What does GRUU stand for?

GRUU stands for "Globally Routable User Agent URI." This term relates to the Session Initiation Protocol (SIP) and is essential for the identification of user agents in a network. A GRUU is a universally unique URI that can be used to route SIP messages to a specific device, even if that device's location or IP address changes.

The use of a GRUU enables more efficient communication because it allows for direct routing of SIP messages to a user agent, avoiding the need for further resolution steps. This is particularly important in scenarios where users may be connecting from various locations with different devices. GRUU ensures that the user's current location is accurately captured and addressed, maintaining seamless communication.

Understanding the functionality and significance of GRUU is vital for anyone working with SIP technologies, as it plays a crucial role in ensuring proper user agent identification and connectivity across different networks and scenarios.