IP PBX phone system can operate over IP platform. With IP PBX, in addition to implementing the internal calls, calls to PSTN and mobile networks, this system also transmits voice and video over LAN, WAN and Internet.

Deploying IP PBX will reduce the costs of infrastructure investment, management, long-distance national and international callings, thereby the solution help your business reduce the total cost of investment. Being built up based on IP platform, it makes use of the available infrastructure. IP PBX systems offer a wide range of features from basic to advanced, which is the most significant advantage in comparison with the traditional PBX systems.

IP is a powerful tool supporting the enterprise, it can integrate with other management applications of the enterprise, such as CRM, ERP, etc.

The components that build up an IP PBX system include PABX (the available switchboard or self-construction switchboard), end-devices (the IP, Analog phones models, or Gateways) and the corresponding infrastructure systems (LAN)

 

 

Figure 1: General model

 

Easy for installation and configuration:

For anyone with the basic knowledge of the Information Technology and Communication can absolutely self-construct IPPBX systems.

 

Easy for maintenance management:

VoIP phone system interface is a web-based management for managers and end-users, enabling the easier management, maintenance and controlling the phone system. Hence, in comparison to the traditional PBX systems, IPPBX has the momentous distinction.

 

Reduce costs of calls:

With long-distance national and international callings, you can save money by using the VoIP service providers. It is easy to create the connection among the IPPBX systems in multiple offices or branches to implement various inter-branch callings for free.

 

Make use of the available LAN infrastructure:

VoIP system operates based on the LAN infrastructure, as a result, you do not have to pay any more penny for a new added line. Nor the maintenance costs. It offers more flexibility in creating or deleting phone subsidiary.

 

High Scalability:

A traditional system once needed to expand will require: upgrade the system with an expensive hardware, add new phone lines. However, the failure of expansion, now and then, forces you to pay for another new system. VoIP phone system is in contrast: an IP PBX system can manage a large number of branch phones easily – In short, for scalability, all you need to do is adding new phones to your current network.

 

Climax your customer service and productivit y:

Because the callings are IP-based, it is easier to develop and integrate with other business applications. Example: An incoming call can automatically interact with the database queries to get the customer information. Your customer service is helped to be better. An out call can be placed directly from Outlook (Click to Talk), there is no need to type a phone number.

 

Diverse terminals and easy to use:

The terminals can be easily compatible with the PBX system and support a wide range of features that the traditional PBX system cannot, such as the visibility of phone number, phone transferring, directories, conferences, video calls, etc.

 

Monitoring callings and efficient reporting:

VoIP phone system to store information in and out callings, you can access the information from anywhere and at anytime. It provides intelligence reports, professional costs, and call traffic, etc.

 

Allow moving easily:

IP can be easily moved to any position without affecting the configuration and functionality. Moreover, users just need to bring their terminals wherever an Ethernet port is available, plug in and use. Phone numbers and their personal information will not change.

 

And many more functions:

VoIP phone system is IP-based development, it will be easier for developers to research and develop. Therefore most of VOIP phone systems are fully functional, including auto attendant, voice mail, call queue, and many more. This function, generally, is not cheap once developed upon the traditional PBX.

 

 

Model

 

Figure 2: System model

Equipments including:

- LAN Infrastructure
- PBX: the available PBX or self-constructing PBX
- Terminals: Gateways, IP phone, Analog phone, or Soft phone

a. The available PBX:
It is a packaged PBX (appliance) with a wide range, variety of features and connectivity, offers many different options, depending on the purpose that you choose accordingly.

 

Advantages:

- Low cost, easy options.
- Simple to use, high stability.
- Support various features from basic to advanced.
- Continually update old features and enhance new features for free.

Disadvantages:

- Difficult to integrate additional applications compared to self-constructing IP PBX systems.
- Difficult to enhance the hardware configuration.

 

Deployment:

- Step 1: Select the needed number of CO line number.
- Step 2: Select the number of users.
- Step 3: Select features.
- Step 4: Select the appropriate PXB.
- Step 5: Select the appropriate terminals.
- Step 6: Conduct the PBX system’s installation and configuration.

 

b. Self-constructing PBX:
The development of open source softwares have changed the face of technology. Only with a computer and a free software package, we can build up a PBX system with advanced features. Based on the configuration of the computer, we can construct a PBX system with the equivalent number of subscribers.

Advantages:

- Be able to fully customized depending on the needs of the specific company.
- Easy to enhance the hardware configuration and features.
- Easy to integrate other applications.

Disadvantages:

- More complex implementation process because the PBX system asks many gathering components to constitute.
- Require the managers to have the specialized knowledge.

Deployment:

- Step 1: Select the devices connecting to the PSTN line corresponding to the CO lines.
- Step 2: Select the corresponding server
- Step 3: Install the operating system and PBX softwares.
- Step 4: Select the appropriate terminals
- Step 5: Conduct the system’s installation and configuration.