30 - 200 users, small business IP PBX phone systems comparison

VoIP PBX (Private Branch Exchange) business telephony for small business compared
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Smaller Phone Systems
Bigger Phone Systems
Feature/ModelSoftware PBX (CompletePBX virtual machine)Swift IP PBX FamilySwan IP PBX Family
download-software-pbxCompact PBX SystemSwan - powerful elegance. 1U IP-PBX up to 500 extensions
Extensions licensed up to 5000 users, licensed per amount of extensions30-500up to 500 via gateway
Recommended capacity (users)up to 5000 users, licensed per amount of extensions200250
Max. concurrent calls (SIP only)based on resources200200
Max. concurrent calls (PRI + FXS) -3060
Max. analog ports (FXS, FXO)via gatewayup to 4 FXO (integral)
up to 4 FXO/FXS via Astribank		up to 32 Integral
48 Total via Astribank
500 via Gateways
Max. digital ports
BRI ISDNvia gateway8 via Astribankup to 8 Integral
E1/T1 PRI, E1 R2, T1 CASvia gateway1 via Astribankup to 2 Integral
Ethernet ports-1 x 1 GB
2 x 1 GB
Mass storage-32 GB
250 GB
RAID1 (2 HDDs)-image001image001
Hardware Echo Cancellation-via Astribank / gatewayimage001
Analog Line Failover-image001image001
Rapid RecoveryVM snaphotimage001image001
Internal backup and restoreVM snaphotimage001image001
Power supply notification -image001image001
Front panel LCD and keypad-image001image001
Front panel USB access-image001image001
Power supply-External
External
Size-13 cm x 9 cm x 3 cm
1U
Fan redundancy-FanlessFanless
SoftwareCompletePBX VM, available for VMware, Hyper-V and Oracle VirtualBox, free upgrade under warranty / service agreementCompletePBX5 software, free upgrade under warranty / service agreementCompletePBX5 software, free upgrade under warranty / service agreement