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Hosted PBX vs On-Premises PBX vs Analog PBX

Discover the differences, advantages, and operation of a hosted, on-premises, or analog PBX to choose the solution that suits your business.

GuideNovember 10, 2025

Hosted PBX vs On-Premises PBX vs Analog PBX

Business phone systems have evolved from analog lines to IP solutions and then to the cloud. Today, hosted PBX offers flexibility and advanced features without hardware constraints. This article compares the three PBX models, explains how a hosted PBX works, and guides you in choosing the solution best suited to your organization.

What is a hosted PBX?

A hosted PBX is a business phone system based entirely in the cloud, provided and managed by a service provider. It replaces the company's physical hardware with cloud servers, delivering core functions (calling, routing, transfer) as well as advanced capabilities (video conferencing, dynamic IVR, CRM integrations).

Deployment model: cloud vs on-premises vs analog

The hosted PBX is managed by the provider, the on-premises PBX is installed in your own infrastructure, and the analog PBX relies on traditional telephone lines. Costs, maintenance, scalability, and remote access vary considerably depending on the model chosen.

How a hosted PBX works

Calls travel over your internet connection, voices are converted into VoIP packets, then routed to the provider’s cloud servers, which handle routing, conversion to the PSTN and distribution to recipients. Management is handled through a web portal, with multi-data-center redundancy to ensure 99,99 % availability.

Advantages of hosted PBX

It offers rapid deployment, minimal maintenance, instant scalability, full mobile access, and advanced features without hardware investment. These advantages make it the preferred choice for SMEs, remote teams, and growing organizations.

When should you choose an on-premises or analog PBX?

Companies with internal IT resources, strict regulatory constraints, or a need to integrate with legacy systems prefer an on-premises PBX. An analog PBX remains relevant for users who require only basic calling features and do not wish to migrate to digital.

Choosing the right hosted PBX provider

Evaluate the provider’s reputation, data center availability, security options, compatibility with your business applications, and customer support. Yeastar, the official distributor in Morocco, offers a reliable hosted solution suited to the needs of African businesses.

The Yeastar team supports businesses and integrators in assessing their needs, selecting an architecture, and preparing for deployment.

Business phone systems have evolved from cumbersome analog setups to IP solutions and then to the cloud. A hosted PBX, managed by a provider, offers flexibility, cost savings, and modern features. This article guides you through the concepts, comparisons, and selection criteria to determine whether the cloud is the right option for your organization.

What is a hosted PBX?

A hosted PBX is a business phone system based entirely in the cloud, provided and managed by a provider. It replaces physical on-site hardware with cloud servers, delivering core features (calling, routing, transfer) as well as advanced features (video conferencing, IVR, CRM integrations).

Core principle: the cloud PBX

A hosted PBX moves the entire system to the cloud, eliminating the need for a physical PBX unit and a dedicated IT team. Calls travel over the Internet using VoIP, while the provider manages the infrastructure, updates, and security.

Key features of a hosted PBX

In addition to traditional functions, a hosted PBX offers real-time video conferencing, auto-attendant, dynamic IVR menus, integration with CRM applications, and support for softphones and mobile devices.

Easy access, anywhere and on any device

Providers offer desktop, web, and mobile interfaces, allowing users to access phone features from any device through softphones such as Linkus UC Clients.

Why businesses are moving to the cloud

A hosted PBX combines the power of a traditional PBX with the flexibility of the cloud, reducing infrastructure and maintenance costs while offering modern features suited to agile work environments.

Comparison: hosted PBX, on-premises PBX, and analog PBX

The hosted PBX stands out for its cloud model, the on-premises PBX for its local control, and the analog PBX for its legacy analog network. The choice depends on requirements for control, security, and budget.

On-premises PBX – local model

An on-premises PBX is installed and maintained at the company’s premises, providing full control over configuration and security. It can be analog or IP and often integrates with business systems (CRM, ERP).

Analog PBX – the previous generation

An analog PBX relies on traditional telephone lines and heavy cables. It is gradually being replaced by IP and cloud solutions, particularly with the planned retirement of the PSTN network in 2027.

System	Hosted PBX	On-premises PBX	Traditional analog PBX
Deployment	Cloud-based, managed by the provider	On-site (physical hardware)	On-site (analog hardware)
Management	Managed by the provider	Internal IT team	Internal IT team
Initial cost	Low	Moderate (hardware and installation)	High (cabling and hardware)
Maintenance	Included in the service	Manual, managed internally	Manual, managed internally
Scalability	Instant addition of users/devices	Requires hardware upgrades	Very limited
Remote access	Fully supported through applications	Requires special configurations	Not supported
Features	Extensive (IVR, call routing, voicemail to email)	Moderate to advanced	Very limited
Best for	Growing SMEs, remote teams, multi-site organizations	Businesses with internal IT and a fixed setup	Legacy users requiring basic calls

How a hosted PBX works

The system operates over an Internet connection, converting voice into VoIP packets and routing them through the provider’s cloud. Calls to landlines or mobile phones go through the PSTN, and management is handled through a centralized web portal.

Advantages of hosted PBX

It reduces upfront costs, offers flexible pricing, ensures high availability through cloud redundancy, and provides access to modern collaboration tools without local maintenance.