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Grandstream IP PBX Comparison Charts

Grandstream makes on-premise VoIP phone systems that bring enterprise-worthy feature sets to SMBs and other organizations looking for cost-effective on-premise VoIP communications solutions. Grandstream currently produces UCM6300 Series IP PBXs, either of which can be used with Grandstream UCM RemoteConnect for connecting remote workers and the free Grandstream Wave app for Android and iOS smartphones. There are two UCM6300 Series, one of which supports video conferencing and the other of which supports only audio calls:

 
Grandstream UCM6300 Series IP PBXs

Grandstream UCM6300 Series

The following comparison chart displays all four current models of Grandstream UCM6300 Series IP PBXs:

 Grandstream
UCM6301		Grandstream
UCM6302		Grandstream
UCM6304		Grandstream
UCM6308
VoIP Protocol SIP SIP SIP SIP
Call Capacity
  • Users: up to 500
  • Calls: up to 75 concurrent
  • Users: up to 1,000
  • Calls: up to 150 concurrent
  • Users: up to 2,000
  • Calls: up to 300 concurrent
  • Users: up to 3,000
  • Calls: up to 450 concurrent
Video
Conferencing
  • Rooms: up to 4 concurrent
  • Participants: up to 75 concurrent
  • Feeds: up to 9 concurrent
  • Rooms: up to 8 concurrent
  • Participants: up to 150 concurrent
  • Feeds: up to 9 concurrent
  • Rooms: up to 15 concurrent
  • Participants: up to 200 concurrent
  • Feeds: up to 9 concurrent
  • Rooms: up to 25 concurrent
  • Participants: up to 300 concurrent
  • Feeds: up to 9 concurrent
Wave App
  • Desktop: Windows, macOS
  • Mobile: Android, iOS
  • Web: Chrome, Firefox
  • Desktop: Windows, macOS
  • Mobile: Android, iOS
  • Web: Chrome, Firefox
  • Desktop: Windows, macOS
  • Mobile: Android, iOS
  • Web: Chrome, Firefox
  • Desktop: Windows, macOS
  • Mobile: Android, iOS
  • Web: Chrome, Firefox
FXS Ports 1x RJ11 2x RJ11 4x RJ11 8x RJ11
FXO Ports 1x RJ11 2x RJ11 4x RJ11 8x RJ11
Ethernet Ports 3x Gigabit PoE+ 3x Gigabit PoE+ 3x Gigabit PoE+ 3x Gigabit PoE+
NAT Router Router mode, Switch mode Router mode, Switch mode Router mode, Switch mode Router mode, Switch mode
Auto Attendant
(IVR)		 Up to 5 layers Up to 5 layers Up to 5 layers Up to 5 layers
Third-Party
CRM/PMS
Integration		 API available API available API available API available
Operating
System		 Based on Asterisk 16 Based on Asterisk 16 Based on Asterisk 16 Based on Asterisk 16
Mounting Wall mount, Desktop Wall mount, Desktop Rack mount, Desktop Rack mount, Desktop
 
Grandstream UCM6300 Audio Series IP PBXs

Grandstream UCM6300 Audio Series

The following chart displays all four current models of Grandstream UCM6300 Audio Series IP PBXs:

 Grandstream
UCM6300A		Grandstream
UCM6302A		Grandstream
UCM6304A		Grandstream
UCM6308A
VoIP Protocol SIP SIP SIP SIP
Call Capacity
  • Users: up to 250
  • Calls: up to 50 concurrent
  • Users: up to 500
  • Calls: up to 75 concurrent
  • Users: up to 1,000
  • Calls: up to 150 concurrent
  • Users: up to 1,500
  • Calls: up to 200 concurrent
Conference
Bridges
  • Meeting Rooms: 3
  • Parties: up to 50
  • Meeting Rooms: 5
  • Parties: up to 75
  • Meeting Rooms: 7
  • Parties: up to 120
  • Meeting Rooms: 9
  • Parties: up to 150
Wave App
  • Desktop: Windows, macOS
  • Mobile: Android, iOS
  • Web: Chrome, Firefox
  • Desktop: Windows, macOS
  • Mobile: Android, iOS
  • Web: Chrome, Firefox
  • Desktop: Windows, macOS
  • Mobile: Android, iOS
  • Web: Chrome, Firefox
  • Desktop: Windows, macOS
  • Mobile: Android, iOS
  • Web: Chrome, Firefox
FXS Ports — 2x RJ11 4x RJ11 8x RJ11
FXO Ports — 2x RJ11 4x RJ11 8x RJ11
Ethernet Ports 3x Gigabit PoE+ 3x Gigabit PoE+ 3x Gigabit PoE+ 3x Gigabit PoE+
NAT Router Router mode, Switch mode Router mode, Switch mode Router mode, Switch mode Router mode, Switch mode
Auto Attendant
(IVR)		 Up to 5 layers Up to 5 layers Up to 5 layers Up to 5 layers
Third-Party
CRM/PMS
Integration		 API available API available API available API available
Operating
System		 Based on Asterisk 16 Based on Asterisk 16 Based on Asterisk 16 Based on Asterisk 16
Mounting Wall mount, Desktop Wall mount, Desktop Wall mount, Desktop Rack mount, Desktop