Zoom Phone is a cloud PBX that brings calling, collaboration, and AI together on one platform — no on-site hardware, no separate AI license, and no hidden fees.
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Zoom Phone is a cloud PBX that brings calling, collaboration, and AI together on one platform — no on-site hardware, no separate AI license, and no hidden fees.
A modern cloud PBX includes more than just dial tone. Here's what to expect from a full-featured system:
Moving from on-premises PBX to the cloud can feel like a large undertaking — but with the right process, teams can complete the migration without a single dropped call.
For businesses with existing Avaya or Mitel infrastructure, Zoom Phone supports hybrid deployments — letting you extend your current system while transitioning to cloud-based calling at your own pace, reducing operational disruption during the migration.
A cloud PBX (Private Branch Exchange) phone system is a business phone solution hosted and managed over the internet, replacing traditional on-premise PBX hardware. It delivers all the call management capabilities of an enterprise phone system — auto attendant, extension management, call queues, voicemail, call recording — through software rather than physical equipment installed at your office.
On-premises PBX requires purchasing, installing, and maintaining physical telephony hardware at your location. Cloud PBX delivers the same call management capabilities over the internet, managed by your provider. The practical differences: cloud PBX eliminates upfront hardware costs, scales without physical additions, works from any device and location, and handles disaster recovery automatically. On-premises systems require your IT team — or a vendor support contract — to manage updates, maintenance, and hardware failures.
No specialized hardware is required. Cloud PBX systems work through desktop and mobile apps, and supported web browsers — your team can make and receive business calls on compatible devices they already own. If you prefer desk phones, most cloud PBX providers — including Zoom Phone — are compatible with certified IP desk phones from brands like Poly Edge, Yealink, and Cisco. You don't need to replace existing certified hardware.
Yes. Most cloud PBX providers support number porting — transferring your existing business phone numbers to the new system. Zoom Phone includes number porting at no additional charge. The porting process typically takes a few business days per batch of numbers, and your existing service remains active during the transition so there's no coverage gap for your customers.
A quality cloud PBX provider builds redundancy into the platform. Zoom Phone includes local survivability — a feature that keeps basic calling operational at a location even if the main internet connection goes down, by routing calls through a local backup path. For businesses requiring maximum resilience, evaluating a provider's uptime SLA and local survivability options is an important buying criterion. Zoom Phone offers up to a 99.999% uptime SLA.
A virtual phone number is a single phone number not tied to a physical phone line — typically used by individuals or very small teams for a professional appearance. Cloud PBX is a complete business phone system: it supports an entire organization's calling infrastructure — hundreds or thousands of extensions, multi-level auto attendant, call queues, analytics, call recording, and AI — all managed centrally from one admin portal. A virtual phone number is a feature; cloud PBX is the system.
Cloud PBX pricing is typically per user, per month — most solutions range from roughly $10 to $40 per user depending on the feature tier and calling plan included. When evaluating total cost, look beyond the per-user fee: some providers charge additional fees for 911 service, SMS, number porting, and AI features. Zoom Phone includes no hidden fees for SMS or E911 service, and AI call summaries and voicemail prioritization are included in standard plans at no extra cost. See Zoom Phone plans and pricing.
Cloud PBX is well-suited for businesses of any size. For small teams, the primary advantage is eliminating the upfront hardware cost and IT overhead of an on-premises system — most setups take hours, not weeks, and no telephony expertise is required. For larger organizations, cloud PBX enables centralized management across multiple locations, scales without physical infrastructure additions, and supports global PSTN coverage for international operations. The per-user pricing model also means small businesses only pay for the capacity they actually use.
Zoom Phone delivers a complete cloud PBX — with AI built in, on every device, managed from one place.