Grandstream UCM6304 IP PBX System – 2000 Users, 300 Concurrent Calls, 4 FXO & 4 FXS Ports | UCM6304

Grandstream UCM6304 IP PBX System – 2000 Users, 300 Concurrent Calls, 4 FXO & 4 FXS Ports | UCM6304

The Grandstream UCM6304 is a high-capacity Audio and Video IP PBX system designed for medium to large businesses, enterprises, hotels, call centres and multi-location offices. Supporting up to 2,000 SIP users and 300 concurrent calls, it offers advanced business communication features, including call routing, interactive voice response (IVR), voicemail, call recording, call queues and video conferencing. Equipped with 4 FXO ports, 4 FXS ports, three Gigabit Ethernet interfaces with PoE+ and flexible storage options, the UCM6304 delivers a scalable and reliable unified communication solution.

Key Features

• ☎️ 2,000 SIP Users: Supports up to 2,000 registered users and extensions.

• 📞 300 Concurrent Calls: Handles up to 300 simultaneous G.711 calls.

• 🔌 4 FXO Ports: Connects traditional PSTN telephone lines.

• ☎️ 4 FXS Ports: Connects analogue telephones and fax machines.

• 🌐 3 Gigabit Ethernet Ports: Network connectivity with integrated PoE+.

• 🎙️ Advanced IVR: Supports up to 64 layers of interactive voice response.

• 🎧 Call Centre Features: Call queues and automatic call distribution (ACD).

• 👥 Audio Conferencing: Supports up to 120 simultaneous participants.

• 🎥 Video Conferencing: Supports business video communication and collaboration.

• 🔐 Advanced Security: TLS, SRTP, HTTPS, SSH and 802.1X.

• 📱 Grandstream Wave App: Desktop, web and mobile communication.

• ☁️ Centralized Management: Supports Grandstream GDMS cloud management.

• 💾 Storage Support: Two USB 3.0 ports and one SD card interface.

• 🔋 Lifeline Support: FXO and FXS ports support telephone connectivity during power outages.

• 🗄️ Rackmount Design: Suitable for professional server racks and business communication cabinets.

  Technical Features

  Specification	Details
  Brand	Grandstream
  Model	UCM6304
  Product Type	Audio & Video IP PBX System
  PBX Platform	Asterisk-Based
  Maximum SIP Users	2,000
  Maximum Concurrent Calls	300
  Maximum SRTP Calls	200
  FXO Ports	4 × RJ11
  FXS Ports	4 × RJ11
  FXO / FXS Lifeline	Yes
  Network Interfaces	3 × Gigabit Ethernet
  PoE Support	Integrated PoE+
  NAT Router	Yes
  Audio Conference	Up to 120 Participants
  Conference Rooms	Up to 7 Simultaneous Public Rooms
  IVR	Up to 64 Layers
  Call Centre	Call Queues and Automatic Call Distribution
  Voice Codecs	Opus, G.711, G.722, G.723.1, G.726, G.729A/B, iLBC, GSM
  Video Codecs	H.264, H.263, H.263+, H.265, VP8
  Fax Support	T.38
  Security	TLS, SRTP, HTTPS, SSH, 802.1X
  USB Ports	2 × USB 3.0
  Memory Expansion	SD Card Slot
  LCD Display	128 × 32 Dot Matrix
  Mobile Application	Grandstream Wave
  Cloud Management	GDMS
  Power Supply	12V DC, 2A
  Dimensions	485 × 187.2 × 46.2mm
  Unit Weight	Approx. 2.49kg
  Operating Temperature	0°C to 45°C
  Mounting	Rack Mount / Desktop