, branch offices requiring synchronization with headquarters, and institutions like schools, hotels, and clinics that need unified communications without ongoing subscription costs. Its combination of legacy support and modern IP features makes it a strong choice for organizations transitioning to VoIP while retaining existing equipment.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, with tags, manuals, accessories, and original, unaltered packaging. Any item kept will be deducted from the refund. Start a return by sending us an email. Items sent back without approval may be refused or returned to the sender.

Some items are not returnable: opened TVs/combos/monitors 37″+, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method; allow 5–7 business days for the credit to post. Shipping, handling, customs duties, and import taxes are nonrefundable. If an item is used, incomplete, or not in original condition, a 30% restocking fee may apply. Direct exchanges are not offered; purchase the replacement and return the original for a refund.

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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