A SIP Trunk is a bridge established between an IP telephony system and a Voice over IP (VoIP) operator. The SIP Trunk relies on the SIP (Session Initiation Protocol), a communication protocol used by IPBX equipments.

The PABX (Private Automatic Branch eXchange) or IPBX (Internet Protocol Private Branch eXchange) is a private automatic switch (switch board). It allows for the automatic routing of calls, configuring an Interactive Voice Response (IVR) system to direct incoming calls, or adding new telephone lines independently through a dedicated web interface.

Voice over IP, abbreviated as “VoIP,” is a communication technology that allows the transmission of voice and other multimedia data over the Internet. Unlike traditional telephone systems that use landlines, VoIP converts voice into digital data packets that are transmitted via the Internet. This approach offers numerous advantages, including reduced communication costs, increased flexibility, and improved audio quality. Calls can be made from computers, smartphones, tablets, or dedicated IP phones, making communication more accessible and convenient.

One of the primary advantages of VoIP (Voice over IP) for companies is its low cost due to the sharing of voice channels. It also allows the company’s telephone system to benefit from various additional services related to call management, such as:

• Intelligent routing on an interactive voice response server

• Call transfer

• Fixed-Mobile Convergence

• Multi-party conversations

• Call forwarding or placing on hold.

Finally, as all interactions are treated as data, they can transit both on land and mobile telephony networks. Employees are reachable at all times, and the administration of VoIP is simplified to ensure constant adaptation to the company’s constraints.