Grandstream UCM6304 IP PBX Server w/4FXO and 4FXS Ports
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20,000+★★★★★5 Star Reviews
Free Shipping on Orders of $500+ *
Satisfaction Guaranteed
Grandstream UCM6304 is an enterprise grade IP PBX appliance for business communications — with no license fees. UCM6304 enables VoIP telephony and video conferencing for up to 2000 users and 300 concurrent calls (200 when using SRTP encryption) with an integrated conference bridge for up to 200 participants in an audio conference and up to 4 rooms and 40 participants in a video conference at 1080p Full HD resolution. Perfect for a medium to large business who want to control their communications, UCM6304 supports HD video conferencing with a full suite of features — screen sharing, whiteboarding and more.
Features
- Enterprise-Grade Unified Communication Solution
- IP PBXs allows businesses of all sizes to build powerful and scalable unified communication solutions in an easy-to-manage fashion with no licensing fees
- Analog Telephone FXS Ports: 4 RJ11 Port
- PSTN Line FXO Ports: 4 RJ11 Port
- Users: 2000
- Concurrent calls: 300
- Max concurrent SRTP calls: 200
- Video Conference: Up to 30
- Voice Conference: Up to 120
- Three self-adaptive Gigabit ports (switched, routed or dual card mode) with PoE+
- 1USB 2.0, 1USB 3.0, 1SD card interface
- 320x240 color LCD with touch screen for Shortcut Keys and Scroll Bar
Included
- UCM6304 Appliance
- Ethernet Cable
- 2x 12 V Power Adapters
- Quick Installation Guide

New Product
These products are brand new and have never been used. They arrive in the original manufacturer packaging in pristine, factory-fresh condition.
No-hassle returns. Zero restocking fees.
Wrong item? Changed your mind? Don't need it anymore? We've got you covered.
30-Day Returns
- No restocking fees, ever
- Refund or store credit — your choice
- 30 days from invoice date
- Return in original condition, securely packed
Fast Shipping
- Ships within 2 business days*
- Rush & Saturday delivery available — call us
- Free ground shipping available (continental US orders over $500)
- Overnight delivery available
1-Year Warranty
- Covers defects & functional failures
- Normal business use, from date of purchase
- Batteries: 90 days (consumable)
- Excludes misuse, modification, mishandling
Need help finding the right product?
Our team is ready with expert support before and after your purchase.
*Shipping and delivery on business days. Purchaser is responsible for return shipping costs and insurance. Free/fixed shipping offers exclude palletized items — call for freight rates.































































