A hosted PBX provides business telephony functions from infrastructure operated by a provider rather than a call-control appliance kept at the customer site. It may manage extensions, numbers, routing, voicemail, queues and applications, depending on the plan. Handsets, internet access, local network, emergency calling, number porting and integrations still create customer-side dependencies. Cloud hosting does not guarantee call quality or uninterrupted service; resilience depends on provider design, circuits, endpoints and failure routing. Before adoption, organisations should define ownership, support boundaries, concurrent-call capacity, recording, retention, security, exit and what happens during a site outage. Tests should cover inbound and outbound calls, transfers, caller identity, two-way audio and recovery. Subscription price alone is not the total operating or migration cost.
IT glossary
Hosted PBX
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