What does the term 'SIP Trunking' refer to in Avaya solutions?

The term 'SIP Trunking' specifically refers to connecting an enterprise's phone system to an Internet Telephony Service Provider (ITSP) using the Session Initiation Protocol (SIP). This method allows organizations to use the internet to make and receive phone calls, thereby eliminating the need for traditional PSTN lines. By utilizing SIP trunks, businesses can gain flexibility and scalability in their communications, enabling them to manage voice calls over an IP network effectively.

SIP trunking offers several advantages, including reduced costs for long-distance calls, easier management of communication resources, and the ability to integrate various services such as video and data alongside voice communications. This capability enhances the overall efficiency of communication systems within enterprises.

The other options refer to different aspects of voice and telecommunications, such as local network connectivity and integrating traditional with modern technologies, but they do not capture the essence of SIP Trunking as accurately as the correct answer.