What does the abbreviation AOR stand for in telecommunications?

The abbreviation AOR stands for "Address of Record" in telecommunications. This term is significant in the context of protocols such as SIP (Session Initiation Protocol), which is widely used for initiating, maintaining, and terminating real-time sessions in an IP-based network. The Address of Record typically refers to the identifier that is used to reach a user, such as a SIP URI (Uniform Resource Identifier).

The AOR is crucial for establishing communication between endpoints and plays a key role in routing calls and messages to the correct destination. It enables the network to identify and connect to the user’s device efficiently. Understanding the function of the Address of Record is important for grasping how SIP operates, especially in scenarios involving user mobility, forwarding, and registration processes.

In contrast, other options provided pertain to different concepts that do not align with the common usage of AOR within telecommunications context. For instance, "Address of Reference" is not a standardized term in telecommunications; "Active Order Record" suggests a context that is more related to processing orders than communications; and "Allocation of Resources" focuses on resource management rather than user identification, making these options less relevant to the meaning of AOR in the field.