Which two statements are true regarding Full and Half call model processing in Avaya systems?

The client has finished deploying Avaya Aura Communication Manager (CM) and has signed a service contract with Avaya for technical support.
What should the system administrator do in CM to allow Avaya services to log in and support the platform?

A customer called Avaya Support after their telecom administrator was unable to add 50 new telephones for new hires. Avaya Support determined that the number of telephones exceeded the capacity the system could support. Which pre-implementation step was omitted?

Which critical Avaya Aura Communication Manager (CM) information can be obtained from the ECS log located in the /var/log/ecs directory? (Choose all that apply.)

A customer reports that when they make a call from an H.323 endpoint at the Main office to an H.323 telephone at the Branch office across the WAN, the call fails due to codec mismatch. Which five Avaya Aura Communication Manager (CM) System Administration Terminal (SAT) forms can be used to troubleshoot this problem? (Choose five.)