OpenScape Business S — Server-Based UC PBX (Software)
The pure software member of the OpenScape Business family — up to 1500 IP subscribers with UC Suite functionality. X1–X8 cabinets stop at 500 subscribers; beyond that, Business S takes over. Runs on a Linux server; fully virtualized with VMware vSphere or MS Hyper-V, operated in your own data centre or hosted (private cloud). Public network connectivity via ITSP (SIP); X-series cabinets join the network as gateways where digital/analog trunks are required.
From the same family
Specifications
- Type
- Pure software UC PBX
- Subscribers
- Max. 1500 IP (with UC Suite)
- Platform
- Linux server
- Virtualization
- VMware vSphere, MS Hyper-V
- Deployment
- Own data centre or hosted (private cloud)
- Public network
- ITSP (SIP); X-series gateway for ISDN/analog trunks
- Family position
- Scenarios beyond X1–X8 (max. 500 subscribers)
Key features
- Pure software PBX — max 1500 IP subscribers, UC Suite functionality.
- The only OSBiz option above the 500-subscriber ceiling of X1–X8.
- Linux server; full virtualization with VMware vSphere / MS Hyper-V.
- In your own data centre or hosted — private cloud keeps data control with you.
- Public network via ITSP (SIP); X-series cabinets act as gateways for digital/analog trunks.
- Promark: server/VM sizing, installation, licensing and network design.
- Current software release is OpenScape Business V4 (30.07.2026): X systems with a V3 mainboard and Business S move to V4 via a standard software upgrade; existing licences remain valid.
Typical applications
Single central PBX for organizations with 500+ subscribers.
Moving the PBX into virtualized IT infrastructure as a VM.
Central software + X gateways at branches in multi-site networks.
Related Solutions
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DetailsThe pure software member of the OpenScape Business family — up to 1500 IP subscribers with UC Suite functionality. X1–X8 cabinets stop at 500 subscribers; beyond that, Business S takes over. Runs on a Linux server; fully virtualized with VMware vSphere or MS Hyper-V, operated in your own data centre or hosted (private cloud). Public network connectivity via ITSP (SIP); X-series cabinets join the network as gateways where digital/analog trunks are required.