The Grandstream UCM6204 has been phased out and is no longer available for purchase. The suggested replacement is the Grandstream UCM6304.

Connect up to 500 SIP endpoints using the Grandstream UCM6204 IP-PBX. This compact VoIP appliance brings enterprise-grade audio, video and data control in a cost-effective and easy-to-use device, which features 2 Gigabit Ethernet, 2 FXS and 4 FXO ports. Using the UCM6204, you can centralize all of your business's communications. It supports up to 45 audio calls or 30 WebRTC sessions happening simultaneously, as well as 3 password-protected conference bridges with a maximum of 25 concurrent PSTN or IP participants per bridge.

Your communications will be secure, with a combination of SRTP, TLS and HTTPS encryption protecting your data. Grandstream UCM6204 supports the open SIP standard, as well as a broad range of audio, video and fax codecs. Layer 2 and Layer 3 Quality of Service (QoS) functionality allows you to prioritize data to ensure better communication. It is a 802.3at PoE+ device, and comes with a 12V power adapter. It can be mounted on a wall or placed on a desk.

Grandstream UCM6204 IP-PBX Quick Specs:

• SIP Users: 500
• Concurrent Audio Calls: 45
• Concurrent WebRTC Sessions: 30
• Conference Bridges: 3
• Users Per Bridge: 25
• Ethernet Ports: 2x 10/100/100 Gigabit
• PoE: 802.3at PoE+
• FXS Ports: 2
• FXO Ports: 4
• Additional Ports: USB, SD
• NAT Router: yes
• Display: 128 x 32 px graphic LCD
• Audio/Fax Codecs: G.711μ/a, G.722, G.723.1, 5.3K/6.3K, G.726, G.729AB, iLBC, GSM, G.726-32, ADPCM, T.38
• Video Codecs: H.264, H.263, H.263+, VP8
• QoS: Layer 2 & 3

Grandstream UCM-6204 500 Users 45 Concurrent Calls IP-PBX Package Contents:

• UCM6204 main case
• 12V power adapter
• Ethernet cable
• Quick installation guide
• GPL license