Before SIP Trunking configuration can begin, which state must the Avaya Session Border Controller for Enterprise (SBCE) be in?

A. Registered
B. Provisioned

C. Commissioned

D. Ready

Prerequisite Conditions for SIP Trunking
Starting point for SIP-trunking administration:
System Management > Installed tab shows SBC(s) Commissioned indicates a successful initial console configuration.

References: Avaya Aura Session Border Controller Enterprise Implementation and Maintenance (2012), page 302