An Insight into Class 5 Softswitch for VoIP Service Providers


Over a period of time, Softswitches using VoIP technology have become much popular in the field of telecommunication. ‘Softswitch’ is a popular term, frequently used interchangeably as a physical device that is utilized to connect telecommunications, or as software installed onto servers to virtually connect IP to IP calls. For VoIP service providers, Softswitch acts as an essential device in a telecommunications network that acts as a VoIP server, allowing telecommunication networks to provide management of voice, fax, data, video traffic, and call routing. 

Types of VoIP Softswitch

VoIP switches usually come in two types:

  • Class 4 Softswitch
  • Class 5 Softswitch

The class 4 Softswitch is generally used to support long-distance call routing. Also known as the wholesale solution, this Softswitch is largely used by VoIP wholesale carriers to route voice traffic securely over long distances. It is best suitable to route the heavy volume of call traffic. It can easily route call traffic between and over diverse exchanges as well as LATAs (Local Access and Transport Areas). When the call is initiated, the switch ensures that it reaches the correct recipient via the most efficient route. 

The class 5 Softswitch on the other hand is generally used to provide services directly to the customers and end-users. It is also used to route calls. However, it comes with additional features like conference calls, voicemail, call forwarding, etc. As compared to class 4 switch, class 5 switch route calls in relatively small areas. Businesses that opt for a hosted PBX system usually get a class 5 switch to manage their business voice traffic within a country, town, or city. 

The simplest way to describe the difference between Class 4 and Class 5 switches is to consider Class 4 as ‘wholesale switches’ and Class 5 as ‘Retail switches’. Class 4 will be used by the wholesale carrier to let traffic move towards long distances, whereas a Class 5 switch will be used to connect the call to the end-users. 

Class 5 Softswitch for VoIP Service Providers

Let’s have a detailed look over the class 5 switch for VoIP service providers. 

A Class 5 Softswitch is a type of hardware that is used by VoIP providers, cell phone carriers, and PSTN carriers to connect phones, and other devices with each other. To leverage the benefit of VoIP calling, the class 5 switches can be connected to the IP phones and even with simple phones by using an IP adapter. The end users can also leverage the VoIP services from their Smartphone or tablet using an application known as VoIP mobile dialer. 

VoIP providers make use of the VoIP class 5 switches that work through the SIP protocol. When an IP call is made by the customer, it connects them to the provider’s Softswitch through the internet. After that, the Softswitch routes the call to the right IP address, SIP address, or DID number. 

Features of Class 5 Softswitch

Some of the key features of Class 5 Softswitch that are common to most businesses and residential VoIP service providers include:

  1. Auto-attendant
  2. Call forwarding
  3. Call rules (find me/follow me/DND)
  4. Call transfer
  5. Call waiting
  6. Caller ID
  7. Conference calling
  8. Enhanced voicemail
  9. In-network calling
  10. Music
  11. Ring/hunt groups
  12. UCC
  13. Video Conferencing support, etc. 

Advantages of Class 5 Softswitch

Some of the key benefits of class 5 switches for VoIP service providers include:

  1. For the VoIP providers, the class 5 switch can be used to bill customers automatically.
  2. The class 5 VoIP Softswitch can be connected to any phone including the IP phone, traditional phone, cloud, and other VoIP Softswitch.
  3. VoIP providers can make money by selling international calling minutes using a calling card. 
  4. Another key benefit of the class 5 switch for the VoIP service providers is that it can be installed on any server and it does not have to be on a customer’s premises. 
  5. Choice of component and cost-efficiency
  6. Being a complete Softswitch software, thus there is no need to install extra hardware and wiring.
  7. With class 5 Softswitches, the cost and maintenance charges of hardware can be reduced to a great extent. A simple update is enough to solve several issues in software. Therefore, no further maintenance cost for a Softswitch.
  8. Class 5 Softswitches comes with the flexibility of adding or removing the lines depending upon the growth of the business. This makes Class 5 a perfect fit for the startup VoIP service provider.


To conclude, Softswitch is an essential part of any VoIP Business. It acts as an important tool in connecting VoIP calls. Class 5 switches assist VoIP service providers in the smooth and flawless functioning of their VoIP business. Nowadays, there are several VoIP development companies that provide custom class 5 Softswitch development services. You can choose the Softswitch with particular features that best suits your business requirements. 

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