What are SIP calls and how does it work?

Smith, Emma

Publish: Monday, Sep 23
Category: Technology
SIP calls


(Session Initiation Protocol ) or SIP calls is a protocol used in Voice IP communications that allows you to make and receive voice and video calls.

SIP calls revolutionized communications years ago, allowing people to connect to different countries using multiple different devices.


SIP technology takes advantage of the benefits of Voice over IP to improve the quality of communications. The most important benefit offered by this technology was the reduction of communication costs, since calls between SIP users are free worldwide and without limits.


SIP technology has offered companies great benefits for years, since they have been integrated into telecommunications services, such as VoIP telephone network systems.


How do SIP calls work?


SIP calls require a SIP address and must also obtain a SIP client on the device you are going to use to make and receive calls. Then, you need to configure the SIP client based on other technical requirements.


As technology continues to advance, new services have also appeared to make procedures simpler.





What does it take to make and receive SIP calls?


To communicate through SIP, you need:


  • A SIP line, which is given to you through your telephone provider.
  • Installation of a softphone or interface on the computer to establish communications
  • Internet connection with high quality broadband. Preferably connected through ethernet.
  • Devices for making and receiving calls, such as a laptop, computer, cell phone, or tablet


What are the advantages and disadvantages?


Among the advantages of SIP calls, we find:


  1. Primary savings without ISDN (Integrated Services Digital Network). Since it only requires a stable internet connection, the costs of traditional equipment such as primary or ISDN networks are eliminated.


  1. Reduction of call costs. With the arrival of SIP calls, telephone providers reduced the costs of national and international calls. Both external and internal calls are now done online with no international costs.


  1. Supports a larger volume of calls. The number of simultaneous calls is no longer limited by wiring.


  1. It allows to you use area and countries codes different from where the company is currently located. You can use these numbers anywhere.


  1. Scalability. It allows businesses to contract a greater number of extensions or phone numbers in a much easier and simpler way.


The disadvantages of SIP calls lie in the emergence of new technologies, such as WebRTC, which has improved the quality of service in all aspects. This includes greater savings in costs and time, greater communication stability and better audio quality.


What is the difference between SIP calls and WebRTC calls?


We already know what SIP technology is, but … what is WebRTC? Web Real-Time Communication is an open source protocol developed by Google that allows the transmission of voice using browser applications. Unlike SIP, there is no need for additional tools such as softphones.


Calls through WebRTC show improved sound quality. This is because it stabilizes the transmission of voice in the highest possible quality.


We are talking about the newest Google tool in communication. The security and strength of this technology shows.


Additionally, by not requiring softphones, WebRTC offers total mobility. You can make and receive calls anywhere, with any device. Without new investments and without device purchases. With WebRTC, you can communicate with coworkers or customers from your own cell phone or computer.


Find out more on our website: WebRTC


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