Avaya Exam 33820X Topic 3 Question 31 Discussion

A customer with a large Contact Center needs a self-service landing pad for incoming calls to handle all the requests that don't require agent support, and also provide a means to fairly distribute agent-bound calls among multiple sites by using Avaya Intelligent Customer Routing (ICR).

When there are multiple Communication Manager (CM) systems, what allows ICR to connect to the PSTN and CM with Call Center Elite systems via SIP?