A SIP trunk, also known as a Session Initiation Protocol trunk, is a virtual connection between a PBX and a VoIP provider. It allows businesses to make and receive phone calls over the internet, without the need for traditional phone lines. 3CX is a popular PBX system that offers a variety of SIP trunking options.
There are many benefits to using SIP trunks with 3CX, including cost savings, increased flexibility, and improved call quality. SIP trunks are typically less expensive than traditional phone lines, and they can be easily scaled up or down to meet the changing needs of a business. Additionally, SIP trunks offer a number of features that can improve call quality, such as echo cancellation and jitter buffering.