What configurations are necessary for establishing a SIP trunk in Avaya Aura?

To establish a SIP trunk in Avaya Aura, defining trunk groups and establishing route patterns is a critical configuration step. A trunk group is essential for grouping multiple SIP trunks together, allowing for efficient routing of calls through the system. The trunk group configuration involves specifying the trunk type, signaling, and various other parameters necessary for call management.

Additionally, establishing route patterns is key for determining how calls are routed through the network. Route patterns dictate which trunk group a call will use based on the dialed number, ensuring that the calls are properly directed to their intended destinations. When both trunk groups and route patterns are configured correctly, they facilitate the successful establishment and management of SIP trunk communication, enabling seamless voice services over the IP network.

Other configurations, such as IP addresses, while necessary for network connectivity, do not encompass the comprehensive requirements for SIP trunk establishment on their own. Similarly, configuring firewall settings is essential for security but is not specifically geared towards SIP trunk establishment. Setting up user accounts pertains to user access and permissions rather than the technical configuration of SIP trunks. Thus, the most relevant answer is the one that includes defining trunk groups and route patterns.