Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 12 - Jul 17
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Grandstream UCM6304 Unified Communication PBX with 4 FXS & 4 FXO PortsEmpower Your Business with a Unified Communications Hub The Grandstream UCM6304 is a powerful and scalable IP PBX appliance designed to be the central hub of your business communication network. This enterprise grade solution unifies all your communication channels, including voice, video calling, video conferencing, web meetings, and more, onto a single, manageable platform. With support for up to 2,000 users and 300 concurrent calls, the UCM6304 is
Empower Your Business with a Unified Communications Hub
The Grandstream UCM6304 is a powerful and scalable IP PBX appliance designed to be the central hub of your business communication network. This enterprise-grade solution unifies all your communication channels, including voice, video calling, video conferencing, web meetings, and more, onto a single, manageable platform. With support for up to 2,000 users and 300 concurrent calls, the UCM6304 is built to handle the demands of a growing business without requiring any licensing fees. Its robust suite of features provides a comprehensive communication and collaboration solution for both on-site and remote teams.
Key Features and Benefits:
- All-in-One Communication Platform: Integrates voice, video, data, and mobility to streamline your business communications.
- High Capacity and Performance: Supports up to 2,000 users and 300 concurrent calls, with up to 200 using SRTP encryption.
- Built-in Conferencing: Host video conferences with up to 40 participants and audio conferences with up to 200 participants.
- Flexible Connectivity: Features 4 FXO ports for PSTN lines and 4 FXS ports for analog devices, ensuring compatibility with traditional telephony.
- Advanced Security: Your communications are protected by a secure boot, unique certificates, and random default passwords.
- Remote Collaboration: The Wave app for desktop and mobile allows your team to stay connected and collaborate from anywhere.
- Effortless Management: Can be managed through the Grandstream Device Management System (GDMS) for cloud-based setup and monitoring.
Technical Specifications
| Category | Specification |
|---|---|
| Analog Ports | 4 x RJ11 FXS Ports, 4 x RJ11 FXO Ports (with lifeline capability) |
| Network Interfaces | 3 x Self-adaptive Gigabit ports with integrated PoE+ and NAT router |
| Peripheral Ports | 2 x USB 3.0, 1 x SD card interface |
| Capacity | Users: 2,000 Concurrent Calls: 300 Concurrent SRTP Calls: 200 |
| Conferencing | Video Conference: Up to 4 rooms and 40 parties (1080p) Voice Conference: Up to 200 parties |
| Voice-over-Packet Capabilities | LEC with NLP, 128ms-tail-length echo cancellation, Dynamic Jitter Buffer, Modem detection, Auto-switch to G.711 |
| Voice and Fax Codecs | G.711µ/a, G.722, G.723.1, G.726, G.729A/B, iLBC, Opus |
| Video Codecs | H.264, H.263, H.263+, H.265, VP8 |
| Display | 320x240 color LCD with touch screen |
| Provisioning and Control | GDMS for cloud setup, management, and monitoring. Web GUI for local control. |
| Security | Secure boot, unique certificate, random default password, SRTP, TLS, HTTPS. |
| Power | Universal Power Supply; Input: 100 ~ 240VAC, 50/60Hz; Output: DC 12V, 2A |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 66 reviews
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Product Reviews
★★★★★ 4
Comfortable athletic dress with detached shorts
Color: Black, Size: 11-12 Years
I really like that the shorts are not attached. It makes bathroom breaks and outfit changes much easier with less hassle. The dress itself is thin and lightweight, which works well for warmer weather. The material feels good quality and breathable, and it stretches enough for movement during sports. This dress is definitely cute enough for casual wear as well.
The size chart is accurate and the fit was just right. The separate shorts provide good coverage and are functional for activities like tennis or school sports. Overall, this dress works well for active wear, holds up nicely, and is worth the money for the comfort and design.
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Reviewed in the United States on February 26, 2026
★★★★★ 5
Simplicity at its best for the Tennis loving Girl
Color: White, Size: 7-8 Years
Pros:
- this is a very chic and simple White Tennis dress - and stands out for its classic look!
- The fit was perfect for my 4’ 8 girl and a very comfortable fit.
- the dress also comes with a matching pair of shorties with a pocket / pouch for a phone or keys.
- the fabric is very soft on the skin and is more technical in nature - means it can breathe well and perspiration vents out.
- the material is also very stretchable - imp for playing the game and moving around daily.
- I have put it through couple of rounds of washings and it has held well till date.
Cons:
Nothing that I can think of - durability and quality seem to hold , offering good value for money.
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Reviewed in the United States on February 12, 2026
★★★★★ 5
Nice modest sporty dress
Color: Navy Blue, Size: 11-12 Years
Nice soft dress with separate shorts. I love the color. We ordered a size 11-12 and it fits great. I wish it were a little more structured but it is very modest.
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Reviewed in the United States on March 4, 2026
★★★★★ 5
Adorable dress and fictional too
Color: Navy Blue, Size: 9-10 Years
This tennis dress is absolutely adorable and exactly what I look for in kids’ active wear. It’s modest, practical, and cute all at once! My daughter loves it, and the built-in shorts with pockets make it perfect for running, playing golf, pickleball, or just everyday summer fun.
The material is soft, breathable, and moisture-wicking, so she stays comfortable even on hot days. I got size 9-10, which fits true to size. For reference, my 8-year-old is 52” and 63 lbs, and there’s still room to grow. This has quickly become a go-to outfit for summer activities because it’s stylish, functional, and kid-approved.
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Reviewed in the United States on February 8, 2026
★★★★★ 5
Stylish, comfortable, breathable, and fast drying! Perfect for active wear!
Color: Black, Size: 13-14 Years, Color: Black, Size: 13-14 Years
This tennis dress/set is perfect for my daughter. She can use it for tennis, golf, or just as an addition to her summer wardrobe. It fits true to size (though it does run a bit long), and it looks great on. The fabric is very soft and stretchy (a polyester and spandex blend). It’s also very breathable and quick drying, and I love that it’s machine washable. I also like that the shorts are not sewn in (instead it’s a two piece outfit). The shorts also have pockets large enough to fit tennis balls on both hips. The neckline is high and modest, and the skirt is loose and flowy. The dress and shorts are well made and durable too. Because it’s so lightweight, it’s great to wear even in hot and humid weather. The pullover design makes it easy to put on and take off. This dress is a great addition to any active girl’s wardrobe, and it’s a great value too. And it’s available in sizes from 7/8 to 13/14 and several different colors too!
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Reviewed in the United States on January 13, 2026