https://www.portsip.com/
Multi-Tenant PBX for Cloud PBX Service Providers and MVNOs
Sep 7, 2025 - PortSIP multi-tenant PBX empowers service providers and MVNOs to host cloud PBX, UCaaS, CPaaS, and CCaaS businesses, driving innovation in cloud communications...
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Cloud Communications
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https://www.3cx.com/pbx/multi-tenant/
Multi-Tenant PBX for MSPs & Resellers | Host Multiple Clients | 3CX
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