Why You Need Session Agents

You can use session agents to describe next or previous hops. You can also define and identify preferred carriers to use for traffic coming from session agents. This set of carriers is matched against the local policy for requests coming from the session agent. Constraints can also be set for specific hops.

In addition to functioning as a logical next hop for a signaling message, session agents can provide information regarding next hops or previous hops for SIP packets, including providing a list of equivalent next hops.