Transaction Stateful Proxy

In the transaction stateful proxy mode:

• Adds state to the proxy (not dialogs).
• Has lower number of messages per call. No Record Route header added and no BYES.
• Keeps transaction state (timers and retransmissions.
• Enforces session restrictions (32k) because of state management. These restrictions can be increased.
• Can restrict functionality by specification. This can mean no media management, limited potential for RADIUS accounting, and no CALEA (no Release/BYE message for CDC).
• Acts as routing device with transaction timers, with local policy routing and ENUM routing.
• Can off-load some transactions across unreliable links.