DRA (Diameter Routing Agent), serves as a centralized system that functions as a traffic controller and manages AAA (Authorization, Authentication, and Accounting) responsibilities between various signaling nodes. 

Within the core of a telecom network, various types of traffic are essential for establishing diverse communications with servers or nodes, collectively referred to as signaling traffic.

In essence, DRA simplifies and streamlines connections between nodes in the network core, ensuring smooth and efficient communication.

Key points:

• Ability to process 25,000 transactions per second*
• IMSI discrimination along with IMSI-based routing and filtering are included
• Fall-back policy, multi-homing of multiple IP, and able to prioritize routing by host or realm
• Destination realm substitution and forwarding mechanism