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30 users small office VoIP PBX (Private Branch Exchange) phone systems comparison

Feature/ModelSpark CXS1000CXR1000 / XR1000Software PBX (CompletePBX virtual machine)
Small office PBXFor businesses with standard telephony requirements, where telephone traffic is typically at 40% usage, the XR1000 series provides a reliable and cost-effective solution for businesses with up to 30 users. download-software-pbx
Max. capacity (users)3030up to 5000 users, licensed per amount of extensions
Max. concurrent calls (SIP only)3055Based on resources
Max. concurrent calls (PRI + FXS) 1010-
Max. analog ports (FXS, FXO)1616via gateway
Max. digital ports:
BRI ISDN88via gateway
E1/T1 PRI, E1 R2, T1 CAS1/2**image001via gateway
Ethernet ports1 x 100 mb1 x 1 GB-
Mass storage8 GB 16 GB-
Rapid Recoveryimage001image003VM snaphot
Internal backup and restoreimage001image001VM snaphot
Power supplyExternalExternal-
Size9"19" 1U-
SoftwareCompletePBX5 software, free upgrade under warrantyCompletePBX5 software, free upgrade under warrantyCompletePBX VM, available for VMware, Hyper-V and Oracle VirtualBox
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