Description
Spec-first summary of the Grandstream UCM6304 IP PBX appliance: room for 2000 users, 4 FXS ports. Details and our deployment notes follow.
Feature set
- 10/100/1000 switched ports, so the PC behind it keeps full speed
- Accepts PoE from the switch, so a local PSU is optional
- 300 concurrent calls
- 2000 user capacity
- 4 x FXS
- 4 x FXO
- TLS/SRTP or equivalent security support
Deployment scenarios
- Sites that need local survivability
- On-prem PBX builds
- Hybrid cloud and on-site setups
Spec sheet
| Brand | Grandstream |
|---|---|
| Model | UCM6304 |
| Manufacturer part number | UCM6304 |
| Product type | IP PBX Appliance |
| Network | Gigabit Ethernet |
| PoE | Yes |
| Concurrent calls | 300 |
| Users | 2000 |
| FXS ports | 4 |
| FXO ports | 4 |
What ships
Factory package for the UCM6304. Contents per the manufacturer packing list; confirm power and mounting accessories before ordering.
SIP and hosted voice notes
On-prem option: we stage the UCM6304 with your extensions, trunks and dial plan before shipping. Hosted PBX is available if you would rather not run hardware.







