A company's Private Branch Exchange (PBX) system is an important platform for managing and coordinating incoming and outgoing calls within the organization. Here are some types of corporate PBX:

1. Analog PBX

• Features: This is a traditional switchboard that uses copper telephone wires to connect calls. Calls are handled through an electronic switching system.
• Advantages: Simple, easy to use, high stability.
• Disadvantages: Limited scalability, high maintenance costs, lack of modern features like video conferencing, integration with customer relationship management (CRM) systems.

2. IP PBX

• Features: Uses VoIP (Voice over IP) technology to convert calls over IP networks instead of traditional telephone lines.
• Advantages: Easy integration with other IT systems, flexible in expansion and migration, many modern features such as video conference, integration with CRM, web management.
• Disadvantages: Requires stable internet connection, initial investment costs can be high.

3. Cloud PBX

• Features: A cloud-based PBX solution where calls are managed and processed through online servers instead of on-premises hardware.
• Advantages: No on-premises hardware required, easy to scale and upgrade, supports remote work, pay-as-you-go (OPEX) model instead of large initial investment (CAPEX).
• Cons: Depending on internet connection, security and privacy issues can be a concern.

4. Hybrid PBX

• Features: Combines analog, digital, and IP PBX, allowing businesses to use both traditional phone lines and VoIP.
• Advantages: Flexible in converting and upgrading the system, taking advantage of existing infrastructure, providing modern features without replacing the entire system.
• Disadvantages: Can be complicated to manage and maintain, investment costs can be high if multiple systems need to be integrated.

5. Virtual PBX

• Features: A form of cloud PBX, but often provided as a service for small and medium-sized businesses. All PBX functions are performed via an application on a computer or mobile phone.
• Advantages: Low cost, easy to install and use, no specialized hardware required.
• Cons: Often lacks some of the complex features that larger systems offer, depends on internet connection.

6. Mobile PBX

• Features: Allows transfer of switchboard functions to employees' mobile devices, supporting flexible working from anywhere.
• Advantages: Flexible, easy to use, good support for businesses with employees who travel frequently.
• Disadvantages: Depending on mobile and internet connectivity, security and management issues can be more complicated.