200 - 1500 users VoIP PBX (Private Branch Exchange) phone systems comparison

Feature / Model	Swift IP PBX Family	Swan CXW2000	Blue Steel CXT3000	Blue Steel CXT4000	Software PBX (CompletePBX virtual machine)

Software	CompletePBX5 software, free upgrade under warranty / service agreement	CompletePBX5 software, free upgrade under warranty / service agreement	CompletePBX5 software, free upgrade under warranty / service agreement	CompletePBX5 software, free upgrade under warranty / service agreement	CompletePBX VM, available for VMware, Hyper-V and Oracle VirtualBox, free upgrade under warranty / service agreement
Max. digital ports	8 via Astribank	up to 8 Integral
Hot Swappable Disks					-
RAID1 (2 HDDs)					-
Intelligent Platform Mgmt Interface (IPMI)					-
Rapid Recovery		CompletePBX5 software, free upgrade under warranty			VM snaphot
Internal backup and restore					VM snaphot
Power supply notification					-
Front panel LCD and keypad					-
Front panel USB access					-
Hot swappable power supply					-
Fan redundancy	Fanless	Fanless			-
Astribank power feed					-
Analog Line Failover	via Astribank / gateway				-
Mass storage	32 GB	250 GB	2 x hot swappable 250 GB SSD/ 500 GB SSD	2 x hot swappable 250 GB SSD/ 500 GB SSD	-
Ethernet ports			2-3 x 1 GB	2-3 x 1 GB	-
BRI ISDN	1 via Astribank	up to 2 Integral	16	16	via gateway
E1/T1 PRI, E1 R2, T1 CAS	1 x 1 GB	2 x 1 GB	16	24	via gateway
Size	13 cm x 9 cm x 3 cm	1U	19" 2U	19" 2U	-
Max. concurrent calls (PRI + FXS)		60	480	750	-
Max. concurrent calls (SIP only)	200	200	550	880	based on resources
Max. analog ports (FXS, FXO)	up to 4 FXO (integral) up to 4 FXO/FXS via Astribank	up to 32 Integral 48 Total via Astribank 500 via Gateways	800	960	via gateway
Recommended capacity (users)	200	250	1000	1500	up to 5000 users, licensed per amount of extensions
Extensions licensed	30 - 500	100-500	1500	2500	up to 5000 users, licensed per amount of extensions
Power supply	External	External	Internal	Internal	-
Hardware Echo Cancellation			optional	optional	-