What protocol is used for sending Feature Lint Ions and Dial Plan information to an Avaya Aura Communication Manager controlled SIP Endpoint?

The protocol used for sending Feature Lint Ions and Dial Plan information to an Avaya Aura Communication Manager controlled SIP Endpoint is the Session Description Protocol (SDP).

SDP is crucial for the establishment of multimedia sessions over the Internet Protocol (IP) and is widely utilized in SIP communications. It provides necessary information about the media formats, their details, and for negotiation between endpoints what capabilities are available.

While other protocols like STUN/TURN assist in handling NAT traversal, PPM relates to user profile management and interactions outside direct call control, and H.248 deals with media gateways and not SIP endpoints, they do not specifically convey the Feature Lint Ions and Dial Plan details needed for SIP communication. Thus, SDP is the appropriate choice for this context, effectively facilitating the parameters for communication between Avaya systems and SIP endpoints.